Menu

This is documentation for the next version of Loki. For the latest stable release, go to the latest version.

Grafana Loki documentation Configuration parameters

Grafana Loki configuration parameters

You can use Grafana Cloud to avoid installing, maintaining, and scaling your own instance of Grafana Loki. Create a free account to get started, which includes free forever access to 10k metrics, 50GB logs, 50GB traces, & more.

Grafana Loki is configured in a YAML file (usually referred to as loki.yaml ) which contains information on the Loki server and its individual components, depending on which mode Loki is launched in.

Configuration examples can be found in the Configuration Examples document.

Printing Loki config at runtime

If you pass Loki the flag -print-config-stderr or -log-config-reverse-order, (or -print-config-stderr=true) Loki will dump the entire config object it has created from the built-in defaults combined first with overrides from config file, and second by overrides from flags.

The result is the value for every config object in the Loki config struct, which is very large…

Many values will not be relevant to your install such as storage configs which you are not using and which you did not define, this is expected as every option has a default value if it is being used or not.

This config is what Loki will use to run, it can be invaluable for debugging issues related to configuration and is especially useful in making sure your config files and flags are being read and loaded properly.

-print-config-stderr is nice when running Loki directly e.g. ./loki as you can get a quick output of the entire Loki config.

-log-config-reverse-order is the flag we run Loki with in all our environments, the config entries are reversed so that the order of configs reads correctly top to bottom when viewed in Grafana’s Explore.

Reload at runtime

Promtail can reload its configuration at runtime. If the new configuration is not well-formed, the changes will not be applied. A configuration reload is triggered by sending a SIGHUP to the Promtail process or sending a HTTP POST request to the /reload endpoint (when the --server.enable-runtime-reload flag is enabled).

Configuration file reference

To specify which configuration file to load, pass the -config.file flag at the command line. The value can be a list of comma separated paths, then the first file that exists will be used. If no -config.file argument is specified, Loki will look up the config.yaml in the current working directory and the config/ subdirectory and try to use that.

The file is written in YAML format, defined by the scheme below. Brackets indicate that a parameter is optional. For non-list parameters the value is set to the specified default.

Use environment variables in the configuration

Note: This feature is only available in Loki 2.1+.

You can use environment variable references in the configuration file to set values that need to be configurable during deployment. To do this, pass -config.expand-env=true and use:

${VAR}

Where VAR is the name of the environment variable.

Each variable reference is replaced at startup by the value of the environment variable. The replacement is case-sensitive and occurs before the YAML file is parsed. References to undefined variables are replaced by empty strings unless you specify a default value or custom error text.

To specify a default value, use:

${VAR:-default_value}

Where default_value is the value to use if the environment variable is undefined.

Pass the -config.expand-env flag at the command line to enable this way of setting configs.

Generic placeholders

  • <boolean> : a boolean that can take the values true or false
  • <int> : any integer matching the regular expression [1-9]+[0-9]*
  • <duration> : a duration matching the regular expression [0-9]+(ns|us|µs|ms|[smh])
  • <labelname> : a string matching the regular expression [a-zA-Z_][a-zA-Z0-9_]*
  • <labelvalue> : a string of unicode characters
  • <filename> : a valid path relative to current working directory or an absolute path.
  • <host> : a valid string consisting of a hostname or IP followed by an optional port number
  • <string> : a string
  • <secret> : a string that represents a secret, such as a password

Supported contents and default values of loki.yaml

# A comma-separated list of components to run. The default value 'all' runs Loki
# in single binary mode. The value 'read' is an alias to run only read-path
# related components such as the querier and query-frontend, but all in the same
# process. The value 'write' is an alias to run only write-path related
# components such as the distributor and compactor, but all in the same process.
# Supported values: all, compactor, distributor, ingester, querier,
# query-scheduler, ingester-querier, query-frontend, index-gateway, ruler,
# table-manager, read, write. A full list of available targets can be printed
# when running Loki with the '-list-targets' command line flag.
# CLI flag: -target
[target: <string> | default = "all"]

# Enables authentication through the X-Scope-OrgID header, which must be present
# if true. If false, the OrgID will always be set to 'fake'.
# CLI flag: -auth.enabled
[auth_enabled: <boolean> | default = true]

# The amount of virtual memory in bytes to reserve as ballast in order to
# optimize garbage collection. Larger ballasts result in fewer garbage
# collection passes, reducing CPU overhead at the cost of heap size. The ballast
# will not consume physical memory, because it is never read from. It will,
# however, distort metrics, because it is counted as live memory.
# CLI flag: -config.ballast-bytes
[ballast_bytes: <int> | default = 0]

# Configures the server of the launched module(s).
[server: <server>]

# Configures the distributor.
[distributor: <distributor>]

# Configures the querier. Only appropriate when running all modules or just the
# querier.
[querier: <querier>]

# The query_scheduler block configures the Loki query scheduler. When configured
# it separates the tenant query queues from the query-frontend.
[query_scheduler: <query_scheduler>]

# The frontend block configures the Loki query-frontend.
[frontend: <frontend>]

# The query_range block configures the query splitting and caching in the Loki
# query-frontend.
[query_range: <query_range>]

# The ruler block configures the Loki ruler.
[ruler: <ruler>]

# The ingester_client block configures how the distributor will connect to
# ingesters. Only appropriate when running all components, the distributor, or
# the querier.
[ingester_client: <ingester_client>]

# The ingester block configures the ingester and how the ingester will register
# itself to a key value store.
[ingester: <ingester>]

# The index_gateway block configures the Loki index gateway server, responsible
# for serving index queries without the need to constantly interact with the
# object store.
[index_gateway: <index_gateway>]

# The storage_config block configures one of many possible stores for both the
# index and chunks. Which configuration to be picked should be defined in
# schema_config block.
[storage_config: <storage_config>]

# The chunk_store_config block configures how chunks will be cached and how long
# to wait before saving them to the backing store.
[chunk_store_config: <chunk_store_config>]

# Configures the chunk index schema and where it is stored.
[schema_config: <schema_config>]

# The compactor block configures the compactor component, which compacts index
# shards for performance.
[compactor: <compactor>]

# The limits_config block configures global and per-tenant limits in Loki.
[limits_config: <limits_config>]

# The frontend_worker configures the worker - running within the Loki querier -
# picking up and executing queries enqueued by the query-frontend.
[frontend_worker: <frontend_worker>]

# The table_manager block configures the table manager for retention.
[table_manager: <table_manager>]

# Configuration for 'runtime config' module, responsible for reloading runtime
# configuration file.
[runtime_config: <runtime_config>]

# Configuration for tracing.
[tracing: <tracing>]

# Configuration for usage report.
[analytics: <analytics>]

# Common configuration to be shared between multiple modules. If a more specific
# configuration is given in other sections, the related configuration within
# this section will be ignored.
[common: <common>]

# How long to wait between SIGTERM and shutdown. After receiving SIGTERM, Loki
# will report 503 Service Unavailable status via /ready endpoint.
# CLI flag: -shutdown-delay
[shutdown_delay: <duration> | default = 0s]

server

Configures the server of the launched module(s).

# HTTP server listen network, default tcp
# CLI flag: -server.http-listen-network
[http_listen_network: <string> | default = "tcp"]

# HTTP server listen address.
# CLI flag: -server.http-listen-address
[http_listen_address: <string> | default = ""]

# HTTP server listen port.
# CLI flag: -server.http-listen-port
[http_listen_port: <int> | default = 3100]

# Maximum number of simultaneous http connections, <=0 to disable
# CLI flag: -server.http-conn-limit
[http_listen_conn_limit: <int> | default = 0]

# gRPC server listen network
# CLI flag: -server.grpc-listen-network
[grpc_listen_network: <string> | default = "tcp"]

# gRPC server listen address.
# CLI flag: -server.grpc-listen-address
[grpc_listen_address: <string> | default = ""]

# gRPC server listen port.
# CLI flag: -server.grpc-listen-port
[grpc_listen_port: <int> | default = 9095]

# Maximum number of simultaneous grpc connections, <=0 to disable
# CLI flag: -server.grpc-conn-limit
[grpc_listen_conn_limit: <int> | default = 0]

# Comma-separated list of cipher suites to use. If blank, the default Go cipher
# suites is used.
# CLI flag: -server.tls-cipher-suites
[tls_cipher_suites: <string> | default = ""]

# Minimum TLS version to use. Allowed values: VersionTLS10, VersionTLS11,
# VersionTLS12, VersionTLS13. If blank, the Go TLS minimum version is used.
# CLI flag: -server.tls-min-version
[tls_min_version: <string> | default = ""]

http_tls_config:
  # HTTP server cert path.
  # CLI flag: -server.http-tls-cert-path
  [cert_file: <string> | default = ""]

  # HTTP server key path.
  # CLI flag: -server.http-tls-key-path
  [key_file: <string> | default = ""]

  # HTTP TLS Client Auth type.
  # CLI flag: -server.http-tls-client-auth
  [client_auth_type: <string> | default = ""]

  # HTTP TLS Client CA path.
  # CLI flag: -server.http-tls-ca-path
  [client_ca_file: <string> | default = ""]

grpc_tls_config:
  # GRPC TLS server cert path.
  # CLI flag: -server.grpc-tls-cert-path
  [cert_file: <string> | default = ""]

  # GRPC TLS server key path.
  # CLI flag: -server.grpc-tls-key-path
  [key_file: <string> | default = ""]

  # GRPC TLS Client Auth type.
  # CLI flag: -server.grpc-tls-client-auth
  [client_auth_type: <string> | default = ""]

  # GRPC TLS Client CA path.
  # CLI flag: -server.grpc-tls-ca-path
  [client_ca_file: <string> | default = ""]

# Register the intrumentation handlers (/metrics etc).
# CLI flag: -server.register-instrumentation
[register_instrumentation: <boolean> | default = true]

# Timeout for graceful shutdowns
# CLI flag: -server.graceful-shutdown-timeout
[graceful_shutdown_timeout: <duration> | default = 30s]

# Read timeout for HTTP server
# CLI flag: -server.http-read-timeout
[http_server_read_timeout: <duration> | default = 30s]

# Write timeout for HTTP server
# CLI flag: -server.http-write-timeout
[http_server_write_timeout: <duration> | default = 30s]

# Idle timeout for HTTP server
# CLI flag: -server.http-idle-timeout
[http_server_idle_timeout: <duration> | default = 2m]

# Limit on the size of a gRPC message this server can receive (bytes).
# CLI flag: -server.grpc-max-recv-msg-size-bytes
[grpc_server_max_recv_msg_size: <int> | default = 4194304]

# Limit on the size of a gRPC message this server can send (bytes).
# CLI flag: -server.grpc-max-send-msg-size-bytes
[grpc_server_max_send_msg_size: <int> | default = 4194304]

# Limit on the number of concurrent streams for gRPC calls (0 = unlimited)
# CLI flag: -server.grpc-max-concurrent-streams
[grpc_server_max_concurrent_streams: <int> | default = 100]

# The duration after which an idle connection should be closed. Default:
# infinity
# CLI flag: -server.grpc.keepalive.max-connection-idle
[grpc_server_max_connection_idle: <duration> | default = 2562047h47m16.854775807s]

# The duration for the maximum amount of time a connection may exist before it
# will be closed. Default: infinity
# CLI flag: -server.grpc.keepalive.max-connection-age
[grpc_server_max_connection_age: <duration> | default = 2562047h47m16.854775807s]

# An additive period after max-connection-age after which the connection will be
# forcibly closed. Default: infinity
# CLI flag: -server.grpc.keepalive.max-connection-age-grace
[grpc_server_max_connection_age_grace: <duration> | default = 2562047h47m16.854775807s]

# Duration after which a keepalive probe is sent in case of no activity over the
# connection., Default: 2h
# CLI flag: -server.grpc.keepalive.time
[grpc_server_keepalive_time: <duration> | default = 2h]

# After having pinged for keepalive check, the duration after which an idle
# connection should be closed, Default: 20s
# CLI flag: -server.grpc.keepalive.timeout
[grpc_server_keepalive_timeout: <duration> | default = 20s]

# Minimum amount of time a client should wait before sending a keepalive ping.
# If client sends keepalive ping more often, server will send GOAWAY and close
# the connection.
# CLI flag: -server.grpc.keepalive.min-time-between-pings
[grpc_server_min_time_between_pings: <duration> | default = 10s]

# If true, server allows keepalive pings even when there are no active
# streams(RPCs). If false, and client sends ping when there are no active
# streams, server will send GOAWAY and close the connection.
# CLI flag: -server.grpc.keepalive.ping-without-stream-allowed
[grpc_server_ping_without_stream_allowed: <boolean> | default = true]

# Output log messages in the given format. Valid formats: [logfmt, json]
# CLI flag: -log.format
[log_format: <string> | default = "logfmt"]

# Only log messages with the given severity or above. Valid levels: [debug,
# info, warn, error]
# CLI flag: -log.level
[log_level: <string> | default = "info"]

# Optionally log the source IPs.
# CLI flag: -server.log-source-ips-enabled
[log_source_ips_enabled: <boolean> | default = false]

# Header field storing the source IPs. Only used if
# server.log-source-ips-enabled is true. If not set the default Forwarded,
# X-Real-IP and X-Forwarded-For headers are used
# CLI flag: -server.log-source-ips-header
[log_source_ips_header: <string> | default = ""]

# Regex for matching the source IPs. Only used if server.log-source-ips-enabled
# is true. If not set the default Forwarded, X-Real-IP and X-Forwarded-For
# headers are used
# CLI flag: -server.log-source-ips-regex
[log_source_ips_regex: <string> | default = ""]

# Optionally log requests at info level instead of debug level.
# CLI flag: -server.log-request-at-info-level-enabled
[log_request_at_info_level_enabled: <boolean> | default = false]

# Base path to serve all API routes from (e.g. /v1/)
# CLI flag: -server.path-prefix
[http_path_prefix: <string> | default = ""]

distributor

Configures the distributor.

ring:
  kvstore:
    # Backend storage to use for the ring. Supported values are: consul, etcd,
    # inmemory, memberlist, multi.
    # CLI flag: -distributor.ring.store
    [store: <string> | default = "consul"]

    # The prefix for the keys in the store. Should end with a /.
    # CLI flag: -distributor.ring.prefix
    [prefix: <string> | default = "collectors/"]

    # Configuration for a Consul client. Only applies if store is consul.
    # The CLI flags prefix for this block configuration is: distributor.ring
    [consul: <consul>]

    # Configuration for an ETCD v3 client. Only applies if store is etcd.
    # The CLI flags prefix for this block configuration is: distributor.ring
    [etcd: <etcd>]

    multi:
      # Primary backend storage used by multi-client.
      # CLI flag: -distributor.ring.multi.primary
      [primary: <string> | default = ""]

      # Secondary backend storage used by multi-client.
      # CLI flag: -distributor.ring.multi.secondary
      [secondary: <string> | default = ""]

      # Mirror writes to secondary store.
      # CLI flag: -distributor.ring.multi.mirror-enabled
      [mirror_enabled: <boolean> | default = false]

      # Timeout for storing value to secondary store.
      # CLI flag: -distributor.ring.multi.mirror-timeout
      [mirror_timeout: <duration> | default = 2s]

  # Period at which to heartbeat to the ring. 0 = disabled.
  # CLI flag: -distributor.ring.heartbeat-period
  [heartbeat_period: <duration> | default = 5s]

  # The heartbeat timeout after which distributors are considered unhealthy
  # within the ring. 0 = never (timeout disabled).
  # CLI flag: -distributor.ring.heartbeat-timeout
  [heartbeat_timeout: <duration> | default = 1m]

  # Name of network interface to read address from.
  # CLI flag: -distributor.ring.instance-interface-names
  [instance_interface_names: <list of strings> | default = [<private network interfaces>]]

rate_store:
  # The max number of concurrent requests to make to ingester stream apis
  # CLI flag: -distributor.rate-store.max-request-parallelism
  [max_request_parallelism: <int> | default = 200]

  # The interval on which distributors will update current stream rates from
  # ingesters
  # CLI flag: -distributor.rate-store.stream-rate-update-interval
  [stream_rate_update_interval: <duration> | default = 1s]

  # Timeout for communication between distributors and any given ingester when
  # updating rates
  # CLI flag: -distributor.rate-store.ingester-request-timeout
  [ingester_request_timeout: <duration> | default = 500ms]

querier

Configures the querier. Only appropriate when running all modules or just the querier.

# Maximum duration for which the live tailing requests are served.
# CLI flag: -querier.tail-max-duration
[tail_max_duration: <duration> | default = 1h]

# Time to wait before sending more than the minimum successful query requests.
# CLI flag: -querier.extra-query-delay
[extra_query_delay: <duration> | default = 0s]

# Maximum lookback beyond which queries are not sent to ingester. 0 means all
# queries are sent to ingester.
# CLI flag: -querier.query-ingesters-within
[query_ingesters_within: <duration> | default = 3h]

engine:
  # Deprecated: Use querier.query-timeout instead. Timeout for query execution.
  # CLI flag: -querier.engine.timeout
  [timeout: <duration> | default = 5m]

  # The maximum amount of time to look back for log lines. Used only for instant
  # log queries.
  # CLI flag: -querier.engine.max-lookback-period
  [max_look_back_period: <duration> | default = 30s]

# The maximum number of concurrent queries allowed.
# CLI flag: -querier.max-concurrent
[max_concurrent: <int> | default = 10]

# Only query the store, and not attempt any ingesters. This is useful for
# running a standalone querier pool operating only against stored data.
# CLI flag: -querier.query-store-only
[query_store_only: <boolean> | default = false]

# When true, queriers only query the ingesters, and not stored data. This is
# useful when the object store is unavailable.
# CLI flag: -querier.query-ingester-only
[query_ingester_only: <boolean> | default = false]

# When true, allow queries to span multiple tenants.
# CLI flag: -querier.multi-tenant-queries-enabled
[multi_tenant_queries_enabled: <boolean> | default = false]

query_scheduler

The query_scheduler block configures the Loki query scheduler. When configured it separates the tenant query queues from the query-frontend.

# Maximum number of outstanding requests per tenant per query-scheduler.
# In-flight requests above this limit will fail with HTTP response status code
# 429.
# CLI flag: -query-scheduler.max-outstanding-requests-per-tenant
[max_outstanding_requests_per_tenant: <int> | default = 100]

# If a querier disconnects without sending notification about graceful shutdown,
# the query-scheduler will keep the querier in the tenant's shard until the
# forget delay has passed. This feature is useful to reduce the blast radius
# when shuffle-sharding is enabled.
# CLI flag: -query-scheduler.querier-forget-delay
[querier_forget_delay: <duration> | default = 0s]

# This configures the gRPC client used to report errors back to the
# query-frontend.
# The CLI flags prefix for this block configuration is:
# query-scheduler.grpc-client-config
[grpc_client_config: <grpc_client>]

# Set to true to have the query schedulers create and place themselves in a
# ring. If no frontend_address or scheduler_address are present anywhere else in
# the configuration, Loki will toggle this value to true.
# CLI flag: -query-scheduler.use-scheduler-ring
[use_scheduler_ring: <boolean> | default = false]

# The hash ring configuration. This option is required only if
# use_scheduler_ring is true.
scheduler_ring:
  kvstore:
    # Backend storage to use for the ring. Supported values are: consul, etcd,
    # inmemory, memberlist, multi.
    # CLI flag: -query-scheduler.ring.store
    [store: <string> | default = "consul"]

    # The prefix for the keys in the store. Should end with a /.
    # CLI flag: -query-scheduler.ring.prefix
    [prefix: <string> | default = "collectors/"]

    # Configuration for a Consul client. Only applies if store is consul.
    # The CLI flags prefix for this block configuration is: query-scheduler.ring
    [consul: <consul>]

    # Configuration for an ETCD v3 client. Only applies if store is etcd.
    # The CLI flags prefix for this block configuration is: query-scheduler.ring
    [etcd: <etcd>]

    multi:
      # Primary backend storage used by multi-client.
      # CLI flag: -query-scheduler.ring.multi.primary
      [primary: <string> | default = ""]

      # Secondary backend storage used by multi-client.
      # CLI flag: -query-scheduler.ring.multi.secondary
      [secondary: <string> | default = ""]

      # Mirror writes to secondary store.
      # CLI flag: -query-scheduler.ring.multi.mirror-enabled
      [mirror_enabled: <boolean> | default = false]

      # Timeout for storing value to secondary store.
      # CLI flag: -query-scheduler.ring.multi.mirror-timeout
      [mirror_timeout: <duration> | default = 2s]

  # Period at which to heartbeat to the ring. 0 = disabled.
  # CLI flag: -query-scheduler.ring.heartbeat-period
  [heartbeat_period: <duration> | default = 15s]

  # The heartbeat timeout after which compactors are considered unhealthy within
  # the ring. 0 = never (timeout disabled).
  # CLI flag: -query-scheduler.ring.heartbeat-timeout
  [heartbeat_timeout: <duration> | default = 1m]

  # File path where tokens are stored. If empty, tokens are not stored at
  # shutdown and restored at startup.
  # CLI flag: -query-scheduler.ring.tokens-file-path
  [tokens_file_path: <string> | default = ""]

  # True to enable zone-awareness and replicate blocks across different
  # availability zones.
  # CLI flag: -query-scheduler.ring.zone-awareness-enabled
  [zone_awareness_enabled: <boolean> | default = false]

  # Instance ID to register in the ring.
  # CLI flag: -query-scheduler.ring.instance-id
  [instance_id: <string> | default = "<hostname>"]

  # Name of network interface to read address from.
  # CLI flag: -query-scheduler.ring.instance-interface-names
  [instance_interface_names: <list of strings> | default = [<private network interfaces>]]

  # Port to advertise in the ring (defaults to server.grpc-listen-port).
  # CLI flag: -query-scheduler.ring.instance-port
  [instance_port: <int> | default = 0]

  # IP address to advertise in the ring.
  # CLI flag: -query-scheduler.ring.instance-addr
  [instance_addr: <string> | default = ""]

  # The availability zone where this instance is running. Required if
  # zone-awareness is enabled.
  # CLI flag: -query-scheduler.ring.instance-availability-zone
  [instance_availability_zone: <string> | default = ""]

frontend

The frontend block configures the Loki query-frontend.

# Log queries that are slower than the specified duration. Set to 0 to disable.
# Set to < 0 to enable on all queries.
# CLI flag: -frontend.log-queries-longer-than
[log_queries_longer_than: <duration> | default = 0s]

# Max body size for downstream prometheus.
# CLI flag: -frontend.max-body-size
[max_body_size: <int> | default = 10485760]

# True to enable query statistics tracking. When enabled, a message with some
# statistics is logged for every query.
# CLI flag: -frontend.query-stats-enabled
[query_stats_enabled: <boolean> | default = false]

# Maximum number of outstanding requests per tenant per frontend; requests
# beyond this error with HTTP 429.
# CLI flag: -querier.max-outstanding-requests-per-tenant
[max_outstanding_per_tenant: <int> | default = 2048]

# In the event a tenant is repeatedly sending queries that lead the querier to
# crash or be killed due to an out-of-memory error, the crashed querier will be
# disconnected from the query frontend and a new querier will be immediately
# assigned to the tenant’s shard. This invalidates the assumption that shuffle
# sharding can be used to reduce the impact on tenants. This option mitigates
# the impact by configuring a delay between when a querier disconnects because
# of a crash and when the crashed querier is actually removed from the tenant's
# shard.
# CLI flag: -query-frontend.querier-forget-delay
[querier_forget_delay: <duration> | default = 0s]

# DNS hostname used for finding query-schedulers.
# CLI flag: -frontend.scheduler-address
[scheduler_address: <string> | default = ""]

# How often to resolve the scheduler-address, in order to look for new
# query-scheduler instances. Also used to determine how often to poll the
# scheduler-ring for addresses if the scheduler-ring is configured.
# CLI flag: -frontend.scheduler-dns-lookup-period
[scheduler_dns_lookup_period: <duration> | default = 10s]

# Number of concurrent workers forwarding queries to single query-scheduler.
# CLI flag: -frontend.scheduler-worker-concurrency
[scheduler_worker_concurrency: <int> | default = 5]

# The grpc_client block configures the gRPC client used to communicate between
# two Loki components.
# The CLI flags prefix for this block configuration is:
# frontend.grpc-client-config
[grpc_client_config: <grpc_client>]

# Time to wait for inflight requests to finish before forcefully shutting down.
# This needs to be aligned with the query timeout and the graceful termination
# period of the process orchestrator.
# CLI flag: -frontend.graceful-shutdown-timeout
[graceful_shutdown_timeout: <duration> | default = 5m]

# Name of network interface to read address from. This address is sent to
# query-scheduler and querier, which uses it to send the query response back to
# query-frontend.
# CLI flag: -frontend.instance-interface-names
[instance_interface_names: <list of strings> | default = [<private network interfaces>]]

# Compress HTTP responses.
# CLI flag: -querier.compress-http-responses
[compress_responses: <boolean> | default = false]

# URL of downstream Loki.
# CLI flag: -frontend.downstream-url
[downstream_url: <string> | default = ""]

# URL of querier for tail proxy.
# CLI flag: -frontend.tail-proxy-url
[tail_proxy_url: <string> | default = ""]

# The TLS configuration.
[tail_tls_config: <tls_config>]

query_range

The query_range block configures the query splitting and caching in the Loki query-frontend.

# Deprecated: Use -querier.split-queries-by-interval instead. CLI flag:
# -querier.split-queries-by-day. Split queries by day and execute in parallel.
[split_queries_by_interval: <duration>]

# Mutate incoming queries to align their start and end with their step.
# CLI flag: -querier.align-querier-with-step
[align_queries_with_step: <boolean> | default = false]

results_cache:
  # The cache block configures the cache backend.
  # The CLI flags prefix for this block configuration is: frontend
  [cache: <cache_config>]

  # Use compression in results cache. Supported values are: 'snappy' and ''
  # (disable compression).
  # CLI flag: -frontend.compression
  [compression: <string> | default = ""]

# Cache query results.
# CLI flag: -querier.cache-results
[cache_results: <boolean> | default = false]

# Maximum number of retries for a single request; beyond this, the downstream
# error is returned.
# CLI flag: -querier.max-retries-per-request
[max_retries: <int> | default = 5]

# Perform query parallelisations based on storage sharding configuration and
# query ASTs. This feature is supported only by the chunks storage engine.
# CLI flag: -querier.parallelise-shardable-queries
[parallelise_shardable_queries: <boolean> | default = true]

# List of headers forwarded by the query Frontend to downstream querier.
# CLI flag: -frontend.forward-headers-list
[forward_headers_list: <list of strings> | default = []]

ruler

The ruler block configures the Loki ruler.

# URL of alerts return path.
# CLI flag: -ruler.external.url
[external_url: <url>]

# Labels to add to all alerts.
[external_labels: <list of Labels>]

# The grpc_client block configures the gRPC client used to communicate between
# two Loki components.
# The CLI flags prefix for this block configuration is: ruler.client
[ruler_client: <grpc_client>]

# How frequently to evaluate rules.
# CLI flag: -ruler.evaluation-interval
[evaluation_interval: <duration> | default = 1m]

# How frequently to poll for rule changes.
# CLI flag: -ruler.poll-interval
[poll_interval: <duration> | default = 1m]

# Deprecated: Use -ruler-storage. CLI flags and their respective YAML config
# options instead.
storage:
  # Method to use for backend rule storage (configdb, azure, gcs, s3, swift,
  # local, bos)
  # CLI flag: -ruler.storage.type
  [type: <string> | default = ""]

  # Configures backend rule storage for Azure.
  # The CLI flags prefix for this block configuration is: ruler.storage
  [azure: <azure_storage_config>]

  # Configures backend rule storage for GCS.
  # The CLI flags prefix for this block configuration is: ruler.storage
  [gcs: <gcs_storage_config>]

  # Configures backend rule storage for S3.
  # The CLI flags prefix for this block configuration is: ruler
  [s3: <s3_storage_config>]

  # Configures backend rule storage for Baidu Object Storage (BOS).
  # The CLI flags prefix for this block configuration is: ruler.storage
  [bos: <bos_storage_config>]

  # Configures backend rule storage for Swift.
  # The CLI flags prefix for this block configuration is: ruler.storage
  [swift: <swift_storage_config>]

  # Configures backend rule storage for a local file system directory.
  local:
    # Directory to scan for rules
    # CLI flag: -ruler.storage.local.directory
    [directory: <string> | default = ""]

# File path to store temporary rule files.
# CLI flag: -ruler.rule-path
[rule_path: <string> | default = "/rules"]

# Comma-separated list of Alertmanager URLs to send notifications to. Each
# Alertmanager URL is treated as a separate group in the configuration. Multiple
# Alertmanagers in HA per group can be supported by using DNS resolution via
# '-ruler.alertmanager-discovery'.
# CLI flag: -ruler.alertmanager-url
[alertmanager_url: <string> | default = ""]

# Use DNS SRV records to discover Alertmanager hosts.
# CLI flag: -ruler.alertmanager-discovery
[enable_alertmanager_discovery: <boolean> | default = false]

# How long to wait between refreshing DNS resolutions of Alertmanager hosts.
# CLI flag: -ruler.alertmanager-refresh-interval
[alertmanager_refresh_interval: <duration> | default = 1m]

# If enabled requests to Alertmanager will utilize the V2 API.
# CLI flag: -ruler.alertmanager-use-v2
[enable_alertmanager_v2: <boolean> | default = false]

# List of alert relabel configs.
[alert_relabel_configs: <relabel_config...>]

# Capacity of the queue for notifications to be sent to the Alertmanager.
# CLI flag: -ruler.notification-queue-capacity
[notification_queue_capacity: <int> | default = 10000]

# HTTP timeout duration when sending notifications to the Alertmanager.
# CLI flag: -ruler.notification-timeout
[notification_timeout: <duration> | default = 10s]

alertmanager_client:
  # Path to the client certificate file, which will be used for authenticating
  # with the server. Also requires the key path to be configured.
  # CLI flag: -ruler.alertmanager-client.tls-cert-path
  [tls_cert_path: <string> | default = ""]

  # Path to the key file for the client certificate. Also requires the client
  # certificate to be configured.
  # CLI flag: -ruler.alertmanager-client.tls-key-path
  [tls_key_path: <string> | default = ""]

  # Path to the CA certificates file to validate server certificate against. If
  # not set, the host's root CA certificates are used.
  # CLI flag: -ruler.alertmanager-client.tls-ca-path
  [tls_ca_path: <string> | default = ""]

  # Override the expected name on the server certificate.
  # CLI flag: -ruler.alertmanager-client.tls-server-name
  [tls_server_name: <string> | default = ""]

  # Skip validating server certificate.
  # CLI flag: -ruler.alertmanager-client.tls-insecure-skip-verify
  [tls_insecure_skip_verify: <boolean> | default = false]

  # Override the default cipher suite list (separated by commas). Allowed
  # values:
  # 
  # Secure Ciphers:
  # - TLS_RSA_WITH_AES_128_CBC_SHA
  # - TLS_RSA_WITH_AES_256_CBC_SHA
  # - TLS_RSA_WITH_AES_128_GCM_SHA256
  # - TLS_RSA_WITH_AES_256_GCM_SHA384
  # - TLS_AES_128_GCM_SHA256
  # - TLS_AES_256_GCM_SHA384
  # - TLS_CHACHA20_POLY1305_SHA256
  # - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  # - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  # - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  # - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  # - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  # - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  # - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  # - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  # - TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
  # - TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
  # 
  # Insecure Ciphers:
  # - TLS_RSA_WITH_RC4_128_SHA
  # - TLS_RSA_WITH_3DES_EDE_CBC_SHA
  # - TLS_RSA_WITH_AES_128_CBC_SHA256
  # - TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
  # - TLS_ECDHE_RSA_WITH_RC4_128_SHA
  # - TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
  # - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  # - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  # CLI flag: -ruler.alertmanager-client.tls-cipher-suites
  [tls_cipher_suites: <string> | default = ""]

  # Override the default minimum TLS version. Allowed values: VersionTLS10,
  # VersionTLS11, VersionTLS12, VersionTLS13
  # CLI flag: -ruler.alertmanager-client.tls-min-version
  [tls_min_version: <string> | default = ""]

  # HTTP Basic authentication username. It overrides the username set in the URL
  # (if any).
  # CLI flag: -ruler.alertmanager-client.basic-auth-username
  [basic_auth_username: <string> | default = ""]

  # HTTP Basic authentication password. It overrides the password set in the URL
  # (if any).
  # CLI flag: -ruler.alertmanager-client.basic-auth-password
  [basic_auth_password: <string> | default = ""]

  # HTTP Header authorization type (default: Bearer).
  # CLI flag: -ruler.alertmanager-client.type
  [type: <string> | default = "Bearer"]

  # HTTP Header authorization credentials.
  # CLI flag: -ruler.alertmanager-client.credentials
  [credentials: <string> | default = ""]

  # HTTP Header authorization credentials file.
  # CLI flag: -ruler.alertmanager-client.credentials-file
  [credentials_file: <string> | default = ""]

# Max time to tolerate outage for restoring "for" state of alert.
# CLI flag: -ruler.for-outage-tolerance
[for_outage_tolerance: <duration> | default = 1h]

# Minimum duration between alert and restored "for" state. This is maintained
# only for alerts with configured "for" time greater than the grace period.
# CLI flag: -ruler.for-grace-period
[for_grace_period: <duration> | default = 10m]

# Minimum amount of time to wait before resending an alert to Alertmanager.
# CLI flag: -ruler.resend-delay
[resend_delay: <duration> | default = 1m]

# Distribute rule evaluation using ring backend.
# CLI flag: -ruler.enable-sharding
[enable_sharding: <boolean> | default = false]

# The sharding strategy to use. Supported values are: default, shuffle-sharding.
# CLI flag: -ruler.sharding-strategy
[sharding_strategy: <string> | default = "default"]

# The sharding algorithm to use for deciding how rules & groups are sharded.
# Supported values are: by-group, by-rule.
# CLI flag: -ruler.sharding-algo
[sharding_algo: <string> | default = "by-group"]

# Time to spend searching for a pending ruler when shutting down.
# CLI flag: -ruler.search-pending-for
[search_pending_for: <duration> | default = 5m]

# Ring used by Loki ruler. The CLI flags prefix for this block configuration is
# 'ruler.ring'.
ring:
  kvstore:
    # Backend storage to use for the ring. Supported values are: consul, etcd,
    # inmemory, memberlist, multi.
    # CLI flag: -ruler.ring.store
    [store: <string> | default = "consul"]

    # The prefix for the keys in the store. Should end with a /.
    # CLI flag: -ruler.ring.prefix
    [prefix: <string> | default = "rulers/"]

    # Configuration for a Consul client. Only applies if store is consul.
    # The CLI flags prefix for this block configuration is: ruler.ring
    [consul: <consul>]

    # Configuration for an ETCD v3 client. Only applies if store is etcd.
    # The CLI flags prefix for this block configuration is: ruler.ring
    [etcd: <etcd>]

    multi:
      # Primary backend storage used by multi-client.
      # CLI flag: -ruler.ring.multi.primary
      [primary: <string> | default = ""]

      # Secondary backend storage used by multi-client.
      # CLI flag: -ruler.ring.multi.secondary
      [secondary: <string> | default = ""]

      # Mirror writes to secondary store.
      # CLI flag: -ruler.ring.multi.mirror-enabled
      [mirror_enabled: <boolean> | default = false]

      # Timeout for storing value to secondary store.
      # CLI flag: -ruler.ring.multi.mirror-timeout
      [mirror_timeout: <duration> | default = 2s]

  # Interval between heartbeats sent to the ring. 0 = disabled.
  # CLI flag: -ruler.ring.heartbeat-period
  [heartbeat_period: <duration> | default = 5s]

  # The heartbeat timeout after which ruler ring members are considered
  # unhealthy within the ring. 0 = never (timeout disabled).
  # CLI flag: -ruler.ring.heartbeat-timeout
  [heartbeat_timeout: <duration> | default = 1m]

  # Name of network interface to read addresses from.
  # CLI flag: -ruler.ring.instance-interface-names
  [instance_interface_names: <list of strings> | default = [<private network interfaces>]]

  # The number of tokens the lifecycler will generate and put into the ring if
  # it joined without transferring tokens from another lifecycler.
  # CLI flag: -ruler.ring.num-tokens
  [num_tokens: <int> | default = 128]

# Period with which to attempt to flush rule groups.
# CLI flag: -ruler.flush-period
[flush_period: <duration> | default = 1m]

# Enable the ruler API.
# CLI flag: -ruler.enable-api
[enable_api: <boolean> | default = true]

# Comma separated list of tenants whose rules this ruler can evaluate. If
# specified, only these tenants will be handled by ruler, otherwise this ruler
# can process rules from all tenants. Subject to sharding.
# CLI flag: -ruler.enabled-tenants
[enabled_tenants: <string> | default = ""]

# Comma separated list of tenants whose rules this ruler cannot evaluate. If
# specified, a ruler that would normally pick the specified tenant(s) for
# processing will ignore them instead. Subject to sharding.
# CLI flag: -ruler.disabled-tenants
[disabled_tenants: <string> | default = ""]

# Report the wall time for ruler queries to complete as a per user metric and as
# an info level log message.
# CLI flag: -ruler.query-stats-enabled
[query_stats_enabled: <boolean> | default = false]

# Disable the rule_group label on exported metrics.
# CLI flag: -ruler.disable-rule-group-label
[disable_rule_group_label: <boolean> | default = false]

wal:
  # The directory in which to write tenant WAL files. Each tenant will have its
  # own directory one level below this directory.
  # CLI flag: -ruler.wal.dir
  [dir: <string> | default = "ruler-wal"]

  # Frequency with which to run the WAL truncation process.
  # CLI flag: -ruler.wal.truncate-frequency
  [truncate_frequency: <duration> | default = 1h]

  # Minimum age that samples must exist in the WAL before being truncated.
  # CLI flag: -ruler.wal.min-age
  [min_age: <duration> | default = 5m]

  # Maximum age that samples must exist in the WAL before being truncated.
  # CLI flag: -ruler.wal.max-age
  [max_age: <duration> | default = 4h]

wal_cleaner:
  # The minimum age of a WAL to consider for cleaning.
  # CLI flag: -ruler.wal-cleaner.min-age
  [min_age: <duration> | default = 12h]

  # Deprecated: CLI flag -ruler.wal-cleaer.period.
  # Use -ruler.wal-cleaner.period instead.
  # 
  # How often to run the WAL cleaner. 0 = disabled.
  # CLI flag: -ruler.wal-cleaner.period
  [period: <duration> | default = 0s]

# Remote-write configuration to send rule samples to a Prometheus remote-write
# endpoint.
remote_write:
  # Deprecated: Use 'clients' instead. Configure remote write client.
  [client: <RemoteWriteConfig>]

  # Configure remote write clients. A map with remote client id as key.
  [clients: <map of string to RemoteWriteConfig>]

  # Enable remote-write functionality.
  # CLI flag: -ruler.remote-write.enabled
  [enabled: <boolean> | default = false]

  # Minimum period to wait between refreshing remote-write reconfigurations.
  # This should be greater than or equivalent to
  # -limits.per-user-override-period.
  # CLI flag: -ruler.remote-write.config-refresh-period
  [config_refresh_period: <duration> | default = 10s]

ingester_client

The ingester_client block configures how the distributor will connect to ingesters. Only appropriate when running all components, the distributor, or the querier.

# Configures how connections are pooled.
pool_config:
  # How frequently to clean up clients for ingesters that have gone away.
  # CLI flag: -distributor.client-cleanup-period
  [client_cleanup_period: <duration> | default = 15s]

  # Run a health check on each ingester client during periodic cleanup.
  # CLI flag: -distributor.health-check-ingesters
  [health_check_ingesters: <boolean> | default = true]

  # How quickly a dead client will be removed after it has been detected to
  # disappear. Set this to a value to allow time for a secondary health check to
  # recover the missing client.
  # CLI flag: -ingester.client.healthcheck-timeout
  [remote_timeout: <duration> | default = 1s]

# The remote request timeout on the client side.
# CLI flag: -ingester.client.timeout
[remote_timeout: <duration> | default = 5s]

# Configures how the gRPC connection to ingesters work as a client.
# The CLI flags prefix for this block configuration is: ingester.client
[grpc_client_config: <grpc_client>]

ingester

The ingester block configures the ingester and how the ingester will register itself to a key value store.

# Configures how the lifecycle of the ingester will operate and where it will
# register for discovery.
lifecycler:
  ring:
    kvstore:
      # Backend storage to use for the ring. Supported values are: consul, etcd,
      # inmemory, memberlist, multi.
      # CLI flag: -ring.store
      [store: <string> | default = "consul"]

      # The prefix for the keys in the store. Should end with a /.
      # CLI flag: -ring.prefix
      [prefix: <string> | default = "collectors/"]

      # Configuration for a Consul client. Only applies if store is consul.
      [consul: <consul>]

      # Configuration for an ETCD v3 client. Only applies if store is etcd.
      [etcd: <etcd>]

      multi:
        # Primary backend storage used by multi-client.
        # CLI flag: -multi.primary
        [primary: <string> | default = ""]

        # Secondary backend storage used by multi-client.
        # CLI flag: -multi.secondary
        [secondary: <string> | default = ""]

        # Mirror writes to secondary store.
        # CLI flag: -multi.mirror-enabled
        [mirror_enabled: <boolean> | default = false]

        # Timeout for storing value to secondary store.
        # CLI flag: -multi.mirror-timeout
        [mirror_timeout: <duration> | default = 2s]

    # The heartbeat timeout after which ingesters are skipped for reads/writes.
    # 0 = never (timeout disabled).
    # CLI flag: -ring.heartbeat-timeout
    [heartbeat_timeout: <duration> | default = 1m]

    # The number of ingesters to write to and read from.
    # CLI flag: -distributor.replication-factor
    [replication_factor: <int> | default = 3]

    # True to enable the zone-awareness and replicate ingested samples across
    # different availability zones.
    # CLI flag: -distributor.zone-awareness-enabled
    [zone_awareness_enabled: <boolean> | default = false]

    # Comma-separated list of zones to exclude from the ring. Instances in
    # excluded zones will be filtered out from the ring.
    # CLI flag: -distributor.excluded-zones
    [excluded_zones: <string> | default = ""]

  # Number of tokens for each ingester.
  # CLI flag: -ingester.num-tokens
  [num_tokens: <int> | default = 128]

  # Period at which to heartbeat to consul. 0 = disabled.
  # CLI flag: -ingester.heartbeat-period
  [heartbeat_period: <duration> | default = 5s]

  # Heartbeat timeout after which instance is assumed to be unhealthy. 0 =
  # disabled.
  # CLI flag: -ingester.heartbeat-timeout
  [heartbeat_timeout: <duration> | default = 1m]

  # Observe tokens after generating to resolve collisions. Useful when using
  # gossiping ring.
  # CLI flag: -ingester.observe-period
  [observe_period: <duration> | default = 0s]

  # Period to wait for a claim from another member; will join automatically
  # after this.
  # CLI flag: -ingester.join-after
  [join_after: <duration> | default = 0s]

  # Minimum duration to wait after the internal readiness checks have passed but
  # before succeeding the readiness endpoint. This is used to slowdown
  # deployment controllers (eg. Kubernetes) after an instance is ready and
  # before they proceed with a rolling update, to give the rest of the cluster
  # instances enough time to receive ring updates.
  # CLI flag: -ingester.min-ready-duration
  [min_ready_duration: <duration> | default = 15s]

  # Name of network interface to read address from.
  # CLI flag: -ingester.lifecycler.interface
  [interface_names: <list of strings> | default = [<private network interfaces>]]

  # Duration to sleep for before exiting, to ensure metrics are scraped.
  # CLI flag: -ingester.final-sleep
  [final_sleep: <duration> | default = 0s]

  # File path where tokens are stored. If empty, tokens are not stored at
  # shutdown and restored at startup.
  # CLI flag: -ingester.tokens-file-path
  [tokens_file_path: <string> | default = ""]

  # The availability zone where this instance is running.
  # CLI flag: -ingester.availability-zone
  [availability_zone: <string> | default = ""]

  # Unregister from the ring upon clean shutdown. It can be useful to disable
  # for rolling restarts with consistent naming in conjunction with
  # -distributor.extend-writes=false.
  # CLI flag: -ingester.unregister-on-shutdown
  [unregister_on_shutdown: <boolean> | default = true]

  # When enabled the readiness probe succeeds only after all instances are
  # ACTIVE and healthy in the ring, otherwise only the instance itself is
  # checked. This option should be disabled if in your cluster multiple
  # instances can be rolled out simultaneously, otherwise rolling updates may be
  # slowed down.
  # CLI flag: -ingester.readiness-check-ring-health
  [readiness_check_ring_health: <boolean> | default = true]

  # IP address to advertise in the ring.
  # CLI flag: -ingester.lifecycler.addr
  [address: <string> | default = ""]

  # port to advertise in consul (defaults to server.grpc-listen-port).
  # CLI flag: -ingester.lifecycler.port
  [port: <int> | default = 0]

  # ID to register in the ring.
  # CLI flag: -ingester.lifecycler.ID
  [id: <string> | default = "<hostname>"]

# Number of times to try and transfer chunks before falling back to flushing. If
# set to 0 or negative value, transfers are disabled.
# CLI flag: -ingester.max-transfer-retries
[max_transfer_retries: <int> | default = 0]

# How many flushes can happen concurrently from each stream.
# CLI flag: -ingester.concurrent-flushes
[concurrent_flushes: <int> | default = 32]

# How often should the ingester see if there are any blocks to flush.
# CLI flag: -ingester.flush-check-period
[flush_check_period: <duration> | default = 30s]

# The timeout before a flush is cancelled.
# CLI flag: -ingester.flush-op-timeout
[flush_op_timeout: <duration> | default = 10m]

# How long chunks should be retained in-memory after they've been flushed.
# CLI flag: -ingester.chunks-retain-period
[chunk_retain_period: <duration> | default = 0s]

# How long chunks should sit in-memory with no updates before being flushed if
# they don't hit the max block size. This means that half-empty chunks will
# still be flushed after a certain period as long as they receive no further
# activity.
# CLI flag: -ingester.chunks-idle-period
[chunk_idle_period: <duration> | default = 30m]

# The targeted _uncompressed_ size in bytes of a chunk block When this threshold
# is exceeded the head block will be cut and compressed inside the chunk.
# CLI flag: -ingester.chunks-block-size
[chunk_block_size: <int> | default = 262144]

# A target _compressed_ size in bytes for chunks. This is a desired size not an
# exact size, chunks may be slightly bigger or significantly smaller if they get
# flushed for other reasons (e.g. chunk_idle_period). A value of 0 creates
# chunks with a fixed 10 blocks, a non zero value will create chunks with a
# variable number of blocks to meet the target size.
# CLI flag: -ingester.chunk-target-size
[chunk_target_size: <int> | default = 1572864]

# The algorithm to use for compressing chunk. (none, gzip, lz4-64k, snappy,
# lz4-256k, lz4-1M, lz4, flate, zstd)
# CLI flag: -ingester.chunk-encoding
[chunk_encoding: <string> | default = "gzip"]

# The maximum duration of a timeseries chunk in memory. If a timeseries runs for
# longer than this, the current chunk will be flushed to the store and a new
# chunk created.
# CLI flag: -ingester.max-chunk-age
[max_chunk_age: <duration> | default = 2h]

# Forget about ingesters having heartbeat timestamps older than
# `ring.kvstore.heartbeat_timeout`. This is equivalent to clicking on the
# `/ring` `forget` button in the UI: the ingester is removed from the ring. This
# is a useful setting when you are sure that an unhealthy node won't return. An
# example is when not using stateful sets or the equivalent. Use
# `memberlist.rejoin_interval` > 0 to handle network partition cases when using
# a memberlist.
# CLI flag: -ingester.autoforget-unhealthy
[autoforget_unhealthy: <boolean> | default = false]

# Parameters used to synchronize ingesters to cut chunks at the same moment.
# Sync period is used to roll over incoming entry to a new chunk. If chunk's
# utilization isn't high enough (eg. less than 50% when sync_min_utilization is
# set to 0.5), then this chunk rollover doesn't happen.
# CLI flag: -ingester.sync-period
[sync_period: <duration> | default = 0s]

# Minimum utilization of chunk when doing synchronization.
# CLI flag: -ingester.sync-min-utilization
[sync_min_utilization: <float> | default = 0]

# The maximum number of errors a stream will report to the user when a push
# fails. 0 to make unlimited.
# CLI flag: -ingester.max-ignored-stream-errors
[max_returned_stream_errors: <int> | default = 10]

# How far back should an ingester be allowed to query the store for data, for
# use only with boltdb-shipper/tsdb index and filesystem object store. -1 for
# infinite.
# CLI flag: -ingester.query-store-max-look-back-period
[query_store_max_look_back_period: <duration> | default = 0s]

# The ingester WAL (Write Ahead Log) records incoming logs and stores them on
# the local file systems in order to guarantee persistence of acknowledged data
# in the event of a process crash.
wal:
  # Enable writing of ingested data into WAL.
  # CLI flag: -ingester.wal-enabled
  [enabled: <boolean> | default = true]

  # Directory where the WAL data is stored and/or recovered from.
  # CLI flag: -ingester.wal-dir
  [dir: <string> | default = "wal"]

  # Interval at which checkpoints should be created.
  # CLI flag: -ingester.checkpoint-duration
  [checkpoint_duration: <duration> | default = 5m]

  # When WAL is enabled, should chunks be flushed to long-term storage on
  # shutdown.
  # CLI flag: -ingester.flush-on-shutdown
  [flush_on_shutdown: <boolean> | default = false]

  # Maximum memory size the WAL may use during replay. After hitting this, it
  # will flush data to storage before continuing. A unit suffix (KB, MB, GB) may
  # be applied.
  # CLI flag: -ingester.wal-replay-memory-ceiling
  [replay_memory_ceiling: <int> | default = 4GB]

# Shard factor used in the ingesters for the in process reverse index. This MUST
# be evenly divisible by ALL schema shard factors or Loki will not start.
# CLI flag: -ingester.index-shards
[index_shards: <int> | default = 32]

# Maximum number of dropped streams to keep in memory during tailing.
# CLI flag: -ingester.tailer.max-dropped-streams
[max_dropped_streams: <int> | default = 10]

index_gateway

The index_gateway block configures the Loki index gateway server, responsible for serving index queries without the need to constantly interact with the object store.

# Defines in which mode the index gateway server will operate (default to
# 'simple'). It supports two modes:
# - 'simple': an index gateway server instance is responsible for handling,
# storing and returning requests for all indices for all tenants.
# - 'ring': an index gateway server instance is responsible for a subset of
# tenants instead of all tenants.
# CLI flag: -index-gateway.mode
[mode: <string> | default = "simple"]

# Defines the ring to be used by the index gateway servers and clients in case
# the servers are configured to run in 'ring' mode. In case this isn't
# configured, this block supports inheriting configuration from the common ring
# section.
ring:
  kvstore:
    # Backend storage to use for the ring. Supported values are: consul, etcd,
    # inmemory, memberlist, multi.
    # CLI flag: -index-gateway.ring.store
    [store: <string> | default = "consul"]

    # The prefix for the keys in the store. Should end with a /.
    # CLI flag: -index-gateway.ring.prefix
    [prefix: <string> | default = "collectors/"]

    # Configuration for a Consul client. Only applies if store is consul.
    # The CLI flags prefix for this block configuration is: index-gateway.ring
    [consul: <consul>]

    # Configuration for an ETCD v3 client. Only applies if store is etcd.
    # The CLI flags prefix for this block configuration is: index-gateway.ring
    [etcd: <etcd>]

    multi:
      # Primary backend storage used by multi-client.
      # CLI flag: -index-gateway.ring.multi.primary
      [primary: <string> | default = ""]

      # Secondary backend storage used by multi-client.
      # CLI flag: -index-gateway.ring.multi.secondary
      [secondary: <string> | default = ""]

      # Mirror writes to secondary store.
      # CLI flag: -index-gateway.ring.multi.mirror-enabled
      [mirror_enabled: <boolean> | default = false]

      # Timeout for storing value to secondary store.
      # CLI flag: -index-gateway.ring.multi.mirror-timeout
      [mirror_timeout: <duration> | default = 2s]

  # Period at which to heartbeat to the ring. 0 = disabled.
  # CLI flag: -index-gateway.ring.heartbeat-period
  [heartbeat_period: <duration> | default = 15s]

  # The heartbeat timeout after which compactors are considered unhealthy within
  # the ring. 0 = never (timeout disabled).
  # CLI flag: -index-gateway.ring.heartbeat-timeout
  [heartbeat_timeout: <duration> | default = 1m]

  # File path where tokens are stored. If empty, tokens are not stored at
  # shutdown and restored at startup.
  # CLI flag: -index-gateway.ring.tokens-file-path
  [tokens_file_path: <string> | default = ""]

  # True to enable zone-awareness and replicate blocks across different
  # availability zones.
  # CLI flag: -index-gateway.ring.zone-awareness-enabled
  [zone_awareness_enabled: <boolean> | default = false]

  # Instance ID to register in the ring.
  # CLI flag: -index-gateway.ring.instance-id
  [instance_id: <string> | default = "<hostname>"]

  # Name of network interface to read address from.
  # CLI flag: -index-gateway.ring.instance-interface-names
  [instance_interface_names: <list of strings> | default = [<private network interfaces>]]

  # Port to advertise in the ring (defaults to server.grpc-listen-port).
  # CLI flag: -index-gateway.ring.instance-port
  [instance_port: <int> | default = 0]

  # IP address to advertise in the ring.
  # CLI flag: -index-gateway.ring.instance-addr
  [instance_addr: <string> | default = ""]

  # The availability zone where this instance is running. Required if
  # zone-awareness is enabled.
  # CLI flag: -index-gateway.ring.instance-availability-zone
  [instance_availability_zone: <string> | default = ""]

  # How many index gateway instances are assigned to each tenant.
  # CLI flag: -replication-factor
  [replication_factor: <int> | default = 3]

storage_config

The storage_config block configures one of many possible stores for both the index and chunks. Which configuration to be picked should be defined in schema_config block.

# The aws_storage_config block configures the connection to dynamoDB and S3
# object storage. Either one of them or both can be configured.
[aws: <aws_storage_config>]

# The azure_storage_config block configures the connection to Azure object
# storage backend.
[azure: <azure_storage_config>]

# The bos_storage_config block configures the connection to Baidu Object Storage
# (BOS) object storage backend.
[bos: <bos_storage_config>]

# Configures storing indexes in Bigtable. Required fields only required when
# bigtable is defined in config.
bigtable:
  # Bigtable project ID.
  # CLI flag: -bigtable.project
  [project: <string> | default = ""]

  # Bigtable instance ID. Please refer to
  # https://cloud.google.com/docs/authentication/production for more information
  # about how to configure authentication.
  # CLI flag: -bigtable.instance
  [instance: <string> | default = ""]

  # The grpc_client block configures the gRPC client used to communicate between
  # two Loki components.
  # The CLI flags prefix for this block configuration is: bigtable
  [grpc_client_config: <grpc_client>]

  # If enabled, once a tables info is fetched, it is cached.
  # CLI flag: -bigtable.table-cache.enabled
  [table_cache_enabled: <boolean> | default = true]

  # Duration to cache tables before checking again.
  # CLI flag: -bigtable.table-cache.expiration
  [table_cache_expiration: <duration> | default = 30m]

# Configures storing chunks in GCS. Required fields only required when gcs is
# defined in config.
[gcs: <gcs_storage_config>]

# Configures storing chunks and/or the index in Cassandra.
cassandra:
  # Comma-separated hostnames or IPs of Cassandra instances.
  # CLI flag: -cassandra.addresses
  [addresses: <string> | default = ""]

  # Port that Cassandra is running on
  # CLI flag: -cassandra.port
  [port: <int> | default = 9042]

  # Keyspace to use in Cassandra.
  # CLI flag: -cassandra.keyspace
  [keyspace: <string> | default = ""]

  # Consistency level for Cassandra.
  # CLI flag: -cassandra.consistency
  [consistency: <string> | default = "QUORUM"]

  # Replication factor to use in Cassandra.
  # CLI flag: -cassandra.replication-factor
  [replication_factor: <int> | default = 3]

  # Instruct the cassandra driver to not attempt to get host info from the
  # system.peers table.
  # CLI flag: -cassandra.disable-initial-host-lookup
  [disable_initial_host_lookup: <boolean> | default = false]

  # Use SSL when connecting to cassandra instances.
  # CLI flag: -cassandra.ssl
  [SSL: <boolean> | default = false]

  # Require SSL certificate validation.
  # CLI flag: -cassandra.host-verification
  [host_verification: <boolean> | default = true]

  # Policy for selecting Cassandra host. Supported values are: round-robin,
  # token-aware.
  # CLI flag: -cassandra.host-selection-policy
  [host_selection_policy: <string> | default = "round-robin"]

  # Path to certificate file to verify the peer.
  # CLI flag: -cassandra.ca-path
  [CA_path: <string> | default = ""]

  # Path to certificate file used by TLS.
  # CLI flag: -cassandra.tls-cert-path
  [tls_cert_path: <string> | default = ""]

  # Path to private key file used by TLS.
  # CLI flag: -cassandra.tls-key-path
  [tls_key_path: <string> | default = ""]

  # Enable password authentication when connecting to cassandra.
  # CLI flag: -cassandra.auth
  [auth: <boolean> | default = false]

  # Username to use when connecting to cassandra.
  # CLI flag: -cassandra.username
  [username: <string> | default = ""]

  # Password to use when connecting to cassandra.
  # CLI flag: -cassandra.password
  [password: <string> | default = ""]

  # File containing password to use when connecting to cassandra.
  # CLI flag: -cassandra.password-file
  [password_file: <string> | default = ""]

  # If set, when authenticating with cassandra a custom authenticator will be
  # expected during the handshake. This flag can be set multiple times.
  # CLI flag: -cassandra.custom-authenticator
  [custom_authenticators: <list of strings> | default = []]

  # Timeout when connecting to cassandra.
  # CLI flag: -cassandra.timeout
  [timeout: <duration> | default = 2s]

  # Initial connection timeout, used during initial dial to server.
  # CLI flag: -cassandra.connect-timeout
  [connect_timeout: <duration> | default = 5s]

  # Interval to retry connecting to cassandra nodes marked as DOWN.
  # CLI flag: -cassandra.reconnent-interval
  [reconnect_interval: <duration> | default = 1s]

  # Number of retries to perform on a request. Set to 0 to disable retries.
  # CLI flag: -cassandra.max-retries
  [max_retries: <int> | default = 0]

  # Maximum time to wait before retrying a failed request.
  # CLI flag: -cassandra.retry-max-backoff
  [retry_max_backoff: <duration> | default = 10s]

  # Minimum time to wait before retrying a failed request.
  # CLI flag: -cassandra.retry-min-backoff
  [retry_min_backoff: <duration> | default = 100ms]

  # Limit number of concurrent queries to Cassandra. Set to 0 to disable the
  # limit.
  # CLI flag: -cassandra.query-concurrency
  [query_concurrency: <int> | default = 0]

  # Number of TCP connections per host.
  # CLI flag: -cassandra.num-connections
  [num_connections: <int> | default = 2]

  # Convict hosts of being down on failure.
  # CLI flag: -cassandra.convict-hosts-on-failure
  [convict_hosts_on_failure: <boolean> | default = true]

  # Table options used to create index or chunk tables. This value is used as
  # plain text in the table `WITH` like this, "CREATE TABLE
  # <generated_by_cortex> (...) WITH <cassandra.table-options>". For details,
  # see https://cortexmetrics.io/docs/production/cassandra. By default it will
  # use the default table options of your Cassandra cluster.
  # CLI flag: -cassandra.table-options
  [table_options: <string> | default = ""]

# Configures storing index in BoltDB. Required fields only required when boltdb
# is present in the configuration.
boltdb:
  # Location of BoltDB index files.
  # CLI flag: -boltdb.dir
  [directory: <string> | default = ""]

# Configures storing the chunks on the local file system. Required fields only
# required when filesystem is present in the configuration.
[filesystem: <local_storage_config>]

# The swift_storage_config block configures the connection to OpenStack Object
# Storage (Swift) object storage backend.
[swift: <swift_storage_config>]

grpc_store:
  # Hostname or IP of the gRPC store instance.
  # CLI flag: -grpc-store.server-address
  [server_address: <string> | default = ""]

hedging:
  # If set to a non-zero value a second request will be issued at the provided
  # duration. Default is 0 (disabled)
  # CLI flag: -store.hedge-requests-at
  [at: <duration> | default = 0s]

  # The maximum of hedge requests allowed.
  # CLI flag: -store.hedge-requests-up-to
  [up_to: <int> | default = 2]

  # The maximum of hedge requests allowed per seconds.
  # CLI flag: -store.hedge-max-per-second
  [max_per_second: <int> | default = 5]

# Configures additional object stores for a given storage provider.
# Supported stores: aws, azure, bos, filesystem, gcs, swift.
# Example:
# storage_config:
#   named_stores:
#     aws:
#       store-1:
#         endpoint: s3://foo-bucket
#         region: us-west1
# Named store from this example can be used by setting object_store to store-1
# in period_config.
[named_stores: <named_stores_config>]

# Cache validity for active index entries. Should be no higher than
# -ingester.max-chunk-idle.
# CLI flag: -store.index-cache-validity
[index_cache_validity: <duration> | default = 5m]

# The cache block configures the cache backend.
# The CLI flags prefix for this block configuration is: store.index-cache-read
[index_queries_cache_config: <cache_config>]

# Disable broad index queries which results in reduced cache usage and faster
# query performance at the expense of somewhat higher QPS on the index store.
# CLI flag: -store.disable-broad-index-queries
[disable_broad_index_queries: <boolean> | default = false]

# Maximum number of parallel chunk reads.
# CLI flag: -store.max-parallel-get-chunk
[max_parallel_get_chunk: <int> | default = 150]

# The maximum number of chunks to fetch per batch.
# CLI flag: -store.max-chunk-batch-size
[max_chunk_batch_size: <int> | default = 50]

# Configures storing index in an Object Store (GCS/S3/Azure/Swift/Filesystem) in
# the form of boltdb files. Required fields only required when boltdb-shipper is
# defined in config.
boltdb_shipper:
  # Directory where ingesters would write index files which would then be
  # uploaded by shipper to configured storage
  # CLI flag: -boltdb.shipper.active-index-directory
  [active_index_directory: <string> | default = ""]

  # Shared store for keeping index files. Supported types: gcs, s3, azure,
  # filesystem
  # CLI flag: -boltdb.shipper.shared-store
  [shared_store: <string> | default = ""]

  # Prefix to add to Object Keys in Shared store. Path separator(if any) should
  # always be a '/'. Prefix should never start with a separator but should
  # always end with it
  # CLI flag: -boltdb.shipper.shared-store.key-prefix
  [shared_store_key_prefix: <string> | default = "index/"]

  # Cache location for restoring index files from storage for queries
  # CLI flag: -boltdb.shipper.cache-location
  [cache_location: <string> | default = ""]

  # TTL for index files restored in cache for queries
  # CLI flag: -boltdb.shipper.cache-ttl
  [cache_ttl: <duration> | default = 24h]

  # Resync downloaded files with the storage
  # CLI flag: -boltdb.shipper.resync-interval
  [resync_interval: <duration> | default = 5m]

  # Number of days of common index to be kept downloaded for queries. For per
  # tenant index query readiness, use limits overrides config.
  # CLI flag: -boltdb.shipper.query-ready-num-days
  [query_ready_num_days: <int> | default = 0]

  index_gateway_client:
    # The grpc_client block configures the gRPC client used to communicate
    # between two Loki components.
    # The CLI flags prefix for this block configuration is:
    # boltdb.shipper.index-gateway-client.grpc
    [grpc_client_config: <grpc_client>]

    # Hostname or IP of the Index Gateway gRPC server running in simple mode.
    # CLI flag: -boltdb.shipper.index-gateway-client.server-address
    [server_address: <string> | default = ""]

    # Whether requests sent to the gateway should be logged or not.
    # CLI flag: -boltdb.shipper.index-gateway-client.log-gateway-requests
    [log_gateway_requests: <boolean> | default = false]

  # Use boltdb-shipper index store as backup for indexing chunks. When enabled,
  # boltdb-shipper needs to be configured under storage_config
  # CLI flag: -boltdb.shipper.use-boltdb-shipper-as-backup
  [use_boltdb_shipper_as_backup: <boolean> | default = false]

  [ingestername: <string> | default = ""]

  [mode: <string> | default = ""]

  [ingesterdbretainperiod: <duration>]

  # Build per tenant index files
  # CLI flag: -boltdb.shipper.build-per-tenant-index
  [build_per_tenant_index: <boolean> | default = false]

tsdb_shipper:
  # Directory where ingesters would write index files which would then be
  # uploaded by shipper to configured storage
  # CLI flag: -tsdb.shipper.active-index-directory
  [active_index_directory: <string> | default = ""]

  # Shared store for keeping index files. Supported types: gcs, s3, azure,
  # filesystem
  # CLI flag: -tsdb.shipper.shared-store
  [shared_store: <string> | default = ""]

  # Prefix to add to Object Keys in Shared store. Path separator(if any) should
  # always be a '/'. Prefix should never start with a separator but should
  # always end with it
  # CLI flag: -tsdb.shipper.shared-store.key-prefix
  [shared_store_key_prefix: <string> | default = "index/"]

  # Cache location for restoring index files from storage for queries
  # CLI flag: -tsdb.shipper.cache-location
  [cache_location: <string> | default = ""]

  # TTL for index files restored in cache for queries
  # CLI flag: -tsdb.shipper.cache-ttl
  [cache_ttl: <duration> | default = 24h]

  # Resync downloaded files with the storage
  # CLI flag: -tsdb.shipper.resync-interval
  [resync_interval: <duration> | default = 5m]

  # Number of days of common index to be kept downloaded for queries. For per
  # tenant index query readiness, use limits overrides config.
  # CLI flag: -tsdb.shipper.query-ready-num-days
  [query_ready_num_days: <int> | default = 0]

  index_gateway_client:
    # The grpc_client block configures the gRPC client used to communicate
    # between two Loki components.
    # The CLI flags prefix for this block configuration is:
    # tsdb.shipper.index-gateway-client.grpc
    [grpc_client_config: <grpc_client>]

    # Hostname or IP of the Index Gateway gRPC server running in simple mode.
    # CLI flag: -tsdb.shipper.index-gateway-client.server-address
    [server_address: <string> | default = ""]

    # Whether requests sent to the gateway should be logged or not.
    # CLI flag: -tsdb.shipper.index-gateway-client.log-gateway-requests
    [log_gateway_requests: <boolean> | default = false]

  # Use boltdb-shipper index store as backup for indexing chunks. When enabled,
  # boltdb-shipper needs to be configured under storage_config
  # CLI flag: -tsdb.shipper.use-boltdb-shipper-as-backup
  [use_boltdb_shipper_as_backup: <boolean> | default = false]

  [ingestername: <string> | default = ""]

  [mode: <string> | default = ""]

  [ingesterdbretainperiod: <duration>]

chunk_store_config

The chunk_store_config block configures how chunks will be cached and how long to wait before saving them to the backing store.

# The cache block configures the cache backend.
# The CLI flags prefix for this block configuration is: store.chunks-cache
[chunk_cache_config: <cache_config>]

# The cache block configures the cache backend.
# The CLI flags prefix for this block configuration is: store.index-cache-write
[write_dedupe_cache_config: <cache_config>]

# Cache index entries older than this period. 0 to disable.
# CLI flag: -store.cache-lookups-older-than
[cache_lookups_older_than: <duration> | default = 0s]

# This flag is deprecated. Use -querier.max-query-lookback instead.
# CLI flag: -store.max-look-back-period
[max_look_back_period: <duration> | default = 0s]

schema_config

Configures the chunk index schema and where it is stored.

[configs: <list of period_configs>]

compactor

The compactor block configures the compactor component, which compacts index shards for performance.

# Directory where files can be downloaded for compaction.
# CLI flag: -boltdb.shipper.compactor.working-directory
[working_directory: <string> | default = ""]

# The shared store used for storing boltdb files. Supported types: gcs, s3,
# azure, swift, filesystem, bos.
# CLI flag: -boltdb.shipper.compactor.shared-store
[shared_store: <string> | default = ""]

# Prefix to add to object keys in shared store. Path separator(if any) should
# always be a '/'. Prefix should never start with a separator but should always
# end with it.
# CLI flag: -boltdb.shipper.compactor.shared-store.key-prefix
[shared_store_key_prefix: <string> | default = "index/"]

# Interval at which to re-run the compaction operation.
# CLI flag: -boltdb.shipper.compactor.compaction-interval
[compaction_interval: <duration> | default = 10m]

# Interval at which to apply/enforce retention. 0 means run at same interval as
# compaction. If non-zero, it should always be a multiple of compaction
# interval.
# CLI flag: -boltdb.shipper.compactor.apply-retention-interval
[apply_retention_interval: <duration> | default = 0s]

# (Experimental) Activate custom (per-stream,per-tenant) retention.
# CLI flag: -boltdb.shipper.compactor.retention-enabled
[retention_enabled: <boolean> | default = false]

# Delay after which chunks will be fully deleted during retention.
# CLI flag: -boltdb.shipper.compactor.retention-delete-delay
[retention_delete_delay: <duration> | default = 2h]

# The total amount of worker to use to delete chunks.
# CLI flag: -boltdb.shipper.compactor.retention-delete-worker-count
[retention_delete_worker_count: <int> | default = 150]

# The maximum amount of time to spend running retention and deletion on any
# given table in the index.
# CLI flag: -boltdb.shipper.compactor.retention-table-timeout
[retention_table_timeout: <duration> | default = 0s]

# The max number of delete requests to run per compaction cycle.
# CLI flag: -boltdb.shipper.compactor.delete-batch-size
[delete_batch_size: <int> | default = 70]

# Allow cancellation of delete request until duration after they are created.
# Data would be deleted only after delete requests have been older than this
# duration. Ideally this should be set to at least 24h.
# CLI flag: -boltdb.shipper.compactor.delete-request-cancel-period
[delete_request_cancel_period: <duration> | default = 24h]

# Constrain the size of any single delete request. When a delete request >
# delete_max_interval is input, the request is sharded into smaller requests of
# no more than delete_max_interval
# CLI flag: -boltdb.shipper.compactor.delete-max-interval
[delete_max_interval: <duration> | default = 0s]

# Maximum number of tables to compact in parallel. While increasing this value,
# please make sure compactor has enough disk space allocated to be able to store
# and compact as many tables.
# CLI flag: -boltdb.shipper.compactor.max-compaction-parallelism
[max_compaction_parallelism: <int> | default = 1]

# Number of upload/remove operations to execute in parallel when finalizing a
# compaction. NOTE: This setting is per compaction operation, which can be
# executed in parallel. The upper bound on the number of concurrent uploads is
# upload_parallelism * max_compaction_parallelism.
# CLI flag: -boltdb.shipper.compactor.upload-parallelism
[upload_parallelism: <int> | default = 10]

# The hash ring configuration used by compactors to elect a single instance for
# running compactions. The CLI flags prefix for this block config is:
# boltdb.shipper.compactor.ring
compactor_ring:
  kvstore:
    # Backend storage to use for the ring. Supported values are: consul, etcd,
    # inmemory, memberlist, multi.
    # CLI flag: -boltdb.shipper.compactor.ring.store
    [store: <string> | default = "consul"]

    # The prefix for the keys in the store. Should end with a /.
    # CLI flag: -boltdb.shipper.compactor.ring.prefix
    [prefix: <string> | default = "collectors/"]

    # Configuration for a Consul client. Only applies if store is consul.
    # The CLI flags prefix for this block configuration is:
    # boltdb.shipper.compactor.ring
    [consul: <consul>]

    # Configuration for an ETCD v3 client. Only applies if store is etcd.
    # The CLI flags prefix for this block configuration is:
    # boltdb.shipper.compactor.ring
    [etcd: <etcd>]

    multi:
      # Primary backend storage used by multi-client.
      # CLI flag: -boltdb.shipper.compactor.ring.multi.primary
      [primary: <string> | default = ""]

      # Secondary backend storage used by multi-client.
      # CLI flag: -boltdb.shipper.compactor.ring.multi.secondary
      [secondary: <string> | default = ""]

      # Mirror writes to secondary store.
      # CLI flag: -boltdb.shipper.compactor.ring.multi.mirror-enabled
      [mirror_enabled: <boolean> | default = false]

      # Timeout for storing value to secondary store.
      # CLI flag: -boltdb.shipper.compactor.ring.multi.mirror-timeout
      [mirror_timeout: <duration> | default = 2s]

  # Period at which to heartbeat to the ring. 0 = disabled.
  # CLI flag: -boltdb.shipper.compactor.ring.heartbeat-period
  [heartbeat_period: <duration> | default = 15s]

  # The heartbeat timeout after which compactors are considered unhealthy within
  # the ring. 0 = never (timeout disabled).
  # CLI flag: -boltdb.shipper.compactor.ring.heartbeat-timeout
  [heartbeat_timeout: <duration> | default = 1m]

  # File path where tokens are stored. If empty, tokens are not stored at
  # shutdown and restored at startup.
  # CLI flag: -boltdb.shipper.compactor.ring.tokens-file-path
  [tokens_file_path: <string> | default = ""]

  # True to enable zone-awareness and replicate blocks across different
  # availability zones.
  # CLI flag: -boltdb.shipper.compactor.ring.zone-awareness-enabled
  [zone_awareness_enabled: <boolean> | default = false]

  # Instance ID to register in the ring.
  # CLI flag: -boltdb.shipper.compactor.ring.instance-id
  [instance_id: <string> | default = "<hostname>"]

  # Name of network interface to read address from.
  # CLI flag: -boltdb.shipper.compactor.ring.instance-interface-names
  [instance_interface_names: <list of strings> | default = [<private network interfaces>]]

  # Port to advertise in the ring (defaults to server.grpc-listen-port).
  # CLI flag: -boltdb.shipper.compactor.ring.instance-port
  [instance_port: <int> | default = 0]

  # IP address to advertise in the ring.
  # CLI flag: -boltdb.shipper.compactor.ring.instance-addr
  [instance_addr: <string> | default = ""]

  # The availability zone where this instance is running. Required if
  # zone-awareness is enabled.
  # CLI flag: -boltdb.shipper.compactor.ring.instance-availability-zone
  [instance_availability_zone: <string> | default = ""]

# Number of tables that compactor will try to compact. Newer tables are chosen
# when this is less than the number of tables available.
# CLI flag: -boltdb.shipper.compactor.tables-to-compact
[tables_to_compact: <int> | default = 0]

# Do not compact N latest tables. Together with
# -boltdb.shipper.compactor.run-once and
# -boltdb.shipper.compactor.tables-to-compact, this is useful when clearing
# compactor backlogs.
# CLI flag: -boltdb.shipper.compactor.skip-latest-n-tables
[skip_latest_n_tables: <int> | default = 0]

# Deprecated: Use deletion_mode per tenant configuration instead.
[deletion_mode: <string> | default = ""]

limits_config

The limits_config block configures global and per-tenant limits in Loki.

# Whether the ingestion rate limit should be applied individually to each
# distributor instance (local), or evenly shared across the cluster (global).
# The ingestion rate strategy cannot be overridden on a per-tenant basis.
# - local: enforces the limit on a per distributor basis. The actual effective
# rate limit will be N times higher, where N is the number of distributor
# replicas.
# - global: enforces the limit globally, configuring a per-distributor local
# rate limiter as 'ingestion_rate / N', where N is the number of distributor
# replicas (it's automatically adjusted if the number of replicas change). The
# global strategy requires the distributors to form their own ring, which is
# used to keep track of the current number of healthy distributor replicas.
# CLI flag: -distributor.ingestion-rate-limit-strategy
[ingestion_rate_strategy: <string> | default = "global"]

# Per-user ingestion rate limit in sample size per second. Units in MB.
# CLI flag: -distributor.ingestion-rate-limit-mb
[ingestion_rate_mb: <float> | default = 4]

# Per-user allowed ingestion burst size (in sample size). Units in MB. The burst
# size refers to the per-distributor local rate limiter even in the case of the
# 'global' strategy, and should be set at least to the maximum logs size
# expected in a single push request.
# CLI flag: -distributor.ingestion-burst-size-mb
[ingestion_burst_size_mb: <float> | default = 6]

# Maximum length accepted for label names.
# CLI flag: -validation.max-length-label-name
[max_label_name_length: <int> | default = 1024]

# Maximum length accepted for label value. This setting also applies to the
# metric name.
# CLI flag: -validation.max-length-label-value
[max_label_value_length: <int> | default = 2048]

# Maximum number of label names per series.
# CLI flag: -validation.max-label-names-per-series
[max_label_names_per_series: <int> | default = 30]

# Whether or not old samples will be rejected.
# CLI flag: -validation.reject-old-samples
[reject_old_samples: <boolean> | default = true]

# Maximum accepted sample age before rejecting.
# CLI flag: -validation.reject-old-samples.max-age
[reject_old_samples_max_age: <duration> | default = 1w]

# Duration which table will be created/deleted before/after it's needed; we
# won't accept sample from before this time.
# CLI flag: -validation.create-grace-period
[creation_grace_period: <duration> | default = 10m]

# Enforce every sample has a metric name.
# CLI flag: -validation.enforce-metric-name
[enforce_metric_name: <boolean> | default = true]

# Maximum line size on ingestion path. Example: 256kb. Any log line exceeding
# this limit will be discarded unless `distributor.max-line-size-truncate` is
# set which in case it is truncated instead of discarding it completely. There
# is no limit when unset or set to 0.
# CLI flag: -distributor.max-line-size
[max_line_size: <int> | default = 0B]

# Whether to truncate lines that exceed max_line_size.
# CLI flag: -distributor.max-line-size-truncate
[max_line_size_truncate: <boolean> | default = false]

# Alter the log line timestamp during ingestion when the timestamp is the same
# as the previous entry for the same stream. When enabled, if a log line in a
# push request has the same timestamp as the previous line for the same stream,
# one nanosecond is added to the log line. This will preserve the received order
# of log lines with the exact same timestamp when they are queried, by slightly
# altering their stored timestamp. NOTE: This is imperfect, because Loki accepts
# out of order writes, and another push request for the same stream could
# contain duplicate timestamps to existing entries and they will not be
# incremented.
# CLI flag: -validation.increment-duplicate-timestamps
[increment_duplicate_timestamp: <boolean> | default = false]

# Maximum number of active streams per user, per ingester. 0 to disable.
# CLI flag: -ingester.max-streams-per-user
[max_streams_per_user: <int> | default = 0]

# Maximum number of active streams per user, across the cluster. 0 to disable.
# When the global limit is enabled, each ingester is configured with a dynamic
# local limit based on the replication factor and the current number of healthy
# ingesters, and is kept updated whenever the number of ingesters change.
# CLI flag: -ingester.max-global-streams-per-user
[max_global_streams_per_user: <int> | default = 5000]

# When true, out-of-order writes are accepted.
# CLI flag: -ingester.unordered-writes
[unordered_writes: <boolean> | default = true]

# Maximum byte rate per second per stream, also expressible in human readable
# forms (1MB, 256KB, etc).
# CLI flag: -ingester.per-stream-rate-limit
[per_stream_rate_limit: <int> | default = 3MB]

# Maximum burst bytes per stream, also expressible in human readable forms (1MB,
# 256KB, etc). This is how far above the rate limit a stream can 'burst' before
# the stream is limited.
# CLI flag: -ingester.per-stream-rate-limit-burst
[per_stream_rate_limit_burst: <int> | default = 15MB]

# Maximum number of chunks that can be fetched in a single query.
# CLI flag: -store.query-chunk-limit
[max_chunks_per_query: <int> | default = 2000000]

# Limit the maximum of unique series that is returned by a metric query. When
# the limit is reached an error is returned.
# CLI flag: -querier.max-query-series
[max_query_series: <int> | default = 500]

# Limit how far back in time series data and metadata can be queried, up until
# lookback duration ago. This limit is enforced in the query frontend, the
# querier and the ruler. If the requested time range is outside the allowed
# range, the request will not fail, but will be modified to only query data
# within the allowed time range. The default value of 0 does not set a limit.
# CLI flag: -querier.max-query-lookback
[max_query_lookback: <duration> | default = 0s]

# The limit to length of chunk store queries. 0 to disable.
# CLI flag: -store.max-query-length
[max_query_length: <duration> | default = 30d1h]

# Maximum number of queries that will be scheduled in parallel by the frontend.
# CLI flag: -querier.max-query-parallelism
[max_query_parallelism: <int> | default = 32]

# Maximum number of queries will be scheduled in parallel by the frontend for
# TSDB schemas.
# CLI flag: -querier.tsdb-max-query-parallelism
[tsdb_max_query_parallelism: <int> | default = 512]

# Cardinality limit for index queries.
# CLI flag: -store.cardinality-limit
[cardinality_limit: <int> | default = 100000]

# Maximum number of stream matchers per query.
# CLI flag: -querier.max-streams-matcher-per-query
[max_streams_matchers_per_query: <int> | default = 1000]

# Maximum number of concurrent tail requests.
# CLI flag: -querier.max-concurrent-tail-requests
[max_concurrent_tail_requests: <int> | default = 10]

# Maximum number of log entries that will be returned for a query.
# CLI flag: -validation.max-entries-limit
[max_entries_limit_per_query: <int> | default = 5000]

# Most recent allowed cacheable result per-tenant, to prevent caching very
# recent results that might still be in flux.
# CLI flag: -frontend.max-cache-freshness
[max_cache_freshness_per_query: <duration> | default = 1m]

# Maximum number of queriers that can handle requests for a single tenant. If
# set to 0 or value higher than number of available queriers, *all* queriers
# will handle requests for the tenant. Each frontend (or query-scheduler, if
# used) will select the same set of queriers for the same tenant (given that all
# queriers are connected to all frontends / query-schedulers). This option only
# works with queriers connecting to the query-frontend / query-scheduler, not
# when using downstream URL.
# CLI flag: -frontend.max-queriers-per-tenant
[max_queriers_per_tenant: <int> | default = 0]

# Number of days of index to be kept always downloaded for queries. Applies only
# to per user index in boltdb-shipper index store. 0 to disable.
# CLI flag: -store.query-ready-index-num-days
[query_ready_index_num_days: <int> | default = 0]

# Timeout when querying backends (ingesters or storage) during the execution of
# a query request. If a specific per-tenant timeout is used, this timeout is
# ignored.
# CLI flag: -querier.query-timeout
[query_timeout: <duration> | default = 1m]

# Split queries by a time interval and execute in parallel. The value 0 disables
# splitting by time. This also determines how cache keys are chosen when result
# caching is enabled.
# CLI flag: -querier.split-queries-by-interval
[split_queries_by_interval: <duration> | default = 30m]

# Limit queries that can be sharded. Queries within the time range of now and
# now minus this sharding lookback are not sharded. The default value of 0s
# disables the lookback, causing sharding of all queries at all times.
# CLI flag: -frontend.min-sharding-lookback
[min_sharding_lookback: <duration> | default = 0s]

# Duration to delay the evaluation of rules to ensure the underlying metrics
# have been pushed to Cortex.
# CLI flag: -ruler.evaluation-delay-duration
[ruler_evaluation_delay_duration: <duration> | default = 0s]

# Maximum number of rules per rule group per-tenant. 0 to disable.
# CLI flag: -ruler.max-rules-per-rule-group
[ruler_max_rules_per_rule_group: <int> | default = 0]

# Maximum number of rule groups per-tenant. 0 to disable.
# CLI flag: -ruler.max-rule-groups-per-tenant
[ruler_max_rule_groups_per_tenant: <int> | default = 0]

# The default tenant's shard size when shuffle-sharding is enabled in the ruler.
# When this setting is specified in the per-tenant overrides, a value of 0
# disables shuffle sharding for the tenant.
# CLI flag: -ruler.tenant-shard-size
[ruler_tenant_shard_size: <int> | default = 0]

# Disable recording rules remote-write.
[ruler_remote_write_disabled: <boolean>]

# Deprecated: Use 'ruler_remote_write_config' instead. The URL of the endpoint
# to send samples to.
[ruler_remote_write_url: <string> | default = ""]

# Deprecated: Use 'ruler_remote_write_config' instead. Timeout for requests to
# the remote write endpoint.
[ruler_remote_write_timeout: <duration>]

# Deprecated: Use 'ruler_remote_write_config' instead. Custom HTTP headers to be
# sent along with each remote write request. Be aware that headers that are set
# by Loki itself can't be overwritten.
[ruler_remote_write_headers: <headers>]

# Deprecated: Use 'ruler_remote_write_config' instead. List of remote write
# relabel configurations.
[ruler_remote_write_relabel_configs: <relabel_config...>]

# Deprecated: Use 'ruler_remote_write_config' instead. Number of samples to
# buffer per shard before we block reading of more samples from the WAL. It is
# recommended to have enough capacity in each shard to buffer several requests
# to keep throughput up while processing occasional slow remote requests.
[ruler_remote_write_queue_capacity: <int>]

# Deprecated: Use 'ruler_remote_write_config' instead. Minimum number of shards,
# i.e. amount of concurrency.
[ruler_remote_write_queue_min_shards: <int>]

# Deprecated: Use 'ruler_remote_write_config' instead. Maximum number of shards,
# i.e. amount of concurrency.
[ruler_remote_write_queue_max_shards: <int>]

# Deprecated: Use 'ruler_remote_write_config' instead. Maximum number of samples
# per send.
[ruler_remote_write_queue_max_samples_per_send: <int>]

# Deprecated: Use 'ruler_remote_write_config' instead. Maximum time a sample
# will wait in buffer.
[ruler_remote_write_queue_batch_send_deadline: <duration>]

# Deprecated: Use 'ruler_remote_write_config' instead. Initial retry delay. Gets
# doubled for every retry.
[ruler_remote_write_queue_min_backoff: <duration>]

# Deprecated: Use 'ruler_remote_write_config' instead. Maximum retry delay.
[ruler_remote_write_queue_max_backoff: <duration>]

# Deprecated: Use 'ruler_remote_write_config' instead. Retry upon receiving a
# 429 status code from the remote-write storage. This is experimental and might
# change in the future.
[ruler_remote_write_queue_retry_on_ratelimit: <boolean>]

# Deprecated: Use 'ruler_remote_write_config' instead. Configures AWS's
# Signature Verification 4 signing process to sign every remote write request.
ruler_remote_write_sigv4_config:
  [region: <string> | default = ""]

  [access_key: <string> | default = ""]

  [secret_key: <string> | default = ""]

  [profile: <string> | default = ""]

  [role_arn: <string> | default = ""]

# Configures global and per-tenant limits for remote write clients. A map with
# remote client id as key.
[ruler_remote_write_config: <map of string to RemoteWriteConfig>]

# Deletion mode. Can be one of 'disabled', 'filter-only', or
# 'filter-and-delete'. When set to 'filter-only' or 'filter-and-delete', and if
# retention_enabled is true, then the log entry deletion API endpoints are
# available.
# CLI flag: -compactor.deletion-mode
[deletion_mode: <string> | default = "filter-and-delete"]

# Retention to apply for the store, if the retention is enabled on the compactor
# side.
# CLI flag: -store.retention
[retention_period: <duration> | default = 31d]

# Per-stream retention to apply, if the retention is enable on the compactor
# side.
# Example:
#  retention_stream:
#  - selector: '{namespace="dev"}'
#  priority: 1
#  period: 24h
# - selector: '{container="nginx"}'
#  priority: 1
#  period: 744h
# Selector is a Prometheus labels matchers that will apply the 'period'
# retention only if the stream is matching. In case multiple stream are
# matching, the highest priority will be picked. If no rule is matched the
# 'retention_period' is used.
[retention_stream: <list of StreamRetentions>]

# Feature renamed to 'runtime configuration', flag deprecated in favor of
# -runtime-config.file (runtime_config.file in YAML).
# CLI flag: -limits.per-user-override-config
[per_tenant_override_config: <string> | default = ""]

# Feature renamed to 'runtime configuration'; flag deprecated in favor of
# -runtime-config.reload-period (runtime_config.period in YAML).
# CLI flag: -limits.per-user-override-period
[per_tenant_override_period: <duration> | default = 10s]

# Deprecated: Use deletion_mode per tenant configuration instead.
[allow_deletes: <boolean>]

shard_streams:
  [enabled: <boolean>]

  [logging_enabled: <boolean>]

  [desired_rate: <int>]

[blocked_queries: <blocked_query...>]

frontend_worker

The frontend_worker configures the worker - running within the Loki querier - picking up and executing queries enqueued by the query-frontend.

# Address of query frontend service, in host:port format. If
# -querier.scheduler-address is set as well, querier will use scheduler instead.
# Only one of -querier.frontend-address or -querier.scheduler-address can be
# set. If neither is set, queries are only received via HTTP endpoint.
# CLI flag: -querier.frontend-address
[frontend_address: <string> | default = ""]

# Hostname (and port) of scheduler that querier will periodically resolve,
# connect to and receive queries from. Only one of -querier.frontend-address or
# -querier.scheduler-address can be set. If neither is set, queries are only
# received via HTTP endpoint.
# CLI flag: -querier.scheduler-address
[scheduler_address: <string> | default = ""]

# How often to query DNS for query-frontend or query-scheduler address. Also
# used to determine how often to poll the scheduler-ring for addresses if the
# scheduler-ring is configured.
# CLI flag: -querier.dns-lookup-period
[dns_lookup_duration: <duration> | default = 3s]

# Number of simultaneous queries to process per query-frontend or
# query-scheduler.
# CLI flag: -querier.worker-parallelism
[parallelism: <int> | default = 10]

# Force worker concurrency to match the -querier.max-concurrent option.
# Overrides querier.worker-parallelism.
# CLI flag: -querier.worker-match-max-concurrent
[match_max_concurrent: <boolean> | default = true]

# Querier ID, sent to frontend service to identify requests from the same
# querier. Defaults to hostname.
# CLI flag: -querier.id
[id: <string> | default = ""]

# The grpc_client block configures the gRPC client used to communicate between
# two Loki components.
# The CLI flags prefix for this block configuration is: querier.frontend-client
[grpc_client_config: <grpc_client>]

table_manager

The table_manager block configures the table manager for retention.

# If true, disable all changes to DB capacity
# CLI flag: -table-manager.throughput-updates-disabled
[throughput_updates_disabled: <boolean> | default = false]

# If true, enables retention deletes of DB tables
# CLI flag: -table-manager.retention-deletes-enabled
[retention_deletes_enabled: <boolean> | default = false]

# Tables older than this retention period are deleted. Must be either 0
# (disabled) or a multiple of 24h. When enabled, be aware this setting is
# destructive to data!
# CLI flag: -table-manager.retention-period
[retention_period: <duration> | default = 0s]

# How frequently to poll backend to learn our capacity.
# CLI flag: -table-manager.poll-interval
[poll_interval: <duration> | default = 2m]

# Periodic tables grace period (duration which table will be created/deleted
# before/after it's needed).
# CLI flag: -table-manager.periodic-table.grace-period
[creation_grace_period: <duration> | default = 10m]

index_tables_provisioning:
  # Enables on demand throughput provisioning for the storage provider (if
  # supported). Applies only to tables which are not autoscaled. Supported by
  # DynamoDB
  # CLI flag: -table-manager.index-table.enable-ondemand-throughput-mode
  [enable_ondemand_throughput_mode: <boolean> | default = false]

  # Table default write throughput. Supported by DynamoDB
  # CLI flag: -table-manager.index-table.write-throughput
  [provisioned_write_throughput: <int> | default = 1000]

  # Table default read throughput. Supported by DynamoDB
  # CLI flag: -table-manager.index-table.read-throughput
  [provisioned_read_throughput: <int> | default = 300]

  write_scale:
    # Should we enable autoscale for the table.
    # CLI flag: -table-manager.index-table.write-throughput.scale.enabled
    [enabled: <boolean> | default = false]

    # AWS AutoScaling role ARN
    # CLI flag: -table-manager.index-table.write-throughput.scale.role-arn
    [role_arn: <string> | default = ""]

    # DynamoDB minimum provision capacity.
    # CLI flag: -table-manager.index-table.write-throughput.scale.min-capacity
    [min_capacity: <int> | default = 3000]

    # DynamoDB maximum provision capacity.
    # CLI flag: -table-manager.index-table.write-throughput.scale.max-capacity
    [max_capacity: <int> | default = 6000]

    # DynamoDB minimum seconds between each autoscale up.
    # CLI flag: -table-manager.index-table.write-throughput.scale.out-cooldown
    [out_cooldown: <int> | default = 1800]

    # DynamoDB minimum seconds between each autoscale down.
    # CLI flag: -table-manager.index-table.write-throughput.scale.in-cooldown
    [in_cooldown: <int> | default = 1800]

    # DynamoDB target ratio of consumed capacity to provisioned capacity.
    # CLI flag: -table-manager.index-table.write-throughput.scale.target-value
    [target: <float> | default = 80]

  read_scale:
    # Should we enable autoscale for the table.
    # CLI flag: -table-manager.index-table.read-throughput.scale.enabled
    [enabled: <boolean> | default = false]

    # AWS AutoScaling role ARN
    # CLI flag: -table-manager.index-table.read-throughput.scale.role-arn
    [role_arn: <string> | default = ""]

    # DynamoDB minimum provision capacity.
    # CLI flag: -table-manager.index-table.read-throughput.scale.min-capacity
    [min_capacity: <int> | default = 3000]

    # DynamoDB maximum provision capacity.
    # CLI flag: -table-manager.index-table.read-throughput.scale.max-capacity
    [max_capacity: <int> | default = 6000]

    # DynamoDB minimum seconds between each autoscale up.
    # CLI flag: -table-manager.index-table.read-throughput.scale.out-cooldown
    [out_cooldown: <int> | default = 1800]

    # DynamoDB minimum seconds between each autoscale down.
    # CLI flag: -table-manager.index-table.read-throughput.scale.in-cooldown
    [in_cooldown: <int> | default = 1800]

    # DynamoDB target ratio of consumed capacity to provisioned capacity.
    # CLI flag: -table-manager.index-table.read-throughput.scale.target-value
    [target: <float> | default = 80]

  # Enables on demand throughput provisioning for the storage provider (if
  # supported). Applies only to tables which are not autoscaled. Supported by
  # DynamoDB
  # CLI flag: -table-manager.index-table.inactive-enable-ondemand-throughput-mode
  [enable_inactive_throughput_on_demand_mode: <boolean> | default = false]

  # Table write throughput for inactive tables. Supported by DynamoDB
  # CLI flag: -table-manager.index-table.inactive-write-throughput
  [inactive_write_throughput: <int> | default = 1]

  # Table read throughput for inactive tables. Supported by DynamoDB
  # CLI flag: -table-manager.index-table.inactive-read-throughput
  [inactive_read_throughput: <int> | default = 300]

  inactive_write_scale:
    # Should we enable autoscale for the table.
    # CLI flag: -table-manager.index-table.inactive-write-throughput.scale.enabled
    [enabled: <boolean> | default = false]

    # AWS AutoScaling role ARN
    # CLI flag: -table-manager.index-table.inactive-write-throughput.scale.role-arn
    [role_arn: <string> | default = ""]

    # DynamoDB minimum provision capacity.
    # CLI flag: -table-manager.index-table.inactive-write-throughput.scale.min-capacity
    [min_capacity: <int> | default = 3000]

    # DynamoDB maximum provision capacity.
    # CLI flag: -table-manager.index-table.inactive-write-throughput.scale.max-capacity
    [max_capacity: <int> | default = 6000]

    # DynamoDB minimum seconds between each autoscale up.
    # CLI flag: -table-manager.index-table.inactive-write-throughput.scale.out-cooldown
    [out_cooldown: <int> | default = 1800]

    # DynamoDB minimum seconds between each autoscale down.
    # CLI flag: -table-manager.index-table.inactive-write-throughput.scale.in-cooldown
    [in_cooldown: <int> | default = 1800]

    # DynamoDB target ratio of consumed capacity to provisioned capacity.
    # CLI flag: -table-manager.index-table.inactive-write-throughput.scale.target-value
    [target: <float> | default = 80]

  inactive_read_scale:
    # Should we enable autoscale for the table.
    # CLI flag: -table-manager.index-table.inactive-read-throughput.scale.enabled
    [enabled: <boolean> | default = false]

    # AWS AutoScaling role ARN
    # CLI flag: -table-manager.index-table.inactive-read-throughput.scale.role-arn
    [role_arn: <string> | default = ""]

    # DynamoDB minimum provision capacity.
    # CLI flag: -table-manager.index-table.inactive-read-throughput.scale.min-capacity
    [min_capacity: <int> | default = 3000]

    # DynamoDB maximum provision capacity.
    # CLI flag: -table-manager.index-table.inactive-read-throughput.scale.max-capacity
    [max_capacity: <int> | default = 6000]

    # DynamoDB minimum seconds between each autoscale up.
    # CLI flag: -table-manager.index-table.inactive-read-throughput.scale.out-cooldown
    [out_cooldown: <int> | default = 1800]

    # DynamoDB minimum seconds between each autoscale down.
    # CLI flag: -table-manager.index-table.inactive-read-throughput.scale.in-cooldown
    [in_cooldown: <int> | default = 1800]

    # DynamoDB target ratio of consumed capacity to provisioned capacity.
    # CLI flag: -table-manager.index-table.inactive-read-throughput.scale.target-value
    [target: <float> | default = 80]

  # Number of last inactive tables to enable write autoscale.
  # CLI flag: -table-manager.index-table.inactive-write-throughput.scale-last-n
  [inactive_write_scale_lastn: <int> | default = 4]

  # Number of last inactive tables to enable read autoscale.
  # CLI flag: -table-manager.index-table.inactive-read-throughput.scale-last-n
  [inactive_read_scale_lastn: <int> | default = 4]

chunk_tables_provisioning:
  # Enables on demand throughput provisioning for the storage provider (if
  # supported). Applies only to tables which are not autoscaled. Supported by
  # DynamoDB
  # CLI flag: -table-manager.chunk-table.enable-ondemand-throughput-mode
  [enable_ondemand_throughput_mode: <boolean> | default = false]

  # Table default write throughput. Supported by DynamoDB
  # CLI flag: -table-manager.chunk-table.write-throughput
  [provisioned_write_throughput: <int> | default = 1000]

  # Table default read throughput. Supported by DynamoDB
  # CLI flag: -table-manager.chunk-table.read-throughput
  [provisioned_read_throughput: <int> | default = 300]

  write_scale:
    # Should we enable autoscale for the table.
    # CLI flag: -table-manager.chunk-table.write-throughput.scale.enabled
    [enabled: <boolean> | default = false]

    # AWS AutoScaling role ARN
    # CLI flag: -table-manager.chunk-table.write-throughput.scale.role-arn
    [role_arn: <string> | default = ""]

    # DynamoDB minimum provision capacity.
    # CLI flag: -table-manager.chunk-table.write-throughput.scale.min-capacity
    [min_capacity: <int> | default = 3000]

    # DynamoDB maximum provision capacity.
    # CLI flag: -table-manager.chunk-table.write-throughput.scale.max-capacity
    [max_capacity: <int> | default = 6000]

    # DynamoDB minimum seconds between each autoscale up.
    # CLI flag: -table-manager.chunk-table.write-throughput.scale.out-cooldown
    [out_cooldown: <int> | default = 1800]

    # DynamoDB minimum seconds between each autoscale down.
    # CLI flag: -table-manager.chunk-table.write-throughput.scale.in-cooldown
    [in_cooldown: <int> | default = 1800]

    # DynamoDB target ratio of consumed capacity to provisioned capacity.
    # CLI flag: -table-manager.chunk-table.write-throughput.scale.target-value
    [target: <float> | default = 80]

  read_scale:
    # Should we enable autoscale for the table.
    # CLI flag: -table-manager.chunk-table.read-throughput.scale.enabled
    [enabled: <boolean> | default = false]

    # AWS AutoScaling role ARN
    # CLI flag: -table-manager.chunk-table.read-throughput.scale.role-arn
    [role_arn: <string> | default = ""]

    # DynamoDB minimum provision capacity.
    # CLI flag: -table-manager.chunk-table.read-throughput.scale.min-capacity
    [min_capacity: <int> | default = 3000]

    # DynamoDB maximum provision capacity.
    # CLI flag: -table-manager.chunk-table.read-throughput.scale.max-capacity
    [max_capacity: <int> | default = 6000]

    # DynamoDB minimum seconds between each autoscale up.
    # CLI flag: -table-manager.chunk-table.read-throughput.scale.out-cooldown
    [out_cooldown: <int> | default = 1800]

    # DynamoDB minimum seconds between each autoscale down.
    # CLI flag: -table-manager.chunk-table.read-throughput.scale.in-cooldown
    [in_cooldown: <int> | default = 1800]

    # DynamoDB target ratio of consumed capacity to provisioned capacity.
    # CLI flag: -table-manager.chunk-table.read-throughput.scale.target-value
    [target: <float> | default = 80]

  # Enables on demand throughput provisioning for the storage provider (if
  # supported). Applies only to tables which are not autoscaled. Supported by
  # DynamoDB
  # CLI flag: -table-manager.chunk-table.inactive-enable-ondemand-throughput-mode
  [enable_inactive_throughput_on_demand_mode: <boolean> | default = false]

  # Table write throughput for inactive tables. Supported by DynamoDB
  # CLI flag: -table-manager.chunk-table.inactive-write-throughput
  [inactive_write_throughput: <int> | default = 1]

  # Table read throughput for inactive tables. Supported by DynamoDB
  # CLI flag: -table-manager.chunk-table.inactive-read-throughput
  [inactive_read_throughput: <int> | default = 300]

  inactive_write_scale:
    # Should we enable autoscale for the table.
    # CLI flag: -table-manager.chunk-table.inactive-write-throughput.scale.enabled
    [enabled: <boolean> | default = false]

    # AWS AutoScaling role ARN
    # CLI flag: -table-manager.chunk-table.inactive-write-throughput.scale.role-arn
    [role_arn: <string> | default = ""]

    # DynamoDB minimum provision capacity.
    # CLI flag: -table-manager.chunk-table.inactive-write-throughput.scale.min-capacity
    [min_capacity: <int> | default = 3000]

    # DynamoDB maximum provision capacity.
    # CLI flag: -table-manager.chunk-table.inactive-write-throughput.scale.max-capacity
    [max_capacity: <int> | default = 6000]

    # DynamoDB minimum seconds between each autoscale up.
    # CLI flag: -table-manager.chunk-table.inactive-write-throughput.scale.out-cooldown
    [out_cooldown: <int> | default = 1800]

    # DynamoDB minimum seconds between each autoscale down.
    # CLI flag: -table-manager.chunk-table.inactive-write-throughput.scale.in-cooldown
    [in_cooldown: <int> | default = 1800]

    # DynamoDB target ratio of consumed capacity to provisioned capacity.
    # CLI flag: -table-manager.chunk-table.inactive-write-throughput.scale.target-value
    [target: <float> | default = 80]

  inactive_read_scale:
    # Should we enable autoscale for the table.
    # CLI flag: -table-manager.chunk-table.inactive-read-throughput.scale.enabled
    [enabled: <boolean> | default = false]

    # AWS AutoScaling role ARN
    # CLI flag: -table-manager.chunk-table.inactive-read-throughput.scale.role-arn
    [role_arn: <string> | default = ""]

    # DynamoDB minimum provision capacity.
    # CLI flag: -table-manager.chunk-table.inactive-read-throughput.scale.min-capacity
    [min_capacity: <int> | default = 3000]

    # DynamoDB maximum provision capacity.
    # CLI flag: -table-manager.chunk-table.inactive-read-throughput.scale.max-capacity
    [max_capacity: <int> | default = 6000]

    # DynamoDB minimum seconds between each autoscale up.
    # CLI flag: -table-manager.chunk-table.inactive-read-throughput.scale.out-cooldown
    [out_cooldown: <int> | default = 1800]

    # DynamoDB minimum seconds between each autoscale down.
    # CLI flag: -table-manager.chunk-table.inactive-read-throughput.scale.in-cooldown
    [in_cooldown: <int> | default = 1800]

    # DynamoDB target ratio of consumed capacity to provisioned capacity.
    # CLI flag: -table-manager.chunk-table.inactive-read-throughput.scale.target-value
    [target: <float> | default = 80]

  # Number of last inactive tables to enable write autoscale.
  # CLI flag: -table-manager.chunk-table.inactive-write-throughput.scale-last-n
  [inactive_write_scale_lastn: <int> | default = 4]

  # Number of last inactive tables to enable read autoscale.
  # CLI flag: -table-manager.chunk-table.inactive-read-throughput.scale-last-n
  [inactive_read_scale_lastn: <int> | default = 4]

runtime_config

Configuration for ‘runtime config’ module, responsible for reloading runtime configuration file.

# How often to check runtime config files.
# CLI flag: -runtime-config.reload-period
[period: <duration> | default = 10s]

# Comma separated list of yaml files with the configuration that can be updated
# at runtime. Runtime config files will be merged from left to right.
# CLI flag: -runtime-config.file
[file: <string> | default = ""]

tracing

Configuration for tracing.

# Set to false to disable tracing.
# CLI flag: -tracing.enabled
[enabled: <boolean> | default = true]

analytics

Configuration for usage report.

# Enable anonymous usage reporting.
# CLI flag: -reporting.enabled
[reporting_enabled: <boolean> | default = true]

common

Common configuration to be shared between multiple modules. If a more specific configuration is given in other sections, the related configuration within this section will be ignored.

[path_prefix: <string> | default = ""]

storage:
  # The s3_storage_config block configures the connection to Amazon S3 object
  # storage backend.
  # The CLI flags prefix for this block configuration is: common
  [s3: <s3_storage_config>]

  # The gcs_storage_config block configures the connection to Google Cloud
  # Storage object storage backend.
  # The CLI flags prefix for this block configuration is: common.storage
  [gcs: <gcs_storage_config>]

  # The azure_storage_config block configures the connection to Azure object
  # storage backend.
  # The CLI flags prefix for this block configuration is: common.storage
  [azure: <azure_storage_config>]

  # The bos_storage_config block configures the connection to Baidu Object
  # Storage (BOS) object storage backend.
  # The CLI flags prefix for this block configuration is: common.storage
  [bos: <bos_storage_config>]

  # The swift_storage_config block configures the connection to OpenStack Object
  # Storage (Swift) object storage backend.
  # The CLI flags prefix for this block configuration is: common.storage
  [swift: <swift_storage_config>]

  filesystem:
    # Directory to store chunks in.
    # CLI flag: -common.storage.filesystem.chunk-directory
    [chunks_directory: <string> | default = ""]

    # Directory to store rules in.
    # CLI flag: -common.storage.filesystem.rules-directory
    [rules_directory: <string> | default = ""]

  hedging:
    # If set to a non-zero value a second request will be issued at the provided
    # duration. Default is 0 (disabled)
    # CLI flag: -common.storage.hedge-requests-at
    [at: <duration> | default = 0s]

    # The maximum of hedge requests allowed.
    # CLI flag: -common.storage.hedge-requests-up-to
    [up_to: <int> | default = 2]

    # The maximum of hedge requests allowed per seconds.
    # CLI flag: -common.storage.hedge-max-per-second
    [max_per_second: <int> | default = 5]

[persist_tokens: <boolean>]

[replication_factor: <int>]

ring:
  kvstore:
    # Backend storage to use for the ring. Supported values are: consul, etcd,
    # inmemory, memberlist, multi.
    # CLI flag: -common.storage.ring.store
    [store: <string> | default = "consul"]

    # The prefix for the keys in the store. Should end with a /.
    # CLI flag: -common.storage.ring.prefix
    [prefix: <string> | default = "collectors/"]

    # Configuration for a Consul client. Only applies if store is consul.
    # The CLI flags prefix for this block configuration is: common.storage.ring
    [consul: <consul>]

    # Configuration for an ETCD v3 client. Only applies if store is etcd.
    # The CLI flags prefix for this block configuration is: common.storage.ring
    [etcd: <etcd>]

    multi:
      # Primary backend storage used by multi-client.
      # CLI flag: -common.storage.ring.multi.primary
      [primary: <string> | default = ""]

      # Secondary backend storage used by multi-client.
      # CLI flag: -common.storage.ring.multi.secondary
      [secondary: <string> | default = ""]

      # Mirror writes to secondary store.
      # CLI flag: -common.storage.ring.multi.mirror-enabled
      [mirror_enabled: <boolean> | default = false]

      # Timeout for storing value to secondary store.
      # CLI flag: -common.storage.ring.multi.mirror-timeout
      [mirror_timeout: <duration> | default = 2s]

  # Period at which to heartbeat to the ring. 0 = disabled.
  # CLI flag: -common.storage.ring.heartbeat-period
  [heartbeat_period: <duration> | default = 15s]

  # The heartbeat timeout after which compactors are considered unhealthy within
  # the ring. 0 = never (timeout disabled).
  # CLI flag: -common.storage.ring.heartbeat-timeout
  [heartbeat_timeout: <duration> | default = 1m]

  # File path where tokens are stored. If empty, tokens are not stored at
  # shutdown and restored at startup.
  # CLI flag: -common.storage.ring.tokens-file-path
  [tokens_file_path: <string> | default = ""]

  # True to enable zone-awareness and replicate blocks across different
  # availability zones.
  # CLI flag: -common.storage.ring.zone-awareness-enabled
  [zone_awareness_enabled: <boolean> | default = false]

  # Instance ID to register in the ring.
  # CLI flag: -common.storage.ring.instance-id
  [instance_id: <string> | default = "<hostname>"]

  # Name of network interface to read address from.
  # CLI flag: -common.storage.ring.instance-interface-names
  [instance_interface_names: <list of strings> | default = [<private network interfaces>]]

  # Port to advertise in the ring (defaults to server.grpc-listen-port).
  # CLI flag: -common.storage.ring.instance-port
  [instance_port: <int> | default = 0]

  # IP address to advertise in the ring.
  # CLI flag: -common.storage.ring.instance-addr
  [instance_addr: <string> | default = ""]

  # The availability zone where this instance is running. Required if
  # zone-awareness is enabled.
  # CLI flag: -common.storage.ring.instance-availability-zone
  [instance_availability_zone: <string> | default = ""]

[instance_interface_names: <list of strings>]

[instance_addr: <string> | default = ""]

# the http address of the compactor in the form http://host:port
# CLI flag: -common.compactor-address
[compactor_address: <string> | default = ""]

# the grpc address of the compactor in the form host:port
# CLI flag: -common.compactor-grpc-address
[compactor_grpc_address: <string> | default = ""]

consul

Configuration for a Consul client. Only applies if store is consul. The supported CLI flags <prefix> used to reference this configuration block are:

  • boltdb.shipper.compactor.ring
  • common.storage.ring
  • distributor.ring
  • index-gateway.ring
  • query-scheduler.ring
  • ruler.ring

 

# Hostname and port of Consul.
# CLI flag: -<prefix>.consul.hostname
[host: <string> | default = "localhost:8500"]

# ACL Token used to interact with Consul.
# CLI flag: -<prefix>.consul.acl-token
[acl_token: <string> | default = ""]

# HTTP timeout when talking to Consul
# CLI flag: -<prefix>.consul.client-timeout
[http_client_timeout: <duration> | default = 20s]

# Enable consistent reads to Consul.
# CLI flag: -<prefix>.consul.consistent-reads
[consistent_reads: <boolean> | default = false]

# Rate limit when watching key or prefix in Consul, in requests per second. 0
# disables the rate limit.
# CLI flag: -<prefix>.consul.watch-rate-limit
[watch_rate_limit: <float> | default = 1]

# Burst size used in rate limit. Values less than 1 are treated as 1.
# CLI flag: -<prefix>.consul.watch-burst-size
[watch_burst_size: <int> | default = 1]

# Maximum duration to wait before retrying a Compare And Swap (CAS) operation.
# CLI flag: -<prefix>.consul.cas-retry-delay
[cas_retry_delay: <duration> | default = 1s]

etcd

Configuration for an ETCD v3 client. Only applies if store is etcd. The supported CLI flags <prefix> used to reference this configuration block are:

  • boltdb.shipper.compactor.ring
  • common.storage.ring
  • distributor.ring
  • index-gateway.ring
  • query-scheduler.ring
  • ruler.ring

 

# The etcd endpoints to connect to.
# CLI flag: -<prefix>.etcd.endpoints
[endpoints: <list of strings> | default = []]

# The dial timeout for the etcd connection.
# CLI flag: -<prefix>.etcd.dial-timeout
[dial_timeout: <duration> | default = 10s]

# The maximum number of retries to do for failed ops.
# CLI flag: -<prefix>.etcd.max-retries
[max_retries: <int> | default = 10]

# Enable TLS.
# CLI flag: -<prefix>.etcd.tls-enabled
[tls_enabled: <boolean> | default = false]

# Path to the client certificate file, which will be used for authenticating
# with the server. Also requires the key path to be configured.
# CLI flag: -<prefix>.etcd.tls-cert-path
[tls_cert_path: <string> | default = ""]

# Path to the key file for the client certificate. Also requires the client
# certificate to be configured.
# CLI flag: -<prefix>.etcd.tls-key-path
[tls_key_path: <string> | default = ""]

# Path to the CA certificates file to validate server certificate against. If
# not set, the host's root CA certificates are used.
# CLI flag: -<prefix>.etcd.tls-ca-path
[tls_ca_path: <string> | default = ""]

# Override the expected name on the server certificate.
# CLI flag: -<prefix>.etcd.tls-server-name
[tls_server_name: <string> | default = ""]

# Skip validating server certificate.
# CLI flag: -<prefix>.etcd.tls-insecure-skip-verify
[tls_insecure_skip_verify: <boolean> | default = false]

# Override the default cipher suite list (separated by commas). Allowed values:
# 
# Secure Ciphers:
# - TLS_RSA_WITH_AES_128_CBC_SHA
# - TLS_RSA_WITH_AES_256_CBC_SHA
# - TLS_RSA_WITH_AES_128_GCM_SHA256
# - TLS_RSA_WITH_AES_256_GCM_SHA384
# - TLS_AES_128_GCM_SHA256
# - TLS_AES_256_GCM_SHA384
# - TLS_CHACHA20_POLY1305_SHA256
# - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
# - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
# - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
# - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
# - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
# - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
# - TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
# - TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
# 
# Insecure Ciphers:
# - TLS_RSA_WITH_RC4_128_SHA
# - TLS_RSA_WITH_3DES_EDE_CBC_SHA
# - TLS_RSA_WITH_AES_128_CBC_SHA256
# - TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
# - TLS_ECDHE_RSA_WITH_RC4_128_SHA
# - TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
# - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
# CLI flag: -<prefix>.etcd.tls-cipher-suites
[tls_cipher_suites: <string> | default = ""]

# Override the default minimum TLS version. Allowed values: VersionTLS10,
# VersionTLS11, VersionTLS12, VersionTLS13
# CLI flag: -<prefix>.etcd.tls-min-version
[tls_min_version: <string> | default = ""]

# Etcd username.
# CLI flag: -<prefix>.etcd.username
[username: <string> | default = ""]

# Etcd password.
# CLI flag: -<prefix>.etcd.password
[password: <string> | default = ""]

grpc_client

The grpc_client block configures the gRPC client used to communicate between two Loki components. The supported CLI flags <prefix> used to reference this configuration block are:

  • bigtable
  • boltdb.shipper.index-gateway-client.grpc
  • frontend.grpc-client-config
  • ingester.client
  • querier.frontend-client
  • query-scheduler.grpc-client-config
  • ruler.client
  • tsdb.shipper.index-gateway-client.grpc

 

# gRPC client max receive message size (bytes).
# CLI flag: -<prefix>.grpc-max-recv-msg-size
[max_recv_msg_size: <int> | default = 104857600]

# gRPC client max send message size (bytes).
# CLI flag: -<prefix>.grpc-max-send-msg-size
[max_send_msg_size: <int> | default = 104857600]

# Use compression when sending messages. Supported values are: 'gzip', 'snappy'
# and '' (disable compression)
# CLI flag: -<prefix>.grpc-compression
[grpc_compression: <string> | default = ""]

# Rate limit for gRPC client; 0 means disabled.
# CLI flag: -<prefix>.grpc-client-rate-limit
[rate_limit: <float> | default = 0]

# Rate limit burst for gRPC client.
# CLI flag: -<prefix>.grpc-client-rate-limit-burst
[rate_limit_burst: <int> | default = 0]

# Enable backoff and retry when we hit ratelimits.
# CLI flag: -<prefix>.backoff-on-ratelimits
[backoff_on_ratelimits: <boolean> | default = false]

backoff_config:
  # Minimum delay when backing off.
  # CLI flag: -<prefix>.backoff-min-period
  [min_period: <duration> | default = 100ms]

  # Maximum delay when backing off.
  # CLI flag: -<prefix>.backoff-max-period
  [max_period: <duration> | default = 10s]

  # Number of times to backoff and retry before failing.
  # CLI flag: -<prefix>.backoff-retries
  [max_retries: <int> | default = 10]

# Enable TLS in the GRPC client. This flag needs to be enabled when any other
# TLS flag is set. If set to false, insecure connection to gRPC server will be
# used.
# CLI flag: -<prefix>.tls-enabled
[tls_enabled: <boolean> | default = false]

# Path to the client certificate file, which will be used for authenticating
# with the server. Also requires the key path to be configured.
# CLI flag: -<prefix>.tls-cert-path
[tls_cert_path: <string> | default = ""]

# Path to the key file for the client certificate. Also requires the client
# certificate to be configured.
# CLI flag: -<prefix>.tls-key-path
[tls_key_path: <string> | default = ""]

# Path to the CA certificates file to validate server certificate against. If
# not set, the host's root CA certificates are used.
# CLI flag: -<prefix>.tls-ca-path
[tls_ca_path: <string> | default = ""]

# Override the expected name on the server certificate.
# CLI flag: -<prefix>.tls-server-name
[tls_server_name: <string> | default = ""]

# Skip validating server certificate.
# CLI flag: -<prefix>.tls-insecure-skip-verify
[tls_insecure_skip_verify: <boolean> | default = false]

# Override the default cipher suite list (separated by commas). Allowed values:
# 
# Secure Ciphers:
# - TLS_RSA_WITH_AES_128_CBC_SHA
# - TLS_RSA_WITH_AES_256_CBC_SHA
# - TLS_RSA_WITH_AES_128_GCM_SHA256
# - TLS_RSA_WITH_AES_256_GCM_SHA384
# - TLS_AES_128_GCM_SHA256
# - TLS_AES_256_GCM_SHA384
# - TLS_CHACHA20_POLY1305_SHA256
# - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
# - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
# - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
# - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
# - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
# - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
# - TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
# - TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
# 
# Insecure Ciphers:
# - TLS_RSA_WITH_RC4_128_SHA
# - TLS_RSA_WITH_3DES_EDE_CBC_SHA
# - TLS_RSA_WITH_AES_128_CBC_SHA256
# - TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
# - TLS_ECDHE_RSA_WITH_RC4_128_SHA
# - TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
# - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
# CLI flag: -<prefix>.tls-cipher-suites
[tls_cipher_suites: <string> | default = ""]

# Override the default minimum TLS version. Allowed values: VersionTLS10,
# VersionTLS11, VersionTLS12, VersionTLS13
# CLI flag: -<prefix>.tls-min-version
[tls_min_version: <string> | default = ""]

tls_config

The TLS configuration.

# Path to the client certificate file, which will be used for authenticating
# with the server. Also requires the key path to be configured.
# CLI flag: -frontend.tail-tls-config.tls-cert-path
[tls_cert_path: <string> | default = ""]

# Path to the key file for the client certificate. Also requires the client
# certificate to be configured.
# CLI flag: -frontend.tail-tls-config.tls-key-path
[tls_key_path: <string> | default = ""]

# Path to the CA certificates file to validate server certificate against. If
# not set, the host's root CA certificates are used.
# CLI flag: -frontend.tail-tls-config.tls-ca-path
[tls_ca_path: <string> | default = ""]

# Override the expected name on the server certificate.
# CLI flag: -frontend.tail-tls-config.tls-server-name
[tls_server_name: <string> | default = ""]

# Skip validating server certificate.
# CLI flag: -frontend.tail-tls-config.tls-insecure-skip-verify
[tls_insecure_skip_verify: <boolean> | default = false]

# Override the default cipher suite list (separated by commas). Allowed values:
# 
# Secure Ciphers:
# - TLS_RSA_WITH_AES_128_CBC_SHA
# - TLS_RSA_WITH_AES_256_CBC_SHA
# - TLS_RSA_WITH_AES_128_GCM_SHA256
# - TLS_RSA_WITH_AES_256_GCM_SHA384
# - TLS_AES_128_GCM_SHA256
# - TLS_AES_256_GCM_SHA384
# - TLS_CHACHA20_POLY1305_SHA256
# - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
# - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
# - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
# - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
# - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
# - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
# - TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
# - TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
# 
# Insecure Ciphers:
# - TLS_RSA_WITH_RC4_128_SHA
# - TLS_RSA_WITH_3DES_EDE_CBC_SHA
# - TLS_RSA_WITH_AES_128_CBC_SHA256
# - TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
# - TLS_ECDHE_RSA_WITH_RC4_128_SHA
# - TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
# - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
# - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
# CLI flag: -frontend.tail-tls-config.tls-cipher-suites
[tls_cipher_suites: <string> | default = ""]

# Override the default minimum TLS version. Allowed values: VersionTLS10,
# VersionTLS11, VersionTLS12, VersionTLS13
# CLI flag: -frontend.tail-tls-config.tls-min-version
[tls_min_version: <string> | default = ""]

cache_config

The cache block configures the cache backend. The supported CLI flags <prefix> used to reference this configuration block are:

  • frontend
  • store.chunks-cache
  • store.index-cache-read
  • store.index-cache-write

 

# Cache config for index entry writing.(deprecated: use embedded-cache instead)
# Enable in-memory cache (auto-enabled for the chunks & query results cache if
# no other cache is configured).
# CLI flag: -<prefix>.cache.enable-fifocache
[enable_fifocache: <boolean> | default = false]

# Cache config for index entry writing.The default validity of entries for
# caches unless overridden.
# CLI flag: -<prefix>.default-validity
[default_validity: <duration> | default = 1h]

background:
  # Cache config for index entry writing.At what concurrency to write back to
  # cache.
  # CLI flag: -<prefix>.background.write-back-concurrency
  [writeback_goroutines: <int> | default = 10]

  # Cache config for index entry writing.How many key batches to buffer for
  # background write-back.
  # CLI flag: -<prefix>.background.write-back-buffer
  [writeback_buffer: <int> | default = 10000]

memcached:
  # Cache config for index entry writing.How long keys stay in the memcache.
  # CLI flag: -<prefix>.memcached.expiration
  [expiration: <duration> | default = 0s]

  # Cache config for index entry writing.How many keys to fetch in each batch.
  # CLI flag: -<prefix>.memcached.batchsize
  [batch_size: <int> | default = 1024]

  # Cache config for index entry writing.Maximum active requests to memcache.
  # CLI flag: -<prefix>.memcached.parallelism
  [parallelism: <int> | default = 100]

memcached_client:
  # Cache config for index entry writing.Hostname for memcached service to use.
  # If empty and if addresses is unset, no memcached will be used.
  # CLI flag: -<prefix>.memcached.hostname
  [host: <string> | default = ""]

  # Cache config for index entry writing.SRV service used to discover memcache
  # servers.
  # CLI flag: -<prefix>.memcached.service
  [service: <string> | default = "memcached"]

  # Cache config for index entry writing.EXPERIMENTAL: Comma separated addresses
  # list in DNS Service Discovery format:
  # https://cortexmetrics.io/docs/configuration/arguments/#dns-service-discovery
  # CLI flag: -<prefix>.memcached.addresses
  [addresses: <string> | default = ""]

  # Cache config for index entry writing.Maximum time to wait before giving up
  # on memcached requests.
  # CLI flag: -<prefix>.memcached.timeout
  [timeout: <duration> | default = 100ms]

  # Cache config for index entry writing.Maximum number of idle connections in
  # pool.
  # CLI flag: -<prefix>.memcached.max-idle-conns
  [max_idle_conns: <int> | default = 16]

  # Cache config for index entry writing.The maximum size of an item stored in
  # memcached. Bigger items are not stored. If set to 0, no maximum size is
  # enforced.
  # CLI flag: -<prefix>.memcached.max-item-size
  [max_item_size: <int> | default = 0]

  # Cache config for index entry writing.Period with which to poll DNS for
  # memcache servers.
  # CLI flag: -<prefix>.memcached.update-interval
  [update_interval: <duration> | default = 1m]

  # Cache config for index entry writing.Use consistent hashing to distribute to
  # memcache servers.
  # CLI flag: -<prefix>.memcached.consistent-hash
  [consistent_hash: <boolean> | default = true]

  # Cache config for index entry writing.Trip circuit-breaker after this number
  # of consecutive dial failures (if zero then circuit-breaker is disabled).
  # CLI flag: -<prefix>.memcached.circuit-breaker-consecutive-failures
  [circuit_breaker_consecutive_failures: <int> | default = 10]

  # Cache config for index entry writing.Duration circuit-breaker remains open
  # after tripping (if zero then 60 seconds is used).
  # CLI flag: -<prefix>.memcached.circuit-breaker-timeout
  [circuit_breaker_timeout: <duration> | default = 10s]

  # Cache config for index entry writing.Reset circuit-breaker counts after this
  # long (if zero then never reset).
  # CLI flag: -<prefix>.memcached.circuit-breaker-interval
  [circuit_breaker_interval: <duration> | default = 10s]

redis:
  # Cache config for index entry writing.Redis Server or Cluster configuration
  # endpoint to use for caching. A comma-separated list of endpoints for Redis
  # Cluster or Redis Sentinel. If empty, no redis will be used.
  # CLI flag: -<prefix>.redis.endpoint
  [endpoint: <string> | default = ""]

  # Cache config for index entry writing.Redis Sentinel master name. An empty
  # string for Redis Server or Redis Cluster.
  # CLI flag: -<prefix>.redis.master-name
  [master_name: <string> | default = ""]

  # Cache config for index entry writing.Maximum time to wait before giving up
  # on redis requests.
  # CLI flag: -<prefix>.redis.timeout
  [timeout: <duration> | default = 500ms]

  # Cache config for index entry writing.How long keys stay in the redis.
  # CLI flag: -<prefix>.redis.expiration
  [expiration: <duration> | default = 0s]

  # Cache config for index entry writing.Database index.
  # CLI flag: -<prefix>.redis.db
  [db: <int> | default = 0]

  # Cache config for index entry writing.Maximum number of connections in the
  # pool.
  # CLI flag: -<prefix>.redis.pool-size
  [pool_size: <int> | default = 0]

  # Cache config for index entry writing.Username to use when connecting to
  # redis.
  # CLI flag: -<prefix>.redis.username
  [username: <string> | default = ""]

  # Cache config for index entry writing.Password to use when connecting to
  # redis.
  # CLI flag: -<prefix>.redis.password
  [password: <string> | default = ""]

  # Cache config for index entry writing.Enable connecting to redis with TLS.
  # CLI flag: -<prefix>.redis.tls-enabled
  [tls_enabled: <boolean> | default = false]

  # Cache config for index entry writing.Skip validating server certificate.
  # CLI flag: -<prefix>.redis.tls-insecure-skip-verify
  [tls_insecure_skip_verify: <boolean> | default = false]

  # Cache config for index entry writing.Close connections after remaining idle
  # for this duration. If the value is zero, then idle connections are not
  # closed.
  # CLI flag: -<prefix>.redis.idle-timeout
  [idle_timeout: <duration> | default = 0s]

  # Cache config for index entry writing.Close connections older than this
  # duration. If the value is zero, then the pool does not close connections
  # based on age.
  # CLI flag: -<prefix>.redis.max-connection-age
  [max_connection_age: <duration> | default = 0s]

embedded_cache:
  # Cache config for index entry writing.Whether embedded cache is enabled.
  # CLI flag: -<prefix>.embedded-cache.enabled
  [enabled: <boolean> | default = false]

  # Cache config for index entry writing.Maximum memory size of the cache in MB.
  # CLI flag: -<prefix>.embedded-cache.max-size-mb
  [max_size_mb: <int> | default = 100]

  # Cache config for index entry writing.The time to live for items in the cache
  # before they get purged.
  # CLI flag: -<prefix>.embedded-cache.ttl
  [ttl: <duration> | default = 1h]

fifocache:
  # Cache config for index entry writing.Maximum memory size of the cache in
  # bytes. A unit suffix (KB, MB, GB) may be applied.
  # CLI flag: -<prefix>.fifocache.max-size-bytes
  [max_size_bytes: <string> | default = "1GB"]

  # Cache config for index entry writing.deprecated: Maximum number of entries
  # in the cache.
  # CLI flag: -<prefix>.fifocache.max-size-items
  [max_size_items: <int> | default = 0]

  # Cache config for index entry writing.The time to live for items in the cache
  # before they get purged.
  # CLI flag: -<prefix>.fifocache.ttl
  [ttl: <duration> | default = 1h]

  # Deprecated (use ttl instead): Cache config for index entry writing.The
  # expiry duration for the cache.
  # CLI flag: -<prefix>.fifocache.duration
  [validity: <duration> | default = 0s]

  # Deprecated (use max-size-items or max-size-bytes instead): Cache config for
  # index entry writing.The number of entries to cache.
  # CLI flag: -<prefix>.fifocache.size
  [size: <int> | default = 0]

  [purgeinterval: <duration>]

# The maximum number of concurrent asynchronous writeback cache can occur.
# CLI flag: -<prefix>.max-async-cache-write-back-concurrency
[async_cache_write_back_concurrency: <int> | default = 16]

# The maximum number of enqueued asynchronous writeback cache allowed.
# CLI flag: -<prefix>.max-async-cache-write-back-buffer-size
[async_cache_write_back_buffer_size: <int> | default = 500]

period_config

The period_config block configures what index schemas should be used for from specific time periods.

# The date of the first day that index buckets should be created. Use a date in
# the past if this is your only period_config, otherwise use a date when you
# want the schema to switch over. In YYYY-MM-DD format, for example: 2018-04-15.
[from: <daytime>]

# store and object_store below affect which <storage_config> key is used.
# Which store to use for the index. Either aws, aws-dynamo, gcp, bigtable,
# bigtable-hashed, cassandra, boltdb or boltdb-shipper.
[store: <string> | default = ""]

# Which store to use for the chunks. Either aws, azure, gcp, bigtable, gcs,
# cassandra, swift, filesystem or a named_store (refer to named_stores_config).
# If omitted, defaults to the same value as store.
[object_store: <string> | default = ""]

# The schema version to use, current recommended schema is v11.
[schema: <string> | default = ""]

# Configures how the index is updated and stored.
index:
  # Table prefix for all period tables.
  [prefix: <string> | default = ""]

  # Table period.
  [period: <duration>]

  # A map to be added to all managed tables.
  [tags: <map of string to string>]

# Configured how the chunks are updated and stored.
chunks:
  # Table prefix for all period tables.
  [prefix: <string> | default = ""]

  # Table period.
  [period: <duration>]

  # A map to be added to all managed tables.
  [tags: <map of string to string>]

# How many shards will be created. Only used if schema is v10 or greater.
[row_shards: <int>]

aws_storage_config

The aws_storage_config block configures the connection to dynamoDB and S3 object storage. Either one of them or both can be configured.

dynamodb:
  # DynamoDB endpoint URL with escaped Key and Secret encoded. If only region is
  # specified as a host, proper endpoint will be deduced. Use
  # inmemory:///<table-name> to use a mock in-memory implementation.
  # CLI flag: -dynamodb.url
  [dynamodb_url: <url>]

  # DynamoDB table management requests per second limit.
  # CLI flag: -dynamodb.api-limit
  [api_limit: <float> | default = 2]

  # DynamoDB rate cap to back off when throttled.
  # CLI flag: -dynamodb.throttle-limit
  [throttle_limit: <float> | default = 10]

  metrics:
    # Use metrics-based autoscaling, via this query URL
    # CLI flag: -metrics.url
    [url: <string> | default = ""]

    # Queue length above which we will scale up capacity
    # CLI flag: -metrics.target-queue-length
    [target_queue_length: <int> | default = 100000]

    # Scale up capacity by this multiple
    # CLI flag: -metrics.scale-up-factor
    [scale_up_factor: <float> | default = 1.3]

    # Ignore throttling below this level (rate per second)
    # CLI flag: -metrics.ignore-throttle-below
    [ignore_throttle_below: <float> | default = 1]

    # query to fetch ingester queue length
    # CLI flag: -metrics.queue-length-query
    [queue_length_query: <string> | default = "sum(avg_over_time(cortex_ingester_flush_queue_length{job=\"cortex/ingester\"}[2m]))"]

    # query to fetch throttle rates per table
    # CLI flag: -metrics.write-throttle-query
    [write_throttle_query: <string> | default = "sum(rate(cortex_dynamo_throttled_total{operation=\"DynamoDB.BatchWriteItem\"}[1m])) by (table) > 0"]

    # query to fetch write capacity usage per table
    # CLI flag: -metrics.usage-query
    [write_usage_query: <string> | default = "sum(rate(cortex_dynamo_consumed_capacity_total{operation=\"DynamoDB.BatchWriteItem\"}[15m])) by (table) > 0"]

    # query to fetch read capacity usage per table
    # CLI flag: -metrics.read-usage-query
    [read_usage_query: <string> | default = "sum(rate(cortex_dynamo_consumed_capacity_total{operation=\"DynamoDB.QueryPages\"}[1h])) by (table) > 0"]

    # query to fetch read errors per table
    # CLI flag: -metrics.read-error-query
    [read_error_query: <string> | default = "sum(increase(cortex_dynamo_failures_total{operation=\"DynamoDB.QueryPages\",error=\"ProvisionedThroughputExceededException\"}[1m])) by (table) > 0"]

  # Number of chunks to group together to parallelise fetches (zero to disable)
  # CLI flag: -dynamodb.chunk-gang-size
  [chunk_gang_size: <int> | default = 10]

  # Max number of chunk-get operations to start in parallel
  # CLI flag: -dynamodb.chunk.get-max-parallelism
  [chunk_get_max_parallelism: <int> | default = 32]

  backoff_config:
    # Minimum backoff time
    # CLI flag: -dynamodb.min-backoff
    [min_period: <duration> | default = 100ms]

    # Maximum backoff time
    # CLI flag: -dynamodb.max-backoff
    [max_period: <duration> | default = 50s]

    # Maximum number of times to retry an operation
    # CLI flag: -dynamodb.max-retries
    [max_retries: <int> | default = 20]

# S3 endpoint URL with escaped Key and Secret encoded. If only region is
# specified as a host, proper endpoint will be deduced. Use
# inmemory:///<bucket-name> to use a mock in-memory implementation.
# CLI flag: -s3.url
[s3: <url>]

# Set this to `true` to force the request to use path-style addressing.
# CLI flag: -s3.force-path-style
[s3forcepathstyle: <boolean> | default = false]

# Comma separated list of bucket names to evenly distribute chunks over.
# Overrides any buckets specified in s3.url flag
# CLI flag: -s3.buckets
[bucketnames: <string> | default = ""]

# S3 Endpoint to connect to.
# CLI flag: -s3.endpoint
[endpoint: <string> | default = ""]

# AWS region to use.
# CLI flag: -s3.region
[region: <string> | default = ""]

# AWS Access Key ID
# CLI flag: -s3.access-key-id
[access_key_id: <string> | default = ""]

# AWS Secret Access Key
# CLI flag: -s3.secret-access-key
[secret_access_key: <string> | default = ""]

# Disable https on s3 connection.
# CLI flag: -s3.insecure
[insecure: <boolean> | default = false]

# Enable AWS Server Side Encryption [Deprecated: Use .sse instead. if
# s3.sse-encryption is enabled, it assumes .sse.type SSE-S3]
# CLI flag: -s3.sse-encryption
[sse_encryption: <boolean> | default = false]

http_config:
  # The maximum amount of time an idle connection will be held open.
  # CLI flag: -s3.http.idle-conn-timeout
  [idle_conn_timeout: <duration> | default = 1m30s]

  # If non-zero, specifies the amount of time to wait for a server's response
  # headers after fully writing the request.
  # CLI flag: -s3.http.response-header-timeout
  [response_header_timeout: <duration> | default = 0s]

  # Set to true to skip verifying the certificate chain and hostname.
  # CLI flag: -s3.http.insecure-skip-verify
  [insecure_skip_verify: <boolean> | default = false]

  # Path to the trusted CA file that signed the SSL certificate of the S3
  # endpoint.
  # CLI flag: -s3.http.ca-file
  [ca_file: <string> | default = ""]

# The signature version to use for authenticating against S3. Supported values
# are: v4, v2.
# CLI flag: -s3.signature-version
[signature_version: <string> | default = "v4"]

sse:
  # Enable AWS Server Side Encryption. Supported values: SSE-KMS, SSE-S3.
  # CLI flag: -s3.sse.type
  [type: <string> | default = ""]

  # KMS Key ID used to encrypt objects in S3
  # CLI flag: -s3.sse.kms-key-id
  [kms_key_id: <string> | default = ""]

  # KMS Encryption Context used for object encryption. It expects JSON formatted
  # string.
  # CLI flag: -s3.sse.kms-encryption-context
  [kms_encryption_context: <string> | default = ""]

# Configures back off when S3 get Object.
backoff_config:
  # Minimum backoff time when s3 get Object
  # CLI flag: -s3.min-backoff
  [min_period: <duration> | default = 100ms]

  # Maximum backoff time when s3 get Object
  # CLI flag: -s3.max-backoff
  [max_period: <duration> | default = 3s]

  # Maximum number of times to retry when s3 get Object
  # CLI flag: -s3.max-retries
  [max_retries: <int> | default = 5]

azure_storage_config

The azure_storage_config block configures the connection to Azure object storage backend. The supported CLI flags <prefix> used to reference this configuration block are:

  • common.storage
  • ruler.storage

 

# Azure Cloud environment. Supported values are: AzureGlobal, AzureChinaCloud,
# AzureGermanCloud, AzureUSGovernment.
# CLI flag: -<prefix>.azure.environment
[environment: <string> | default = "AzureGlobal"]

# Azure storage account name.
# CLI flag: -<prefix>.azure.account-name
[account_name: <string> | default = ""]

# Azure storage account key.
# CLI flag: -<prefix>.azure.account-key
[account_key: <string> | default = ""]

# Name of the storage account blob container used to store chunks. This
# container must be created before running cortex.
# CLI flag: -<prefix>.azure.container-name
[container_name: <string> | default = "loki"]

# Azure storage endpoint suffix without schema. The storage account name will be
# prefixed to this value to create the FQDN.
# CLI flag: -<prefix>.azure.endpoint-suffix
[endpoint_suffix: <string> | default = ""]

# Use Managed Identity to authenticate to the Azure storage account.
# CLI flag: -<prefix>.azure.use-managed-identity
[use_managed_identity: <boolean> | default = false]

# Use Federated Token to authenticate to the Azure storage account.
# CLI flag: -<prefix>.azure.use-federated-token
[use_federated_token: <boolean> | default = false]

# User assigned identity ID to authenticate to the Azure storage account.
# CLI flag: -<prefix>.azure.user-assigned-id
[user_assigned_id: <string> | default = ""]

# Use Service Principal to authenticate through Azure OAuth.
# CLI flag: -<prefix>.azure.use-service-principal
[use_service_principal: <boolean> | default = false]

# Azure Service Principal ID(GUID).
# CLI flag: -<prefix>.azure.client-id
[client_id: <string> | default = ""]

# Azure Service Principal secret key.
# CLI flag: -<prefix>.azure.client-secret
[client_secret: <string> | default = ""]

# Azure Tenant ID is used to authenticate through Azure OAuth.
# CLI flag: -<prefix>.azure.tenant-id
[tenant_id: <string> | default = ""]

# Chunk delimiter for blob ID to be used
# CLI flag: -<prefix>.azure.chunk-delimiter
[chunk_delimiter: <string> | default = "-"]

# Preallocated buffer size for downloads.
# CLI flag: -<prefix>.azure.download-buffer-size
[download_buffer_size: <int> | default = 512000]

# Preallocated buffer size for uploads.
# CLI flag: -<prefix>.azure.upload-buffer-size
[upload_buffer_size: <int> | default = 256000]

# Number of buffers used to used to upload a chunk.
# CLI flag: -<prefix>.azure.download-buffer-count
[upload_buffer_count: <int> | default = 1]

# Timeout for requests made against azure blob storage.
# CLI flag: -<prefix>.azure.request-timeout
[request_timeout: <duration> | default = 30s]

# Number of retries for a request which times out.
# CLI flag: -<prefix>.azure.max-retries
[max_retries: <int> | default = 5]

# Minimum time to wait before retrying a request.
# CLI flag: -<prefix>.azure.min-retry-delay
[min_retry_delay: <duration> | default = 10ms]

# Maximum time to wait before retrying a request.
# CLI flag: -<prefix>.azure.max-retry-delay
[max_retry_delay: <duration> | default = 500ms]

gcs_storage_config

The gcs_storage_config block configures the connection to Google Cloud Storage object storage backend. The supported CLI flags <prefix> used to reference this configuration block are:

  • common.storage
  • ruler.storage

 

# Name of GCS bucket. Please refer to
# https://cloud.google.com/docs/authentication/production for more information
# about how to configure authentication.
# CLI flag: -<prefix>.gcs.bucketname
[bucket_name: <string> | default = ""]

# Service account key content in JSON format, refer to
# https://cloud.google.com/iam/docs/creating-managing-service-account-keys for
# creation.
# CLI flag: -<prefix>.gcs.service-account
[service_account: <string> | default = ""]

# The size of the buffer that GCS client for each PUT request. 0 to disable
# buffering.
# CLI flag: -<prefix>.gcs.chunk-buffer-size
[chunk_buffer_size: <int> | default = 0]

# The duration after which the requests to GCS should be timed out.
# CLI flag: -<prefix>.gcs.request-timeout
[request_timeout: <duration> | default = 0s]

# Enable OpenCensus (OC) instrumentation for all requests.
# CLI flag: -<prefix>.gcs.enable-opencensus
[enable_opencensus: <boolean> | default = true]

# Enable HTTP2 connections.
# CLI flag: -<prefix>.gcs.enable-http2
[enable_http2: <boolean> | default = true]

s3_storage_config

The s3_storage_config block configures the connection to Amazon S3 object storage backend. The supported CLI flags <prefix> used to reference this configuration block are:

  • common
  • ruler

 

# S3 endpoint URL with escaped Key and Secret encoded. If only region is
# specified as a host, proper endpoint will be deduced. Use
# inmemory:///<bucket-name> to use a mock in-memory implementation.
# CLI flag: -<prefix>.storage.s3.url
[s3: <url>]

# Set this to `true` to force the request to use path-style addressing.
# CLI flag: -<prefix>.storage.s3.force-path-style
[s3forcepathstyle: <boolean> | default = false]

# Comma separated list of bucket names to evenly distribute chunks over.
# Overrides any buckets specified in s3.url flag
# CLI flag: -<prefix>.storage.s3.buckets
[bucketnames: <string> | default = ""]

# S3 Endpoint to connect to.
# CLI flag: -<prefix>.storage.s3.endpoint
[endpoint: <string> | default = ""]

# AWS region to use.
# CLI flag: -<prefix>.storage.s3.region
[region: <string> | default = ""]

# AWS Access Key ID
# CLI flag: -<prefix>.storage.s3.access-key-id
[access_key_id: <string> | default = ""]

# AWS Secret Access Key
# CLI flag: -<prefix>.storage.s3.secret-access-key
[secret_access_key: <string> | default = ""]

# Disable https on s3 connection.
# CLI flag: -<prefix>.storage.s3.insecure
[insecure: <boolean> | default = false]

# Enable AWS Server Side Encryption [Deprecated: Use .sse instead. if
# s3.sse-encryption is enabled, it assumes .sse.type SSE-S3]
# CLI flag: -<prefix>.storage.s3.sse-encryption
[sse_encryption: <boolean> | default = false]

http_config:
  # The maximum amount of time an idle connection will be held open.
  # CLI flag: -<prefix>.storage.s3.http.idle-conn-timeout
  [idle_conn_timeout: <duration> | default = 1m30s]

  # If non-zero, specifies the amount of time to wait for a server's response
  # headers after fully writing the request.
  # CLI flag: -<prefix>.storage.s3.http.response-header-timeout
  [response_header_timeout: <duration> | default = 0s]

  # Set to true to skip verifying the certificate chain and hostname.
  # CLI flag: -<prefix>.storage.s3.http.insecure-skip-verify
  [insecure_skip_verify: <boolean> | default = false]

  # Path to the trusted CA file that signed the SSL certificate of the S3
  # endpoint.
  # CLI flag: -<prefix>.storage.s3.http.ca-file
  [ca_file: <string> | default = ""]

# The signature version to use for authenticating against S3. Supported values
# are: v4, v2.
# CLI flag: -<prefix>.storage.s3.signature-version
[signature_version: <string> | default = "v4"]

sse:
  # Enable AWS Server Side Encryption. Supported values: SSE-KMS, SSE-S3.
  # CLI flag: -<prefix>.storage.s3.sse.type
  [type: <string> | default = ""]

  # KMS Key ID used to encrypt objects in S3
  # CLI flag: -<prefix>.storage.s3.sse.kms-key-id
  [kms_key_id: <string> | default = ""]

  # KMS Encryption Context used for object encryption. It expects JSON formatted
  # string.
  # CLI flag: -<prefix>.storage.s3.sse.kms-encryption-context
  [kms_encryption_context: <string> | default = ""]

# Configures back off when S3 get Object.
backoff_config:
  # Minimum backoff time when s3 get Object
  # CLI flag: -<prefix>.storage.s3.min-backoff
  [min_period: <duration> | default = 100ms]

  # Maximum backoff time when s3 get Object
  # CLI flag: -<prefix>.storage.s3.max-backoff
  [max_period: <duration> | default = 3s]

  # Maximum number of times to retry when s3 get Object
  # CLI flag: -<prefix>.storage.s3.max-retries
  [max_retries: <int> | default = 5]

bos_storage_config

The bos_storage_config block configures the connection to Baidu Object Storage (BOS) object storage backend. The supported CLI flags <prefix> used to reference this configuration block are:

  • common.storage
  • ruler.storage

 

# Name of BOS bucket.
# CLI flag: -<prefix>.bos.bucket-name
[bucket_name: <string> | default = ""]

# BOS endpoint to connect to.
# CLI flag: -<prefix>.bos.endpoint
[endpoint: <string> | default = "bj.bcebos.com"]

# Baidu Cloud Engine (BCE) Access Key ID.
# CLI flag: -<prefix>.bos.access-key-id
[access_key_id: <string> | default = ""]

# Baidu Cloud Engine (BCE) Secret Access Key.
# CLI flag: -<prefix>.bos.secret-access-key
[secret_access_key: <string> | default = ""]

swift_storage_config

The swift_storage_config block configures the connection to OpenStack Object Storage (Swift) object storage backend. The supported CLI flags <prefix> used to reference this configuration block are:

  • common.storage
  • ruler.storage

 

# OpenStack Swift authentication API version. 0 to autodetect.
# CLI flag: -<prefix>.swift.auth-version
[auth_version: <int> | default = 0]

# OpenStack Swift authentication URL
# CLI flag: -<prefix>.swift.auth-url
[auth_url: <string> | default = ""]

# OpenStack Swift username.
# CLI flag: -<prefix>.swift.username
[username: <string> | default = ""]

# OpenStack Swift user's domain name.
# CLI flag: -<prefix>.swift.user-domain-name
[user_domain_name: <string> | default = ""]

# OpenStack Swift user's domain ID.
# CLI flag: -<prefix>.swift.user-domain-id
[user_domain_id: <string> | default = ""]

# OpenStack Swift user ID.
# CLI flag: -<prefix>.swift.user-id
[user_id: <string> | default = ""]

# OpenStack Swift API key.
# CLI flag: -<prefix>.swift.password
[password: <string> | default = ""]

# OpenStack Swift user's domain ID.
# CLI flag: -<prefix>.swift.domain-id
[domain_id: <string> | default = ""]

# OpenStack Swift user's domain name.
# CLI flag: -<prefix>.swift.domain-name
[domain_name: <string> | default = ""]

# OpenStack Swift project ID (v2,v3 auth only).
# CLI flag: -<prefix>.swift.project-id
[project_id: <string> | default = ""]

# OpenStack Swift project name (v2,v3 auth only).
# CLI flag: -<prefix>.swift.project-name
[project_name: <string> | default = ""]

# ID of the OpenStack Swift project's domain (v3 auth only), only needed if it
# differs the from user domain.
# CLI flag: -<prefix>.swift.project-domain-id
[project_domain_id: <string> | default = ""]

# Name of the OpenStack Swift project's domain (v3 auth only), only needed if it
# differs from the user domain.
# CLI flag: -<prefix>.swift.project-domain-name
[project_domain_name: <string> | default = ""]

# OpenStack Swift Region to use (v2,v3 auth only).
# CLI flag: -<prefix>.swift.region-name
[region_name: <string> | default = ""]

# Name of the OpenStack Swift container to put chunks in.
# CLI flag: -<prefix>.swift.container-name
[container_name: <string> | default = ""]

# Max retries on requests error.
# CLI flag: -<prefix>.swift.max-retries
[max_retries: <int> | default = 3]

# Time after which a connection attempt is aborted.
# CLI flag: -<prefix>.swift.connect-timeout
[connect_timeout: <duration> | default = 10s]

# Time after which an idle request is aborted. The timeout watchdog is reset
# each time some data is received, so the timeout triggers after X time no data
# is received on a request.
# CLI flag: -<prefix>.swift.request-timeout
[request_timeout: <duration> | default = 5s]

local_storage_config

The local_storage_config block configures the usage of local file system as object storage backend.

# Directory to store chunks in.
# CLI flag: -local.chunk-directory
[directory: <string> | default = ""]

named_stores_config

Configures additional object stores for a given storage provider. Supported stores: aws, azure, bos, filesystem, gcs, swift. Example: storage_config: named_stores: aws: store-1: endpoint: s3://foo-bucket region: us-west1 Named store from this example can be used by setting object_store to store-1 in period_config.

[aws: <map of string to aws_storage_config>]

[azure: <map of string to azure_storage_config>]

[bos: <map of string to bos_storage_config>]

[filesystem: <map of string to local_storage_config>]

[gcs: <map of string to gcs_storage_config>]

[swift: <map of string to swift_storage_config>]

Runtime Configuration file

Loki has a concept of “runtime config” file, which is simply a file that is reloaded while Loki is running. It is used by some Loki components to allow operator to change some aspects of Loki configuration without restarting it. File is specified by using -runtime-config.file=<filename> flag and reload period (which defaults to 10 seconds) can be changed by -runtime-config.reload-period=<duration> flag. Previously this mechanism was only used by limits overrides, and flags were called -limits.per-user-override-config=<filename> and -limits.per-user-override-period=10s respectively. These are still used, if -runtime-config.file=<filename> is not specified.

At the moment, two components use runtime configuration: limits and multi KV store.

Options for runtime configuration reload can also be configured via YAML:

# Configuration file to periodically check and reload.
[file: <string>: default = empty]

# How often to check the file.
[period: <duration>: default 10s]

Example runtime configuration file:

overrides:
  tenant1:
    ingestion_rate_mb: 10
    max_streams_per_user: 100000
    max_chunks_per_query: 100000
  tenant2:
    max_streams_per_user: 1000000
    max_chunks_per_query: 1000000

multi_kv_config:
    mirror-enabled: false
    primary: consul

Accept out-of-order writes

Since the beginning of Loki, log entries had to be written to Loki in order by time. This limitation has been lifted. Out-of-order writes are enabled globally by default, but can be disabled/enabled on a cluster or per-tenant basis.

  • To disable out-of-order writes for all tenants, place in the limits_config section:

    limits_config:
        unordered_writes: false
    
  • To disable out-of-order writes for specific tenants, configure a runtime configuration file:

    runtime_config: overrides.yaml
    

    In the overrides.yaml file, add unordered_writes for each tenant permitted to have out-of-order writes:

    overrides:
      "tenantA":
        unordered_writes: false
    

How far into the past accepted out-of-order log entries may be is configurable with max_chunk_age. max_chunk_age defaults to 2 hour. Loki calculates the earliest time that out-of-order entries may have and be accepted with

time_of_most_recent_line - (max_chunk_age/2)

Log entries with timestamps that are after this earliest time are accepted. Log entries further back in time return an out-of-order error.

For example, if max_chunk_age is 2 hours and the stream {foo="bar"} has one entry at 8:00, Loki will accept data for that stream as far back in time as 7:00. If another log line is written at 10:00, Loki will accept data for that stream as far back in time as 9:00.