Create a config file
The Grafana Agent supports configuring multiple independent “subsystems.” Each subsystem helps you collect data for a specific type of telemetry.
- The Prometheus subsystem allows you collect metrics to send to Prometheus.
- The Loki subsystem allows you to collect logs to send to Grafana Loki.
- The Tempo subsystem allows you to collect spans to send to Grafana Tempo.
- The Integrations subsystem allows you to collect metrics for common applications, such as MySQL.
Integrations are recommended for first-time users of observability platforms, especially newcomers to Prometheus. Users with more experience with Prometheus or users that already have an existing Prometheus config file can configure the Prometheus subsystem manually.
Integrations are individual features that collect metrics for you. For
agent integration collects metrics from that running instance of
the Grafana Agent. The
node_exporter integration will collect metrics from the
Linux machine that the Grafana Agent is running on.
prometheus: wal_directory: /tmp/wal global: remote_write: - url: http://localhost:9009/api/prom/push integrations: agent: enabled: true
In this example, we first must configure the
wal_directory which is used to
store metrics in a Write-Ahead Log. This is required, but ensures that samples
will be resent in case of failure (e.g., network issues, machine reboot). We
remote_write, which is where all metrics should be sent by
Then, the individual
integrations are configured. In this example, just the
agent integration is enabled. Finally,
prometheus_remote_write is configured
with a location to send metrics. You will have to replace this URL with the
appropriate URL for your
remote_write system (such as a Grafana Cloud Hosted
When the Agent is run with this file, it will collect metrics from itself and
send those metrics to the default
remote_write endpoint. All metrics from
integrations will have an
instance label matching the hostname of the machine
the Grafana Agent is running on. This label helps to uniquely identify the
source of metrics if you are running multiple Grafana Agents across multiple
Full configuration options can be found in the configuration reference.
Prometheus config/migrating from Prometheus
The Prometheus subsystem config is useful for those migrating from Prometheus and those who want to scrape metrics from something that currently does not have an associated integration.
To migrate from an existing Prometheus config, use this Agent config as a template and copy and paste subsections from your existing Prometheus config into it:
prometheus: global: # PASTE PROMETHEUS global SECTION HERE configs: - name: agent scrape_configs: # PASTE scrape_configs SECTION HERE remote_write: # PASTE remote_write SECTION HERE
For example, this configuration file configures the Grafana Agent to scrape itself without using the integration:
server: log_level: info http_listen_port: 12345 prometheus: global: scrape_interval: 5s configs: - name: agent scrape_configs: - job_name: agent static_configs: - targets: ['127.0.0.1:12345'] remote_write: - url: http://localhost:9009/api/prom/push
Like with integrations, full configuration options can be found in the configuration.
Loki Config/Migrating from Promtail
The Loki Config allows for collecting logs to send to a Loki API. Users that are familiar with Promtail will notice that the Loki config for the Agent matches their existing Promtail config with the following exceptions:
- The deprecated field
clientis not present
serverfield is not present
To migrate from an existing Promtail config, make sure you are using
client and remove the
server block if present. Then paste your
Promtail config into the Agent config file inside of a
loki: configs: - name: default # PASTE YOUR PROMTAIL CONFIG INSIDE OF HERE
Full config example
Here is an example full config file, using integrations, Prometheus, Loki, and Tempo:
server: log_level: info http_listen_port: 12345 prometheus: global: scrape_interval: 5s remote_write: - url: http://localhost:9009/api/prom/push configs: - name: default scrape_configs: - job_name: agent static_configs: - targets: ['127.0.0.1:12345'] loki: configs: - name: default positions: filename: /tmp/positions.yaml scrape_configs: - job_name: varlogs static_configs: - targets: [localhost] labels: job: varlogs __path__: /var/log/*log clients: - url: http://localhost:3100/loki/api/v1/push tempo: configs: - name: default receivers: jaeger: protocols: grpc: # listens on the default jaeger grpc port: 14250 remote_write: - endpoint: localhost:55680 insecure: true # only add this if TLS is not required queue: retry_on_failure: true batch: timeout: 5s send_batch_size: 100 integrations: node_exporter: enabled: true