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Documentation Grafana Alloy Reference Components discovery discovery.puppetdb

discovery.puppetdb

discovery.puppetdb allows you to retrieve scrape targets from PuppetDB resources.

This SD discovers resources and will create a target for each resource returned by the API.

The resource address is the certname of the resource, and can be changed during relabeling.

The queries for this component are expected to be valid PQL (Puppet Query Language).

Usage

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discovery.puppetdb "LABEL" {
  url = PUPPET_SERVER
}

Arguments

The following arguments are supported:

At most, one of the following can be provided:

• bearer_token argument.
• bearer_token_file argument.
• basic_auth block.
• authorization block.
• oauth2 block.

no_proxy can contain IPs, CIDR notations, and domain names. IP and domain names can contain port numbers. proxy_url must be configured if no_proxy is configured.

proxy_from_environment uses the environment variables HTTP_PROXY, HTTPS_PROXY, and NO_PROXY (or the lowercase versions thereof). Requests use the proxy from the environment variable matching their scheme, unless excluded by NO_PROXY. proxy_url and no_proxy must not be configured if proxy_from_environment is configured.

proxy_connect_header should only be configured if proxy_url or proxy_from_environment are configured.

Blocks

The following blocks are supported inside the definition of discovery.puppetdb:

The > symbol indicates deeper levels of nesting. For example, oauth2 > tls_config refers to a tls_config block defined inside an oauth2 block.

basic_auth block

password and password_file are mutually exclusive, and only one can be provided inside a basic_auth block.

authorization block

credential and credentials_file are mutually exclusive, and only one can be provided inside an authorization block.

oauth2 block

client_secret and client_secret_file are mutually exclusive, and only one can be provided inside an oauth2 block.

The oauth2 block may also contain a separate tls_config sub-block.

no_proxy can contain IPs, CIDR notations, and domain names. IP and domain names can contain port numbers. proxy_url must be configured if no_proxy is configured.

proxy_from_environment uses the environment variables HTTP_PROXY, HTTPS_PROXY, and NO_PROXY (or the lowercase versions thereof). Requests use the proxy from the environment variable matching their scheme, unless excluded by NO_PROXY. proxy_url and no_proxy must not be configured if proxy_from_environment is configured.

proxy_connect_header should only be configured if proxy_url or proxy_from_environment are configured.

tls_config block

The following pairs of arguments are mutually exclusive and can’t both be set simultaneously:

• ca_pem and ca_file
• cert_pem and cert_file
• key_pem and key_file

When configuring client authentication, both the client certificate (using cert_pem or cert_file) and the client key (using key_pem or key_file) must be provided.

When min_version isn’t provided, the minimum acceptable TLS version is inherited from Go’s default minimum version, TLS 1.2. If min_version is provided, it must be set to one of the following strings:

• "TLS10" (TLS 1.0)
• "TLS11" (TLS 1.1)
• "TLS12" (TLS 1.2)
• "TLS13" (TLS 1.3)

Exported fields

The following fields are exported and can be referenced by other components:

Each target includes the following labels:

• __meta_puppetdb_query: the Puppet Query Language (PQL) query.
• __meta_puppetdb_certname: the name of the node associated with the resourcet.
• __meta_puppetdb_resource: a SHA-1 hash of the resource’s type, title, and parameters, for identification.
• __meta_puppetdb_type: the resource type.
• __meta_puppetdb_title: the resource title.
• __meta_puppetdb_exported: whether the resource is exported (“true” or “false”).
• __meta_puppetdb_tags: comma separated list of resource tags.
• __meta_puppetdb_file: the manifest file in which the resource was declared.
• __meta_puppetdb_environment: the environment of the node associated with the resource.
• __meta_puppetdb_parameter_<parametername>: the parameters of the resource.

Component health

discovery.puppetdb is only reported as unhealthy when given an invalid configuration. In those cases, exported fields retain their last healthy values.

Debug information

discovery.puppetdb does not expose any component-specific debug information.

Debug metrics

discovery.puppetdb does not expose any component-specific debug metrics.

Example

This example discovers targets from puppetdb for all the servers that have a specific package defined:

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discovery.puppetdb "example" {
	url   = "http://puppetdb.local:8080"
	query = "resources { type = \"Package\" and title = \"node_exporter\" }"
	port  = 9100
}

prometheus.scrape "demo" {
	targets    = discovery.puppetdb.example.targets
	forward_to = [prometheus.remote_write.demo.receiver]
}

prometheus.remote_write "demo" {
	endpoint {
		url = PROMETHEUS_REMOTE_WRITE_URL

		basic_auth {
			username = USERNAME
			password = PASSWORD
		}
	}
}

Replace the following:

• PROMETHEUS_REMOTE_WRITE_URL: The URL of the Prometheus remote_write-compatible server to send metrics to.
• USERNAME: The username to use for authentication to the remote_write API.
• PASSWORD: The password to use for authentication to the remote_write API.

Compatible components

discovery.puppetdb has exports that can be consumed by the following components:

• Components that consume Targets