»Prometheus APM Plugin

The prometheus APM plugin allows querying for metrics stored in a Prometheus server.

»Agent Configuration Options

apm "prometheus" {
  driver = "prometheus"

  config = {
    address = "http://prometheus.my.endpoint.io:9090"

    ca_cert = "/path/to/ca.crt"

    basic_auth_user     = "user"
    basic_auth_password = "secret"

    header_X-Scope-OrgID   = "my-org"
    header_X-Custom-Header = "custom-header"
  }
}

apm "prometheus" {
  driver = "prometheus"

  config = {
    address = "http://prometheus.my.endpoint.io:9090"

    ca_cert = "/path/to/ca.crt"

    basic_auth_user     = "user"
    basic_auth_password = "secret"

    header_X-Scope-OrgID   = "my-org"
    header_X-Custom-Header = "custom-header"
  }
}

• address (string: "http://127.0.0.1:9090") - The address of the Prometheus endpoint used to perform queries.

• basic_auth_user (string: "") - The HTTP basic auth user to use when making requests to Prometheus.

• basic_auth_password (string: "") - The HTTP basic auth password to use when making requests to Prometheus.

• ca_cert (string: "") - Path to a PEM encoded CA cert file to use to connect to the Prometheus server.

• header_* (string: "") - Additional HTTP headers to set when making requests to Prometheus. Several headers may be specified and the final header name will be set as the key with the header_ prefix removed.

• skip_verify (bool: false) - Do not verify TLS certificates when connecting to the Prometheus server. This is strongly discouraged.

»Policy Configuration Options

check {
  source = "prometheus"
  query  = "avg((haproxy_server_current_sessions{backend=\"http_back\"}))"
  # ...
}

check {
  source = "prometheus"
  query  = "avg((haproxy_server_current_sessions{backend=\"http_back\"}))"
  # ...
}