signoz/pkg/query-service/app/integrations/builtin_integrations/postgres/config/collect-metrics.md

Collect Postgres Metrics

You can configure Postgres metrics collection by providing the required collector config to your collector.

Create collector config file

Save the following config for collecting postgres metrics in a file named postgres-metrics-collection-config.yaml

receivers:
  postgresql:
    # The endpoint of the postgresql server. Whether using TCP or Unix sockets, this value should be host:port. If transport is set to unix, the endpoint will internally be translated from host:port to /host.s.PGSQL.port
    endpoint: ${env:POSTGRESQL_ENDPOINT}
    # The frequency at which to collect metrics from the Postgres instance.
    collection_interval: 60s
    # The username used to access the postgres instance
    username: ${env:POSTGRESQL_USERNAME}
    # The password used to access the postgres instance
    password: ${env:POSTGRESQL_PASSWORD}
    # The list of databases for which the receiver will attempt to collect statistics. If an empty list is provided, the receiver will attempt to collect statistics for all non-template databases
    databases: []
    # # Defines the network to use for connecting to the server. Valid Values are `tcp` or `unix`
    # transport: tcp
    tls:
      # set to false if SSL is enabled on the server
      insecure: true
    #   ca_file: /etc/ssl/certs/ca-certificates.crt
    #   cert_file: /etc/ssl/certs/postgres.crt
    #   key_file: /etc/ssl/certs/postgres.key
    metrics:
      postgresql.database.locks:
        enabled: true
      postgresql.deadlocks:
        enabled: true
      postgresql.sequential_scans:
        enabled: true

processors:
  # enriches the data with additional host information
  # see https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/processor/resourcedetectionprocessor#resource-detection-processor
  resourcedetection/system:
    # add additional detectors if needed
    detectors: ["system"]
    system:
      hostname_sources: ["os"]

exporters:
  # export to SigNoz cloud
  otlp/postgres:
    endpoint: "${env:OTLP_DESTINATION_ENDPOINT}"
    tls:
      insecure: false
    headers:
      "signoz-access-token": "${env:SIGNOZ_INGESTION_KEY}"

  # export to local collector
  # otlp/postgres:
  #   endpoint: "localhost:4317"
  #   tls:
  #     insecure: true

service:
  pipelines:
    metrics/postgresql:
      receivers: [postgresql]
      # note: remove this processor if the collector host is not running on the same host as the postgres instance
      processors: [resourcedetection/system]
      exporters: [otlp/postgres]

Set Environment Variables

Set the following environment variables in your otel-collector environment:

# password for Postgres monitoring user"
export POSTGRESQL_USERNAME="monitoring"

# password for Postgres monitoring user"
export POSTGRESQL_PASSWORD="<PASSWORD>"

# Postgres endpoint reachable from the otel collector"
export POSTGRESQL_ENDPOINT="host:port"


# region specific SigNoz cloud ingestion endpoint
export OTLP_DESTINATION_ENDPOINT="ingest.us.signoz.cloud:443"

# your SigNoz ingestion key
export SIGNOZ_INGESTION_KEY="signoz-ingestion-key"

Use collector config file

Make the collector config file available to your otel collector and use it by adding the following flag to the command for running your collector

--config postgres-metrics-collection-config.yaml

Note: the collector can use multiple config files, specified by multiple occurrences of the --config flag.