opamp-core

Prometheus And Collector Setup For Provider Metrics

This page shows how to scrape the provider metrics endpoint from Prometheus or an OpenTelemetry Collector.

Endpoint summary

• Metrics scrape endpoint: GET /metrics
• Internal graph endpoint: GET /api/metrics/graphs
• Both endpoints are disabled when provider.metrics.enabled=false.
• /metrics follows the provider’s non-OpAMP auth mode, so it is protected by provider.ui-use-authorization.

Recommended provider configuration

For machine-to-machine scraping, the simplest secure setup is a static bearer token:

{
  "provider": {
    "ui-use-authorization": "config-token",
    "metrics": {
      "enabled": true,
      "graph_history_minutes": 15
    },
    "tls": {
      "cert_file": "/etc/opamp/provider.pem",
      "key_file": "/etc/opamp/provider-key.pem"
    }
  }
}

Environment:

export UI_AUTH_STATIC_TOKEN="replace-with-a-scrape-token"

Why this is usually the best fit:

• Prometheus and the OpenTelemetry Collector both work well with bearer-token auth.
• It avoids browser-oriented login flows.
• It keeps /metrics protected without changing the OpAMP transport auth mode.

If your environment already uses an identity provider for non-OpAMP routes, provider.ui-use-authorization=idp also works, but the scraper must then send a valid bearer token accepted by that IdP configuration.

Prometheus example

global:
  scrape_interval: 30s

scrape_configs:
  - job_name: opamp-provider
    scheme: https
    metrics_path: /metrics
    static_configs:
      - targets:
          - opamp.example.org:8443
    authorization:
      type: Bearer
      credentials: ${OPAMP_PROVIDER_METRICS_TOKEN}
    tls_config:
      ca_file: /etc/prometheus/certs/provider-ca.pem

Adjust as needed:

• Use scheme: http if you are not terminating TLS on the provider or an upstream proxy.
• Use port 8080 or your configured provider port when running the default local setup.
• If you leave provider.ui-use-authorization=none, remove the authorization block.

OpenTelemetry Collector example

The Collector’s Prometheus receiver accepts Prometheus-style scrape_configs, so the setup is very similar:

receivers:
  prometheus:
    config:
      scrape_configs:
        - job_name: opamp-provider
          scheme: https
          metrics_path: /metrics
          static_configs:
            - targets:
                - opamp.example.org:8443
          authorization:
            type: Bearer
            credentials: REPLACE_WITH_SCRAPE_TOKEN
          tls_config:
            ca_file: /etc/otel/certs/provider-ca.pem

processors:
  batch: {}

exporters:
  debug: {}

service:
  pipelines:
    metrics:
      receivers: [prometheus]
      processors: [batch]
      exporters: [debug]

Notes:

• Replace debug with your real metrics exporter.
• If you already centralize secrets for the Collector, inject the bearer token through your normal configuration management path rather than hard-coding it.

Local development example

If you are using the repository default config from config/opamp.json, the provider currently exposes:

• port 8080
• /metrics
• provider.metrics.enabled=true
• provider.metrics.graph_history_minutes=0
• provider.ui-use-authorization=none

That means a local Prometheus scrape can be as small as:

scrape_configs:
  - job_name: opamp-provider-local
    static_configs:
      - targets:
          - localhost:8080

Internal graph data for product dashboards

If you want the provider itself to retain gauge history for built-in dashboards:

{
  "provider": {
    "metrics": {
      "enabled": true,
      "graph_history_minutes": 15
    }
  }
}

Behavior:

• graph_history_minutes=0: no in-memory time-series retention
• graph_history_minutes>0: retained gauge history is available from /api/metrics/graphs

Example query:

/api/metrics/graphs?metric=opamp_provider_clients_total

Troubleshooting

• 401 Unauthorized from /metrics: check provider.ui-use-authorization and the bearer token used by the scraper.
• 404 from /metrics: check provider.metrics.enabled.
• TLS errors: verify the provider certificate chain and the scraper CA file.
• Empty internal series arrays: check whether provider.metrics.graph_history_minutes is still 0.

References

• Repository docs:
  • Provider metrics reference
  • Authentication
  • Provider config reference
• External docs:
  • Prometheus configuration: https://prometheus.io/docs/prometheus/latest/configuration/configuration/
  • Prometheus scrape and HTTP auth settings: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#scrape_config
  • OpenTelemetry Collector Prometheus receiver: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/prometheusreceiver
  • OpAMP specification: https://opentelemetry.io/docs/specs/opamp/

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