/docker/otel-collector/config.yaml

extensions:
  health_check:
    endpoint: 0.0.0.0:13133
  basicauth/grafana_cloud:
    client_auth:
      username: ${env:GRAFANA_CLOUD_INSTANCE_ID}
      password: ${env:GRAFANA_CLOUD_API_KEY}

receivers:
  otlp:
    protocols:
      grpc:
        endpoint: 0.0.0.0:4317
      http:
        endpoint: 0.0.0.0:4318

processors:
  # Percentage limits are calculated against the collector container memory limit.
  # Keep docker-compose.yml/Coolify memory limit set for predictability.
  memory_limiter:
    check_interval: 1s
    limit_percentage: 80
    spike_limit_percentage: 25

  attributes/scrub:
    actions:
      - key: http.request.header.authorization
        action: delete
      - key: http.request.header.cookie
        action: delete
      - key: db.statement
        action: delete

  tail_sampling:
    decision_wait: 10s
    num_traces: 50000
    expected_new_traces_per_sec: 100
    policies:
      - name: errors
        type: status_code
        status_code:
          status_codes: [ERROR]
      - name: slow-requests
        type: latency
        latency:
          threshold_ms: 500
      - name: baseline
        type: probabilistic
        probabilistic:
          sampling_percentage: 100

  batch:
    timeout: 5s
    send_batch_size: 1024
    send_batch_max_size: 2048

exporters:
  otlp_http/grafana_cloud:
    endpoint: ${env:GRAFANA_CLOUD_OTLP_ENDPOINT}
    auth:
      authenticator: basicauth/grafana_cloud
    sending_queue:
      enabled: true
      queue_size: 10000
    retry_on_failure:
      enabled: true
      initial_interval: 5s
      max_interval: 30s
      max_elapsed_time: 300s

service:
  extensions: [health_check, basicauth/grafana_cloud]
  pipelines:
    traces:
      receivers: [otlp]
      processors: [memory_limiter, attributes/scrub, tail_sampling, batch]
      exporters: [otlp_http/grafana_cloud]
    metrics:
      receivers: [otlp]
      processors: [memory_limiter, batch]
      exporters: [otlp_http/grafana_cloud]