x-defaults: &defaults
  restart: unless-stopped
  logging:
    driver: json-file
    options:
      max-size: 100m
      max-file: '3'

services:
  otel-collector:
    <<: *defaults
    image: ${GLOBAL_REGISTRY:-}otel/opentelemetry-collector-contrib:${OTEL_COLLECTOR_VERSION:-0.115.1}
    command:
      - --config=/etc/otelcol-contrib/config.yaml
    volumes:
      - ./config.yaml:/etc/otelcol-contrib/config.yaml:ro
    ports:
      # OTLP gRPC receiver
      - '${OTEL_COLLECTOR_OTLP_GRPC_PORT_OVERRIDE:-4317}:4317'
      # OTLP HTTP receiver
      - '${OTEL_COLLECTOR_OTLP_HTTP_PORT_OVERRIDE:-4318}:4318'
      # Jaeger gRPC receiver
      - '${OTEL_COLLECTOR_JAEGER_GRPC_PORT_OVERRIDE:-14250}:14250'
      # Jaeger Thrift HTTP receiver
      - '${OTEL_COLLECTOR_JAEGER_THRIFT_HTTP_PORT_OVERRIDE:-14268}:14268'
      # Zipkin receiver
      - '${OTEL_COLLECTOR_ZIPKIN_PORT_OVERRIDE:-9411}:9411'
      # Prometheus metrics
      - '${OTEL_COLLECTOR_PROMETHEUS_PORT_OVERRIDE:-8888}:8888'
      # Health check extension
      - '${OTEL_COLLECTOR_HEALTH_CHECK_PORT_OVERRIDE:-13133}:13133'
    environment:
      - TZ=${TZ:-UTC}
      # Optional: Configure memory limit for the collector
      - GOMEMLIMIT=${OTEL_COLLECTOR_GOMEMLIMIT:-}
    user: '10001:10001' # Non-root user
    deploy:
      resources:
        limits:
          cpus: ${OTEL_COLLECTOR_CPU_LIMIT:-1.0}
          memory: ${OTEL_COLLECTOR_MEMORY_LIMIT:-2G}
        reservations:
          cpus: ${OTEL_COLLECTOR_CPU_RESERVATION:-0.1}
          memory: ${OTEL_COLLECTOR_MEMORY_RESERVATION:-512M}
    healthcheck:
      test:
        - CMD
        - wget
        - --no-verbose
        - --tries=1
        - --spider
        - 'http://localhost:13133/'

      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 30s