docker-compose.compat.yml

# docker-compose.compat.yml
#
# Vendor compatibility overlay. Adds an edge OTel Collector that accepts
# Datadog, Jaeger, and Splunk HEC wire protocols and forwards OTLP to the
# base collector.
#
# Activation:
#   echo "INCLUDE_COMPOSE_COMPAT=docker-compose.compat.yml" >> .env
#   docker compose up -d
#
#   vendor apps ──▶ otel-collector-compat ──OTLP──▶ otel-collector (base)
#                   (this overlay)                  (unchanged)

services:
  otel-collector-compat:
    image: otel/opentelemetry-collector-contrib:${OTEL_COLLECTOR_VERSION}
    container_name: otel-collector-compat
    pull_policy: always
    command: ["--config=/etc/otelcol-config.yml"]
    volumes:
      - ./compat/collector/config.compat.yaml:/etc/otelcol-config.yml
    ports:
      # Datadog trace-agent (datadogreceiver)
      - "${COMPAT_DATADOG_APM_PORT:-8126}:8126"
      # DogStatsD (statsdreceiver, UDP)
      - "${COMPAT_DATADOG_STATSD_PORT:-8125}:8125/udp"
      # Jaeger native wire protocol. Modern Jaeger apps emit OTLP and should
      # send directly to the base collector on 4317/4318 instead of this hop.
      - "${COMPAT_JAEGER_GRPC_PORT:-14250}:14250"
      - "${COMPAT_JAEGER_THRIFT_HTTP_PORT:-14268}:14268"
      # Splunk HEC
      - "${COMPAT_SPLUNK_HEC_PORT:-8088}:8088"
    networks:
      - observability-stack-network
    restart: unless-stopped
    depends_on:
      - otel-collector
    deploy:
      resources:
        limits:
          memory: ${COMPAT_COLLECTOR_MEMORY_LIMIT:-256M}

  # Jaeger hotrod demo app. Emits OTLP directly to the base collector, so it
  # does not exercise the compat collector. Included as a built-in trace
  # generator for verifying the base pipeline end-to-end.
  #
  #   http://localhost:8080   hotrod UI
  #   http://localhost:5601   OpenSearch Dashboards → Trace Analytics
  hotrod:
    image: jaegertracing/example-hotrod:1.60
    container_name: hotrod
    environment:
      - OTEL_EXPORTER_OTLP_ENDPOINT=http://otel-collector:4318
    command: ["all"]
    networks:
      - observability-stack-network
    ports:
      - "8080:8080"
    depends_on:
      - otel-collector