docker-compose.yaml

# Copilot Chat OTel monitoring stack
#
# Starts an OpenTelemetry Collector that accepts OTLP on :4318 (HTTP) and :4317 (gRPC),
# then forwards traces/metrics/logs to Azure Application Insights and a local Jaeger instance.
#
# Usage:
#   # Set your App Insights connection string:
#   export APPLICATIONINSIGHTS_CONNECTION_STRING="InstrumentationKey=...;IngestionEndpoint=..."
#
#   # Start the stack:
#   docker compose up -d
#
#   # View traces in Jaeger:
#   open http://localhost:16687
#
#   # Then launch VS Code with:
#   COPILOT_OTEL_ENABLED=true OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4328 code .

services:
  otel-collector:
    image: otel/opentelemetry-collector-contrib:latest
    command: ["--config=/etc/otel-collector-config.yaml"]
    volumes:
      - ./otel-collector-config.yaml:/etc/otel-collector-config.yaml:ro
    ports:
      - "4327:4317"   # OTLP gRPC (host:4327 → container:4317)
      - "4328:4318"   # OTLP HTTP (host:4328 → container:4318)
    environment:
      - APPLICATIONINSIGHTS_CONNECTION_STRING=${APPLICATIONINSIGHTS_CONNECTION_STRING:-}
    restart: unless-stopped

  jaeger:
    image: jaegertracing/jaeger:latest
    ports:
      - "16687:16686" # Jaeger UI (host:16687 to avoid conflict)
    restart: unless-stopped