# docker-compose.yml — nginx-logtail container stack
#
# One multi-arch image ships all four binaries (built by the companion
# Dockerfile). Each service below picks which binary it runs via
# `command:`. Services are opt-in via Docker Compose "profiles":
#
#   cp .env.example .env
#   $EDITOR .env                  # set COMPOSE_PROFILES and tunables
#   docker compose up -d
#
# Valid profile names: collector, aggregator, frontend.
#
# Typical deployments:
#
#   COMPOSE_PROFILES=aggregator,frontend      # central host (default)
#   COMPOSE_PROFILES=collector                # nginx host running only the collector in Docker
#   COMPOSE_PROFILES=collector,aggregator,frontend  # single-host all-in-one
#
# See .env.example for every tunable.

services:
  collector:
    profiles: [collector]
    build:
      context: .
      dockerfile: Dockerfile
    image: git.ipng.ch/ipng/nginx-logtail:latest
    container_name: nginx-logtail-collector
    restart: unless-stopped
    command: ["/usr/local/bin/collector"]
    env_file: .env

    # Host networking is the simplest way to accept UDP datagrams from a
    # host nginx on 127.0.0.1:9514 — bridge networking with port mapping
    # does not round-trip packets that never leave loopback. Mac/Windows
    # Docker Desktop users must switch to a bridge + explicit
    # COLLECTOR_LOGTAIL_BIND.
    network_mode: host

    # Mount nginx log directory so the file tailer can read it. Harmless
    # when COLLECTOR_LOGS is empty (the collector simply runs UDP-only).
    volumes:
      - /var/log/nginx:/var/log/nginx:ro

  aggregator:
    profiles: [aggregator]
    build:
      context: .
      dockerfile: Dockerfile
    image: git.ipng.ch/ipng/nginx-logtail:latest
    container_name: nginx-logtail-aggregator
    restart: unless-stopped
    command: ["/usr/local/bin/aggregator"]
    env_file: .env
    ports:
      - "9091:9091"                 # gRPC

  frontend:
    profiles: [frontend]
    build:
      context: .
      dockerfile: Dockerfile
    image: git.ipng.ch/ipng/nginx-logtail:latest
    container_name: nginx-logtail-frontend
    restart: unless-stopped
    command: ["/usr/local/bin/frontend"]
    env_file: .env
    ports:
      - "8080:8080"                 # HTTP dashboard