docker-compose.yaml

name: distr-dev

services:
  postgres:
    image: 'postgres:18.6-alpine3.23'
    environment:
      POSTGRES_USER: local
      POSTGRES_PASSWORD: local
      POSTGRES_DB: distr
    volumes:
      - 'postgres:/var/lib/postgresql/'
    ports:
      - '5432:5432'
  mailpit:
    image: 'axllent/mailpit:v1.31.1'
    ports:
      - '1025:1025'
      - '8025:8025'
  storage:
    image: 'rustfs/rustfs:1.0.0'
    ports:
      - '127.0.0.1:9000:9000'
      - '127.0.0.1:9001:9001'
    volumes:
      - 'rustfs:/data/'
    environment:
      RUSTFS_ACCESS_KEY: local
      RUSTFS_SECRET_KEY: local
    healthcheck:
      test: ['CMD', 'sh', '-c', 'curl -f http://127.0.0.1:9000/health']
      start_interval: 1s
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 40s

  # Loki stores deployment and deployment target log records. It runs in monolithic
  # (single-binary) mode and persists chunks + TSDB index in the rustfs "loki" bucket.
  # The bucket is created by a pre_start init container (requires Docker Compose >= 5.3.0).
  loki:
    image: 'grafana/loki:3.7.7'
    command: ['-config.file=/etc/loki/distr-config.yaml']
    configs:
      - source: loki-config
        target: /etc/loki/distr-config.yaml
    ports:
      - '127.0.0.1:3100:3100'
    volumes:
      - 'loki:/loki'
    depends_on:
      storage:
        condition: service_healthy
    pre_start:
      - image: 'rclone/rclone:1.74.4'
        environment:
          RCLONE_CONFIG_STORAGE_TYPE: s3
          RCLONE_CONFIG_STORAGE_PROVIDER: Other
          RCLONE_CONFIG_STORAGE_ENDPOINT: 'http://storage:9000'
          RCLONE_CONFIG_STORAGE_ACCESS_KEY_ID: local
          RCLONE_CONFIG_STORAGE_SECRET_ACCESS_KEY: local
        command: ['mkdir', 'storage:loki']

configs:
  loki-config:
    content: |
      auth_enabled: true

      server:
        http_listen_port: 3100
        # A single query result page (max_entries_limit_per_query entries) can exceed
        # the 4 MB gRPC default, which makes the internal querier->frontend handoff
        # fail and the query hang until it times out.
        grpc_server_max_recv_msg_size: 67108864
        grpc_server_max_send_msg_size: 67108864

      common:
        path_prefix: /loki
        replication_factor: 1
        ring:
          kvstore:
            store: inmemory

      schema_config:
        configs:
          - from: "2024-01-01"
            store: tsdb
            object_store: s3
            schema: v13
            index:
              prefix: index_
              period: 24h

      storage_config:
        aws:
          endpoint: http://storage:9000
          region: local
          access_key_id: local
          secret_access_key: local
          bucketnames: loki
          s3forcepathstyle: true

      compactor:
        retention_enabled: true
        delete_request_store: s3
        working_directory: /loki/compactor

      limits_config:
        # 30 days (business log query window) plus the 24h timezone slack and 1h margin.
        retention_period: 745h
        # Business queries may span the full window incl. the timezone slack, which
        # exceeds Loki's default max_query_length of 30d1h.
        max_query_length: 745h
        increment_duplicate_timestamp: true
        allow_structured_metadata: true
        max_global_streams_per_user: 25000
        # Truncate oversized log lines instead of rejecting the whole push.
        max_line_size_truncate: true
        # Accept backfilled logs up to the retention period so an agent that was
        # offline can still push its backlog.
        reject_old_samples_max_age: 745h
        # Raised from the 4/6 MB defaults so the log generator dev tool
        # (cmd/distr/generate/logs) can bulk-ingest without excessive throttling.
        ingestion_rate_mb: 64
        ingestion_burst_size_mb: 128

volumes:
  postgres:
  rustfs:
  loki: