docker-compose.postgres-failover.yml

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name: shardline-postgres-failover

services:
  failover-primary:
    image: postgres:16-alpine
    container_name: shardline-failover-primary
    networks: [failover-net]
    ports: ["25432:5432"]
    environment:
      POSTGRES_USER: shardline
      POSTGRES_PASSWORD: shardline-dev-password
      POSTGRES_DB: shardline
    command:
      - postgres
      - -c
      - wal_level=replica
      - -c
      - max_wal_senders=10
      - -c
      - max_replication_slots=10
    tmpfs: [/var/lib/postgresql/data]
    volumes:
      - ./scripts/fixtures/postgres-failover/init-replication.sh:/docker-entrypoint-initdb.d/10-replication.sh:ro
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U shardline -d shardline"]
      interval: 1s
      timeout: 2s
      retries: 30
      start_period: 3s

  failover-standby:
    image: postgres:16-alpine
    container_name: shardline-failover-standby
    networks: [failover-net]
    ports: ["25433:5432"]
    environment:
      PGDATA: /var/lib/postgresql/data
      PGPASSWORD: replication-dev-password
    entrypoint: [/usr/local/bin/shardline-standby-entrypoint.sh]
    depends_on:
      failover-primary: { condition: service_healthy }
    tmpfs: [/var/lib/postgresql/data]
    volumes:
      - ./scripts/fixtures/postgres-failover/standby-entrypoint.sh:/usr/local/bin/shardline-standby-entrypoint.sh:ro
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U shardline -d shardline"]
      interval: 1s
      timeout: 2s
      retries: 60
      start_period: 5s

networks:
  failover-net:
    name: shardline-postgres-failover-net
    driver: bridge