version: '3.8'
x-postgres-common:
  &postgres-common
  image: postgres:16.3-alpine3.20
  user: postgres
  restart: always
  healthcheck:
    test: 'pg_isready -U mt_qa_postgres --dbname=mt_qa_billing'
    interval: 10s
    timeout: 5s
    retries: 5

services:
  postgres_primary:
    <<: *postgres-common
    container_name: postgres_primary
    ports:
      - 172.20.64.140:5432:5432
    environment:
      POSTGRES_USER: "mt_qa_postgres"
      POSTGRES_DB: "mt_qa_billing"
      POSTGRES_PASSWORD: "xM9A4!exJbQNhqJ"
      POSTGRES_HOST_AUTH_METHOD: "scram-sha-256\nhost replication all 0.0.0.0/0 md5"
      POSTGRES_INITDB_ARGS: "--auth-host=scram-sha-256"
    command: |
      postgres 
      -c wal_level=replica 
      -c hot_standby=on 
      -c max_wal_senders=10 
      -c max_replication_slots=10 
      -c hot_standby_feedback=on
    volumes:
      - ./scripts/00_init.sql:/docker-entrypoint-initdb.d/00_init.sql
      - pgprimary_data:/var/lib/postgresql/data
      # - ./config/postgresql.conf:/var/lib/postgresql/data/postgresql.conf
    networks:
      - portal_qa

  postgres_replica:
    <<: *postgres-common
    container_name: postgres_replica
    ports:
      - 172.20.64.140:5433:5432
    environment:
      PGUSER: "replicator"
      PGPASSWORD: "pP5UUJM0mj5b7rZMU5C6"    
    volumes:
      - pgreplica_data:/var/lib/postgresql/data 
    command: |
      bash -c "
      until pg_basebackup --pgdata=/var/lib/postgresql/data -R --slot=replication_slot --host=postgres_primary --port=5432
      do
      echo 'Waiting for primary to connect...'
      sleep 1s
      done
      echo 'Backup done, starting replica...'
      chmod 0700 /var/lib/postgresql/data
      postgres
      "
    depends_on:
      - postgres_primary
    networks:
      - portal_qa

volumes:
  pgprimary_data:
    driver: local
    driver_opts:
      o: bind
      type: none
      device: /data/container_volumes/pgprimary_data
  pgreplica_data:
    driver: local
    driver_opts:
      o: bind
      type: none
      device: /data/container_volumes/pgreplica_data
networks:
  portal_qa:
    external: true