PG in docker swarm standalone and with replica

pg-replica.yml

version: '3.5'

networks:
  webapp:
    driver: overlay
    name: webapp

services:
  primary:
    hostname: 'primary'
    image: crunchydata/crunchy-postgres:centos7-9.6.11-2.2.0
    environment:
    - PGHOST=/tmp
    - MAX_CONNECTIONS=10
    - MAX_WAL_SENDERS=5
    - PG_MODE=primary
    - PG_PRIMARY_USER=primaryuser
    - PG_PRIMARY_PASSWORD=primarypassword
    - PG_DATABASE=testdb
    - PG_USER=pguser
    - PG_PASSWORD=pgpassword
    - PG_ROOT_PASSWORD=longsecretpassword
    - PG_PRIMARY_PORT=5432
    volumes:
    - pg-primary-vol:/pgdata
    ports:
    - "5432"
    networks:
    - webapp
    deploy:
      restart_policy:
        condition: on-failure
        delay: 10s
        max_attempts: 4
        window: 300s  
    healthcheck:
      test: ["CMD-SHELL", "/usr/pgsql-9.6/bin/pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 2m

  replica:
    image: crunchydata/crunchy-postgres:centos7-9.6.11-2.2.0
    environment:
    - PGHOST=/tmp
    - MAX_CONNECTIONS=10
    - MAX_WAL_SENDERS=5
    - PG_MODE=replica
    - PG_PRIMARY_HOST=primary
    - PG_PRIMARY_PORT=5432
    - PG_PRIMARY_USER=primaryuser
    - PG_PRIMARY_PASSWORD=primarypassword
    - PG_DATABASE=testdb
    - PG_USER=testuser
    - PG_PASSWORD=password
    - PG_ROOT_PASSWORD=Pje5SXan7qHa9LFL3nmYCUBgwR6EHtF6K4qKnvfd
    volumes:
    - pg-replica-vol:/pgdata
    ports:
    - "5432"
    networks:
    - webapp
    deploy:
      restart_policy:
        condition: on-failure
        delay: 10s
        max_attempts: 4
        window: 300s     
    healthcheck:
      test: ["CMD-SHELL", "/usr/pgsql-9.6/bin/pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5  
      start_period: 30s      
    depends_on:
      - pg-primary

volumes:
  pg-primary-vol:
  pg-replica-vol:   

pg.yml

version: '3.5'

networks:
  webapp:
    driver: overlay
    name: webapp

services:
  primary:
    hostname: 'primary'
    image: crunchydata/crunchy-postgres:centos7-9.6.11-2.2.0
    environment:
    - PGHOST=/tmp
    - MAX_CONNECTIONS=10
    - MAX_WAL_SENDERS=5
    - PG_MODE=primary
    - PG_PRIMARY_USER=primaryuser
    - PG_PRIMARY_PASSWORD=primarypassword
    - PG_DATABASE=testdb
    - PG_USER=pguser
    - PG_PASSWORD=pgpassword
    - PG_ROOT_PASSWORD=longsecretpassword
    - PG_PRIMARY_PORT=5432
    volumes:
    - pg-primary-vol:/pgdata
    ports:
    - "5432"
    networks:
    - webapp
    deploy:
      restart_policy:
        condition: on-failure
        delay: 10s
        max_attempts: 4
        window: 300s     
    healthcheck:
      test: ["CMD-SHELL", "/usr/pgsql-9.6/bin/pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 2m

volumes:
  pg-primary-vol: