docker-compose.yml

version: "3"

services:

  redis:
    image: redis:3.2-alpine
    ports:
      - "6379"
    networks:
      - voteapp
    deploy:
      placement:
        constraints: [node.role == manager]

  app:
    image: ondrejsika/testapp 
    ports:
      - 80:80
    networks:
      - voteapp
    depends_on:
      - redis
    deploy:
      mode: replicated
      replicas: 4
      placement:
        constraints: [node.role == worker]

networks:
    voteapp: