docker-compose.yml

version: '3'

services:
  master:
    image: redis:4.0.10-alpine
    networks: 
      - sentinel_net

  slave_1:
    image: redis:4.0.10-alpine
    networks: 
      - sentinel_net
    command: redis-server --slaveof master 6379
    depends_on:
      - master

  slave_2:
    image: redis:4.0.10-alpine
    networks: 
      - sentinel_net
    command: redis-server --slaveof master 6379
    depends_on:
      - master

  sentinel_1:
    image: s7anley/redis-sentinel-docker:4.0.10
    networks: 
      - sentinel_net
    ports:
      - 26379:26379
    environment:
      - MASTER_NAME=mymaster
      - QUORUM=2
      - MASTER=master
    depends_on:
      - master

  sentinel_2:
    image: s7anley/redis-sentinel-docker:4.0.10
    networks:
      - sentinel_net
    ports:
      - 26380:26379
    environment:
      - MASTER_NAME=mymaster      
      - QUORUM=2
      - MASTER=master
    depends_on:
      - master

  sentinel_3:
    image: s7anley/redis-sentinel-docker:4.0.10
    networks: 
      - sentinel_net
    ports:
      - 26381:26379
    environment:
      - MASTER_NAME=mymaster      
      - QUORUM=2
      - MASTER=master
    depends_on:
      - master

networks:
  sentinel_net: