老规矩，废话不多说，直接上步骤加图示。

1.拉取redis镜像，直接最新版本

docker pull redis:latest

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2.创建全部需要的文件夹和文件，我这里目录如图:

各目录作用介绍:

masterslave -存放redis主从docker-compose.yml文件

redisconf -存放redis哨兵主配置文件

sentinel  -存放redis的docker-compose.yml文件和哨兵多个配置文件

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3.reids主从docker-compose.yml

version: '3.7'
services:
  master:
    image: redis
    container_name: redis-master
    restart: always
    command: redis-server --requirepass 123456  --appendonly yes
    ports:
      - 6379:6379
    #数据卷目录挂载,都是当前目录，跟yml文件同级
    volumes:
      - ./data1:/data
  slave1:
    image: redis
    container_name: redis-slave-1
    restart: always
    command: redis-server --slaveof redis-master 6379  --requirepass 123456 --masterauth 123456  --appendonly yes
    ports:
      - 6380:6379
    volumes:
      - ./data2:/data
  slave2:
    image: redis
    container_name: redis-slave-2
    restart: always
    command: redis-server --slaveof redis-master 6379  --requirepass 123456 --masterauth 123456  --appendonly yes
    ports:
      - 6381:6379
    volumes:
      - ./data3:/data

4.进入redis主从目录，先启动redis主从

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5.创建redis哨兵主配置文件和多个配置文件

主配置文件:

# 自定义集群名,192.168.001.220 为 redis-master 的 ip，6379 为 redis-master 的端口，2 为最小投票数（因为有 3 台 Sentinel 所以可以设置成 #2）,kingmaster是可以自定义集群的名字
port 26379
dir /tmp
sentinel monitor kingmaster 192.168.001.220 6379 2
sentinel down-after-milliseconds kingmaster 30000
sentinel parallel-syncs kingmaster 1
sentinel auth-pass kingmaster redispwd
sentinel failover-timeout kingmaster 180000
sentinel deny-scripts-reconfig yes

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将此文件复制到指定位置3份并重命名

 cp sentinel.conf /home/sentinelredis/sentinel/sentinel1.conf
 cp sentinel.conf /home/sentinelredis/sentinel/sentinel2.conf
 cp sentinel.conf /home/sentinelredis/sentinel/sentinel3.conf

6.创建哨兵docker-compose文件

version: '3.7'
services:
  sentinel1:
    image: redis
    container_name: redis-sentinel-1
    restart: always
    ports:
      - 26379:26379
    command: redis-sentinel /home/sentinelredis/redisconf/sentinel.conf
    volumes:
      - ./sentinel1.conf:/home/sentinelredis/redisconf/sentinel.conf
  sentinel2:
    image: redis
    container_name: redis-sentinel-2
    restart: always
    ports:
    - 26380:26379
    command: redis-sentinel /home/sentinelredis/redisconf/sentinel.conf
    volumes:
      - ./sentinel2.conf:/home/sentinelredis/redisconf/sentinel.conf
  sentinel3:
    image: redis
    container_name: redis-sentinel-3
    ports:
      - 26381:26379
    command: redis-sentinel /home/sentinelredis/redisconf/sentinel.conf
    volumes:
      - ./sentinel3.conf:/home/sentinelredis/redisconf/sentinel.conf
networks:
  default:
    external:
      name: masterslave_default

这里要注意 networks:default:external:name: masterslave_default，这个是要查看自己redis的主节点信息，把Networks复制过来,命令:docker inspect d6a81ae3106e

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7.进入对应目录，启动哨兵:

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8.查看启动容器:

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最终目录图示:

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