首先伺服器安裝docker docker-compose

第一步：在usr/local/docker/redis 下建立docker-compose.yml；沒有目錄mkdir

內容：

version: '3.1'
services:
  master:
    image: redis
    container_name: redis-master
    ports:
      - 6379:6379

  slave1:
    image: redis
    container_name: redis-slave-1
    ports:
      - 6380:6379
    command: redis-server --slaveof redis-master 6379

  slave2:
    image: redis
    container_name: redis-slave-2
    ports:
      - 6381:6379
    command: redis-server --slaveof redis-master 6379
 

第二步：docker-compose up -d
　　沒有redis系統自動安裝
　　檢視是否允許 docker ps
第三步：在usr/local/docker/sentinel 下建立docker-compose.yml；沒有目錄mkdir
內容：

version: '3.1'
services:
  sentinel1:
    image: redis
    container_name: redis-sentinel-1
    ports:
      - 26379:26379
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    volumes:
      - ./sentinel1.conf:/usr/local/etc/redis/sentinel.conf

  sentinel2:
    image: redis
    container_name: redis-sentinel-2
    ports:
      - 26380:26379
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    volumes:
      - ./sentinel2.conf:/usr/local/etc/redis/sentinel.conf

  sentinel3:
    image: redis
    container_name: redis-sentinel-3
    ports:
      - 26381:26379
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    volumes:
      - ./sentinel3.conf:/usr/local/etc/redis/sentinel.conf
 

修改 Sentinel 配置檔案

需要三份 sentinel.conf 配置檔案，分別為sentinel1.conf，sentinel2.conf，sentinel3.conf，配置檔案內容相同

線建立sentinel.conf 後分別拷貝cp sentinel.conf sentinel1.conf

sentinel.conf內容如下

port 26379
dir /tmp
# 自定義叢集名，其中 127.0.0.1 為 redis-master 的 ip，6379 為 redis-master 的埠，2 為最小投票數（因為有 3 臺 Sentinel 所以可以設定成 2）
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes