Docker 搭建 Redis Sentinel（一主两从三哨兵）

本文记录使用 docker-compose 快速搭建一个 Redis Sentinel 测试环境。其中 Redis 集群为 1 个 master 节点，2 个 slave 节点，Sentinel 为 3 个节点。

主机环境

系统 centos 7.5，ip ，docker 20.10.12，docker-compose v2.2.2，redis latest。

1）在 /usr/local/etc/redis 目录下，新建 docker-compose.yml

version: '3'
services:
  master:
    image: redis
    container_name: redis-master
    command: redis-server --requirepass qwe!@#123  --masterauth qwe!@#123
    ports:
      - 6379:6379
  slave1:
    image: redis
    container_name: redis-slave-1
    ports:
      - 6380:6380
    command:  redis-server --slaveof redis-master 6379 --requirepass qwe!@#123 --masterauth qwe!@#123
  slave2:
    image: redis
    container_name: redis-slave-2
    ports:
      - 6381:6381
    command: redis-server --slaveof redis-master 6379 --requirepass qwe!@#123 --masterauth qwe!@#123

--requirepass：指定redis登陆的密码。

2）启动 redis 集群

docker-compose up -d

3）查看 redis-master 节点的 docker-ip 和 network name

docker inspect redis-master

 

 

 4）搭建 sentinel 集群

 　　4.1 在 /usr/local/etc/redis/sentinel 目录下，新建 docker-compose.yml

version: '3'
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:
    - 26380:26380
    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:
      - 26381:26381
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    volumes:
      - ./sentinel3.conf:/usr/local/etc/redis/sentinel.conf
networks:
  default:
    external:
      name: redis_default

 　　4.2 新建 sentinel1.conf

port 26379
dir /tmp
sentinel monitor mymaster 172.18.0.3 6379 2
sentinel auth-pass mymaster qwe!@#123
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes

　　复制到 sentinel2.conf， sentinel3.conf 中，端口分别修改为 26380 和 26381

port 26380
dir /tmp
sentinel monitor mymaster 172.18.0.3 6379 2
sentinel auth-pass mymaster qwe!@#123
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes

port 26381
dir /tmp
sentinel monitor mymaster 172.18.0.3 6379 2
sentinel auth-pass mymaster qwe!@#123
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes

　　4.3 在该目录启动 sentinel 集群

docker-compose up -d 

　　sentinel 启动之后，查看日志：

docker logs -f redis-sentinel-1

如下：