Redis（八）：哨兵（Sentinel）部署

左手的ㄟ右手 2022-01-27 06:53 276阅读 0赞

本文基于 Docker Engine 和 Docker Compose 环境，单机部署 Redis Sentinel

## 1、部署环境 ##

Docker version 18.09.6, build 481bc77156
    Linux 5.1.3-1.el7.elrepo.x86_64
    docker-compose version 1.24.0, build 0aa59064

## 2、部署架构 ##

本文部署架构为一主多从三哨兵，因服务器条件有限，该架构在一台服务器中进行部署，仅供参考  
![image][]

## 3、部署步骤 ##

### 3.1、安装Docker ###

Docker 安装参见：[https://docs.docker.com/install/linux/docker-ce/centos/][https_docs.docker.com_install_linux_docker-ce_centos]

### 3.2、安装Docker Compose ###

1、执行以下命令安装当前稳定版本的Docker Compose

sudo curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

2、赋予可执行权限

sudo chmod +x /usr/local/bin/docker-compose

如遇其他问题可前往查看官方文档：[https://docs.docker.com/compose/install/][https_docs.docker.com_compose_install]

### 3.3、创建Docker Compose Redis 模板 ###

docker-redis-compose.txt

version: '2'
    services:
      master:
        image: redis       
        container_name: redis-master
        command: redis-server --requirepass 123456
        ports:
        - "6379:6379"
        networks:
        - sentinel-master
      slave1:
        image: redis               
        container_name: redis-slave-1
        ports:
        - "6380:6379"           
        command: redis-server --slaveof redis-master 6379 --requirepass 123456 --masterauth 123456 
        depends_on:
        - master
        networks:
        - sentinel-master
      slave2:
        image: redis
        container_name: redis-slave-2
        ports:
        - "6381:6379"
        command: redis-server --slaveof redis-master 6379 --requirepass 123456 --masterauth 123456
        depends_on:
        - master
        networks:
        - sentinel-master
    networks:
      sentinel-master:

### 3.4、创建Docker Compose Redis Sentinel 模板 ###

docker-redis-sentinel-compose.txt

version: '2'
    services:
      sentinel_01:
        image: redis  
        container_name: redis-sentinel-01
        command: redis-sentinel /usr/local/etc/redis/sentinel.conf
        volumes:
        - "/data/redis/conf:/usr/local/etc/redis"
      sentinel_02:
        image: redis
        container_name: redis-sentinel-02
        ports:
        - "26380:26379"           
        command: redis-sentinel /usr/local/etc/redis/sentinel.conf
        volumes:
        - "/data/redis/conf:/usr/local/etc/redis"
      sentinel_03:
        image: redis
        container_name: redis-sentinel-03
        ports:
        - "26381:26379"           
        command: redis-sentinel /usr/local/etc/redis/sentinel.conf
        volumes:
        - /data/redis/conf:/usr/local/etc/redis
    networks:
      default:
        external:
          name: redis_sentinel_master

哨兵的配置文件如下：

port 26379
    dir "/tmp"
    sentinel monitor redis-master 【服务器IP】 6379 2
    sentinel failover-timeout redis-master 10000
    sentinel auth-pass redis-master 123456

port：sentinel节点的端口
    dir：监控日志
    sentinel monitor redis-master：当前监控主节点
        2：代表判断主节点失败至少需要2个Sentinel节点同意
        redis-master：是主节点的别名
    sentinel failover-timeout：故障转移超时时间为10000毫秒

## 4、启动集群 ##

### 4.1、启动Redis主从复制集群 ###

docker-compose -f docker-redis-compose.txt up -d

### 4.2、启动Redis Sentinel 集群 ###

docker-compose -f docker-redis-sentinel-compose.txt up -d

## 5、查看集群运行情况 ##

[root@xry compose]# docker ps
    CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                NAMES
    30da5d04a142        redis               "docker-entrypoint.s…"   5 seconds ago       Up 3 seconds        6379/tcp                             redis-sentinel-01
    5d8971c6585e        redis               "docker-entrypoint.s…"   5 seconds ago       Up 3 seconds        6379/tcp, 0.0.0.0:26381->26379/tcp   redis-sentinel-03
    475063baae05        redis               "docker-entrypoint.s…"   5 seconds ago       Up 3 seconds        6379/tcp, 0.0.0.0:26380->26379/tcp   redis-sentinel-02
    48f7e2d54787        redis               "docker-entrypoint.s…"   17 seconds ago      Up 16 seconds       0.0.0.0:6380->6379/tcp               redis-slave-1
    2c570706b6d8        redis               "docker-entrypoint.s…"   17 seconds ago      Up 16 seconds       0.0.0.0:6381->6379/tcp               redis-slave-2
    96732d1ae66c        redis               "docker-entrypoint.s…"   17 seconds ago      Up 16 seconds       0.0.0.0:6379->6379/tcp               redis-master

[image]: /images/20220127/5402c226e56346fba127a41e9919fa6e.png
[https_docs.docker.com_install_linux_docker-ce_centos]: https://docs.docker.com/install/linux/docker-ce/centos/
[https_docs.docker.com_compose_install]: https://docs.docker.com/compose/install/