Redis（八）：哨兵（Sentinel）部署

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

3、部署步骤

3.1、安装Docker

Docker 安装参见：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/

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