运维(24)dockercompose部署redis一主二从三哨兵模式

一、前言

运维(23) docker-compose部署redis主从复制模式

本文将基于以下环境部署redis一主二从三哨兵模式

1. CentOS Linux release 7.6.1810 (Core)
2. Docker version 20.10.5, build 55c4c88
3. docker-compose version 1.28.6, build 5db8d86f

tips: 本文仅基于单台服务器环境部署

二、docker-compose部署redis一主二从三哨兵模式

可参考 https://gitee.com/zhengqingya/docker-compose

# 准备
git clone https://gitee.com/zhengqingya/docker-compose.git
cd docker-compose/Liunx# 当前目录下所有文件赋予权限(读、写、执行)
chmod -R 777 ./redis-master-slave-sentinel# 运行 -- 哨兵模式&＃xff08;sentinel监视redis主从服务&＃xff0c;当某个master服务下线时&＃xff0c;自动将该master下的某个从服务升级为master服务替代已下线的master服务继续处理请求 -- 即主节点切换&＃xff09;
docker-compose -f docker-compose-redis-master-slave-sentinel.yml -p redis up -d# 哨兵模式查看
# 连接
docker exec -it redis-sentinel-1 redis-cli -p 26379 -a 123456
# 查看redis主信息
sentinel master mymaster
# 查看redis从信息
sentinel slaves mymaster


下面贴出相关配置文件

docker-compose-redis-master-slave-sentinel.yml

version: &＃39;3&＃39;# 网桥redis -> 方便相互通讯
networks:redis:services:# &＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61; ↓↓↓↓↓↓ redis ↓↓↓↓↓↓ &＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;# 主redis-master:image: registry.cn-hangzhou.aliyuncs.com/zhengqing/redis:6.0.8 # 镜像&＃39;redis:6.0.8&＃39;container_name: redis-master # 容器名为&＃39;redis-master&＃39;restart: unless-stopped # 指定容器退出后的重启策略为始终重启&＃xff0c;但是不考虑在Docker守护进程启动时就已经停止了的容器command: redis-server /etc/redis/redis.conf --port 6380 --requirepass 123456 --masterauth 123456 --appendonly no # 启动redis服务并添加密码为&＃xff1a;123456, 当主redis下线重启后变成从redis时认证主redis密码&＃xff1a;123456, 默认不开启redis-aof方式持久化配置environment: # 设置环境变量,相当于docker run命令中的-eTZ: Asia/ShanghaiLANG: en_US.UTF-8volumes: # 数据卷挂载路径设置,将本机目录映射到容器目录
# - "./redis-master-slave-sentinel/redis/master/data:/data"- "./redis-master-slave-sentinel/redis/master/config/redis.conf:/etc/redis/redis.conf" # &＃96;redis.conf&＃96;文件内容&＃96;http://download.redis.io/redis-stable/redis.conf&＃96;ports: # 映射端口- "6380:6380"networks:- redis# 从1redis-slave-1:image: registry.cn-hangzhou.aliyuncs.com/zhengqing/redis:6.0.8 # 镜像&＃39;redis:6.0.8&＃39;container_name: redis-slave-1 # 容器名为&＃39;redis-slave-1&＃39;restart: unless-stopped # 指定容器退出后的重启策略为始终重启&＃xff0c;但是不考虑在Docker守护进程启动时就已经停止了的容器command: redis-server /etc/redis/redis.conf --port 6381 --requirepass 123456 --appendonly no --slaveof redis-master 6380 --masterauth 123456 # 启动redis服务并添加密码为&＃xff1a;123456,默认不开启redis-aof方式持久化配置,连接并认证master节点environment: # 设置环境变量,相当于docker run命令中的-eTZ: Asia/ShanghaiLANG: en_US.UTF-8volumes: # 数据卷挂载路径设置,将本机目录映射到容器目录
# - "./redis-master-slave-sentinel/redis/slave-1/data:/data"- "./redis-master-slave-sentinel/redis/slave-1/config/redis.conf:/etc/redis/redis.conf" # &＃96;redis.conf&＃96;文件内容&＃96;http://download.redis.io/redis-stable/redis.conf&＃96;ports: # 映射端口- "6381:6381"networks:- redisdepends_on:- redis-masterlinks:- redis-master# 从2redis-slave-2:image: registry.cn-hangzhou.aliyuncs.com/zhengqing/redis:6.0.8 # 镜像&＃39;redis:6.0.8&＃39;container_name: redis-slave-2 # 容器名为&＃39;redis-slave-2&＃39;restart: unless-stopped # 指定容器退出后的重启策略为始终重启&＃xff0c;但是不考虑在Docker守护进程启动时就已经停止了的容器command: redis-server /etc/redis/redis.conf --port 6382 --requirepass 123456 --appendonly no --slaveof redis-master 6380 --masterauth 123456 # 启动redis服务并添加密码为&＃xff1a;123456,默认不开启redis-aof方式持久化配置,连接并认证master节点environment: # 设置环境变量,相当于docker run命令中的-eTZ: Asia/ShanghaiLANG: en_US.UTF-8volumes: # 数据卷挂载路径设置,将本机目录映射到容器目录
# - "./redis-master-slave-sentinel/redis/slave-2/data:/data"- "./redis-master-slave-sentinel/redis/slave-2/config/redis.conf:/etc/redis/redis.conf" # &＃96;redis.conf&＃96;文件内容&＃96;http://download.redis.io/redis-stable/redis.conf&＃96;ports: # 映射端口- "6382:6382"networks:- redisdepends_on:- redis-masterlinks:- redis-master# &＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61; ↓↓↓↓↓↓ sentinel ↓↓↓↓↓↓ &＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;redis-sentinel-1:image: registry.cn-hangzhou.aliyuncs.com/zhengqing/redis:6.0.8 # 镜像&＃39;redis:6.0.8&＃39;container_name: redis-sentinel-1 # 容器名为&＃39;redis-sentinel-1&＃39;restart: unless-stopped # 指定容器退出后的重启策略为始终重启&＃xff0c;但是不考虑在Docker守护进程启动时就已经停止了的容器command: redis-sentinel /etc/redis/sentinel.confenvironment: # 设置环境变量,相当于docker run命令中的-eTZ: Asia/ShanghaiLANG: en_US.UTF-8ports:- "26379:26379"volumes:- "./redis-master-slave-sentinel/sentinel/redis-sentinel-1.conf:/etc/redis/sentinel.conf" # &＃96;sentinel.conf&＃96;文件内容&＃96;http://download.redis.io/redis-stable/sentinel.conf&＃96;networks:- redisdepends_on:- redis-master- redis-slave-1- redis-slave-2links:- redis-master- redis-slave-1- redis-slave-2redis-sentinel-2:image: registry.cn-hangzhou.aliyuncs.com/zhengqing/redis:6.0.8 # 镜像&＃39;redis:6.0.8&＃39;container_name: redis-sentinel-2 # 容器名为&＃39;redis-sentinel-2&＃39;restart: unless-stopped # 指定容器退出后的重启策略为始终重启&＃xff0c;但是不考虑在Docker守护进程启动时就已经停止了的容器command: redis-sentinel /etc/redis/sentinel.confenvironment: # 设置环境变量,相当于docker run命令中的-eTZ: Asia/ShanghaiLANG: en_US.UTF-8ports:- "26380:26380"volumes:- "./redis-master-slave-sentinel/sentinel/redis-sentinel-2.conf:/etc/redis/sentinel.conf" # &＃96;sentinel.conf&＃96;文件内容&＃96;http://download.redis.io/redis-stable/sentinel.conf&＃96;networks:- redisdepends_on:- redis-master- redis-slave-1
# - redis-slave-2- redis-sentinel-1links:- redis-master- redis-slave-1- redis-slave-2redis-sentinel-3:image: registry.cn-hangzhou.aliyuncs.com/zhengqing/redis:6.0.8 # 镜像&＃39;redis:6.0.8&＃39;container_name: redis-sentinel-3 # 容器名为&＃39;redis-sentinel-3&＃39;restart: unless-stopped # 指定容器退出后的重启策略为始终重启&＃xff0c;但是不考虑在Docker守护进程启动时就已经停止了的容器command: redis-sentinel /etc/redis/sentinel.confenvironment: # 设置环境变量,相当于docker run命令中的-eTZ: Asia/ShanghaiLANG: en_US.UTF-8ports:- "26381:26381"volumes:- "./redis-master-slave-sentinel/sentinel/redis-sentinel-3.conf:/etc/redis/sentinel.conf" # &＃96;sentinel.conf&＃96;文件内容&＃96;http://download.redis.io/redis-stable/sentinel.conf&＃96;networks:- redisdepends_on:- redis-master- redis-slave-1- redis-slave-2- redis-sentinel-1- redis-sentinel-2links:- redis-master- redis-slave-1- redis-slave-2


redis.conf

参考 http://download.redis.io/redis-stable/redis.conf

redis-sentinel.conf

参考 http://download.redis.io/redis-stable/sentinel.conf

port 26379
dir /tmp
sentinel monitor mymaster redis-master 6380 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel auth-pass mymaster 123456
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes


运行后如下

redis-sentinel.conf配置文件会自动加载到redis从节点信息

三、测试

1. 主写从读
2. 主节点下线后&＃xff0c;sentinel自动将其它从节点升级为主节点且具备写能力
3. 将之前下线的主节点重启上线时变成从节点

这个就自己测试着玩吧^_^

sentinel切换redis主从节点日志如下

四、其它

小编在部署的时候遇到sentinel无法自动切换主从的问题

解决情况1&＃xff1a;端口映射问题

在同一机器上部署时端口最好一一对应

解决情况2&＃xff1a;redis由于安全问题禁用命令CONFIG - 防止客户端修改Redis配置

在redis.conf中关闭其配置

解决情况3&＃xff1a;redis主节点下线后再重启变成从节点时&＃xff0c;需配置认证主节点

今日分享语句&＃xff1a;
不要轻易用过去来衡量生活的幸与不幸&＃xff01;每个人的生命都是可以绽放美丽&＃xff5e; 只要你懂得珍惜。