docker搭建redis主从哨兵集群的实现步骤

Ianthe ·
更新时间:2024-09-20
· 1471 次阅读

目录

1:获取redis镜像

2:创建redis主从+哨兵docker-compose文件

3:redis配置和哨兵配置说明

4:启动docker-compose

5:查看启动情况

6:进入主节点查看集群情况

本文以docker-compose 搭建高可用Redis 主从、哨兵集群为例子

关于redis主从,哨兵集群原理参见:Redis 单机安装/ 哨兵模式集群安装

1:获取redis镜像 docker pull redis:6.2.7 2:创建redis主从+哨兵docker-compose文件 cd /opt/docker/redis vi docker-compose.yml

docker-compose.yml的内容如下 

version: '3' services: master: image: redis:6.2.7 ## 镜像 container_name: redis-master command: redis-server /etc/redis/redis.conf --requirepass 123456 --masterauth 123456 volumes: - /opt/docker/redis/data/redis_data1:/data - /opt/docker/redis/conf/redis1.conf:/etc/redis/redis.conf network_mode: "host" slave1: image: redis:6.2.7 ## 镜像 container_name: redis-slave-1 volumes: - /opt/docker/redis/data/redis_data2:/data - /opt/docker/redis/conf/redis2.conf:/etc/redis/redis.conf command: redis-server /etc/redis/redis.conf --slaveof redis-master 6379 --requirepass 123456 --masterauth 123456 depends_on: - master network_mode: "host" slave2: image: redis:6.2.7 ## 镜像 container_name: redis-slave-2 volumes: - /opt/docker/redis/data/redis_data3:/data - /opt/docker/redis/conf/redis3.conf:/etc/redis/redis.conf command: redis-server /etc/redis/redis.conf --slaveof redis-master 6379 --requirepass 123456 --masterauth 123456 depends_on: - master network_mode: "host" sentinel1: image: redis:6.2.7 ## 镜像 container_name: redis-sentinel-1 command: redis-sentinel /usr/local/etc/redis/sentinel.conf volumes: - /opt/docker/redis/conf/sentinel1.conf:/usr/local/etc/redis/sentinel.conf network_mode: "host" depends_on: - master - slave1 - slave2 sentinel2: image: redis:6.2.7 ## 镜像 container_name: redis-sentinel-2 command: redis-sentinel /usr/local/etc/redis/sentinel.conf volumes: - /opt/docker/redis/conf/sentinel2.conf:/usr/local/etc/redis/sentinel.conf network_mode: "host" depends_on: - master - slave1 - slave2 sentinel3: image: redis:6.2.7 ## 镜像 container_name: redis-sentinel-3 command: redis-sentinel /usr/local/etc/redis/sentinel.conf volumes: - /opt/docker/redis/conf/sentinel3.conf:/usr/local/etc/redis/sentinel.conf network_mode: "host" depends_on: - master - slave1 - slave2 3:redis配置和哨兵配置说明

 查看配置文件的目录树

cd /opt/docker/redis tree ./

结构如下

redis1.conf,redis2.conf,redis3.conf配置如下

#redis1.conf bind 0.0.0.0 port 6379 protected-mode no slave-read-only no #redis2.conf bind 0.0.0.0 port 6380 protected-mode no slave-read-only no #redis3.conf bind 0.0.0.0 port 6381 protected-mode no slave-read-only no

 sentinel1.conf,sentinel1.conf,sentinel1.conf配置:

#sentinel1.conf port 26379 dir /tmp sentinel monitor mymaster 192.168.18.131 6379 2 sentinel auth-pass mymaster 123456 sentinel down-after-milliseconds mymaster 30000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 10000 sentinel deny-scripts-reconfig yes #sentinel2.conf port 26380 dir /tmp sentinel monitor mymaster 192.168.18.131 6379 2 sentinel auth-pass mymaster 123456 sentinel down-after-milliseconds mymaster 30000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 10000 sentinel deny-scripts-reconfig yes #sentinel3.conf port 26381 dir /tmp sentinel monitor mymaster 192.168.18.131 6379 2 sentinel auth-pass mymaster 123456 sentinel down-after-milliseconds mymaster 30000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 10000 sentinel deny-scripts-reconfig yes

说明:

【sentinel monitor mymaster 192.168.18.131 6379 2】192.168.18.131为服务器的IP地址,6379为redis master的端口号
【sentinel auth-pass mymaster 123456 】设置主节点的密码  
【sentinel down-after-milliseconds mymaster 30000】表示在一段时间范围内sentinel向master发送的心跳PING没有回复则认为master不可用了。 
【sentinel parallel-syncs mymaster 1】的parallel-syncs表示设置在故障转移之后,同时可以重新配置使用新master的slave的数量。数字越低,更多的时间将会用故障转移完成,但是如果slaves配置为服务旧数据,你可能不希望所有的slave同时重新同步master。因为主从复制对于slave是非阻塞的,当停止从master加载批量数据时有一个片刻延迟。通过设置选项为1,确信每次只有一个slave是不可到达的。
【sentinel failover-timeout mymaster 10000  】表示10秒内mymaster还没活过来,则认为master宕机了。 

redis_data1, redis_data2,redis_data3为空文件夹,用于存放redis数据文件

4:启动docker-compose docker-compose up #或者,后台启动 docker-compose up -d 5:查看启动情况

6:进入主节点查看集群情况 docker exec -it 主节点容器id或者容器名称 bash redis-cli -p 6379 info replication

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