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docker搭建redis主从哨兵集群的实现步骤

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-compose5: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.ymldocker-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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原创文章,作者:starterknow,如若转载,请注明出处:https://www.starterknow.com/108083.html

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