基于docker的redis集群的搭建

朴灿烈づ我的快乐病毒、 2022-11-15 11:59 244阅读 0赞

本篇基于docker的redis集群cluster搭建。以三主三从进行测试，redis选用5.0之前的版本（redis5.0及之后的版本与redis5.0之前的版本搭建稍有不同，redis5.0之前的版本搭建略显复杂，所有以5.0之前的版本进行测试）。5.0之后的可以参考另外一篇博客。  
`1、准备镜像`  
![redis镜像][redis]

说明：此处我用的仓库自建镜像，用官方镜像亦可，具体可参考https://blog.csdn.net/weixin_44320761/article/details/115298677?spm=1001.2014.3001.5501

`2、启动容器`

dvr start redis

[root@iZuf612i9bshiuw3zzlfe9Z redis]# docker ps
    CONTAINER ID        IMAGE               COMMAND               CREATED              STATUS              PORTS                    NAMES
    a30eb6b31dd7        redis:base          "/usr/sbin/sshd -D"   7 seconds ago        Up 5 seconds        0.0.0.0:6374->6379/tcp   redis_redis6374_1
    ca3d87fdfece        redis:base          "/usr/sbin/sshd -D"   43 seconds ago       Up 42 seconds       0.0.0.0:6375->6379/tcp   redis_redis6375_1
    adf814337f42        redis:base          "/usr/sbin/sshd -D"   About a minute ago   Up About a minute   0.0.0.0:6376->6379/tcp   redis_redis6376_1
    1f15f8336ff6        redis:base          "/usr/sbin/sshd -D"   About a minute ago   Up About a minute   0.0.0.0:6377->6379/tcp   redis_redis6377_1
    565a1ce0511c        redis:base          "/usr/sbin/sshd -D"   2 minutes ago        Up 2 minutes        0.0.0.0:6378->6379/tcp   redis_redis6378_1
    19df06bb5f90        redis:base          "/usr/sbin/sshd -D"   4 minutes ago        Up 4 minutes        0.0.0.0:6379->6379/tcp   redis_redis6379_1

`3、进入安装redis`

docker exec -it redis_redis6379_1 bash
    apt update
    apt upgrade
    apt install redis -y

说明：其他容器亦同

`4、修改配置文件`

69 #bind 127.0.0.1 ::1 #注释掉此行
    88 protected-mode no                     #关闭保护模式
    136 daemonize yes                        #后台启动模式
    以下是集群的修改：
    814 cluster-enabled yes                  #开启 Redis Cluster
    822 cluster-config-file nodes-6379.conf  #集群配置文件，每个容器配置改唯一就行
    828 cluster-node-timeout 15000           #集群中的节点能够失联的最大时间，超过这个时间，该节点就会被认为故障
    672 appendonly yes                       #开启AOF模式

说明：其他容器的配置除了cluster-config-file nodes-6379.conf改为不同，其余配置均相同。

`5、启动redis服务`

root@redis6379:/# /etc/init.d/redis-server start
    Starting redis-server: redis-server.
    root@redis6379:/# ps -aux |grep redis
    redis     7376  0.0  0.1  48504  2572 ?        Ssl  11:51   0:00 /usr/bin/redis-server *:6379 [cluster]
    root      7381  0.0  0.0  11460   724 ?        S+   11:51   0:00 grep --color=auto redis

`6、拷贝redis-trib.rb`

docker cp redis-trib.rb redis_redis6379_1:/usr/bin

说明：从5.0之前的版本里拷贝，tar包解压后的src目录下，附redis-4.0.11版本：http://download.redis.io/releases/redis-4.0.11.tar.gz

`7、创建集群`

#安装ruby环境
    apt install -y ruby
    #安装redis
    gem install redis
    #创建集群
    redis-trib.rb create --replicas 1 172.18.62.27:6379 172.18.62.29:6379 172.18.62.30:6379 172.18.62.31:6379 172.18.62.32:6379 172.18.62.33:6379

![集群信息][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70]  
![集群成功][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70 1]  
`8、集群验证`

#登录
    redis-cli -c

说明：-c的目的是为解决“(error) MOVED 5798”报错
    root@redis6379:/# redis-cli 
    127.0.0.1:6379> set name haha
    (error) MOVED 5798 172.18.62.29:6379
    127.0.0.1:6379> exit
    root@redis6379:/# redis-cli -c
    127.0.0.1:6379> set name haha
    -> Redirected to slot [5798] located at 172.18.62.29:6379
    OK

《数据验证》验证如下：

![集群测试][2021040113340042.png]

《主从切换验证》验证如下：
    172.18.62.33为172.18.62.29的从，现在我们停掉29，测试33的切换

`切换之前：`  
![主从切换][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70 2]  
`切换之后：`  
![集群主从切换][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70 3]  
![集群主从切换][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70 4]  
到此，redis集群cluster搭建完成！redis集群非docker基于5.0以上版本密码认证搭建可参考：[redis5.0以上版本基于密码认证搭建][redis5.0]

[redis]: /images/20221022/7cb4dc912b3844f0a722ea356ce97750.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20210401132505824.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20210401132612378.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ==,size_16,color_FFFFFF,t_70
[2021040113340042.png]: https://img-blog.csdnimg.cn/2021040113340042.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20210401133901830.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20210401134416203.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20210401134649728.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDMyMDc2MQ==,size_16,color_FFFFFF,t_70
[redis5.0]: https://blog.csdn.net/weixin_44320761/article/details/115390427