centos7 Redis单机多节点集群部署

太过爱你忘了你带给我的痛 2022-06-02 00:38 291阅读 0赞

centos7 redis的安装请参考一下链接  [ http://blog.csdn.net/duguxingfeng/article/details/78911640][http_blog.csdn.net_duguxingfeng_article_details_78911640]

**1.Reids安装包里有个集群工具，要复制到/usr/local/bin里去**

[root@localhost ~]# ll
    
    [root@localhost ~]# cd redis-3.2.9/src
    
    [root@localhost src]# ll

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[root@localhost src]# cp redis-trib.rb /usr/local/bin
    
    [root@localhost ~]# cd /usr/local/bin;ll

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**2.创建节点，修改配置文件**

我们现在要搞六个节点，三主三从，

端口规定分别是7001，7002，7003，7004，7005，7006

我们先在root目录下新建一个redis\_cluster目录，然后该目录下再创建6个目录，

分别是7001，7002，7003，7004，7005，7006，用来存在redis配置文件；

这里我们要使用redis集群，要先修改redis的配置文件redis.conf

具体步骤如下：

[root@localhost ~]# mkdir redis_cluster
    
    [root@localhost ~]# cd redis_cluster/
    
    [root@localhost redis_cluster]# mkdir 7001 7002 7003 7004 7005 7006

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先复制一份配置文件到7001目录下

[root@localhost redis_cluster]# cd
    
    [root@localhost ~]# cp redis-3.2.9/redis.conf redis_cluster/7001/
    
    [root@localhost ~]# vim redis_cluster/7001/redis.conf

修改此配置文件里面的一下几项数值

#bind 127.0.0.1  #注释掉，使其他机器也可访问
    
    protected-mode no #关闭保护模式
    
    
    
    port 7001  #六个节点配置文件分别是7001-7006
    
    daemonize yes        #redis后台运行
    
    pidfile /var/run/redis_7001.pid   #pidfile文件对应7001-7006
    
    cluster-enabled yes   #开启集群
    
    cluster-config-file nodes_7001.conf  #保存节点配置，自动创建，自动更新对应7001-7006
    
    cluster-node-timeout 5000    /#集群超时时间，节点超过这个时间没反应就断定是宕机

7001下的修改完后，我们把7001下的配置分别复制到7002-7006 ，只需修改port 、pidfile、cluster-config-file 即可

[root@localhost ~]# cp redis_cluster/7001/redis.conf redis_cluster/7002/
    
    [root@localhost ~]# cp redis_cluster/7001/redis.conf redis_cluster/7003/
    
    [root@localhost ~]# cp redis_cluster/7001/redis.conf redis_cluster/7004/
    
    [root@localhost ~]# cp redis_cluster/7001/redis.conf redis_cluster/7005/
    
    [root@localhost ~]# cp redis_cluster/7001/redis.conf redis_cluster/7006/

3.分别启动上述六个节点

[root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7001/redis.conf 
    
    [root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7002/redis.conf 
    
    [root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7003/redis.conf 
    
    [root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7004/redis.conf 
    
    [root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7005/redis.conf 
    
    [root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7006/redis.conf

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出现以上说明这六个节点已经启动成功，接下来需要创建集群

**4.创建集群**

这里需要用到第一步复制到**usr/local/bin**里面的**redis-trib.rb**工具

创建集群之前需要安装rubby，以及redis和rubby的连接

[root@localhost ~]# yum -y install ruby ruby-devel rubygems rpm-build
    
    [root@localhost ~]# gem install redis

会提示

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说明redis 需要ruby的版本在2.2.2以上。我们可以看到目前的版本为2.0.0

[root@localhost ~]# yum list ruby

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[root@localhost ~]# yum remove ruby

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提示是否删除依赖，这里选择y

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采用 rvm来更新ruby

首先需要安装RVM 具体步骤如下：

1.   \[root@localhost ~\]\# gpg2 --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3      会下载密钥，如果连接失败，多尝试几次。

2.   root@localhost ~\]\# curl -L get.rvm.io | bash -s stable

3.  \[root@localhost ~\]\# find / -name rvm -print

4.  \[root@localhost ~\]\# source /usr/local/rvm/scripts/rvm

5.  \[root@localhost ~\]\#  rvm list known

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6.\[root@localhost ~\]\# rvm install 2.3.3   安装ruby2.3.3此过程可能较慢，

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7.  \[root@localhost ~\]\# ruby -v                \#查看当前ruby版本，为2.3.3

8.   \[root@localhost ~\]\# gem install redis    \#重新安装redis即可

redis安装完成之后即可创建集群

\[root@localhost ~\]\# redis-trib.rb create --replicas 1  127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 127.0.0.1:7006

这一步可能会提示

>>> Creating cluster  
\[ERR\] Node 127.0.0.1:7001 is not empty. Either the node already knows other nodes (check with CLUSTER NODES) or contains some key in database 0.

类似的错误。

其解决方案如下：

1. \[root@localhost ~\]\#  ps -ef | grep redis  \#查看目前redis的进程 杀掉节点的进程

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2.到 用户目录下 删除下图文件。

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3.重新启动各个节点即可。

4.以上步骤可循环尝试

创建集群

[root@localhost ~]# redis-trib.rb create --replicas 1  127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 127.0.0.1:7006

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从运行结果看 主节点就是7001 7002 7003 从节点分别是7004 7005 7006

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以上说明集群已经配置成功！

**5.测试：**

\[root@localhost ~\]\# /usr/local/redis/bin/redis-cli -c -p 7002   \#登录节点7002

设置age

登录其他节点获取，能够成功获取到值

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6.集群宕机测试

这里我们干掉一个节点，比如7003

[root@localhost ~]#  ps -ef|grep redis
    root       9606      1  0 10:50 ?        00:00:06 /usr/local/redis/bin/redis-server *:7001 [cluster]
    root       9614      1  0 10:50 ?        00:00:06 /usr/local/redis/bin/redis-server *:7002 [cluster]
    root       9623      1  0 10:51 ?        00:00:06 /usr/local/redis/bin/redis-server *:7003 [cluster]
    root       9635      1  0 10:51 ?        00:00:06 /usr/local/redis/bin/redis-server *:7004 [cluster]
    root       9642      1  0 10:51 ?        00:00:06 /usr/local/redis/bin/redis-server *:7005 [cluster]
    root       9649      1  0 10:51 ?        00:00:06 /usr/local/redis/bin/redis-server *:7006 [cluster]
    root      10370  10209  0 11:31 pts/4    00:00:00 grep --color=auto redis
    [root@localhost ~]#  ps -ef|grep redis
    root       9606      1  0 10:50 ?        00:00:06 /usr/local/redis/bin/redis-server *:7001 [cluster]
    root       9614      1  0 10:50 ?        00:00:06 /usr/local/redis/bin/redis-server *:7002 [cluster]
    root       9635      1  0 10:51 ?        00:00:06 /usr/local/redis/bin/redis-server *:7004 [cluster]
    root       9642      1  0 10:51 ?        00:00:06 /usr/local/redis/bin/redis-server *:7005 [cluster]
    root       9649      1  0 10:51 ?        00:00:06 /usr/local/redis/bin/redis-server *:7006 [cluster]
    root      10381  10209  0 11:32 pts/4    00:00:00 grep --color=auto redis

查看目前集群的情况

[root@localhost ~]# redis-trib.rb check 127.0.0.1:7001
    >>> Performing Cluster Check (using node 127.0.0.1:7001)
    M: ce53acdd719273cf6af746da9760243cf70860b1 127.0.0.1:7001
       slots:0-5460 (5461 slots) master
       1 additional replica(s)
    M: d155427a31c295179642c22b6936fd5acb31e6a8 127.0.0.1:7006
       slots:10923-16383 (5461 slots) master
       0 additional replica(s)
    S: e39fb46a37e63f737b6802f13458b8a1978f7d05 127.0.0.1:7004
       slots: (0 slots) slave
       replicates ce53acdd719273cf6af746da9760243cf70860b1
    S: 3aeb4b14c31f1c3f7858236ed1e705d62b824b11 127.0.0.1:7005
       slots: (0 slots) slave
       replicates dacc614b13d4f927cf80a557a74ddc7d737ccf23
    M: dacc614b13d4f927cf80a557a74ddc7d737ccf23 127.0.0.1:7002
       slots:5461-10922 (5462 slots) master
       1 additional replica(s)
    [OK] All nodes agree about slots configuration.
    >>> Check for open slots...
    >>> Check slots coverage...
    [OK] All 16384 slots covered.

我们看到 7006本来是从节点，但是7003这个主节点挂了，7006就变成了主节点

同时显示\[OK\] All 16384 slots covered. 表明，集群还可用。

现在我们干掉7006

[root@localhost ~]#  ps -ef|grep redis
    root       9606      1  0 10:50 ?        00:00:08 /usr/local/redis/bin/redis-server *:7001 [cluster]
    root       9614      1  0 10:50 ?        00:00:08 /usr/local/redis/bin/redis-server *:7002 [cluster]
    root       9635      1  0 10:51 ?        00:00:08 /usr/local/redis/bin/redis-server *:7004 [cluster]
    root       9642      1  0 10:51 ?        00:00:08 /usr/local/redis/bin/redis-server *:7005 [cluster]
    root       9649      1  0 10:51 ?        00:00:08 /usr/local/redis/bin/redis-server *:7006 [cluster]
    root      10436  10209  0 11:37 pts/4    00:00:00 grep --color=auto redis
    [root@localhost ~]# kill -9 9649
    [root@localhost ~]# redis-trib.rb check 127.0.0.1:7001
    [ERR] Sorry, can't connect to node 127.0.0.1:7006
    >>> Performing Cluster Check (using node 127.0.0.1:7001)
    M: ce53acdd719273cf6af746da9760243cf70860b1 127.0.0.1:7001
       slots:0-5460 (5461 slots) master
       1 additional replica(s)
    S: e39fb46a37e63f737b6802f13458b8a1978f7d05 127.0.0.1:7004
       slots: (0 slots) slave
       replicates ce53acdd719273cf6af746da9760243cf70860b1
    S: 3aeb4b14c31f1c3f7858236ed1e705d62b824b11 127.0.0.1:7005
       slots: (0 slots) slave
       replicates dacc614b13d4f927cf80a557a74ddc7d737ccf23
    M: dacc614b13d4f927cf80a557a74ddc7d737ccf23 127.0.0.1:7002
       slots:5461-10922 (5462 slots) master
       1 additional replica(s)
    [OK] All nodes agree about slots configuration.
    >>> Check for open slots...
    >>> Check slots coverage...
    [ERR] Not all 16384 slots are covered by nodes.

最后发现 Not all 16384 slots are covered by nodes. 没有完全覆盖，集群不能正常使用

如需重新启用，将已经挂掉的节点重新启动即可

如：命令如下：

[root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7003/redis.conf 
    
    [root@localhost ~]# /usr/local/redis/bin/redis-server redis_cluster/7006/redis.conf

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集群还可正常使用

[http_blog.csdn.net_duguxingfeng_article_details_78911640]: http://blog.csdn.net/duguxingfeng/article/details/78911640
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