redis cluster单机伪分布式搭

发布时间:2019-09-01 09:51:22编辑:auto阅读(1340)

    redis cluster单机伪分布式搭建--- 3主3从3哨兵集群

    最近公司引进微服务框架,之前的一台redis的预存60G已经无法满足现在的260G业务需要,经过一番考虑搭建了这套集群 . 为了方便我就用一台服务器演示,生产环境中不建议这么做(没啥用),只为记录一下过程,至于精细化的配置需要在生产中自行研究

    演示环境

    [root@localhost ~]# cat /etc/redhat-release   
    CentOS Linux release 7.4.1708 (Core)  

    redis服务部署过程

    • 我下载的是redis-4.0.14.tar.gz版本的包
    • 解压安装
      tar -zxvf redis-4.0.14.tar.gz
      make install
    • 启动服务
      ./redis-server
    • 验证,启动客户端测试
      ./redis-cli  
      127.0.0.1:6379> set ab b  
      OK  
      127.0.0.1:6379> get ab  
      "b"  
      127.0.0.1:6379> keys *  
      "ab"  
      "foo"  
    • 关闭redis服务
      ./redis-cli shutdown
    • 设置redis后台启动,在/usr/local/bin目录下
      cp /usr/local/redis/redis-4.0.8/redis.conf ./
      修改redis.conf这个配置文件,找到 daemonize no 这一行,将 no 改成 yes 保存
      然后启动redis时携带配置文件,./redis-server redis.conf
    • 在/usr/local/bin目录下修改好redis.conf配置(主要是设置后台启动、bind、密码、保护模式等)后
      mkdir /etc/redis
      cp /usr/local/bin/redis.conf /etc/redis/6379.conf
    • 将redis自带的启动脚本复制到/etc/init.d目录下,命名为redisd(通常都以d结尾表示是后台自启动服务)
      cp /usr/local/redis/redis-4.0.8/utils/redis_init_script /etc/init.d/redisd
    • 设置为开机自启动 chkconfig redisd on
      如果报错redisd 不支持 chkconfig,在/etc/init.d/redisd中增加如下片段,即可再设置开机自启动
      #!/bin/sh  
      #chkconfig:   2345 90 10  
      #description:  Redis is a persistent key-value database
    • chkconfig redisd on 成功之后即可以使用启动脚本来启动redis

      伪分布式集群的搭建

      搭建一个最小的集群需要6台机器(由节点投票机制决定至少需要3台主节点,另外为了高可用每个主节点至少要备一个从节点,所以总共需要6个节点。这里6个节点全部设在一台机上,通过端口号来分别。实现伪分布式。)

    • 在/usr/local/目录下创建文件夹redisCluster,并在redisCluster目录下创建6个文件夹
      mkdir /usr/local/redisCluster
      mkdir /usr/local/redisCluster/redis0{1,2,3,4,5,6}
    • 复制单机单实例下可正常启动redis情况下的 /usr/local/bin 目录下的所有文件分别到上面创建的6个文件夹中
      cp /usr/local/bin/* /usr/local/redisCluster/redis01/  
      cp /usr/local/bin/* /usr/local/redisCluster/redis02/  
      cp /usr/local/bin/* /usr/local/redisCluster/redis03/  
      cp /usr/local/bin/* /usr/local/redisCluster/redis04/  
      cp /usr/local/bin/* /usr/local/redisCluster/redis05/  
      cp /usr/local/bin/* /usr/local/redisCluster/redis06/
    • 再对每个实例里面的redis.conf进行修改(这里修改其中一份,然后其他5份进行复制之后修改下端口号即可)
      vi /usr/local/redisCluster/redis01/redis.conf  
      第1处: port 6379                  ————> 值 改成 7001  
      第2处: daemonize no               ————> 值 改成 yes  
      第3处: pidfile /var/run/redis_6379.pid        ————> 值 改成 ./redis_7001.pid  
      第4处: logfile ""                     ————> 值 改成 "./logs/redis_7001.log"  
      第5处: bind 127.0.0.1                 ————> 值 改成 本机IP(如我这里是192.168.25.129)  
      第6处: protected-mode yes                 ————> 值 改成 no  
      第7处: # cluster-enabled yes          ————> 去掉注释  
      第8处: # cluster-config-file nodes-6379.conf    ————> 去掉注释,并把数字改成对应端口号,如这里是7001  
      第9处: # cluster-node-timeout 15000               ————> 去掉注释   
      第10处:  appendonly no                ————> 值 改成 yes
    • 将上面编辑号保存的/usr/local/redisCluster/redis01/目录下的redis.conf文件重命名为7001.conf,然后复制5份分别放到redis02、redis03、redis04、redis05、redis06文件夹下面(可删除掉原文件夹中的redis.conf文件),然后再对每个文件夹下的.conf文件重命名为对应端口号.conf,接着编辑里面的内容,将之前修改为7001的全部修改成对应端口号保存即可
    • 将ruby脚本拷贝到redisCluster目录下
      cp /usr/local/redis/redis-4.0.8/src/redis-trib.rb /usr/local/redisCluster/
    • 创建redis集群启动、停止的脚本以及ruby创建集群的脚本并授权
      touch /usr/local/redisCluster/startCluster.sh  
      touch /usr/local/redisCluster/shutdownCluster.sh  
      touch /usr/local/redisCluster/createCluster.sh  
      chmod 777 /usr/local/redisCluster/*.sh

      startcluster.sh 内容如下:

      /usr/local/rediscluster/redis01/redis-server /usr/local/rediscluster/redis01/7001.conf  
      /usr/local/rediscluster/redis02/redis-server /usr/local/rediscluster/redis02/7002.conf  
      /usr/local/rediscluster/redis03/redis-server /usr/local/rediscluster/redis03/7003.conf  
      /usr/local/rediscluster/redis04/redis-server /usr/local/rediscluster/redis04/7004.conf  
      /usr/local/rediscluster/redis05/redis-server /usr/local/rediscluster/redis05/7005.conf  
      /usr/local/rediscluster/redis06/redis-server /usr/local/rediscluster/redis06/7006.conf 

      shutdowncluster.sh 内容如下:

      /usr/local/rediscluster/redis01/redis-cli -c -h 10.11.1.103 -p 7001 shutdown  
      /usr/local/rediscluster/redis02/redis-cli -c -h 10.11.1.103 -p 7002 shutdown  
      /usr/local/rediscluster/redis03/redis-cli -c -h 10.11.1.103 -p 7003 shutdown  
      /usr/local/rediscluster/redis04/redis-cli -c -h 10.11.1.103 -p 7004 shutdown  
      /usr/local/rediscluster/redis05/redis-cli -c -h 10.11.1.103 -p 7005 shutdown  
      /usr/local/rediscluster/redis06/redis-cli -c -h 10.11.1.103 -p 7006 shutdown 

      createcluster.sh 内容如下:
      ruby redis-trib.rb create --replicas 1 10.11.1.103:7001 10.11.1.103:7002 10.11.1.103:7003 10.11.1.103:7004 10.11.1.103:7005 10.11.1.103:7006

    • 用刚刚创建的脚本启动6个实例,再用ruby脚本创建集群
      cd /usr/local/redisCluster/  
      ./startCluster.sh  
      ./createcluster.sh(输入yes)
    • 验证,查看进程
      [root@localhost rediscluster]# ps -ef |  grep redis|grep -v grep  
      root     23716     1  0 Aug08 ?        00:10:55 /usr/local/rediscluster/redis01/redis-server *:7001 [cluster]  
      root     23721     1  0 Aug08 ?        00:10:53 /usr/local/rediscluster/redis02/redis-server *:7002 [cluster]  
      root     23723     1  0 Aug08 ?        00:10:51 /usr/local/rediscluster/redis03/redis-server *:7003 [cluster]  
      root     23731     1  0 Aug08 ?        00:13:37 /usr/local/rediscluster/redis04/redis-server *:7004 [cluster]  
      root     23736     1  0 Aug08 ?        00:10:55 /usr/local/rediscluster/redis05/redis-server *:7005 [cluster]  
      root     23741     1  0 Aug08 ?        00:08:59 /usr/local/rediscluster/redis06/redis-server *:7006 [cluster]  
    • 集群就搭建成功了。登录任意一个节点客户端验证(-c 表示以集群方式登录),也可以用redis客户端工具RedisDesktopManager来可视化地管理redis数据库。
      cd /usr/local/redisCluster/redis01/  
      ./redis-cli -h 10.11.1.103 -p 7001 -c  
      10.11.1.103:7001> set aaaa b  
      OK  
      10.11.1.103:7002> get aaaa  
      -> Redirected to slot [1953] located at 10.11.1.103:7001  
      "b"  
      10.11.1.103:7001> cluster info  
      cluster_state:ok  
      cluster_slots_assigned:16384  
      cluster_slots_ok:16384  
      cluster_slots_pfail:0  
      cluster_slots_fail:0  
      cluster_known_nodes:6  
      cluster_size:3  
      cluster_current_epoch:6  
      cluster_my_epoch:1  
      cluster_stats_messages_ping_sent:367555  
      cluster_stats_messages_pong_sent:342015  
      cluster_stats_messages_publish_sent:903835  
      cluster_stats_messages_sent:1613405  
      cluster_stats_messages_ping_received:342015  
      cluster_stats_messages_pong_received:367550  
      cluster_stats_messages_publish_received:1084495  
      cluster_stats_messages_received:1794060  
      10.11.1.103:7001>  
    • 在redis01 02 03 里配置哨兵,这里只配置了redis01的剩余的按照这个自行配置即可,需要注意的是监视的名称不可重复(已标出)
      sentinel.conf 配置如下:
      protected-mode no  
      port 27001   
      sentinel deny-scripts-reconfig yes  
      sentinel monitor **mymaster1** 10.11.1.103 7001 2  
      sentinel down-after-milliseconds **mymaster1** 10000  
      logfile "/var/log/sentinel1.log"  
      dir "/usr/local/rediscluster/redis01"  
      sentinel failover-timeout **mymaster1** 15000  
      sentinel config-epoch **mymaster1** 0  
      sentinel leader-epoch **mymaster1** 0  
      sentinel known-slave **mymaster1 10.11.1.103 7004**  
      sentinel current-epoch 0  
    • 在rediscluster目录下面创建哨兵启动和关闭的脚本
      startsentinel.sh 的内容如下
      /usr/local/rediscluster/redis01/redis-sentinel /usr/local/rediscluster/redis01/sentinel.conf &  
      /usr/local/rediscluster/redis02/redis-sentinel /usr/local/rediscluster/redis02/sentinel.conf &  
      /usr/local/rediscluster/redis03/redis-sentinel /usr/local/rediscluster/redis03/sentinel.conf &  

      stopsentinel.sh 脚本的内容如下:

      kill -9 `ps -ef |  grep sentinel| grep -v grep|awk '{print $2}'`  
    • 再次查看进程
      [root@localhost rediscluster]# ps -ef |  grep redis|grep -v grep  
      root     23716     1  0 Aug08 ?        00:10:55 /usr/local/rediscluster/redis01/redis-server *:7001 [cluster]  
      root     23721     1  0 Aug08 ?        00:10:53 /usr/local/rediscluster/redis02/redis-server *:7002 [cluster]  
      root     23723     1  0 Aug08 ?        00:10:51 /usr/local/rediscluster/redis03/redis-server *:7003 [cluster]  
      root     23731     1  0 Aug08 ?        00:13:37 /usr/local/rediscluster/redis04/redis-server *:7004 [cluster]  
      root     23736     1  0 Aug08 ?        00:10:55 /usr/local/rediscluster/redis05/redis-server *:7005 [cluster]  
      root     23741     1  0 Aug08 ?        00:08:59 /usr/local/rediscluster/redis06/redis-server *:7006 [cluster]  
      root     23924     1  0 Aug08 ?        00:09:55 /usr/local/rediscluster/redis01/redis-sentinel *:27001 [sentinel]  
      root     23925     1  0 Aug08 ?        00:09:38 /usr/local/rediscluster/redis02/redis-sentinel *:27002 [sentinel]  
      root     23926     1  0 Aug08 ?        00:10:22 /usr/local/rediscluster/redis03/redis-sentinel *:27003 [sentinel] 
    • 这样就完成搭建,以下是需要联网安装的软件
      yum -y install gcc                    ## make install 命令需要此环境  
      yum -y intall ruby                    ## 安装ruby(此时安装的可能使低版本的)  
      curl -L get.rvm.io | bash -s stable   ## 安装rvm  
      source /usr/local/rvm/scripts/rvm     ## 使安装的rvm立即生效  
      rvm install 2.4.1                 ## 通过rvm来安装ruby高级版本  
      gem install redis                     ## 通过ruby的工具包gem来安装redis接口  
    • 需要注意的是,在关闭redis集群之后,再次重复步骤启动集群时会报错,此时只需要删除redis各个实例中生成的文件即可再次按步骤启动集群

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