• redis集群cluster简单设置


    环境:

    这里参考官方使用一台服务器:Centos 7  redis-5.0.4    192.168.10.10

    redis集群cluster最少要3个主节点,所以本次需要创建6个实例:3个主节点,3个从节点。

    1、创建cluster工作目录

    [root@localhost ~]# mkdir -p /opt/redis-5.0.4/cluster-test/{7000,7001,7002,7003,7004,7005}

    2、创建cluster的配置文件

    [root@localhost ~]# cd /opt/redis-5.0.4/cluster-test/
    [root@localhost cluster-test]# vim 7000/redis.conf
    port 7000       // 端口号
    daemonize yes   // 开启守护进程
    dir "/opt/redis-5.0.4/cluster-test/data"  // 集群的工作目录
    logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7000.log" // 日志文件
    dbfilename "dump-7000.rdb" 
    cluster-enabled yes   // 启用集群功能
    cluster-config-file nodes-7000.conf   // 集群配置文件的名字
    cluster-require-full-coverage no  // #redis cluster需要16384个slot都正常的时候才能对外提供服务,换句话说,只要任何一个slot异常那么整个cluster不对外提供服务。 因此生产环境一般为no
    cluster-node-timeout 5000  //请求超时  默认15秒,可自行设置
    appendonly yes  //aof日志开启  有需要就开启,它会每次写操作都记录一条日志

     由于这6个实例的配置文件除了端口以外基本相同。所以我们将redis.conf分别复制一份到剩下的7001、7002、7003、7004、7005的目录下然后修改对应的端口。

    最终的配置文件看起来向下面这样

    [root@localhost cluster-test]# vim 7000/redis.conf
    port 7000
    daemonize yes
    dir "/opt/redis-5.0.4/cluster-test/data"
    logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7000.log"
    dbfilename "dump-7000.rdb"
    cluster-enabled yes
    cluster-config-file nodes-7000.conf
    cluster-require-full-coverage no
    cluster-node-timeout 5000
    appendonly yes
    
    ---------------------------------------------------------------------
    
    [root@localhost cluster-test]# vim 7001/redis.conf
    port 7001
    daemonize yes
    dir "/opt/redis-5.0.4/cluster-test/data"
    logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7001.log"
    dbfilename "dump-7001.rdb"
    cluster-enabled yes
    cluster-config-file nodes-7001.conf
    cluster-require-full-coverage no
    cluster-node-timeout 5000
    appendonly yes
    
    ------------------------------------------------------------------------
    
    [root@localhost cluster-test]# vim 7002/redis.conf
    port 7002
    daemonize yes
    dir "/opt/redis-5.0.4/cluster-test/data"
    logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7002.log"
    dbfilename "dump-7002.rdb"
    cluster-enabled yes
    cluster-config-file nodes-7002.conf
    cluster-require-full-coverage no
    cluster-node-timeout 5000
    appendonly yes
    
    ------------------------------------------------------------------------
    
    [root@localhost cluster-test]# vim 7003/redis.conf
    port 7003
    daemonize yes
    dir "/opt/redis-5.0.4/cluster-test/data"
    logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7003.log"
    dbfilename "dump-7003.rdb"
    cluster-enabled yes
    cluster-config-file nodes-7003.conf
    cluster-require-full-coverage no
    cluster-node-timeout 5000
    appendonly yes
    
    ------------------------------------------------------------------------
    
    [root@localhost cluster-test]# vim 7004/redis.conf
    port 7004
    daemonize yes
    dir "/opt/redis-5.0.4/cluster-test/data"
    logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7004.log"
    dbfilename "dump-7004.rdb"
    cluster-enabled yes
    cluster-config-file nodes-7004.conf
    cluster-require-full-coverage no
    cluster-node-timeout 5000
    appendonly yes
    
    ------------------------------------------------------------------------
    
    [root@localhost cluster-test]# vim 7005/redis.conf
    port 7005
    daemonize yes
    dir "/opt/redis-5.0.4/cluster-test/data"
    logfile "/opt/redis-5.0.4/cluster-test/log/cluster-7005.log"
    dbfilename "dump-7005.rdb"
    cluster-enabled yes
    cluster-config-file nodes-7005.conf
    cluster-require-full-coverage no
    cluster-node-timeout 5000
    appendonly yes
    redis.conf

    创建好配置文件,在创建对应的cluster工作目录和日志文件目录

    [root@localhost ~]# mkdir -p /opt/redis-5.0.4/cluster-test/data
    [root@localhost ~]# mkdir -p /opt/redis-5.0.4/cluster-test/log

    3、运行集群

    这里需要注意:
    如果你使用的是Redis 5,我们可以使用redis-cli中的Redis集群命令行实用程序来创建新的集群、检查或重新分割现有集群,等等。
    对于Redis版本3或4,需要使用redis-trib。可以在Redis源代码发行版的src目录中找到它。需要安装redis gem才能运行redis-trib,而gem需要reby环境,所以需要安装reby

    如果是redis版本5以下的请按照下面安装reby环境和redis.gem。

    3.1安装reby环境

    [root@localhost cluster-test]# wget -P /opt/source https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.1.tar.gz
    [root@localhost cluster-test]# tar -zxvf /opt/source/ruby-2.3.1.tar.gz -C /opt/
    [root@localhost cluster-test]# cd /opt/ruby-2.3.1/
    [root@localhost ruby-2.3.1]# ./configure --prefix=/opt/ruby231
    [root@localhost ruby-2.3.1]# make && make install
    [root@localhost bin]# vim /etc/profile // 添加环境变量
    PATH="/opt/python362/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/opt/tngx230/sbin:/opt/node-v8.6.0-linux-x64/bin:/opt/ruby231/bin"
    [root@localhost src]# cp /opt/ruby231/bin/ruby /usr/local/ // redis-trib.rb会到这里去找reby
    [root@localhost src]# cp /opt/ruby231/bin/gem /usr/local/
    [root@localhost bin]# source /etc/profile // 使配置立即生效

    3.2安装redis.gem

    [root@localhost ~]# gem install redis

    3.3开启redis实例 

    [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7000/redis.conf 
    [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7001/redis.conf 
    [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7002/redis.conf 
    [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7003/redis.conf 
    [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7004/redis.conf 
    [root@localhost ~]# redis-server /opt/redis-5.0.4/cluster-test/7005/redis.conf 

    开启成功后,看起来像下面这样:

    3.3运行集群

    [root@localhost src]# ./redis-trib.rb create --replicas 1 127.0.0.1:7000 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

    如果是redis5.0以上版本会有如下提示信息:

     对于3或4版本的盆友,我也就只能走到这里了,下面我将以5.0版本进行操作。

    4、运行集群

    [root@localhost src]# redis-cli --cluster create 127.0.0.1:7000 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 --cluster-replicas 1

    命令执行成功后,会看到如下界面:

     

     输入yes根据上面的配置进行设置开启集群,集群开启成功后如下所示:

     5、查看集群状态

    redis-cli -p 7000 cluster info   // 查看节点详细信息
    redis-cli -p 7000 cluster nodes  // 查看所有节点
    redis-cli -p 7000 cluster nodes | grep master  // 过滤出主节点
    redis-cli -p 7000 cluster nodes | grep slave   // 过滤出从节点

     6、验证集群

    开两个shell登陆redis实例

    [root@localhost ~]# redis-cli -c -p 7000   // 登陆7000的实例
    [root@localhost ~]# redis-cli -c -p 7003   // 登陆7003的实例

     --------------------------------------------------------------------------------到此redis集群就算简单的实现了-----------------------------------------------------------------

    参考文档:https://redis.io/topics/cluster-tutorial

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  • 原文地址:https://www.cnblogs.com/caesar-id/p/10850152.html
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