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  • Centos6.7 Redis3.2.8的主从搭建

    首先参看一下redis 3.2.8的安装

    传送门:biubiubiu 飞去吧:http://www.cnblogs.com/bing-yu12/p/6582086.html

    我的主从搭建:

      redis 主环境:

        centos 6.7 

        ip:192.168.184.3

        redis 3.2.8

        redis.conf的重要配置:

        bind 127.0.0.1选项后面加上192.168.184.3 让外部机器也可以访问该ip

        iptables规则清除

        selinux关闭:setenforce 0 或者vim /etc/sysconfig/selinux 中设置为disabled 

      redis 从

        配置变化部分:

        bind 127.0.0.1 即可

        从只有读的权限,所以:

        slave-read-only no 打开

        配置文件修改后,主和从都要重启redis服务,然后在主上修改数据:

        

    [root@alex redis]# ./bin/redis-cli 
    127.0.0.1:6379> set key alexander
    OK

      从上的操作读:

        

    [root@alex redis]# ./bin/redis-cli 
    127.0.0.1:6379> get key
    "alexander"

    查看日志:

      

    tail -f  /var/log/redis/redis.log
    5833:S 13 Mar 11:55:03.161 * Full resync from master: c95b2c82899b47186301e42c23dc7f53db8f48ab:970
    5833:S 13 Mar 11:55:03.245 * MASTER <-> SLAVE sync: receiving 106 bytes from master
    5833:S 13 Mar 11:55:03.246 * MASTER <-> SLAVE sync: Flushing old data
    5833:S 13 Mar 11:55:03.246 * MASTER <-> SLAVE sync: Loading DB in memory
    5833:S 13 Mar 11:55:03.247 * MASTER <-> SLAVE sync: Finished with success
    5833:S 13 Mar 11:57:59.063 * 1 changes in 900 seconds. Saving...

    说明主从搭建成功了。

    注意,在上面的步骤中少了一个从数据上拉取主上的信息的命令:

    127.0.0.1:6379> slaveof 192.168.184.3 6379
    OK
    127.0.0.1:6379> get key
    "alex"

    当在从上写数据的时候,会打破redis的主从关系,这个时候,你也可以使用该命令回复主从关系,你也可以在从的配置文件中指定:

    slaveof 192.168.184.3 6379

    对于该配置文件的解释:文档中有这样的说明:

    ################################# REPLICATION #################################

    # Master-Slave replication. Use slaveof to make a Redis instance a copy of
    # another Redis server. A few things to understand ASAP about Redis replication.
    #
    # 1) Redis replication is asynchronous, but you can configure a master to
    # stop accepting writes if it appears to be not connected with at least
    # a given number of slaves. 
    # 2) Redis slaves are able to perform a partial resynchronization with the
    # master if the replication link is lost for a relatively small amount of
    # time. You may want to configure the replication backlog size (see the next
    # sections of this file) with a sensible value depending on your needs.
    # 3) Replication is automatic and does not need user intervention. After a
    # network partition slaves automatically try to reconnect to masters
    # and resynchronize with them. 
    #
    slaveof 192.168.184.3 6379
    # slaveof <masterip> <masterport>

    看第二条:大概的意思就是,如果主从关系紊乱,当主上的数据再修改以后,那么从上的数据会自动和主上的数据进行同步。

    如有疑问,欢迎讨论QQ:1443353268 

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  • 原文地址:https://www.cnblogs.com/bing-yu12/p/6583008.html
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