• redis主从配置及主从切换


    环境描述:

    主redis:192.168.10.1 6379
    从redis:192.168.10.2 6380

    一、主从配置

    1、将主从redis配置文件redis.conf中的aemonize no 改为 yes

    2、修改从redis配置文件redis.conf中的port 6379 改为 6380,添加slaveof 192.168.10.1 6379

    3、启动主从服务

    主redis:

    [root@localhost redis-2.8.3]# src/redis-server /soft/redis-2.8.3-master/redis-2.8.3/redis.conf

     从redis:

     [root@localhost redis-2.8.3]# src/redis-server /soft/redis-2.8.3-slave/redis-2.8.3/redis.conf

    4、测试数据同步

    主redis:

    [root@localhost redis-2.8.3]# src/redis-cli -p 6379
    127.0.0.1:6379> set name abc
    OK
    127.0.0.1:6379> get name
    "abc"
    127.0.0.1:6379>

    从redis:

    [root@localhost redis-2.8.3]# src/redis-cli -p 6380
    127.0.0.1:6380> get name
    "abc"
    127.0.0.1:6380>

    5、默认是读写分离的

    在从redis:

    [root@localhost redis-2.8.3]# src/redis-cli -p 6380
    127.0.0.1:6380> set name 123
    (error) READONLY You can't write against a read only slave.

    二、主从切换

    1、停止主redis

    [root@localhost redis-2.8.3]# src/redis-cli -n 6379 shutdown
    [root@localhost redis-2.8.3]# src/redis-cli -p 6379
    Could not connect to Redis at 127.0.0.1:6379: Connection refused
    not connected>

    2、将从redis设成主redis

    [root@localhost redis-2.8.3]# src/redis-cli -p 6380 slaveof NO ONE
    OK

    3、测试从redis是否切换从主redis

    [root@localhost redis-2.8.3]# src/redis-cli -p 6380
    127.0.0.1:6380> set name 123
    OK
    127.0.0.1:6380> get name
    "123"
    127.0.0.1:6380>

    4、原来的主redis恢复正常了,要重新切换回去

    1)将现在的主redis的数据进行保存

    [root@localhost redis-2.8.3]# src/redis-cli -p 6380
    127.0.0.1:6380> get name
    "abc"
    127.0.0.1:6380> set name 123
    OK
    127.0.0.1:6380> get name
    "123"
    127.0.0.1:6380> save
    OK
    127.0.0.1:6380> get name
    "123"
    127.0.0.1:6380>  

    2)将现在的主redis根目录下dump.rdb文件拷贝覆盖到原来主redis的根目录

    3)启动原来的主redis

    [root@localhost redis-2.8.3]# src/redis-server /soft/redis-2.8.3-master/redis-2.8.3/redis.conf

    4)在现在的主redis中切换

    [root@localhost redis-2.8.3]# src/redis-cli -p 6380 slaveof 192.168.10.1 6379
    OK

    本文转自:http://blog.csdn.net/zfl092005/article/details/17523945

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  • 原文地址:https://www.cnblogs.com/dreammyle/p/5741160.html
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