Redis集群故障转移,主从切换！Redis Sentinel

雨点打透心脏的1/2处 2023-10-07 13:17 5阅读 0赞

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、![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxTDUyMGxU_size_16_color_FFFFFF_t_70 1]  
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在Xshell  
第一步 cd src (进入src)里  
ll 查看src 内容  
查看如何启动 sentinel 了！  
退出当前目录,回到前一个目录cd …  
输入 ./src/redis-sentinel sentinel-26379.conf(启动了 26379的机器)  
在输入 netstat -tupnl 是查看详情！！ 发现 26379被启动了  
./src/redis-cli -p 7000进入指定的端口里面！

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxTDUyMGxU_size_16_color_FFFFFF_t_70 5]  
以次开启 sentinel的机器！！！netstat -tupnl 可以查看是否开启！！ 然后下面开启 redis 另外三个机器  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxTDUyMGxU_size_16_color_FFFFFF_t_70 6]  
已经全部被开启！！  
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下图是查询主机 7000有没有数据！！！因为提前已经配置好了！！在发现其他从机也可以理解 都是没有数据的！！！！ 7001和7002 是从机

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开始对主机插入数据！！  
7000  
![在这里插入图片描述][20200419170322611.png]  
7001  
![在这里插入图片描述][20200419170341571.png]  
7002  
![在这里插入图片描述][20200419170415310.png]

**主机能读写！！！从机只能读！！不能写！**

为了查看 能不能主从切换！！我们关掉了 7000主机,**等待几分钟！**  
![在这里插入图片描述][20200419170623262.png]  
下图是7001的redis  
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7002redis 没有断开之前的 日志文件信息  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxTDUyMGxU_size_16_color_FFFFFF_t_70 10]  
从机之前的信息！  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxTDUyMGxU_size_16_color_FFFFFF_t_70 11]

**当主从切换以后！！！关闭之前的主机 7000的时候！！**  
7002变为了 主机！！！ 7001变成了从机

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxTDUyMGxU_size_16_color_FFFFFF_t_70 12]  
重启之前的7000主机！！发现也是变成了 7002的从机！！！7002是主机！！

![在这里插入图片描述][20200419173103271.png]  
7002 info 信息的显示！！！ 它的手下有二台从机！ 7000 7001  
![在这里插入图片描述][20200419173215692.png]

因为这些**日志文件** **记住了 你的故障转移步骤**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxTDUyMGxU_size_16_color_FFFFFF_t_70 13]

**主从切换之前！！！ 7000是主机 7001 7002是从机  
主从切换之后！！！随机切换了！！7002是主机 7001是从机 7000重新启动也变成了从机**

**通过日志文件 来查看主从切换！！故障转移的步骤**

--------------------

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故障切换  
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port 26380
    daemonize yes
    logfile "26380.log"
    dir "./"
    sentinel monitor mymaster 192.168.178.128 7000 2
    sentinel down-after-milliseconds mymaster 30000
    sentinel parallel-syncs mymaster 1
    sentinel failover-timeout mymaster 15000
    bind 0.0.0.0

链接:[主从复制！][Link 1] 详情！

port 7001
    daemonize yes
    logfile "7001.log"
    dir "./"
    slaveof 192.168.178.128 7000
    bind 0.0.0.0

### Redis集群，主要用于监控主机，有故障切换主机 简称哨兵 ###

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[20200419170415310.png]: https://img-blog.csdnimg.cn/20200419170415310.png
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[20200419173103271.png]: https://img-blog.csdnimg.cn/20200419173103271.png
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[Link 1]: https://blog.csdn.net/sqL520lT/article/details/105610914