记录一次部署一个三节点的哨兵集群踩坑经历

Posted 2023-02-27 背井

1、redis-mster节点【IP 172.16.198.135】

1.1、建俩文件目录

mkdir /etc/sentinel
mkdir -p /var/sentinel/5000

1.2、在 /etc/sentinel下创建sentinel.conf文件

vi sentinel.conf

1.3、sentinel.conf内容

port 5000
dir /var/sentinel/5000
sentinel monitor mymaster 172.16.198.135 6379 2
sentinel auth-pass mymaster master-slave
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 60000
bind 172.16.198.135
protected-mode yes

2、redis-slaver-1节点【172.16.198.136】

2.1、建俩文件目录

mkdir /etc/sentinel
mkdir -p /var/sentinel/5000

2.2、在/etc/sentinel下创建sentinel.conf文件

vi sentinel.conf

2.3、sentinel.conf内容

port 5000
dir /var/sentinel/5000
sentinel monitor mymaster 172.16.198.135 6379 2
sentinel auth-pass mymaster master-slave
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 60000
bind 172.16.198.136
protected-mode yes

3、redis-slaver-2节点【172.16.198.137】

3.1、建俩文件目录

mkdir /etc/sentinel
mkdir -p /var/sentinel/5000

3.2、在 /etc/sentinel下创建sentinel.conf文件

vi sentinel.conf

3.3、sentinel.conf内容

port 5000
dir /var/sentinel/5000
sentinel monitor mymaster 172.16.198.135 6379 2
sentinel auth-pass mymaster master-slave
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 60000
bind 172.16.198.137
protected-mode yes

4、配置成功以后依次启动

4.1、启动172.16.198.135

命令

[root@emooco sentinel]# redis-sentinel /etc/sentinel/sentinel.conf

图解

4.2、启动172.16.198.136

命令

[root@emooco sentinel]# redis-sentinel /etc/sentinel/sentinel.conf

图解

4.3、启动172.16.198.137

命令

[root@emooco sentinel]# redis-sentinel /etc/sentinel/sentinel.conf

图解

5、检查哨兵状态

5.1、从IP为172.16.198.135的机器上查看哨兵状态

[root@emooco sentinel]# redis-cli -h 172.16.198.135 -p 5000

redis-cli -h 【哨兵所在的IP】 -p 【哨兵端口号】
也可以从其他机器上查看哨兵状态

5.2、检查命令的解释

ping 正常会返回pong
sentinel masters 返回被监视的所有master及状态
sentinel master <master name> 返回指定的master及状态
setntinel slaves <master name>返回slave及状态
sentinel sentinels <master name> 返回sentinel及状态
sentinel get-master-addr-by-name mymaster 返回现在的master IP和Port
sentinel reset * 清理已经移除的master-slave或者sentinel信息
sentinel failover <master name>手动执行故障转移
sentinel ckquorum <master name> 返回(OK 3 usable Sentinels. Quorum and failover authorization can be reached)
sentinel flushconfig 如果sentinel.conf丢失，可以使用这个命令生成新的配置文件

5.3、图解比如获取meter节点信息

6、sentinel.conf里的相关配置的解释

图解-

sentinel.conf 文件redis就在安装包的解压目录里面，哨兵的配置相关的解释可以在上图红色标注的面找到

7、踩坑

7.1、杀进程

ps -ef | grep redis
kill -9 30477
kill -9 114525

7.2、重新配置redis.conf文件

[root@emooco redis]# pwd
/etc/redis
vi 6379.conf

[可以参考这篇文章](https://blog.csdn.net/wildwolf_001/article/details/115356542)

7.3、重新配置sentinel.conf文件

[root@emooco sentinel]# pwd
/etc/sentinel

vi sentinel.conf

7.4、删除pid文件

[root@emooco run]# pwd
/var/run

rm -rf redis_6379.pid
rm -rf redis-sentinel.pid

如果有redis-sentinel.pid文件也要删除

7.5、重启redis

[root@emooco sentinel]# cd /etc/init.d/
[root@emooco sentinel]# ./redis_6379 start

7.6、重启sentinel

[root@emooco sentinel]# redis-sentinel /etc/sentinel/sentinel.conf