redis集群设置密码

逃离我推掉我的手 2022-03-08 04:12 217阅读 0赞

注意事项：

1.如果是使用redis-trib.rb工具构建集群，集群构建完成前不要配置密码，集群构建完毕再通过config set + config rewrite命令逐个机器设置密码

2.如果对集群设置密码，那么requirepass和masterauth都需要设置，否则发生主从切换时，就会遇到授权问题，可以模拟并观察日志

3.各个节点的密码都必须一致，否则Redirected就会失败

1.  config set masterauth abc
2.  config set requirepass abc
3.  config rewrite

然后配置密码后

将修改写入。否则只是当前有效，重启失效

测试版本：

redis3.0.7

测试环境：

centos7

集群规模：

3主3从

集群构建成功前的redis配置：

1.  port 8000
2.  cluster-enabled yes
3.  cluster-config-file "nodes-8000.conf"
4.  cluster-node-timeout 15000
5.  dir "/opt/redisdata"
6.  appendonly yes
7.  appendfilename "appendonly-8000.aof"
8.  logfile "/opt/redisdata/8000.log"
9.  daemonize yes
10. pidfile "/var/run/redis-8000.pid"
11. dbfilename "dump-8000.rdb"
12. cluster-require-full-coverage no

集群构建成功后的redis配置：

1.  port 8004
2.  cluster-enabled yes
3.  cluster-config-file "nodes-8004.conf"
4.  cluster-node-timeout 15000
5.  dir "/opt/redisdata"
6.  appendonly yes
7.  appendfilename "appendonly-8004.aof"
8.  logfile "/opt/redisdata/8004.log"
9.  daemonize yes
10. pidfile "/var/run/redis-8004.pid"
11. dbfilename "dump-8004.rdb"
12. cluster-require-full-coverage no
13. \# Generated by CONFIG REWRITE
14. requirepass "abc"
15. masterauth "abc"

测试：

1.8002是主，8005是8002的从，现在要kill掉8002模拟主从切换

2.查看8005的日志，8005最终被选举成新的master

21227:S 14 Jun 07:28:49.343 \# Connection with master lost.

21227:S 14 Jun 07:28:49.343 \* Caching the disconnected master state.

21227:S 14 Jun 07:28:49.433 \* Connecting to MASTER 127.0.0.1:8002

21227:S 14 Jun 07:28:49.433 \* MASTER <-> SLAVE sync started

21227:S 14 Jun 07:28:49.434 \# Error condition on socket for SYNC: Connection refused

21227:S 14 Jun 07:28:50.437 \* Connecting to MASTER 127.0.0.1:8002

21227:S 14 Jun 07:29:06.205 \# Start of election delayed for 564 milliseconds (rank \#0, offset 337).

21227:S 14 Jun 07:29:06.507 \* Connecting to MASTER 127.0.0.1:8002

21227:S 14 Jun 07:29:06.507 \* MASTER <-> SLAVE sync started