基于redis集群设置密码的实例

2020-10-28 21:33:25

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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

config set masterauth abc config set requirepass abc config rewrite

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：

port 8000 cluster-enabled yes cluster-config-file "nodes-8000.conf" cluster-node-timeout 15000 dir "/opt/redisdata" appendonly yes appendfilename "appendonly-8000.aof" logfile "/opt/redisdata/8000.log" daemonize yes pidfile "/var/run/redis-8000.pid" dbfilename "dump-8000.rdb" cluster-require-full-coverage no

集群构建成功后的redis配置：

port 8004 cluster-enabled yes cluster-config-file "nodes-8004.conf" cluster-node-timeout 15000 dir "/opt/redisdata" appendonly yes appendfilename "appendonly-8004.aof" logfile "/opt/redisdata/8004.log" daemonize yes pidfile "/var/run/redis-8004.pid" dbfilename "dump-8004.rdb" cluster-require-full-coverage no # Generated by CONFIG REWRITE requirepass "abc" 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 127.0.0.1:800221227:S 14 Jun 07:28:49.433 * MASTER <-> SLAVE sync started21227:S 14 Jun 07:28:49.434 # Error condition on socket for SYNC: Connection refused21227:S 14 Jun 07:28:50.437 * Connecting to MASTER 127.0.0.1:800221227: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 127.0.0.1:800221227:S 14 Jun 07:29:06.507 * MASTER <-> SLAVE sync started21227:S 14 Jun 07:29:06.507 # Error condition on socket for SYNC: Connection refused21227:S 14 Jun 07:29:06.808 # Starting a failover election for epoch 10.21227:S 14 Jun 07:29:06.810 # Failover election won: I'm the new master.21227:S 14 Jun 07:29:06.810 # configEpoch set to 10 after successful failover21227:M 14 Jun 07:29:06.810 * Discarding previously cached master state.

3.再次启动8002，查看8005的日志，8002已经变成8005的slave

21227:M 14 Jun 07:32:53.511 * Slave 127.0.0.1:8002 asks for synchronization21227:M 14 Jun 07:32:53.511 * Full resync requested by slave 127.0.0.1:800221227:M 14 Jun 07:32:53.511 * Starting BGSAVE for SYNC with target: disk21227:M 14 Jun 07:32:53.511 * Background saving started by pid 2161321613:C 14 Jun 07:32:53.513 * DB saved on disk21613:C 14 Jun 07:32:53.513 * RDB: 0 MB of memory used by copy-on-write21227:M 14 Jun 07:32:53.612 * Background saving terminated with success21227:M 14 Jun 07:32:53.612 * Synchronization with slave 127.0.0.1:8002 succeeded

4.简单测试了GET SET命令，正常

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