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怎么實(shí)現(xiàn)Redis主從復(fù)制-創(chuàng)新互聯(lián)

本篇內(nèi)容介紹了“怎么實(shí)現(xiàn)Redis主從復(fù)制”的有關(guān)知識,在實(shí)際案例的操作過程中,不少人都會遇到這樣的困境,接下來就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧!希望大家仔細(xì)閱讀,能夠?qū)W有所成!

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架構(gòu)

主 192.168.2.222

從 192.168.2.187

從 192.168.2.188

從庫配置文件添加:

從 192.168.2.187

從 192.168.2.188

[root@rac1 config]# pwd

/usr/local/redis/config

[root@rac1 config]# vim redis.conf 

#添加 

slaveof 192.168.2.222 6379

重啟數(shù)據(jù)庫

[root@rac1 config]# redis-cli -p 6379 shutdown 

[root@rac1 config]# redis-server redis.conf 

驗(yàn)證數(shù)據(jù)同步

主庫2.222

[root@cjcos src]# redis-cli 

127.0.0.1:6379> set station dba

OK

127.0.0.1:6379> get station

"dba"

從庫2.187

[root@rac1 config]# redis-cli 

127.0.0.1:6379> get station

"dba"

從庫2.188

[root@rac2 config]# redis-cli 

127.0.0.1:6379> get station

"dba"

主庫2.222查看同步信息

127.0.0.1:6379> info replication

# Replication

role:master

connected_slaves:2

slave0:ip=192.168.2.187,port=6379,state=online,offset=11208,lag=1

slave1:ip=192.168.2.188,port=6379,state=online,offset=11208,lag=1

master_replid:231ff9d15411b50038a43bb0726580f4dd788f80

master_replid2:0000000000000000000000000000000000000000

master_repl_offset:11208

second_repl_offset:-1

repl_backlog_active:1

repl_backlog_size:1048576

repl_backlog_first_byte_offset:1

repl_backlog_histlen:11208

同步日志

主庫2.222

----redis.log

8511:M 23 Mar 2020 14:53:51.841 * Background saving terminated with success

8511:M 23 Mar 2020 14:53:51.842 * Synchronization with replica 192.168.2.187:6379 succeeded

8511:M 23 Mar 2020 14:53:57.272 * Replica 192.168.2.188:6379 asks for synchronization

8511:M 23 Mar 2020 14:53:57.272 * Full resync requested by replica 192.168.2.188:6379

8511:M 23 Mar 2020 14:53:57.272 * Starting BGSAVE for SYNC with target: disk

8511:M 23 Mar 2020 14:53:57.272 * Background saving started by pid 8528

8528:C 23 Mar 2020 14:53:57.326 * DB saved on disk

8528:C 23 Mar 2020 14:53:57.327 * RDB: 0 MB of memory used by copy-on-write

常見問題:

同步失敗,日志如下: 

----redis.log

29884:S 23 Mar 2020 14:50:29.152 * Connecting to MASTER 192.168.2.222:6379

29884:S 23 Mar 2020 14:50:29.152 * MASTER <-> REPLICA sync started

29884:S 23 Mar 2020 14:50:29.152 * Non blocking connect for SYNC fired the event.

29884:S 23 Mar 2020 14:50:29.153 # Error reply to PING from master: '-DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect'

解決方案:

---配置文件redis.conf添加:

bind 0.0.0.0

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