這篇文章主要介紹了Docker下redis主從配置的方法的相關(guān)知識,內(nèi)容詳細(xì)易懂,操作簡單快捷,具有一定借鑒價值,相信大家閱讀完這篇Docker下redis主從配置的方法文章都會有所收獲,下面我們一起來看看吧。
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1、拉取redis鏡像
docker pull redis
2、啟動3個redis容器服務(wù),分別使用到6379、6380、6381端口
docker run --name redis-6379 -p 6379:6379 -d redis docker run --name redis-6380 -p 6380:6379 -d redis docker run --name redis-6381 -p 6381:6379 -dredis
3、查看容器
[tcy@tcy1 ~]$ docker ps -a container id image command created status ports names a9fa77adc598 daocloud.io/library/redis "docker-entrypoint.s 2 hours ago up 2 hours 0.0.0.0:6381->6379/tcp redis-6381 6ee2f2f007e6 daocloud.io/library/redis "docker-entrypoint.s 2 hours ago up 2 hours 0.0.0.0:6380->6379/tcp redis-6380 ab54741166e1 daocloud.io/library/redis "docker-entrypoint.s 3 hours ago up 3 hours 0.0.0.0:6379->6379/tcp redis-6379
4、測試容器,成功
docker exec -it ab54741166e1 redis-cli:進(jìn)入容器 [root@tcy1 tcy]# docker exec -it ab54741166e1 redis-cli 127.0.0.1:6379> set b tcy ok 127.0.0.1:6379> get b "tcy" 127.0.0.1:6379> quit[root@tcy1 tcy]#
5、開始redis集群配置
5.1、看容器內(nèi)網(wǎng)的ip地址
[root@tcy1 tcy]# docker inspect a9fa77adc598
3個redis的內(nèi)網(wǎng)ip地址為:
redis-6379:172.17.0.1:6379 redis-6380:172.17.0.2:6379 redis-6381:172.17.0.3:6379
5.2、進(jìn)入docker容器內(nèi)部,查看當(dāng)前redis角色(主還是從)
[root@tcy1 tcy]# docker exec -it ab54741166e1 /bin/bash root@ab54741166e1:/data# redis-cli 127.0.0.1:6379> info replication # replication role:master connected_slaves:0 master_replid:d43d1ae8cde6cb084220e18b926aba79e0bb2504 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:0 second_repl_offset:-1 repl_backlog_active:0 repl_backlog_size:1048576 repl_backlog_first_byte_offset:0 repl_backlog_histlen:0 127.0.0.1:6379> quit root@ab54741166e1:/data# exit exit
目前三個都是master狀態(tài)
5.3、使用redis-cli命令修改redis-6380、redis-6381的主機(jī)為172.17.0.1:6379
[root@tcy1 tcy]# docker exec -it a9fa77adc598 /bin/bash //redis-6380 root@a9fa77adc598:/data# redis-cli 127.0.0.1:6379> slaveof 172.17.0.1 6379 ok 127.0.0.1:6379> quit root@a9fa77adc598:/data# exit exit [root@tcy1 tcy]# docker exec -it 6ee2f2f007e6 /bin/bash //redis-6381 root@6ee2f2f007e6:/data# redis-cli 127.0.0.1:6379> slaveof 172.17.0.1 6379 ok 127.0.0.1:6379> quit
5.4、查看redis-6379是否已經(jīng)擁有2個從機(jī),connected_slaves:2,是的
[root@tcy1 tcy]# docker exec -it ab54741166e1 /bin/bash root@ab54741166e1:/data# redis-cli 127.0.0.1:6379> info replication # replication role:master connected_slaves:2 slave0:ip=172.17.0.3,port=6379,state=online,offset=378,lag=1 slave1:ip=172.17.0.2,port=6379,state=online,offset=378,lag=0 master_replid:ce193b15cfd57f7dc3ccfbf2a4aef6156b131e6d master_replid2:0000000000000000000000000000000000000000 master_repl_offset:378 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:378 127.0.0.1:6379> quit root@ab54741166e1:/data# exit exit
5.5、配置sentinel哨兵
進(jìn)入3臺redis容器內(nèi)部進(jìn)行配置,在容器根目錄里面創(chuàng)建sentinel.conf文件
文件內(nèi)容為: sentinel monitor mymaster 172.17.0.1 6379 1
[root@tcy1 tcy]# docker exec -it a9fa77adc598 /bin/bash root@a9fa77adc598:/data# cd / && touch sentinel.conf root@a9fa77adc598:/# vim /sentinel.conf
如果出現(xiàn):bash: vim: command not found
解決:1、apt-get update 2、apt-get install vim
最后,啟動redis哨兵:
root@a9fa77adc598:/# redis-sentinel /sentinel.conf 342:x 24 jun 11:37:58.934 # oo0ooo0ooo0oo redis is starting oo0ooo0ooo0oo 342:x 24 jun 11:37:58.957 # redis version=4.0.10, bits=64, commit=00000000, modified=0, pid=342, just started 342:x 24 jun 11:37:58.958 # configuration loaded 342:x 24 jun 11:37:58.959 # you requested maxclients of 10000 requiring at least 10032 max file descriptors. 342:x 24 jun 11:37:58.959 # server can't set maximum open files to 10032 because of os error: operation not permitted. 342:x 24 jun 11:37:58.960 # current maximum open files is 4096. maxclients has been reduced to 4064 to compensate for low ulimit. if you need higher maxclients increase 'ulimit -n'. _._ _.-``__ ''-._ _.-`` `. `_. ''-._ redis 4.0.10 (00000000/0) 64 bit .-`` .-```. ```\/ _.,_ ''-._ ( ' , .-` | `, ) running in sentinel mode |`-._`-...-` __...-.``-._|'` _.-'| port: 26379 | `-._ `._ / _.-' | pid: 342 `-._ `-._ `-./ _.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | http://redis.io `-._ `-._`-.__.-'_.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | `-._ `-._`-.__.-'_.-' _.-' `-._ `-.__.-' _.-' `-._ _.-' `-.__.-' 342:x 24 jun 11:37:59.068 # warning: the tcp backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128. 342:x 24 jun 11:37:59.089 # sentinel id is dfd5a5bfe1036b1df3395c4ba858329034fc5b7e 342:x 24 jun 11:37:59.091 # +monitor master mymaster 172.17.0.1 6379 quorum 1 342:x 24 jun 11:37:59.110 * +slave slave 172.17.0.3:6379 172.17.0.3 6379 @ mymaster 172.17.0.1 6379 342:x 24 jun 11:37:59.115 * +slave slave 172.17.0.2:6379 172.17.0.2 6379 @ mymaster 172.17.0.1 6379 342:x 24 jun 11:39:27.601 * +sentinel sentinel ba9b0d0539d8273edfcbd922fe138f50daa78bbb 172.17.0.2 26379 @ mymaster 172.17.0.1 6379 342:x 24 jun 11:41:59.144 * +sentinel sentinel f0510f8582b72c056531f219397ed8826683e665 172.17.0.1 26379 @ mymaster 172.17.0.1 6379
便于觀察,開多個窗口。
sentinel哨兵配置完畢
5.6、測試
關(guān)閉master
[tcy@tcy1 ~]$ docker stop ab54741166e1 ab54741166e1
這時,剩余的2個從機(jī),會自動選舉產(chǎn)生新的主機(jī),這里選舉172.17.0.2為主機(jī)。
查看172.17.0.2,變成了主機(jī)。
[root@tcy1 /]# docker exec -it 6ee2f2f007e6 /bin/bash root@6ee2f2f007e6:/data# redis-cli 127.0.0.1:6379> info replication # replication role:master connected_slaves:1 slave0:ip=172.17.0.3,port=6379,state=online,offset=66906,lag=1 master_replid:5a7489c8181ddf0d73d418d30d6a4c8e039198ba master_replid2:ce193b15cfd57f7dc3ccfbf2a4aef6156b131e6d master_repl_offset:67041 second_repl_offset:65534 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:85 repl_backlog_histlen:66957 127.0.0.1:6379>
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