Deploy redis master-slave cluster and turn on Sentinel mode

I. deployment environment

System: centos7

Complete the deployment of the master-slave cluster by starting two different redis instances on the Linux system

Yum source deployed

II. Download and installation of redis

1. Download: download from the official website

2. Installation

Create / app/ directory, and redis is installed in / app/ directory

[root@liyg~] # mkdir / app [root@liyg~] # cd / usr/local/src/ [root@liyg src] # lsredis-4.0.11.tar.gz [root@liyg src] # tar zxf redis-4.0.11.tar.gz-C / app/ [root@liyg~] # yum install-y gcc* [root@liyg~] # cd / app/redis-4.0.11/ [root@liyg redis-4.0.11] # make [root@liyg redis-4.0.11] # make install3, By configuring different ports To launch different instances [root@liyg ~] # mkdir / app/redis_ replication [root @ liyg ~] # mkdir / app/redis_replication/7001_ master [root @ liyg ~] # mkdir / app/redis_replication/7002_ slave [root @ liyg ~] # cp / app/redis-4.0.11/redis.conf / app/redis_replication/7001_master/ [root @ liyg ~] # cp / app/redis-4.0.11/redis.conf / app/redis_replication/7002_slave/

Edit master profile

[root@liyg ~] # cd / app/redis_replication/ [root @ liyg redis_replication] # vim 7001_master/redis.conf # modify port 6379 to 7001 dir / app/redis_replication/7001_master pidfile / var/run/redis_7001.pid logfile "/ app/redis_replication/7001_master/7001.log" protected-mode no # # yes to no to turn off security mode daemonize yes # # to start in daemon mode Use requirepass qwer1234 # # to enable password authentication masterauth qwer1234 # # need to add when Sentinel mode is enabled In case slave is upgraded to master, it cannot be synchronized

Edit slave profile

[root@liyg redis_replication] # vim 7001_master/redis.conf # port changed to 7002 dir / app/redis_replication/7002_slave pidfile / var/run/redis_7002.pid logfile "/ app/redis_replication/7002_slave/7002.log" protected-mode no masterauth qwer1234 # # password required for synchronizing master requirepass qwer1234 # # enable password authentication slaveof 127.0.0.1 7001 # added

Start redis

[root@liyg redis_replication] # redis-server 7001_master/redis.conf 2521:C 03 Dec 15:50:54.660 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo2521:C 03 Dec 15:50:54.661 # Redis version=4.0.11, bits=64, commit=00000000, modified=0, pid=2521 Just started2521:C 03 Dec 15:50:54.661 # Configuration loaded [root@liyg redis_replication] # redis-server 7002_slave/redis.conf 2530:C 03 Dec 15:51:07.037 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo2530:C 03 Dec 15:51:07.037 # Redis version=4.0.11, bits=64, commit=00000000, modified=0, pid=2530, just started2530:C 03 Dec 15:51:07.037 # Configuration loaded

4. Verification

[root@liyg redis_replication] # redis-cli-p 7001-a qwer1234 info replicationrole:masterconnected_slaves:1slave0:ip=127.0.0.1,port=7002,state=online,offset=70,lag=1 [root@liyg redis_replication] # redis-cli-p 7002-a qwer1234 info replicationmaster_host:127.0.0.1master_port:7001...

Create a KEY in master to check whether the slave is synchronized

[root@liyg ~] # redis-cli-p 7001-a qwer1234 set K1 t1OK [root@liyg ~] # redis-cli-p 7002-a qwer1234 get K1 "T1"

At this point, the master-slave configuration of redis is complete.

Configure redis master-slave sentinel mode

[root@liyg app] # cp redis-4.0.11/sentinel.conf redis_replication/ [root @ liyg app] # vim redis_replication/sentinel.conf protected-mode no # # turn off the security mode sentinel monitor mymaster 127.0.0.1 7002 1 sentinel auth-pass mymaster qwer1234 # # when the redis master-slave cluster has password authentication

Start

[root@liyg app] # redis-sentinel redis_replication/sentinel.conf

Verification

Close the master7001 port and see if port 7002 has been upgraded to master through the Sentinel

[root@liyg redis_replication] # redis-cli-p 7001-a qwer1234 shutdown

When master is off, you can see the Sentinel's output.

... = 'class1' > 2138Dec X 04 Dec 09 Dec 0515 525 * + slave slave 127.0.1 @ mymaster 127.0.0.1 70022138 Dec 09 Dec 0515 525 * + 645 # + sdown slave 127.0. 0.1 redis-cli 7001 127.0.0.1 7001 @ mymaster 127.0.0.1 7002 [root@liyg redis_replication] # redis-cli-p 7002-a qwer1234 info replicationrole:masterconnected_slaves:0

You can see that the original slave7002 has been upgraded to master, and start the 7001 instance again

[root@liyg redis_replication] # redis-server 7001_master/redis.conf

[root@liyg redis_replication] # redis-cli-p 7001-a qwer1234 info replication

Role:slavemaster_host:127.0.0.1master_port:7002

7001 has become a 7002 slave library, and the verification is successful.