redis配置
一.主从复制配置
1.配置环境
server1：主（172.25.14.1）
server2：从（172.25.14.2）
1.sever1和server2源码安装redis
[root@server1 ~]# tar zxf redis-4.0.8.tar.gz
[root@server1 ~]# cd redis-4.0.8
[root@server1 redis-4.0.8]# yum install gcc -y
[root@server1 redis-4.0.8]# make
[root@server1 redis-4.0.8]# make install
[root@server1 redis-4.0.8]# cd utils/
[root@server1 utils]# ./install_server.sh ##启动redis
Welcome to the redis service installer
This script will help you easily set up a running redis server
Please select the redis port for this instance: [6379]
Selecting default: 6379
Please select the redis config file name [/etc/redis/6379.conf]
Selected default - /etc/redis/6379.conf
Please select the redis log file name [/var/log/redis_6379.log]
Selected default - /var/log/redis_6379.log
Please select the data directory for this instance [/var/lib/redis/6379]
Selected default - /var/lib/redis/6379
Please select the redis executable path [/usr/local/bin/redis-server]
Selected config:
Port : 6379
Config file : /etc/redis/6379.conf
Log file : /var/log/redis_6379.log
Data dir : /var/lib/redis/6379
Executable : /usr/local/bin/redis-server
Cli Executable : /usr/local/bin/redis-cli
Is this ok? Then press ENTER to go on or Ctrl-C to abort.
Copied /tmp/6379.conf => /etc/init.d/redis_6379
Installing service...
Successfully added to chkconfig!
Successfully added to runlevels 345!
Starting Redis server...
Installation successful!
2.master机配置
[root@server1 utils]# vim /etc/redis/6379.conf
70 bind 0.0.0.0
[root@server1 utils]# /etc/init.d/redis_6379 stop
Stopping ...
Redis stopped
[root@server1 utils]# /etc/init.d/redis_6379 start
Starting Redis server...
[root@server1 utils]# netstat -antlp
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:6379 0.0.0.0:* LISTEN 7296/redis-server 0
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 891/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1505/master
tcp 0 0 172.25.14.1:22 172.25.14.250:59458 ESTABLISHED 1555/sshd
tcp 0 0 127.0.0.1:6379 127.0.0.1:43122 TIME_WAIT -
tcp 0 0 :::22 :::* LISTEN 891/sshd
tcp 0 0 ::1:25 :::* LISTEN 1505/master 3.配置slave端
[root@server2 utils]# vim /etc/redis/6379.conf
70 bind 0.0.0.0
[root@server2 utils]# vim /etc/redis/6379.conf
284 slaveof 172.25.14.1 6379
[root@server2 utils]# /etc/init.d/redis_6379 restart
Stopping ...
Redis stopped
Starting Redis server...4、测试：
master：
[root@server1 utils]# redis-cli
127.0.0.1:6379> set name westos
OK
127.0.0.1:6379> get name
"westos"slave：
[root@server2 utils]# redis-cli
127.0.0.1:6379> get name
"westos"在master
127.0.0.1:6379> set name linux
OK
127.0.0.1:6379> get name
"linux"在slave
127.0.0.1:6379> get name
"linux"二、master-slave自动切换配置
配置环境：
server1：master
server2：slave
server3：slave
在上个实验的前提下将server3设置成slave，配置方法与server2一致。
在master机
[root@server1 ~]# cd redis-4.0.8
[root@server1 redis-4.0.8]# cp sentinel.conf /etc/redis/
[root@server1 redis-4.0.8]# cd /etc/redis/
[root@server1 redis]# vim sentinel.conf
15 bind 0.0.0.0
16 #
17 protected-mode no
98 sentinel monitor mymaster 172.25.14.3 6379 2
106 sentinel down-after-milliseconds mymaster 10000
131 sentinel config-epoch mymaster 1
[root@server1 redis]# scp sentinel.conf server2:/etc/redis/
sentinel.conf 100% 7590 7.4KB/s 00:00
[root@server1 redis]# scp sentinel.conf server3:/etc/redis/
sentinel.conf 100% 7590 7.4KB/s 00:00 三台主机都开启成功后会有以下内容
在三台主机上操作
redis-server /etc/redis/sentinel.conf --sentinel
测试：
将master down掉以后
会自动选举新的master出来（可能需要一两分钟）：
另开一个shell
server1：
[root@server1 ~]# redis-cli
127.0.0.1:6379> shutdown
[root@server1 redis]# vim sentinel.conf ##查看文件可以看到新写入的内容
sentinel leader-epoch mymaster 1
sentinel known-slave mymaster 172.25.14.1 6379
sentinel known-slave mymaster 172.25.14.2 6379
sentinel known-sentinel mymaster 172.25.14.3 26379 a5e357ee96f1ae04e9ff4831720ef7c07ee09449
sentinel known-sentinel mymaster 172.25.14.2 26379 82bd07db8aa027ffcb2e076e5eb820e59094e9a5
sentinel current-epoch 1查看server2和server3看谁是新的master
[root@server1 ~]# /etc/init.d/redis_6379 start
Starting Redis server...
[root@server1 ~]# cd /etc/redis/
[root@server1 redis]# vim sentinel.conf
[root@server1 redis]# redis-cli -h 172.25.14.3
172.25.14.3:6379> get name
"linux"
172.25.14.3:6379> set name westos
OK
172.25.14.3:6379> get name
"westos"
172.25.14.3:6379>
[root@server1 redis]# redis-cli
127.0.0.1:6379> get name
"westos"
127.0.0.1:6379> 重新选出master后，配置文件会自动修改
此时修改down掉的redis的配置文件:6379.conf，重新指向新的master，并重启服务