redis主从配置+哨兵模式

1.搭建redis主从,⼀个master两个slave,加⼀个哨兵监听(sentinel),可以新建三个虚拟机,模拟环境,我的电脑没那么多虚拟机,就在⼀台虚拟机上弄的.

2.安装redis,如果是三台机器,安装redis的步骤⼀样.3.安装完redis后,复制同样的⽂件两份⽤于当slave

#复制两份redis⽂件,当从redis(端⼝6379为主redis,端⼝6380,6381两个为从redis)[root@localhost src]# cp -r /usr/redis/redis-3.2.4 /usr/redis/redis-6380[root@localhost src]# cp -r /usr/redis/redis-3.2.4 /usr/redis/redis-6381

4.修改两份 redis.conf 配置⽂件

[root@localhost src]# vi /usr/redis/redis-6380/redis.conf[root@localhost src]# vi /usr/redis/redis-6381/redis.conf

redis.conf 配置⽂件中主要改的地⽅(以/usr/redis/redis-6380/redis.conf⽂件为例)

1.bind 192.168.200.108(改为虚拟机的ip)2.port 6380(端⼝号)

3.daemonize yes(守护进程)

4.pidfile \"/var/run/redis_6380.pid\"(进程的⽬录)

5.slaveof 192.168.200.108 6380(设置为此redis为slave,端⼝号是6380)6.slave-read-only yes(只读)

5.修改两份 sentinel.conf 配置⽂件

[root@localhost src]# vi /usr/redis/redis-6380/sentinel.conf[root@localhost src]# vi /usr/redis/redis-6381/sentinel.conf

sentinel.conf 配置⽂件修改的地⽅

1.port 26379(端⼝号,可以使⽤默认端⼝)

2.sentinel monitor master 192.168.200.108 6379 2(主redis的名称,ip和端⼝)

6.在主redis配置哨兵监听

[root@localhost src]# vi /usr/redis/redis-3.2.4/sentinel.conf#修改要监听的主机ip和端⼝

sentinel monitor mymaster 192.168.200.108 6379 1

7.在/etc/init.d⽂件中复制两份redis启动脚本(脚本内容见之前写的 ⽂章)

修改端⼝号和⽂件路径(以redis-6380为例)

8.启动三台redis

启动哨兵

[root@localhost ~]# ps -ef|grep redis

root 3403 1 0 20:28 ? 00:00:00 /usr/redis/redis-3.2.4/src/redis-server 192.168.200.108:6379 root 3415 1 0 20:28 ? 00:00:00 /usr/redis/redis-6380/src/redis-server 192.168.200.108:6380 root 3427 1 0 20:28 ? 00:00:00 /usr/redis/redis-6381/src/redis-server 192.168.200.108:6381 root 3432 3373 0 20:28 pts/1 00:00:00 grep redis[root@localhost ~]# cd /usr/redis/redis-3.2.4

[root@localhost redis-3.2.4]# src/redis-sentinel sentinel.conf &[1] 3443

[root@localhost redis-3.2.4]# 3443:X 02 Mar 20:30:29.076 * Increased maximum number of open files to 10032 (it was originally set to 1024). _._ _.-``__ ''-._

_.-`` `. `_. ''-._ Redis 3.2.4 (00000000/0) bit .-`` .-```. ```\\/ _.,_ ''-._ ( ' , .-` | `, ) Running in sentinel mode |`-._`-...-` __...-.``-._|'` _.-'| Port: 26379 | `-._ `._ / _.-' | PID: 3443

`-._ `-._ `-./ _.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | http://redis.io `-._ `-._`-.__.-'_.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | `-._ `-._`-.__.-'_.-' _.-' `-._ `-.__.-' _.-' `-._ _.-' `-.__.-'

3443:X 02 Mar 20:30:29.104 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.3443:X 02 Mar 20:30:29.104 # Sentinel ID is ec55f3b5cca3a78aae0ad0fe94c78d7612221e0b3443:X 02 Mar 20:30:29.104 # +monitor master master 192.168.200.108 6379 quorum 13443:X 02 Mar 20:30:29.104 # +monitor master mymaster 127.0.0.1 6379 quorum 23443:X 02 Mar 20:30:59.106 # +sdown master mymaster 127.0.0.1 6379

9.查看三台redis的从属关系

[root@localhost redis-3.2.4]# ps -ef|grep redis

root 3677 1 0 21:18 ? 00:00:02 /usr/redis/redis-3.2.4/src/redis-server 192.168.200.108:6379 root 3777 1 0 21:35 ? 00:00:00 /usr/redis/redis-6380/src/redis-server 192.168.200.108:6380 root 3791 1 0 21:35 ? 00:00:00 /usr/redis/redis-6381/src/redis-server 192.168.200.108:6381 root 3804 3730 0 21:37 pts/3 00:00:00 src/redis-sentinel *:26379 [sentinel]root 3810 3730 0 21:38 pts/3 00:00:00 grep redis[root@localhost redis-3.2.4]# cd /usr/redis/redis-3.2.4/src[root@localhost src]# ./redis-cli -h 192.168.200.108 -p 6379192.168.200.108:6379> info replication --->查看当前redis信息# Replication

role:master --->说明是主redisconnected_slaves:2

slave0:ip=192.168.200.108,port=6380,state=online,offset=6165957,lag=0 --->从redis端⼝和ip 192.168.200.108 6380slave1:ip=192.168.200.108,port=6381,state=online,offset=6165667,lag=0 --->从redis端⼝和ip 192.168.200.108 6381master_repl_offset:6165957repl_backlog_active:1

repl_backlog_size:1048576

repl_backlog_first_byte_offset:5117382repl_backlog_histlen:1048576

[root@localhost src]# ./redis-cli -h 192.168.200.108 -p 6380 --->连接192.168.200.108 6380查看信息192.168.200.108:6380> info replication# Replication

role:slave --->从redis

master_host:192.168.200.108 --->主redis ipmaster_port:6379 --->主redis端⼝master_link_status:up

master_last_io_seconds_ago:0master_sync_in_progress:0slave_repl_offset:4430slave_priority:100slave_read_only:1connected_slaves:0master_repl_offset:0repl_backlog_active:0

repl_backlog_size:1048576

repl_backlog_first_byte_offset:0repl_backlog_histlen:0192.168.200.108:6380>

[root@localhost src]# ./redis-cli -h 192.168.200.108 -p 6381 --->连接192.168.200.108 6381查看信息192.168.200.108:6381> info replication # Replication

role:slave --->从redis

master_host:192.168.200.108master_port:6379

master_link_status:up

master_last_io_seconds_ago:1

master_sync_in_progress:0slave_repl_offset:73275slave_priority:100slave_read_only:1connected_slaves:0master_repl_offset:0repl_backlog_active:0

repl_backlog_size:1048576

repl_backlog_first_byte_offset:0repl_backlog_histlen:0

10.当把主redis kill 后,哨兵会监听会master,当发现master挂了后,哨兵开始故障恢复,选取⼀个从redis升级为主库常⽤命令

slaveof no one : ⼿动设置从redis,从属服务器关闭复制功能，并从从属服务器转变回主服务器，原来同步所得的数据集不会被丢弃

192.168.200.108:6380> slaveof no oneOK

slaveof host port : 将当前服务器转变为指定服务器的从属服务器(slave server)。

192.168.200.108:6381> slaveof 192.168.200.108 6379OK