推荐步骤：
➢ 在 Centos01 配置 ntp 服务器，Centos02 和 Centos02 和 Centos03 以及 Centos04 配置同步时间，在 Centos01
和 Centos02 以及 Centos03 和 Centos04 安装 Redis 服务器
➢ 配置 Redis 主从复制群集，在 Centos01 配置主 Redis 节点，Centos02 为第一台从 Redis 节点，Centos03 为第
二台从节点，验证主从复制
➢ 在 Centos04 上安装 Redis 配置 Redis 哨兵模式，监控主从 Redis 节点运行状态，主 Redis 故障自动切换到新主
Redis 服务器
实验步骤：
一、在 Centos01 配置 ntp 服务器，Centos02 和 Centos02 和 Centos03 以及
Centos04 配置同步时间，在 Centos01 和 Centos02 以及 Centos03 和 Centos04
安装 Redis 服务器
1、配置时间服务器
1）修改时间服务器配置文件
[root@centos01 ~]# vim /etc/ntp.conf
restrict 192.168.100.0 mask 255.255.255.0 nomodify notrap
server 127.127.1.0
fudge 127.127.1.0 stratum 8
2）重新启动时间服务器设置开机自动启动
[root@centos01 ~]# systemctl restart ntpd
[root@centos01 ~]# systemctl enable ntpd
3）从 redis 服务器同步时间
3）从 redis 服务器同步时间
[root@centos02 ~]# ntpdate 192.168.100.10
14 Mar 01:06:14 ntpdate[1143]: adjust time server 192.168.100.10 offset 0.147980 sec
[root@centos03 ~]# ntpdate 192.168.100.10
14 Mar 01:06:22 ntpdate[1143]: adjust time server 192.168.100.10 offset -0.227113
sec
[root@centos04 ~]# ntpdate 192.168.100.10
14 Mar 01:06:22 ntpdate[1143]: adjust time server 192.168.100.10 offset -0.227113
sec
2、在 Centos01 安装 Redis 服务器
1）解压移动 Redis 安装位置
[root@centos01 ~]# mount /dev/cdrom /mnt/
mount: /dev/sr0 写保护，将以只读方式挂载
[root@centos01 ~]# tar zxf /mnt/redis-3.2.9.tar.gz -C /usr/src/
[root@centos01 ~]# mv /usr/src/redis-3.2.9/ /usr/local/redis
2）配置安装 Redis 服务器
[root@centos01 redis]# make && make install
3）初始化配置 Redis 服务器
[root@centos01 redis]# cd ./utils/
[root@centos01 utils]# ./install_server.sh {一直回车}
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!
[root@centos01 utils]# cd
4）停止服务
[root@centos01 ~]# /etc/init.d/redis_6379 stop
Stopping ...
Redis stopped
3、在 Centos02 安装 Redis 服务器
1）解压移动 Redis 安装位置
[root@centos02 ~]# mount /dev/cdrom /mnt/
mount: /dev/sr0 写保护，将以只读方式挂载
[root@centos02 ~]# tar zxf /mnt/redis-3.2.9.tar.gz -C /usr/src/
[root@centos02 ~]# mv /usr/src/redis-3.2.9/ /usr/local/redis
2）配置安装 Redis 服务器
[root@centos02 redis]# make && make install
3）初始化配置 Redis 服务器
[root@centos02 redis]# cd ./utils/
[root@centos02 utils]# ./install_server.sh
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.confPlease 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!
[root@centos02 utils]# cd
4）停止服务
[root@centos02 ~]# /etc/init.d/redis_6379 stop
Stopping ...
Redis stopped
4、在 Centos03 安装 Redis 服务器
1）解压移动 Redis 安装位置
[root@centos03 ~]# mount /dev/cdrom /mnt/
mount: /dev/sr0 写保护，将以只读方式挂载
[root@centos03 ~]# tar zxf /mnt/redis-3.2.9.tar.gz -C /usr/src/
[root@centos03 ~]# mv /usr/src/redis-3.2.9/ /usr/local/redis
2）配置安装 Redis 服务器
[root@centos03 redis]# make && make install
3）初始化配置 Redis 服务器
[root@centos03 redis]# cd ./utils/
[root@centos03 utils]# ./install_server.sh
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 : 6379Config 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!
[root@centos03 utils]# cd
4）停止服务
[root@centos03 ~]# /etc/init.d/redis_6379 stop
Stopping ...
Redis stopped
5、在 Centos04 安装 Redis 服务器
1）解压移动 Redis 安装位置
[root@centos04 ~]# mount /dev/cdrom /mnt/
mount: /dev/sr0 写保护，将以只读方式挂载
[root@centos04 ~]# tar zxf /mnt/redis-3.2.9.tar.gz -C /usr/src/
[root@centos04 ~]# mv /usr/src/redis-3.2.9/ /usr/local/redi
2）配置安装 Redis 服务器
[root@centos04 redis]# make && make install
3）初始化配置 Redis 服务器
[
root@centos04 redis]# cd ./utils/
[root@centos04 utils]# ./install_server.sh
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_6379Installing service...
Successfully added to chkconfig!
Successfully added to runlevels 345!
Starting Redis server...
Installation successful!
[root@centos04 utils]# cd
4）停止服务
[root@centos04 ~]# /etc/init.d/redis_6379 stop
Stopping ...
Redis stopped
二、配置 Redis 主从复制群集，在 Centos01 配置主 Redis 节点，Centos02 为
第一台从 Redis 节点，Centos03 为第二台从节点，验证主从复制
1、修改主 Redis 配置文件
1）修改主 Redis 服务器配置文件
[root@centos01 ~]# vim /etc/redis/6379.conf
63 bind 192.168.100.10
86 port 6379
130 daemonize yes
483 requirepass pwd@123
2）启动服务
[root@centos01 ~]# /etc/init.d/redis_6379 start
Starting Redis server...
[root@centos01 ~]# netstat -anptu | grep redis-servertcp 0 0 192.168.100.10:6379 0.0.0.0:* LISTEN 4640/redis
server 1
2、修改第一台从 Redis 服务器配置文件
1）修改第一台从 Redis 主配置文件
[root@centos02 ~]# vim /etc/redis/6379.conf
62 bind 192.168.100.20
85 port 6379
129 daemonize yes
482 requirepass pwd@123
483 masterauth pwd@123
484 slaveof 192.168.100.10 6379
2）启动 Redis 服务
[root@centos02 ~]# netstat -anptu | grep redis-server
tcp 0 0 192.168.100.20:6379 0.0.0.0:* LISTEN 4584/redis
server 1
tcp 0 0 192.168.100.20:33924 192.168.100.10:6379 ESTABLISHED
4584/redis-server 1
3、修改第二台从 Redis 服务器配置文件
1）修改第二台从 Redis 主配置文件
[root@centos02 ~]# vim /etc/redis/6379.conf
62 bind 192.168.100.30
85 port 6379
129 daemonize yes
482 requirepass pwd@123483 masterauth pwd@123
484 slaveof 192.168.100.10 6379
2）启动 Redis 服务
[root@centos03 ~]# /etc/init.d/redis_6379 start
Starting Redis server...
[root@centos03 ~]# netstat -anptu | grep redis-server
tcp 0 0 192.168.100.30:6379 0.0.0.0:* LISTEN 4624/redis
server 1
tcp 0 0 192.168.100.30:34356 192.168.100.10:6379 ESTABLISHED
4624/redis-server 1
4、查看配置主从复制
1）登录主 Redis 查看复制群集
[root@centos01 ~]# redis-cli -h 192.168.100.10 -a pwd@123 -p 6379
2）查看配置 Redis 复制只群集
192.168.100.10:6379> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.100.20,port=6379,state=online,offset=267,lag=0
slave1:ip=192.168.100.30,port=6379,state=online,offset=267,lag=1
master_repl_offset:267
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:266192.168.100.10:6379> quit
三、在 Centos04 上安装 Redis 配置 Redis 哨兵模式，监控主从 Redis 节点运
行状态，主 Redis 故障自动切换到新主 Redis 服务器
1、修改配置配置哨兵模式
1）修改 Redis 配置文件
[root@centos04 ~]# vim /usr/local/redis/sentinel.conf
16 bind 0.0.0.0
22 port 26379
70 sentinel monitor mymaster 192.168.100.10 6379 1
73 sentinel auth-pass mymaster pwd@123
100 sentinel down-after-milliseconds mymaster 30000
2）启动哨兵默认服务
[root@centos04 ~]# redis-sentinel /usr/local/redis/sentinel.conf &>
/var/log/redis_sentinel.log &
[1] 4697
3）查看哨兵模式运行状态
[root@centos04 ~]# netstat -anptu | grep redis-sentinel
tcp 0 0 0.0.0.0:26379 0.0.0.0:* LISTEN 4697/redis
sentinel
tcp 0 0 192.168.100.40:34325 192.168.100.30:6379 ESTABLISHED
4697/redis-sentinel
tcp 0 0 192.168.100.40:41415 192.168.100.30:6379 ESTABLISHED
4697/redis-sentinel tcp 0 0 192.168.100.40:51628 192.168.100.20:6379 ESTABLISHED
4697/redis-sentinel
tcp 0 0 192.168.100.40:59584 192.168.100.20:6379 ESTABLISHED
4697/redis-sentinel
tcp 0 0 192.168.100.40:40574 192.168.100.10:6379 ESTABLISHED
4697/redis-sentinel
tcp 0 0 192.168.100.40:45760 192.168.100.10:6379 ESTABLISHED
4697/redis-sentinel
2、模拟主 redis 数据库故障
1）停止主 Redis 服务
[root@centos01 ~]# redis-cli -h 192.168.100.10 -a pwd@123 -p 6379 shutdown
2）查看 redis-sentinel 监控
[root@centos04 ~]# tail -f /var/log/redis_sentinel.log
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
4697:X 15 Mar 05:22:36.314 # WARNING: The TCP backlog setting of 511 cannot be
enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
4697:X 15 Mar 05:22:36.314 # Sentinel ID is 54d4b56816bbd0a5f6316c90ecbd21b956b268d7
4697:X 15 Mar 05:22:36.314 # +monitor master mymaster 192.168.100.10 6379 quorum 14697:X 15 Mar 05:25:54.596 # +sdown master mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:54.596 # +odown master mymaster 192.168.100.10 6379 #quorum 1/1
4697:X 15 Mar 05:25:54.597 # +new-epoch 1
4697:X 15 Mar 05:25:54.597 # +try-failover master mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:54.598 # +vote-for-leader
54d4b56816bbd0a5f6316c90ecbd21b956b268d7 1
4697:X 15 Mar 05:25:54.598 # +elected-leader master mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:54.598 # +failover-state-select-slave master mymaster
192.168.100.10 6379
4697:X 15 Mar 05:25:54.659 # +selected-slave slave 192.168.100.20:6379
192.168.100.20 6379 @ mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:54.659 * +failover-state-send-slaveof-noone slave
192.168.100.20:6379 192.168.100.20 6379 @ mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:54.733 * +failover-state-wait-promotion slave
192.168.100.20:6379 192.168.100.20 6379 @ mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:54.810 # +promoted-slave slave 192.168.100.20:6379
192.168.100.20 6379 @ mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:54.810 # +failover-state-reconf-slaves master mymaster
192.168.100.10 6379
4697:X 15 Mar 05:25:54.884 * +slave-reconf-sent slave 192.168.100.30:6379
192.168.100.30 6379 @ mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:55.738 * +slave-reconf-inprog slave 192.168.100.30:6379
192.168.100.30 6379 @ mymaster 192.168.100.10 63794697:X 15 Mar 05:25:55.739 * +slave-reconf-done slave 192.168.100.30:6379
192.168.100.30 6379 @ mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:55.807 # +failover-end master mymaster 192.168.100.10 6379
4697:X 15 Mar 05:25:55.807 # +switch-master mymaster 192.168.100.10 6379
192.168.100.20 6379
4697:X 15 Mar 05:25:55.807 * +slave slave 192.168.100.30:6379 192.168.100.30 6379 @
mymaster 192.168.100.20 6379
4697:X 15 Mar 05:25:55.807 * +slave slave 192.168.100.10:6379 192.168.100.10 6379 @
mymaster 192.168.100.20 6379
4697:X 15 Mar 05:26:25.808 # +sdown slave 192.168.100.10:6379 192.168.100.10 6379 @
mymaster 192.168.100.20 6379
3）登录到备份节点查看状态
[root@centos02 ~]# redis-cli -h 192.168.100.20 -a pwd@123 -p 6379
192.168.100.20:6379> info replication
# Replication
role:master
connected_slaves:1
slave0:ip=192.168.100.30,port=6379,state=online,offset=11402,lag=0
master_repl_offset:11402
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:11401
192.168.100.20:6379>
3、模拟故障节点启动
1）启动故障节点的 redis
[root@centos01 ~]# netstat -anptu | grep redis-server
tcp 0 0 192.168.100.10:6379 0.0.0.0:* LISTEN 5051/redis
server 1
tcp 0 0 192.168.100.10:6379 192.168.100.40:38356 ESTABLISHED
5051/redis-server 1
tcp 0 0 192.168.100.10:6379 192.168.100.40:52097 ESTABLISHED
5051/redis-server 1
2）查看主从信息
[root@centos01 ~]# redis-cli -h 192.168.100.10 -a pwd@123 -p 6379
192.168.100.10:6379> info replication
# Replication
role:slave
master_host:192.168.100.20
master_port:6379
master_link_status:down
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_repl_offset:1
master_link_down_since_seconds:1678829565
slave_priority:100
slave_read_only:1
connected_slaves:0
master_repl_offset:0repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0
