redis搭建哨兵集群的实现步骤

// 三台主机都要做
[root@master opt] wget https://download.redis.io/releases/redis-6.2.6.tar.gz

//三台主机都做
[root@master opt]# tar -zxf redis-6.2.6.tar.gz 

//编译安装
[root@master redis-6.2.6]# pwd  //进入redis目录
/opt/redis-6.2.6

[root@master redis-6.2.6]# yum -y install gcc gcc-c++  //安装c语言编译器
[root@master redis-6.2.6]# yum -y install make  //安装make编译器

[root@master redis-6.2.6]# make MALLOC=libc  

// redis的二进制文件放在src目录下
[root@master redis-6.2.6]# cat /etc/profile.d/redis.sh   //为了能直接使用redis命令
export PATH=/opt/redis-6.2.6/src:$PATH

[root@master redis-6.2.6]# source /etc/profile.d/redis.sh  //使其生效

//启动redis
启动方式有以下两种：
[root@master redis-6.2.6]# vim redis.conf
257 daemonize yes //把no改为yes

启动一：
[root@master src]# ./redis-server  //不建议用这种方式启动
[root@master redis-6.2.6]# redis-server /opt/redis-6.2.6/redis.conf  //推荐使用这种方式

启动二：
[root@master opt]# cat /usr/lib/systemd/system/redis.service 
[Unit]
Description=redis server daemon
After=network.target

[Service]
Type=forking
ExecStart=/opt/redis-6.2.6/src/redis-server /opt/redis-6.2.6/redis.conf
ExecStop=/bin/kill -s QUIT $MAINPID
ExecReload=/bin/kill -HUP $MAINPID

[Install]
WantedBy=multi-user.target

[root@master opt]# systemctl daemon-reload
[root@master opt]# systemctl enable --now redis.service

[root@master opt]# ss -anlt | awk -F "  *|:" 'NR==2{print $5}'   //看到6379端口号说明成功
6379

进入客户端的命令
redis-cli -p 6379 
127.0.0.1:6379>

[root@master redis-6.2.6]# redis-cli -p 6379 shutdown  //关闭redis服务

//在master要做的事
[root@master redis-6.2.6]# mkdir logs
75 bind 192.168.129.136  //本机IP地址
94 protected-mode no  
302 logfile "/opt/redis-6.2.6/logs/redis.log"

//在slave2上要做的事
[root@slave2 redis-6.2.6]# vim redis.conf
75 bind 192.168.129.135  //本机IP
477   replicaof 192.168.129.136 6379  master的IP和端口号

//在slave2上要做的事
[root@slave2 redis-6.2.6]# vim redis.conf
75 bind 192.168.129.135  //本机IP
477   replicaof 192.168.129.136 6379  master的IP和端口号

[root@master redis-6.2.6]# redis-cli -h 192.168.129.136 -p 6379
192.168.129.136:6379> set name tom  // 设置一个value值
OK

[root@slave ~]# redis-cli -h 192.168.129.135  //这里也可以不指定端口号，因为redis默认使用的事6379端口号
192.168.129.135:6379> get name
"tom"

[root@slave2 redis-6.2.6]# redis-cli -h 192.168.129.134
192.168.129.134:6379> get name
"tom"

###主从同步成功

// 三台主机做同样的操作
[root@master redis-6.2.6]# vim sentinel.conf
26 daemonize yes
36 logfile "/opt/redis-6.2.6/logs/sentinel.conf"
84 sentinel monitor mymaster 192.168.129.136 6379 2

[root@master ~]# redis-sentinel /opt/redis-6.2.6/sentinel.conf //启动哨兵

// 查看哨兵信息
[root@master ~]# redis-cli -h 192.168.129.136 -p 26379
192.168.129.136:26379> info sentinel
# Sentinel
sentinel_masters:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
sentinel_simulate_failure_flags:0
master0:name=mymaster,status=ok,address=192.168.129.136:6379,slaves=2,sentinels=3

[root@slave ~]# redis-cli -h 192.168.129.135 -p 26379
192.168.129.135:26379> info sentinel
# Sentinel
sentinel_masters:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
sentinel_simulate_failure_flags:0
master0:name=mymaster,status=ok,address=192.168.129.136:6379,slaves=2,sentinels=3


[root@slave2 ~]# redis-cli -h 192.168.129.134 -p 26379
192.168.129.134:26379> info sentinel
# Sentinel
sentinel_masters:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
sentinel_simulate_failure_flags:0
master0:name=mymaster,status=ok,address=192.168.129.136:6379,slaves=2,sentinels=3

[root@master ~]# systemctl stop redis.service  //关闭redis服务
[root@master redis-6.2.6]# ps -ef | grep redis  //使用此命令找到sentinel进程，然后再kill掉sentinel的进程

//因为主机切换到了144主机，因此原来主机的配置文件也会随之更改，所以在137启动前需要更改配置文件，将其配置成144的从机：
[root@master redis-6.2.6]# vim redis.conf
477   replicaof 192.168.129.134 6379

[root@master redis-6.2.6]# redis-server /opt/redis-6.2.6/redis.conf //启动redis服务
[root@master redis-6.2.6]# systemctl restart redis.service  //也可以使用此命令启动redis服务

[root@master redis-6.2.6]# redis-sentinel /opt/redis-6.2.6/sentinel.conf  //启动sentinel服务

##至此哨兵集群搭建完毕