使用sentinel搭建集群
实验拓扑图
1.1在mysql1上安装redis服务
[root@mysql1 ~]# bash redis-install.sh
1.2配置文件中的与RDB相关的参数
创建数据存放目录
[root@mysql1 ~]# mkdir -p /redis/data/
[root@mysql1 ~]# vim /usr/local/redis/etc/redis6379.conf
398 stop-writes-on-bgsave-error yes
404 rdbcompression yes
413 rdbchecksum yes
431 dbfilename dump.rdb
454 dir /redis/data
[root@mysql1 ~]# systemctl restart redis6379.service #重启服务
[root@mysql1 ~]# redis-cli -a 123123 -p 6379 -h 192.168.0.88
192.168.0.88:6379> config get dir #查看数据存放目录是否创建成功
1) "dir"
2) "/redis/data" #设置成功
1.3配置文件中的与AOF相关的参数
[root@mysql1 ~]# vim /usr/local/redis/etc/redis6379.conf
1252 appendonly no
1256 appendfilename "appendonly.aof"
1281 appendfsync always
1282 appendfsync everysec
1283 appendfsync no
1304 no-appendfsync-on-rewrite no
1323 auto-aof-rewrite-percentage 100
1324auto-aof-rewrite-min-size 64mb
[root@mysql1 ~]# systemctl restart redis6379.service
1.4在mysql1上插入数据测试
[root@mysql1 ~]# redis-cli -a 123123 -p 6379 -h 192.168.0.88
192.168.0.88:6379> set aa 123
OK
192.168.0.88:6379> set bb 456
OK
192.168.0.88:6379> get aa
"123"
192.168.0.88:6379> get bb
"456"
1.5部署sentinel
1.5.1修改配置文件
[root@mysql1 ~]# cp /usr/local/src/redis-6.2.6/sentinel.conf
/usr/local/redis/etc/
[root@mysql1 ~]# vim /usr/local/redis/etc/sentinel.conf
27 daemonize yes
16 bind 0.0.0.0
37 logfile "/var/log/redis/sentinel_26379.log"
85 sentinel monitor mymaster 192.168.0.88 6379 2
87 sentinel auth-pass mymaster 123123
126 sentinel down-after-milliseconds mymaster 30000
201 sentinel parallel-syncs mymaster 1
226 sentinel failover-timeout mymaster 180000
[root@mysql1 ~]# scp /usr/local/redis/etc/sentinel.conf
192.168.0.99:/usr/local/redis/etc/
[root@mysql1 ~]# scp /usr/local/redis/etc/sentinel.conf
192.168.0.111:/usr/local/redis/etc/
1.5.2启动sentinel
1.5.2.1方式1：
[root@mysql1 ~]# redis-sentinel /usr/local/redis/etc/sentinel.conf
[root@mysql1 ~]# echo "redis-sentinel
/usr/local/redis/etc/sentinel.conf" >> /etc/rc.d/rc.local
[root@mysql1 ~]# source /etc/rc.d/rc.local
[root@mysql1 ~]# ps -ef | grep sentinel
[root@mysql1 ~]# pkill redis-sentinel
1.5.2.2方式2：使用systemctl命令控制sentinel
[root@mysql1 ~]# vim /etc/systemd/system/sentinel.service
[Unit]
Description=sentinel
After=network.target
[Service]
Type=forking
ExecStart=/usr/local/redis/bin/redis-sentinel
/usr/local/redis/etc/sentinel.conf
ExecReload=/usr/local/redis/bin/redis-sentinel -s reload
ExecStop=/usr/local/redis/bin/redis-sentinel -s stop
PrivateTmp=true
[Install]
WantedBy=multi-user.target
[root@mysql1 system]# scp sentinel.service
192.168.0.99:/etc/systemd/system
[root@mysql1 system]# scp sentinel.service 192.168.0.111:/etc/systemd/system
[root@mysql1 ~]# systemctl start sentinel.service
[root@mysql1 ~]# ps -ef | grep sentinel
1.5登录sentinel，检查整个集群的状态
[root@mysql1 ~]# redis-cli -p 26379 -h 192.168.0.88
192.168.0.88:26379> info sentinel
192.168.0.88:26379> client list #客户端列表
1.6关闭master，查看主从状态
[root@mysql1 ~]# systemctl stop redis6379.service
[root@mysql1 ~]# redis-cli -p 26379 -h 192.168.0.88
192.168.0.88:26379> info sentinel
192.168.0.88:26379> sentinel masters
1) "name"
2) "mymaster"
3) "ip"
4) "192.168.0.99"
5) "port"
6) "6379"
1.7重启主服务器，查看主从状态
[root@mysql1 ~]# systemctl restart redis6379.service
[root@mysql1 ~]# redis-cli -a 123123 -p 6379 -h 192.168.0.88
192.168.0.88:26379> info replication
# Replication
role:slave
master_host:192.168.0.99
master_port:6379
master_link_status:down #显示down
[root@mysql1 ~]# sed -i '/# masterauth/a masterauth 123123'
/usr/local/redis/etc/redis6379.conf
[root@mysql1 ~]# systemctl restart redis6379.service
[root@mysql1 ~]# redis-cli -a 123123 -p 6379 -h 192.168.0.88
192.168.0.88:6379> info replication
# Replication
role:slave
master_host:192.168.0.99
master_port:6379
master_link_status:up #显示up
2.1在mysql2上安装redis服务
[root@mysql2 ~]# bash redis-install.sh
2.2配置slave的主
[root@mysql2 ~]# sed -i '/# replicaof/c replicaof 192.168.0.88 6379' /usr/local/redis/etc/redis6379.conf #指定master IP，端口
[root@mysql2 ~]# sed -i '/# masterauth/a masterauth 123123' /usr/local/redis/etc/redis6379.conf #指定主redis连接认证密码
[root@mysql2 ~]# systemctl restart redis6379.service #重启服务
2.3在mysql2上查看主信息
192.168.0.99:6379> info replication
2.4在mysql2上查看同步信息
[root@mysql2 ~]# redis-cli -a 123123 -p 6379 -h 192.168.0.99
192.168.0.99:6379> keys *
1) "aa"
2) "bb"
192.168.0.99:6379> get aa
"123"
192.168.0.99:6379> get bb
"456"
2.5启动sentinel服务
[root@mysql2 ~]# systemctl start sentinel.service
[root@mysql2 ~]# systemctl enable sentinel.service
[root@mysql2 ~]# systemctl status sentinel.service
2.6在新的master上查看主从状态
[root@mysql2 ~]# redis-cli -a 123123 -p 6379 -h 192.168.0.99
3.1在mysql3上安装redis服务
[root@mysql3 ~]# bash redis-install.sh
3.2配置slave的主
[root@mysql3 ~]# sed -i '/# replicaof/c replicaof 192.168.0.88 6379' /usr/local/redis/etc/redis6379.conf #指定master IP，端口
[root@mysql2 ~]# sed -i '/# masterauth/a masterauth 123123' /usr/local/redis/etc/redis6379.conf #指定主redis连接认证密码
[root@mysql3 ~]# systemctl restart redis6379.service #重启服务
3.3在mysql3上查看主信息
192.168.0.111:6379> info replication
3.4在mysql3上查看同步信息
[root@mysql3 ~]# redis-cli -a 123123 -p 6379 -h 192.168.0.111
192.168.0.111:6379> keys *
1) "bb"
2) "aa"
192.168.0.111:6379> get aa
"123"
192.168.0.111:6379> get bb
"456"
3.5启动sentinel服务
[root@mysql2 ~]# systemctl start sentinel.service
[root@mysql2 ~]# systemctl enable sentinel.service
[root@mysql3 ~]# systemctl status sentinel.service
