Redis sentinel哨兵集群的实现步骤_Redis_

[root@Centos7 ~]# hostnamectl set-hostname master [root@Centos7 ~]# su [root@master ~]# systemctl stop firewalld [root@master ~]# setenforce 0 setenforce: SELinux is disabled [root@master ~]# mount /dev/cdrom /mnt/ mount: /dev/sr0 写保护，将以只读方式挂载 mount: /dev/sr0 已经挂载或 /mnt 忙 /dev/sr0 已经挂载到 /mnt 上 [root@master ~]# ll 总用量 1928 -rw-------. 1 root root 1264 1月 12 18:27 anaconda-ks.cfg -rw-r--r-- 1 root root 1966337 6月 9 01:16 redis-5.0.4.tar.gz [root@master ~]# tar xf redis-5.0.4.tar.gz [root@master ~]# cd redis-5.0.4 [root@master redis-5.0.4]# make [root@master redis-5.0.4]# mkdir -p /usr/local/redis [root@master redis-5.0.4]# cp /root/redis-5.0.4/src/redis-server /usr/local/redis/ [root@master redis-5.0.4]# cp /root/redis-5.0.4/src/redis-cli /usr/local/redis/ [root@master redis-5.0.4]# cp /root/redis-5.0.4/redis.conf /usr/local/redis/ [root@master redis-5.0.4]# vim /usr/local/redis/redis.conf #修改 。。。。。。 68 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 69 bind 192.168.100.202 #修改为本机地址，如果为127.0.0.1就只能本机访问 70 。。。。。。 87 # are explicitly listed using the "bind" directive. 88 protected-mode no #关闭redis的保护模式，如果为yes的话其他客户端就无法连接到此服务器 89 。。。。。。 135 # Note that Redis will write a pid file in /var/run/redis.pid when daemonized. 136 daemonize yes #开启redis的后台守护程序，即在redis开启之后是放在后台运行的 137 。。。。。。 262 # Note that you must specify a directory here, not a file name. 263 dir /usr/local/redis/rdb 264 。。。。。。 506 # 507 requirepass 123123 #去掉注释，修改redis的密码为123123 508 #保存退出 [root@slave2 redis-5.0.4]# mkdir /usr/local/redis/rdb [root@master redis-5.0.4]# vim /etc/init.d/redis #!/bin/sh # chkconfig: 2345 80 90 # description: Start and Stop redis #PATH=/usr/local/bin:/sbin:/usr/bin:/bin REDISPORT=6379 EXEC=/usr/local/redis/redis-server REDIS_CLI=/usr/local/redis/redis-cli PIDFILE=/var/run/redis_6379.pid CONF="/usr/local/redis/redis.conf" AUTH="123123" LISTEN_IP=$(netstat -utpln |grep redis-server |awk '{print $4}'|awk -F':' '{print $1}') case "$1" in start) if [ -f $PIDFILE ] then echo "$PIDFILE exists, process is already running or crashed" else echo "Starting Redis server..." $EXEC $CONF fi if [ "$?"="0" ] then echo "Redis is running..." fi ;; stop) if [ ! -f $PIDFILE ] then echo "$PIDFILE does not exist, process is not running" else PID=$(cat $PIDFILE) echo "Stopping ..." $REDIS_CLI -h $LISTEN_IP -p $REDISPORT -a $AUTH SHUTDOWN while [ -x ${PIDFILE} ] do echo "Waiting for Redis to shutdown ..." sleep 1 done echo "Redis stopped" fi ;; restart|force-reload) ${0} stop ${0} start ;; *) echo "Usage: /etc/init.d/redis {start|stop|restart|force-reload}" >&2 exit 1 esac [root@master redis-5.0.4]# chkconfig --add redis [root@master redis-5.0.4]# chmod 755 /etc/init.d/redis [root@master redis-5.0.4]# ln -s /usr/local/redis/* /usr/local/bin/ [root@master redis-5.0.4]# /etc/init.d/redis start Starting Redis server... 5233:C 09 Jun 2021 01:25:53.069 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo 5233:C 09 Jun 2021 01:25:53.069 # Redis version=5.0.4, bits=64, commit=00000000, modified=0, pid=5233, just started 5233:C 09 Jun 2021 01:25:53.069 # Configuration loaded Redis is running... [root@master redis-5.0.4]# netstat -anpt | grep 6379 tcp 0 0 192.168.100.202:6379 0.0.0.0:* LISTEN 5234/redis-server 1 

******（1）Master配置 [root@master redis-5.0.4]# vim /usr/local/redis/redis.conf #修改 。。。。。。 292 # 293 masterauth 123123 #配置主服务器密码，哨兵有一个问题，就是当主服务器坏掉，切换到从服务器时，原来的主服务器可以正常运行之后，再次加入集群是加不进去的，因为哨兵没有配置主服务器的密码，所以无法连接，所以在使用哨兵集群时，要把每台的主服务器密码都配置上，每台redis的密码最好都一样 294 。。。。。。 456 # 457 min-replicas-to-write 1 #设置slave服务器的数量，当slave服务器少于这个数量时，Master主服务器会停止接收客户端的一切写请求 458 min-replicas-max-lag 10 #设置主服务器和从服务器之间同步数据的超时时间，当超过此时间时，master主服务器会停止客户端的一切写操作，单位为秒 459 # 。。。。。。 [root@master redis-5.0.4]# /etc/init.d/redis restart #重启redis Stopping ... Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. Redis stopped Starting Redis server... 5291:C 09 Jun 2021 02:04:39.132 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo 5291:C 09 Jun 2021 02:04:39.132 # Redis version=5.0.4, bits=64, commit=00000000, modified=0, pid=5291, just started 5291:C 09 Jun 2021 02:04:39.132 # Configuration loaded Redis is running... ******（2）Slave1配置 [root@slave1 redis-5.0.4]# vim /usr/local/redis/redis.conf 。。。。。。 285 # 286 replicaof 192.168.100.202 6379 #在从服务器上指定主服务器的ip和端口 287 。。。。。。 292 # 293 masterauth 123123 #指定主服务器上redis的密码 294 。。。。。。 #保存退出 [root@slave redis-5.0.4]# /etc/init.d/redis restart #重启服务 Stopping ... Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. Redis stopped Starting Redis server... 5304:C 09 Jun 2021 02:11:32.241 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo 5304:C 09 Jun 2021 02:11:32.241 # Redis version=5.0.4, bits=64, commit=00000000, modified=0, pid=5304, just started 5304:C 09 Jun 2021 02:11:32.241 # Configuration loaded Redis is running... ******（3）Slave2配置 [root@slave2 redis-5.0.4]# vim /usr/local/redis/redis.conf 。。。。。。 286 replicaof 192.168.100.204 6379 287 288 # If the master is password protected (using the "requirepass" configuration 289 # directive below) it is possible to tell the replica to authenticate before 290 # starting the replication synchronization process, otherwise the master will 291 # refuse the replica request. 292 # 293 masterauth 123123 294 。。。。。。 #保存退出 [root@slave2 redis-5.0.4]# /etc/init.d/redis restart Stopping ... Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. Redis stopped Starting Redis server... 5253:C 09 Jun 2021 17:50:25.680 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo 5253:C 09 Jun 2021 17:50:25.680 # Redis version=5.0.4, bits=64, commit=00000000, modified=0, pid=5253, just started 5253:C 09 Jun 2021 17:50:25.680 # Configuration loaded Redis is running... ******（3）验证主从是否成功 [root@master ~]# redis-cli -h 192.168.100.202 -a 123123 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.100.202:6379> set aaa bbb OK 192.168.100.202:6379> set bbb ccc OK 192.168.100.202:6379> keys * 1) "aaa" 2) "bbb" [root@slave1 ~]# redis-cli -h 192.168.100.203 -a 123123 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.100.203:6379> keys * 1) "bbb" 2) "aaa" 192.168.100.203:6379> set ttt fff (error) READONLY You can't write against a read only replica. #从服务器无法写入数据 [root@slave2 redis-5.0.4]# redis-cli -h 192.168.100.204 -a 123123 Warning: Using a password with '-a' or '-u' option on the command line interfa
                
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