Redis+sentinel 高可用实践

1、环境规划

1. 10.213.50.138（主） redis+sentinel
2. 10.213.50.168（从） redis+sentinel
3. 10.213.50.227  作为客户端测试插入数


2、redis部署

wget http://download.redis.io/releases/redis-3.2.9.tar.gz
tar zxvf redis-3.2.9.tar.gz
cd redis-3.2.9
make && make install

cd utils/

./install_server.sh  #初始化脚本

3、redis配置（master）

bind 0.0.0.0
protected-mode yes
port 6379
daemonize yes
pidfile "/var/run/redis_6379.pid"
logfile "/var/log/redis_6379.log"

redis从配置
bind 0.0.0.0
protected-mode yes
port 6379
daemonize yes
pidfile "/var/run/redis_6379.pid"
logfile "/var/log/redis_6379.log"
slaveof  10.213.50.138  6379   #从redis比主redis多这一行

启动redis并检查info replication  是否正常
redis-server /etc/redis/6379.conf  在从redis上面观察

4、配置redis-sentinel

protected-mode no
daemonize yes
port 26379
logfile "/var/log/redis/sentinel.log"
pidfile "/var/run/sentinel.pid"
sentinel monitor mymaster 10.213.50.138 6379 1
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 15000
sentinel client-reconfig-script mymaster /etc/notify_mymaster.sh
启动redis-sentinel  并检查状态
redis-sentinel /etc/sentinel.conf

5、vip漂移脚本，需要执行权限

cat /etc/notify_mymaster.sh #!/bin/bash
MASTER_IP=$6
LOCAL_IP=‘10.213.50.168‘
VIP=‘10.213.50.188‘
NETMASK=‘24‘
INTERFACE=‘eth0‘
if [ ${MASTER_IP} = ${LOCAL_IP} ]; then
        /sbin/ip addr add ${VIP}/${NETMASK} dev ${INTERFACE}
        /sbin/arping -q -c 3 -A ${VIP} -I ${INTERFACE}
       exit 0
else
        /sbin/ip addr del ${VIP}/${NETMASK} dev ${INTERFACE}
       exit 0
fi
exit 1

6、客户端测试数据

cat redis.sh
#!/bin/bash
for ((i=0;i<20000;i++))
do
echo -en "helloworld" | redis-cli -h 10.213.50.188 -x set name$i >>redis.log
sleep 1
done

7、绑定vip到主库

/sbin/ip addr add 10.213.50.188/24 dev eth0

8、停止主redis观察从库

从库变成了主库，并且vip地址漂移过来了

客户端插入数据会中断，中断时间就是redis  vip漂移及redis从库提升到主库的时间

原文地址：https://www.cnblogs.com/hellojackyleon/p/8818318.html