redis一主二从+三哨兵配置

场景：一台服务上搭建redis主从复制

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前提：服务器上的redis是通过宝塔安装的，安装路径为/www/server/redis/

1. cd /www/server/redis && cp redis.conf redis_6380.conf  
2. vim redis_6380.conf 更改以下几项：  
pidfile /var/run/redis_6380.pid  
port 6380  
dbfilename dump_6380.rdb  
3. cd /www/server/redis && cp start.pl start_6380.pl  
4. 设置启动脚本 cd /etc/init.d && cp redis redis-6380  
5. vim redis-6380 内容如下：

#!/bin/sh
# chkconfig: 2345 56 26
# description: Redis Service
# Provides:          Redis
# Required-Start:    $all
# Required-Stop:     $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts Redis
# Description:       starts the BT-Web
# Simple Redis init.d script conceived to work on Linux systems
# as it does use of the /proc filesystem.

CONF="/www/server/redis/redis_6380.conf"
REDIS_PORT=$(cat $CONF |grep port|grep -v '#'|awk '{print $2}')
if [ "$REDIS_PASS" != "" ];then
        REDIS_PASS=" -a $REDIS_PASS"
fi
if [ -f "/www/server/redis/start_6380.pl" ];then
        STAR_PORT=$(cat /www/server/redis/start_6380.pl)
else
        STAR_PORT="6380"
fi
EXEC=/www/server/redis/src/redis-server
PIDFILE=/var/run/redis_6380.pid

redis_start(){
        echo "Starting Redis server..."
        nohup sudo -u redis $EXEC $CONF >> /www/server/redis/logs.pl 2>&1 &
        echo ${REDIS_PORT} > /www/server/redis/start_6380.pl
        sleep 1.5
        if [ "${REDIS_PID}" ]; then
                echo "${REDIS_PID}" > ${PIDFILE}
        fi
}
redis_status(){
        if [ "${REDIS_PID}" ]; then
                echo "redis is running..."
        else
                echo "redis is stopped..."
        fi
}
redis_stop(){
        if [ "${REDIS_PID}" ]; then
                echo "${REDIS_PID}" > ${PIDFILE}
        fi
}
redis_status(){
        REDIS_PID=$(ps -ef|grep redis-server|grep -v "grep"|grep -v "root"|awk '{print $2}')
        if [ "${REDIS_PID}" ]; then
                echo "redis is running..."
        else
                echo "redis is stopped..."
        fi
}
redis_stop(){
        echo "Stopping ..."
        $CLIEXEC shutdown
        sleep 1
        pkill -9 redis-server
        rm -f ${PIDFILE}
        echo "Redis stopped"
}

case "$1" in
        start)
                redis_start
                ;;
        stop)
                redis_stop
                ;;
        status)
                redis_status
                ;;
        restart|reload)
                redis_stop
                sleep 0.3
                redis_start
                ;;
        *)
                echo "Please use start or stop as first argument"
                ;;
esac

6. 执行 service redis-6380 start 启动另一个redis实例
7. 配置主服务器中的redis.conf文件，在redis.conf中添加以下几项：

(1) 将bind 127.0.0.1 注释或改为bind 0.0.0.0  
(2) 开启守护进程 daemonize yes  
(3) 设置访问密码 requirepass password  
(4) 内存策略 maxmemory-policy volatile-lru/allkeys-lru

8. 配置从服务中的redis.conf文件，在redis_6380.conf中添加以下几项：

(1) slaveof 192.168.5.22 6379  
(2) masterauth password  
(3) slave-read-only yes

9. 重复上面的步骤再搭建一个端口为6381的redis实例
10. 哨兵sentinel.conf文件配置，需要更改以下几项(默认使用redis自带的sentinel.conf)：

(1)port 26379 //要跟redis实例的端口区分开  
(2)sentinel monitor mymaster 127.0.0.1 6379 2 //master的ip和端口

11. 启动哨兵（正确的启动顺序：主-->从-->哨兵）

cd /www/server/redis/ && ./src/redis-sentinel sentinel.conf

12. 启动之后进行测试，将redis主服务器下线，看哨兵能否进行故障转移即可