redis+Keepalived实现Redis主从复制

redis+Keepalived实现Redis主从复制：

环境：CentOs6.5
Master: 192.168.1.203
Slave:   192.168.1.204
Virtural IP Address (VIP): 192.168.1.205

所需软件：
keepalived-1.2.12.tar.gz
redis-2.8.7.tar.gz

实现功能：
当 Master 与 Slave 均运作正常时, Master负责服务，Slave负责Standby；
当 Master 挂掉，Slave 正常时, Slave接管服务，同时关闭主从复制功能；

一、安装配置前准备工作:

 yum -y install gcc gcc+ gcc-c++ openssl openssl-devel pcre pcre-devel

Redis属于内存数据库，所以调优都集中到了内存上,需要将 vm.overcommit 设置为1
echo "vm.overcommit_memory=1" >> /etc/sysctl
sysctl -p

1.在主服务器192.168.1.203上面做下面操作
echo " 192.168.1.203 gc-xxooredis1" >> /etc/hosts
echo " 192.168.1.204 gc-xxooredis2" >> /etc/hosts
2.在从服务器192.168.1.204上面做下面操作
echo " 192.168.1.203 gc-xxooredis1" >> /etc/hosts
echo " 192.168.1.204 gc-xxooredis2" >> /etc/hosts

二、在Master和Slave上安装redis:

tar -zxvf redis-2.8.7.tar.gz
cd redis-2.8.7
make && make install
cd src
mkdir -p /usr/local/redis/bin
cp redis-server redis-cli redis-benchmark redis-check-aof redis-check-dump /usr/local/redis/bin/

mkdir -p /usr/local/redis/etc

将源码中的 redis.conf 复制到 /usr/local/redis/etc/
redis-2.8.7]# cp redis.conf /usr/local/redis/etc/

修改 /usr/local/redis/etc/redis.conf里面可以把 daemonize no 修改为daemonize yes

制作一个redis  init.d 的启动脚本：

 1 #!/bin/bash
 2 #
 3 # redis - this script starts and stops the redis-server daemon
 4 #
 5 # chkconfig:  - 80 12
 6 # description: Redis is a persistent key-value database
 7 # processname: redis-server
 8 # config:   /usr/local/redis/etc/redis.conf
 9 # pidfile:   /usr/local/redis/var/redis.pid
10  
11 source /etc/init.d/functions
12  
13 BIN="/usr/local/redis/bin"
14 CONFIG="/usr/local/redis/etc/redis.conf"
15 PIDFILE="/usr/local/redis/var/redis.pid"
16  
17  
18 ### Read configuration
19 [ -r "$SYSCONFIG" ] && source "$SYSCONFIG"
20  
21 RETVAL=0
22 prog="redis-server"
23 desc="Redis Server"
24  
25 start() {
26  
27     if [ -e $PIDFILE ];then
28        echo "$desc already running...."
29        exit 1
30     fi
31  
32     echo -n $"Starting $desc: "
33     daemon $BIN/$prog $CONFIG
34  
35     RETVAL=$?
36     echo
37     [ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog
38     return $RETVAL
39 }
40  
41 stop() {
42     echo -n $"Stop $desc: "
43     killproc $prog
44     RETVAL=$?
45     echo
46     [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$prog $PIDFILE
47     return $RETVAL
48 }
49  
50 restart() {
51   stop
52   start
53 }
54  
55 case "$1" in
56  start)
57     start
58     ;;
59  stop)
60     stop
61     ;;
62  restart)
63     restart
64     ;;
65  condrestart)
66     [ -e /var/lock/subsys/$prog ] && restart
67     RETVAL=$?
68     ;;
69  status)
70     status $prog
71     RETVAL=$?
72     ;;
73   *)
74     echo $"Usage: $0 {start|stop|restart|condrestart|status}"
75     RETVAL=1
76 esac
77  
78 exit $RETVAL

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