keepalive配置

eepalived配置及典型应用案例

使用源码先安装keepalived 1.2.6

cd /usr/local/src

wget  http://www.keepalived.org/software/keepalived-1.2.6.tar.gz

tar zxf keepalived-1.2.6.tar.gz

cd keepalived-1.2.6

./configure --prefix=/usr/local/keepalived

make

make install

所设keepalived安装到/usr/local/keepalived, 则所有配置文件均位于此目录之下。 我一直没搞明白一个问题，Linux默认总是将程序安装到/usr/local目录下，所有程序共享了/usr/local/sbin目录。这对一些人的操作习惯是有影响的。为何不考虑使用每个软件一个独立的目录呢？

1.  建立服务启动脚本，以便使用service命令控制之 
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/keepalived

chmod +x /etc/init.d/keepalived

因为我们使用非默认路径（/usr/local）安装keepalived, 故需要修改几处路径，以保证keepalived能正常启动, 需要修改的文件如下：

2. 修改/etc/init.d/keepalived, 寻找大约15行左右的. /etc/sysconfig/keepalived, 修改为： 
.  /usr/local/keepalived/etc/sysconfig/keepalived, 即指向正确的文件位置

同时在上述行下添加以下内容（将keepavlied主程序所在路径导入到环境变量PATH中）：

PATH="$PATH:/usr/local/keepalived/sbin"

export PATH

3. 修改/usr/local/keepalived/etc/sysconfig/keepalived文件，设置正确的服务启动参数 
KEEPALIVED_OPTIONS="-D -f /usr/local/keepalived/etc/keepalived/keepalived.conf"

4. 经过以上修改，keepalived基本安装即可完成，启动测试之： 
service keepalived restart

5. 切勿忘记将此服务设置为开机启动

chkconfig keepalived on

默认的配置文件中，指定了两个数个虚拟IP : 192.168.200.16  192.168.200.17  192.168.200.18