高可用keepalived + lvs
调度主机：192.168.0.85；192.168.0.52realserver:192.168.0.96;192.168.0.66
192.168.0.52:
到http://www.keepalived.org/download.html下载源码keepalived，我用的是keepalived-1.2.5.tar.gz
# yum install kernel-devel openssl-devel libnl-devel popt-devel gcc make
如果不装kernel-devel可以编译成功，但安装后只有调度，没有lvs支持，因为他是调用内核的lvs，编译需要kernel-devel
解压，编译，如果要用snmp和debug也可已先安装再编译
configure后，可以看到Extra Lib:-lpot -lssl -lcrypto -lnl
默认安装目录为/usr/local/etc下，我们需要把相应文件靠到系统目录下（也可已在安装的时候指定安装目录为/etc）
# pwd
/usr/local/etc
# cp rc.d/init.d/keepalived /etc/init.d/
# cp sysconfig/keepalived
keepalived/ rc.d/ sysconfig/
# cp sysconfig/keepalived /etc/sysconfig/
# ln -s /usr/local/sbin/keepalived /usr/sbin/
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