1、环境：
rhel 6.0+ipvsadm-1.2.6+keepalived-1.2.5
2、安装

实现LVS/DR最重要的两个东西是ipvs内核模块和ipvsadm工具包，现在的系统已经包含ip_vs模块

1）检查内核模块，看一下ip_vs 是否被加载

lsmod |grep ip_vs

ip_vs 35009 0

如果没有显示，则说明没有加载，执行命令 modprobe ip_vs 就可以把ip_vs模块加载到内核

#modprobe ip_vs 然后再查看就有了。
2）安装ipvsadm

查看内核版本 #uname -r
2.6.32-71.el6.x86_64

先把目录/usr/src/kernels/2.6.32-71.el6.x86_64链接为/usr/src/linux，命令如下

ln –s /usr/src/2.6.32-71.el6.x86_64 /usr/src/linux

解压ipvsadm-1.24.tar.gz,执行"make;但是报错了，类似的错误信息大概如下

make -C libipvs
make[1]: Entering directory /usr/src/ipvsadm-1.26/libipvs'<br/>gcc -Wall -Wunused -Wstrict-prototypes -g -fPIC -DLIBIPVS_USE_NL -DHAVE_NET_IP_VS_H -c -o libipvs.o libipvs.c<br/>In file included from libipvs.h:13,<br/>from libipvs.c:23:<br/>ip_vs.h:15:29: error: netlink/netlink.h: No such file or directory<br/>ip_vs.h:16:31: error: netlink/genl/genl.h: No such file or directory<br/>ip_vs.h:17:31: error: netlink/genl/ctrl.h: No such file or directory<br/>In file included from libipvs.h:13,<br/>from libipvs.c:23:<br/>ip_vs.h:520: error: array type has incomplete element type<br/>ip_vs.h:521: error: array type has incomplete element type<br/>libipvs.c:57: warning: implicit declaration of function ‘nlmsg_alloc’<br/>libipvs.c:57: warning: assignment makes pointer from integer without a cast<br/>libipvs.c:61: warning: implicit declaration of function ‘genlmsg_put’<br/>libipvs.c:61: error: ‘NL_AUTO_PID’ undeclared (first use in this function)<br/>libipvs.c:61: error: (Each undeclared identifier is reported only once<br/>libipvs.c: In function ‘ipvs_add_service’:<br/>libipvs.c:255: error: too many arguments to function ‘ipvs_nl_send_message’<br/>libipvs.c: In function ‘ipvs_update_service’:<br/>libipvs.c:276: error: too many arguments to function ‘ipvs_nl_send_message’<br/>libipvs.c: In function ‘ipvs_del_service’:<br/>libipvs.c:296: error: too many arguments to function ‘ipvs_nl_send_message’<br/>libipvs.c: In function ‘ipvs_zero_service’:<br/>libipvs.c:473: warning: assignment makes pointer from integer without a cast<br/>libipvs.c:483: error: too many arguments to function ‘ipvs_nl_send_message’<br/>libipvs.c: In function ‘ipvs_stop_daemon’:<br/>libipvs.c:504: warning: assignment makes pointer from integer without a cast<br/>libipvs.c:514: error: too many arguments to function ‘ipvs_nl_send_message’<br/>libipvs.c: At top level:<br/>libipvs.c:1051: error: ‘NL_OK’ undeclared (first use in this function)<br/>libipvs.c: In function ‘ipvs_get_daemon’:<br/>libipvs.c:1071: error: ‘NLM_F_DUMP’ undeclared (first use in this function)<br/>libipvs.c:1072: error: too many arguments to function ‘ipvs_nl_send_message’<br/>make[1]: *** [libipvs.o] Error 1<br/>make[1]: Leaving directory/usr/src/ipvsadm-1.26/libipvs'
make: *** [libs] Error 2

解决：yum install libnl libpopt

再次make，还是有报错
类似如 /usr/src/ipvsadm-1.26/ipvsadm.c:667: undefined reference to poptStrerror'<br/>/usr/src/ipvsadm-1.26/ipvsadm.c:667: undefined reference topoptBadOption'
/usr/src/ipvsadm-1.26/ipvsadm.c:670: undefined reference to poptFreeContext'<br/>/usr/src/ipvsadm-1.26/ipvsadm.c:677: undefined reference topoptGetArg'
/usr/src/ipvsadm-1.26/ipvsadm.c:678: undefined reference to poptGetArg'<br/>/usr/src/ipvsadm-1.26/ipvsadm.c:679: undefined reference topoptGetArg'
/usr/src/ipvsadm-1.26/ipvsadm.c:690: undefined reference to poptGetArg'<br/>/usr/src/ipvsadm-1.26/ipvsadm.c:693: undefined reference topoptFreeContext'
collect2: ld returned 1 exit status
make: *** [ipvsadm] Error 1

解决：yum install popt-static （ftp://ftp.muug.mb.ca/mirror/centos/6.3/os/x86_64/packages/popt-static-1.13-7.el6.x86_64.rpm）
再次make通过，然后make instll 完成安装

3）安装keepalived

keepalived下载
http://www.keepalived.org/software/keepalived-1.2.5.tar.gz

解压 & ./configure & make & make install 完成安装。