Ubuntu上ipvsadm+keepalivedhttp://www.keepalived.org/software/keepalived-1.1.19.tar.gzMASTER服务器keepalived部分：$ sudo apt-get install libpopt-dev$ sudo apt-get install daemon$ sudo tar zxfv keepalived-1.1.19.tar.gz$ cd keepalived-1.1.19$ ./configure --prefix=/usr/local/keepalived$ make$ sudo make install$ sudo mkdir /etc/sysconfig$ sudo cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/$ sudo cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/$ sudo cp /usr/local/keepalived/sbin/keepalived /sbin/$ sudo mkdir /etc/keepalived$ sudo cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/$ sudo vi /etc/keepalived/keepalived.conf按a或i进入编辑模式! Configuration File for keepalivedglobal_defs { notification_email {yang@126.com (当IP发生迁移等事件的时候发送邮件到指定邮箱) } notification_email_from root@localhost (邮件发送方) smtp_server 127.0.0.1 (邮件外发服务器地址) smtp_connect_timeout 30 (邮件超时时间为30秒) router_id LVS_DEVEL (一个实例的标识)} vrrp_instance VI_1 { State MASTER (设置服务器模式,注要大写) interface eth0 (实例网卡,也就是提供服务的网卡) virtual_router_id 51 priority 100 (设定权值为100 主备之间的权值差***大于50 权值范围为0~255) advert_int 1 （检查时间为1秒） authentication { （认证方式为密码认证） auth_type PASS auth_pass 1111} virtual_ipaddress { 10.0.1.10 (10.0.1.10并不存在) } }后面的内容不用改按Esc键退出编辑模式:wq$ sudo mkdir -p /etc/rc.d/init.d$ sudo cp /usr/share/initramfs-tools/scripts/functions /etc/rc.d/init.d/$ sudo vi /etc/init.d/keepalived +23按a或i进入编辑模式daemon keepalived start (默认为daemon keepalived ${KEEPALIVED_OPTIONS})按Esc键退出编辑模式:wq (保存并退出)$ sudo mkdir /var/lock/subsys (注：这个目录重启服务器后会消失，需要将其写道开机启动项中，如写到/etc/rc.local里)$ service keepalived start开机自启动$ sudo vi /etc/rc.local （在exit 0前）按a或i进入编辑模式mkdir /var/lock/subsysservice keepalived start按Esc键退出编辑模式:wq (保存并退出)$ sudo ip a （可以看到eth0多了个10.0.1.10的ip）ipvsadm部分：$ sudo apt-get install ipvsadm$ sudo ipvsadm -A -t 10.0.1.10:22 -s rr （注rr为轮询模式）$ sudo ipvsadm -a -t 10.0.1.10:22 -r 10.0.1.3:22 -g$ sudo ipvsadm -a -t 10.0.1.10:22 -r 10.0.1.4:22 -g$ sudo ipvsadm --save (保存ipvsadm设置)$ sudo ipvsadm -l (查看ipvsadm设置)$ sudo ipvsadm -C (清除ipvsadm设置)$ sudo ipvsadm -a (增加real服务器,如：$ sudo ipvsadm -a -t 10.0.1.10:22 -r 10.0.1.3:22 -g)$ sudo ipvsadm -d (删除real服务器，如：$ sudo ipvsadm -d -t 10.0.1.10:22 -r 10.0.1.3:22)设置开机自启动：$ sudo vi /etc/rc.local (在exit 0上面)按a或i进入编辑模式ipvsadm -A -t 10.0.1.10:22 -s rr （注rr为轮询模式）ipvsadm -a -t 10.0.1.10:22 -r 10.0.1.3:22 -gipvsadm -a -t 10.0.1.10:22 -r 10.0.1.4:22 -gipvsadm --save按Esc键退出编辑模式:wq (保存并退出)BACKUP服务器步骤同上，只需将/etc/keepalived/keepalived.conf里的MASTER改为BACKUP，priority改为50即可BACKUP服务器ip a显示eth0没有多出10.0.1.10这个ip，等MASTER服务器宕后就会显示出来，当MASTER服务器正常后会自动消失ipvsadm客户端（10.0.1.3）$ sudo ifconfig lo:0 10.0.1.10 netmask 255.255.255.255 broadcast 10.0.1.10$ sudo ip a (查看设置是否生效)$ sudo route add -host 10.0.1.10 dev lo:0$ sudo route -n (查看设置是否生效)$ sudo echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore$ sudo echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore$ sudo echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce$ sudo echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce设置开机自启动：$ sudo vi /etc/rc.local (在exit 0上面)按a或i进入编辑模式ifconfig lo:0 10.0.1.10 netmask 255.255.255.255 broadcast 10.0.1.10按Esc键退出编辑模式:wq (保存并退出)ipvsadm客户端（10.0.1.4）$ sudo ifconfig lo:0 10.0.1.10 netmask 255.255.255.255 broadcast 10.0.1.10$ sudo ip a (查看设置是否生效)$ sudo route add -host 10.0.1.10 dev lo:0$ sudo route -n (查看设置是否生效)$ sudo echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore$ sudo echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore$ sudo echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce$ sudo echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce设置开机自启动：$ sudo vi /etc/rc.local (在exit 0上面)按a或i进入编辑模式ifconfig lo:0 10.0.1.10 netmask 255.255.255.255 broadcast 10.0.1.10按Esc键退出编辑模式:wq (保存并退出)验证：putty或ssh 10.0.1.10 （第一次登录的是10.0.1.3，第二次登录的是10.0.1.4）
本文转自linux博客51CTO博客，原文链接http://blog.51cto.com/yangzhiming/1441474如需转载请自行联系原作者
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