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keepavlied起初专门为LVS设计的，专门用来监控LVS集群系统中各个服务节点的状态，后来加入VRRP功能，因此除了配合LVS服务外，也可以作为其他服务（nginx，haproxy）的高可用软件。
keepalived服务两大用途：healthcheck 健康检查（针对RS） 、failover 高可用故障转移（主备）
keepalived的安装，主和备都需要安装
和LVS安装一样，最好也先给内核路径做一个软连接到/usr/src/linux
| 1 2 3 4 5 | [root@localhost ~] # ln -s /usr/src/kernels/2.6.32-573.8.1.el6.i686/ /usr/src/linux [root@localhost ~] # cd /usr/local/src/ [root@localhost src] # wget [root@localhost src]# tar xf keepalived-1.1.19.tar.gz [root@localhost src] # cd keepalived-1.1.19 [root@localhost keepalived-1.1.19] # ./configure |
configure执行成功的结果：有3个Yes；支持IPVS框架，IPVS的同步支持，VRRP的框架支持；
Keepalived configuration
------------------------
Keepalived version : 1.1.19
Compiler : gcc
Compiler flags : -g -O2
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : Yes
IPVS sync daemon support : Yes
Use VRRP Framework : Yes
Use Debug flags : No
| 1 2 | [root@localhost keepalived-1.1.19] # make [root@localhost keepalived-1.1.19] # make install |
配置keepalived
| 1 2 3 4 5 6 | [root@localhost keepalived-1.1.19] # cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/ [root@localhost keepalived-1.1.19] # cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/ [root@localhost keepalived-1.1.19] # mkdir /etc/keepalived -p [root@localhost keepalived-1.1.19] # cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/ [root@localhost keepalived-1.1.19] # cp /usr/local/sbin/keepalived /usr/sbin/ [root@localhost keepalived-1.1.19] # /etc/init.d/keepalived start |
主MASTER、备backup上配置文件：/etc/keepalived/keepalived.conf
主master配置：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 150 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.20.100 /24 } } |
备 backup 的配置:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.20.100 /24 } } |
主、备启动keepalived，主绑定VIP地址，主停止keepalived服务，备机马上接管VIP；
本文转自 模范生 51CTO博客，原文链接：http://blog.51cto.com/mofansheng/1715866，如需转载请自行联系原作者