CentOS 6.3 编译安装HAproxy 1.4.22+keepalived1.2.7

 1.          安装keepalived所须要的依赖包

yum -y install popt-devel openssl-devel

 

2.         下载安装keepalived

wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz tar zxvf keepalived-1.2.7.tar.gz cd keepalived-1.2.7 ./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.32-279.el6.i686/ make &&make install

 

3.         设定keepalived配置文件和启动文件,监控文件

mkdir /etc/keepalived cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/keepalived cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ cp /usr/local/keepalived/sbin/keepalived /sbin/

 

vi /etc/keepalived/keepalived.conf   vrrp_script chk_http_port { script "/etc/keepalived/check_haproxy.sh" interval 2 weight 2   global_defs { router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER           #备机上改成BAKCUP interface eth0 virtual_router_id 51 priority 150             #备机上优先级改成低于150 advert_int 1 authentication { auth_type PASS auth_pass 1111 }   track_script { chk_http_port }   virtual_ipaddress { 192.168.148.200 } } }

 

设定监控文件

vi /etc/keepalived/check_haproxy.sh #!/bin/bash A=`ps -C haproxy --no-header |wc -l` if [ $A -eq 0 ];then /etc/init.d/haproxy restart sleep 3 if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then /etc/init.d/keepalived stop fi fi

 

4.         启动keepalived服务并查看虚拟IP

##启动 /etc/init.d/keepalived start ##查看配置文件中的虚拟IP ip add list 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000     link/ether 00:0c:29:2b:59:50 brd ff:ff:ff:ff:ff:ff     inet 192.168.148.100/24 brd 192.168.148.255 scope global eth0     inet 192.168.148.200/32 scope global eth0     inet6 fe80::20c:29ff:fe2b:5950/64 scope link        valid_lft forever preferred_lft forever

 

5.         在备机部署haproxy+keepalived

在主机上打包并复制到备机: tar zcvf haproxy.tgz haproxy/ tar zcvf keepalived.tgz keepalived/ tar zcvfP /etc/keepalived.tgz /etc/keepalived/ scp /etc/keepalived.tgz test2:/etc/ scp haproxy.tgz keepalived.tgz test2:/usr/local/ scp /etc/init.d/haproxy test2:/etc/init.d/ 在备机上解压缩并复制一些启动文件 tar zxvfP keepalived.tgz -C /etc/ tar zxvf keepalived.tgz -C /usr/local/ tar zxvf haproxy.tgz -C /usr/local/ cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/keepalived cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ cp /usr/local/keepalived/sbin/keepalived /sbin/

 

6.         在备机修改keepalived配置文件并启动

vi /etc/keepalived/keepalived.conf state BACKUP           #备机上改成BAKCUP priority 120           #备机上优先级改成120   /etc/init.d/keepalived start (因为存在check_haproxy.sh,haproxy会自动启动)

 

7.         查看主备机器的VRRP通讯状态是否正常

查看var/log/messages,若是看到都是MASTER STATUS，或者ip add list均可以看到VIP，基本上能够说明VRRP通讯有问题， Nov  6 10:28:10 test1 Keepalived_vrrp[7941]: VRRP_Instance(VI_1) setting protocol VIPs. Nov  6 10:28:10 test1 Keepalived_vrrp[7941]: VRRP_Instance(VI_1) Entering MASTER STATE Nov  6 10:28:09 test1 Keepalived_vrrp[7941]: VRRP_Instance(VI_1) Transition to MASTER STATE   能够用tcpdump –ni eth0 vrrp,看到主备2台服务器都在发VRRP包，正常状况下只有MASTER发送VRRP [root@test1 local]# tcpdump -nni eth0 vrrp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 10:30:13.455292 IP 192.168.148.100 > 224.0.0.18: VRRPv2, Advertisement, vrid 51, prio 152, authtype simple, intvl 1s, length 20 10:30:14.456310 IP 192.168.148.100 > 224.0.0.18: VRRPv2, Advertisement, vrid 51, prio 152, authtype simple, intvl 1s, length 20 10:30:15.457330 IP 192.168.148.100 > 224.0.0.18: VRRPv2, Advertisement, vrid 51, prio 152, authtype simple, intvl 1s, length 20   检查iptables防火墙，须要在2台服务器上都加入如下2条： MASTER: -A INPUT -s 192.168.148.110 -j ACCEPT BACKUP: -A INPUT -s 192.168.148.100 -j ACCEPT

 

8.         进行主备机的HA切换测试

在MASTER上中止keepalived服务 /etc/init.d/keepalived stop   查看BAKCUP /var/log/messages,是否切换到MASTER Nov  6 10:37:27 test2 Keepalived_vrrp[3824]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 192.168.148.200 Nov  6 10:37:22 test2 Keepalived_healthcheckers[3823]: Netlink reflector reports IP 192.168.148.200 added Nov  6 10:37:22 test2 Keepalived_vrrp[3824]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 192.168.148.200 Nov  6 10:37:22 test2 Keepalived_vrrp[3824]: VRRP_Instance(VI_1) setting protocol VIPs. Nov  6 10:37:22 test2 Keepalived_vrrp[3824]: VRRP_Instance(VI_1) Entering MASTER STATE Nov  6 10:37:21 test2 Keepalived_vrrp[3824]: VRRP_Instance(VI_1) Transition to MASTER STATE   查看虚拟IP是否启动 ip add list 2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000     link/ether 00:0c:29:a6:8a:61 brd ff:ff:ff:ff:ff:ff     inet 192.168.148.110/24 brd 192.168.148.255 scope global eth1     inet 192.168.148.200/32 scope global eth1     inet6 fe80::20c:29ff:fea6:8a61/64 scope link        valid_lft forever preferred_lft forever   以上说明切换正常，HAproxy能够在备机正常使用 因为keepalived默认是抢占模式，MASTER恢复后会进行再次切换,能够在配置文件里设置 nopreempt 来禁用这个功能

 

 

 

 

参考资料

http://www.cnblogs.com/dkblog/archive/2011/07/06/2098949.html