CentOS 6.3 編譯安裝HAproxy 1.4.22+keepalived1.2.7

 1.          安裝keepalived所須要的依賴包

yum -y install popt-devel openssl-devel

 

2.         下載安裝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.         設定keepalived配置文件和啓動文件,監控文件

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           #備機上改成BAKCUP interface eth0 virtual_router_id 51 priority 150             #備機上優先級改成低於150 advert_int 1 authentication { auth_type PASS auth_pass 1111 }   track_script { chk_http_port }   virtual_ipaddress { 192.168.148.200 } } }

 

設定監控文件

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.         啓動keepalived服務並查看虛擬IP

##啓動 /etc/init.d/keepalived start ##查看配置文件中的虛擬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.         在備機部署haproxy+keepalived

在主機上打包並複製到備機: 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/ 在備機上解壓縮並複製一些啓動文件 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.         在備機修改keepalived配置文件並啓動

vi /etc/keepalived/keepalived.conf state BACKUP           #備機上改成BAKCUP priority 120           #備機上優先級改成120   /etc/init.d/keepalived start (因爲存在check_haproxy.sh,haproxy會自動啓動)

 

7.         查看主備機器的VRRP通訊狀態是否正常

查看var/log/messages,若是看到都是MASTER STATUS，或者ip add list均可以看到VIP，基本上能夠說明VRRP通訊有問題， 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   能夠用tcpdump –ni eth0 vrrp,看到主備2臺服務器都在發VRRP包，正常狀況下只有MASTER發送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   檢查iptables防火牆，須要在2臺服務器上都加入如下2條： MASTER: -A INPUT -s 192.168.148.110 -j ACCEPT BACKUP: -A INPUT -s 192.168.148.100 -j ACCEPT

 

8.         進行主備機的HA切換測試

在MASTER上中止keepalived服務 /etc/init.d/keepalived stop   查看BAKCUP /var/log/messages,是否切換到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   查看虛擬IP是否啓動 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   以上說明切換正常，HAproxy能夠在備機正常使用 因爲keepalived默認是搶佔模式，MASTER恢復後會進行再次切換,能夠在配置文件裏設置 nopreempt 來禁用這個功能

 

 

 

 

參考資料

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