用keepalived作HA(結合haproxy)真是爽呆了,漂移速度非常快,下面是編譯安裝配置過程
#wget http://www.keepalived.org/software/keepalived-1.2.2.tar.gz
#cd keepalived-1.2.2
#./configure
# make && make install && make clean
#cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
#cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
#mkdir /etc/keepalived
#cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
#cp /usr/local/sbin/keepalived /usr/sbin/
修改keepalived.conf
以下是master上的
! Configuration File for keepalived
#全局定義
global_defs {
notification_email { # 郵件通知
[email protected] #郵件位址
}
notification_email_from [email protected] #發件人位址
smtp_server smtp.163.com #smtp server
smtp_connect_timeout 5 #smtp 逾時時間
router_id LVS_DEVEL
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 2
weight 2
vrrp_instance VI_1 { #實列名-可以自定義
state MASTER #角色
interface eth0 #HA檢測的裝置
virtual_router_id 50 #虛拟路由ID一組叢集必須設定為同一個ID,tcpdump vrrp可獲得
priority 200 #權重,backup不能高于master
advert_init 1 #檢測時間間隔
smtp_alert #開啟smtp通知
garp_master_delay 1 #主從切換時間,機關為秒。
mcast_src_ip xxx.xxx.xxx.xxx #master主機位址
authentication { #認證設定
auth_type PASS #認證類型
auth_pass $RFV7ygv #認證密碼,設定為一緻
}
track_interface {
eth0
eth1
virtual_ipaddress { #虛拟IP定義,可以多個
xxx.xxx.xxx.xxx #vip定義
track_script {
chk_haproxy #HA檢測的定義
}
backup上的keepalived
notification_email {
notification_email_from [email protected]
smtp_server smtp.163.com
smtp_connect_timeout 5
vrrp_instance VI_1 {
state BACKUP #角色
interface eth0
virtual_router_id 50 #與master保持一緻
priority 100 #權重低于master
advert_init 1
smtp_alert
garp_master_delay 1
mcast_src_ip xxx.xxx.xxx.xxx #backup主機位址
authentication {
auth_type PASS
auth_pass $RFV7ygv
virtual_ipaddress {
xxx.xxx.xxx.xxx #vip address
chk_haproxy
PS:
配置完keepalived檔案後 ,簡單測試一下哈 ^_^
把master主機網卡停止, 可以瞬間切換到backup主機
啟動master主機的網卡 master又搶占回vip
在業務應用十分頻繁的系統上,如果master發生故障,切換回backup,master主機online後,又切換回到master,如此頻繁的切換是無法容忍的,可以設定不搶占的方法
具體方法是将master主機的state也設定為BACKUP,在state BACKUP下面加入nopreempt
backup主機不需要加入,兩個主機根據priority的高低進行搶占,高的為MASTER主機
本文轉自dongfang_09859 51CTO部落格,原文連結:http://blog.51cto.com/hellosa/530619,如需轉載請自行聯系原作者