Keepalived配置安裝

ubuntu 16.04.3系統兩台機器

vipip

hostname

port

192.168.0.200

192.168.0.129(master)

wjt-ceshiji

80192.168.0.200

192.168.0.129(backup)

wjt-ceshiji22

wget

tar zxvf keepalived-2.0.13.tar.gz -c /usr/local cd /usr/local/keepalived-2.0.13 ./configure --prefix=/usr/local/keepalived

make && make install

建立工作目錄並生成配置檔案

mkdir /etc/keepalived

touch /etc/keepalived/keepalived.conf

! configuration file for keepalived global_defs notification_email_from [email protected] #指定發件人 smtp_server 192.168.0.129 #傳送email的smtp位址 smtp_connect_timeout 30 #超時時間 router_id wjt-ceshiji #執行keepalived的機器標識號，主從機必須不同 #vrrp_skip_check_adv_addr #注釋掉vrrp_strict相關是為了解決虛擬ip,ping不通的問題 #vrrp_strict #vrrp_garp_interval 0 #vrrp_gna_interval 0 }vrrp_script chk_nginx vrrp_instance vi_1 advert_int 1 #通訊檢查間隔時間1s authentication track_script virtual_ipaddress

}

! configuration file for keepalived global_defs notification_email_from [email protected] #指定發件人 smtp_server 192.168.0.129 #傳送email的smtp位址 smtp_connect_timeout 30 #超時時間 router_id wjt-ceshiji22 #執行keepalived的機器標識號，主從機必須不同 #vrrp_skip_check_adv_addr #注釋掉vrrp_strict相關是為了解決虛擬ip,ping不通的問題 #vrrp_strict #vrrp_garp_interval 0 #vrrp_gna_interval 0 }vrrp_script chk_nginx vrrp_instance vi_1 advert_int 1 #通訊檢查間隔時間1s authentication track_script virtual_ipaddress

}

router_id #hostname state #master or backup inte***ce #網口

priority #主比從的數值大

為確保vip能夠7*24小時對外提供服務，增加nginx檢查指令碼，當出現異常時殺掉keepalived程序讓vip進行飄逸

#!/bin/bash
a=`ps -c nginx --no-header | wc -l`
if [ $a -eq 0 ];then
/usr/local/nginx/sbin/nginx #嘗試重新啟動nginx
sleep 2 #睡眠2秒
if [ `ps -c nginx --no-header | wc -l` -eq 0 ];then
/usr/bin/killall keepalived #啟動失敗，將keepalived服務殺死。將vip漂移到其它備份節點
fifi

/usr/local/keepalived/sbin/keepalived #啟動keepalived

killall keepalived #停止keepalived

啟動主nginx靜態頁面內容為master，啟動備nginx靜態頁面內容為backup；同時啟動keepalived服務

curl 192.168.0.200 #顯示master 停止master上的keepalived後vip飄逸至backup機器 curl 192.168.0.200 #顯示backup 恢復master上的keepalived後vip飄逸至master機器 curl 192.168.0.200 #顯示master 故意修改master機器的nginx配置檔案為錯誤語法，手動殺掉nginx程序，發現keepalived服務隨即消失 curl 192.168.0.200

#顯示backup

問題：*** warning - this build will not support ipvs with ipv6. please install libnl/libnl-3 dev libraries to support ipv6 with ipvs. 解決：apt-get install libnl-3-200 apt-get install libnl-3-dev apt-get install libnl-genl-3-dev 問題：can't open /etc/rc.d/init.d/functions 解決：ln -s /lib/lsb/init-functions /etc/rc.d/init.d/functions 問題：nginx異常退出並無法啟動時，keepalived程序沒有自動停止且反覆執行chk_nginx.sh的指令碼

解決：原因是chk_nginx函式中interval時間過短（2s）改為5s後正常

ip -o -f inet addr show #查詢系統上的ip

ip -f inet addr delete 192.168.0.202/32 dev ens32 #刪除指定ip

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