1、安装依赖包
yum -y install libnl libnl-develyum install -y libnfnetlink libnfnetlink-develrpm -ivhlibnfnetlink-1.0.0-1.el6.x86_64.rpm libnfnetlink-devel-1.0.0-1.el6.x86_64.rpm
2、安装Keepalived
cd /apptar -zxfkeepalived-1.3.5.tar.gzcd/app/keepalived-1.3.5./configure make && makeinstall
3、安装后配置开启自启动
cp /usr/local/etc/sysconfig/keepalived/etc/sysconfig/keepalivedcp -r /usr/local/etc/keepalived/ /etc/cp /app/keepalived-1.3.5/keepalived/etc/init.d/keepalived/etc/init.d/keepalivedchkconfig --add keepalivedchkconfig keepalived on
4、配置Keepalived
/etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs { notification_email { acassen@firewall.loc #发生邮件目标地址 failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc #发生邮件源地址 smtp_server 192.168.200.1 #smtp服务器 smtp_connect_timeout 30 router_id LVS_DEVEL #机器标识，通常可设为hostname。故障发生时，邮件通知会用到## -------------------------------------------------- vrrp_skip_check_adv_addr vrrp_strict vrrp_garp_interval 0 vrrp_gna_interval 0}vrrp_script chk_http_port { script "/usr/local/src/check_nginx_pid.sh" #监控服务脚步 interval 2 #检测时间间隔(执行脚步间隔),每2s检测一次 weight 2 #检测失败（脚本返回非0）则优先级 2,增减优先级 fall 2 #检测连续 2 次失败才算确定是真失败。会用weight减少优先级（1-255之间） rise 1 #检测 1 次成功就算成功。但不修改优先级}vrrp_instance VI_1 { state MASTER #主备的区别点，标识 MASTER BACKUP interface eth0 #对应的网卡 # mcast_src_ip 172.29.88.224 #发送多播数据包时的源IP地址,默认绑定网卡的IP virtual_router_id 51 #主、备机的virtual_router_id必须相同 priority 100 #优先级，谁做主(值越大，优先级越高) advert_int 2 #检查间隔，默认为1秒。这就是VRRP的定时器，MASTER每隔这样一个时间间隔，就会发送一个advertisement报文以通知组内其他路由器自己工作正常 authentication { #定义认证方式和密码，主从必须一样 auth_type PASS auth_pass 1111 } track_interface { #监控的网卡。如果只监控服务，这里可以不填 eth1 } track_script { #以脚本为监控chk_http_port是前面填写的 chk_http_port } virtual_ipaddress { #虚拟IP地址,可以设置多个IP地址 10.252.3.165/24 dev eth0 label eth0:1 # 192.168.200.16 # 192.168.200.17 # 192.168.200.18 }} /usr/local/src/check_nginx_pid.sh
## -----------------------------# 该脚本检测ngnix的运行状态，并在nginx进程不存在时尝试重新启动ngnix，如果启动失败则停止keepalived，准备让其它机器接管。## -----------------------------#!/bin/bashcounter=$(ps -C nginx --no-heading|wc -l)if [ "${counter}" = "0" ]; then /usr/local/bin/nginx sleep 2 counter=$(ps -C nginx --no-heading|wc -l) if [ "${counter}" = "0" ]; then /etc/init.d/keepalived stop fifi 5、管理Keepalived
停止：
service keepalived stop
启动：
service keepalived start
重启：
service keepalived restart
重新加载配置文件：
service keepalived reload