1、安装依赖包
yum -y install libnl libnl-devel yum install -y libnfnetlink libnfnetlink-devel rpm -ivhlibnfnetlink-1.0.0-1.el6.x86_64.rpm libnfnetlink-devel-1.0.0-1.el6.x86_64.rpm
2、安装Keepalived
cd /app tar -zxfkeepalived-1.3.5.tar.gz cd/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/keepalived cp -r /usr/local/etc/keepalived/ /etc/ cp /app/keepalived-1.3.5/keepalived/etc/init.d/keepalived/etc/init.d/keepalived chkconfig --add keepalived chkconfig keepalived on
4、配置Keepalived
/etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected] #发生邮件目标地址
[email protected]
[email protected]
}
notification_email_from [email protected] #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/bash
counter=$(ps -C nginx --no-heading|wc -l)
if [ "${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
fi
fi
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
时间： 2025-01-07 21:31:54