Haproxy HA (Keepalived)

场景：

两台Haproxy主机：192.168.100.40 , 192.168.100.41

生成浮动IP：192.168.100.200 , 192.168.100.201

 

1、安装ipvsadm

yum install ipvsadm -y
ipvsadm -v

2、安装keepalived

yum install keepalived -y
keepalived -v

3、Keepalived配置

在配置keepalived之前，先关闭selinux

vi /etc/selinux/config
SELINUX=disabled
#如果只想临时关闭，直接输入：setenforce 0

增加Haproxy服务检测脚本

#mkdir -p /data/bin
#vim /data/bin/check_haproxy.sh
#!/bin/bash
A=`ps -C haproxy --no-header |wc -l`
if [ $A -eq 0 ];then
killall keepalived #yum install psmisc
fi
#chmod +x check_haproxy.sh

修改配置：

第一台机器

#vim /etc/keepalived/keepalived.conf
global_defs {
        router_id tracker-ha
}
vrrp_script check_tracker {
                script "/data/bin/check_tracker.sh"
                interval 2
                weight 2
}
vrrp_instance VI_3 {
        state MASTER                                
        interface em1
        virtual_router_id 53                       
        priority 100                               
        authentication {
                     auth_type PASS
                     auth_pass eric                
        }
        track_script {
                check_tracker
        }
        virtual_ipaddress {
                192.168.100.202
        }
}

另一台机器：

#vim /etc/keepalived/keepalived.conf
global_defs {
        router_id haproxy-ha
}
vrrp_script check_tracker {
                script "/data/bin/check_tracker.sh"
                interval 2
                weight 2
}
vrrp_instance VI_3 {
        state BACKUP                                
        interface em1
        virtual_router_id 53                       
        priority 99                               
        authentication {
                     auth_type PASS
                     auth_pass eric                
        }
        track_script {
                check_tracker
        }
        virtual_ipaddress {
                192.168.100.202
        }
}

/data/bin/check_tracker.sh

#!/bin/bash
A=`ps -C fdfs_trackerd --no-header |wc -l`                             
if [ $A -eq 0 ];then                                         
   killall fdfs_trackerd   #yum install psmisc
                                 
fi