keepalived 高可用主 脚本

Posted 2021-03-15 gaiting

#!/bin/bash
yum -y install keepalived > /dev/null
touch /opt/kill.sh
cat >/opt/kill.sh<<EOF
#!/bin/bash
systemctl stop keepalived
EOF
same=`grep -f /opt/keepalived_master.conf /etc/keepalived/keepalived.conf|wc -l`
diferent=`cat /etc/keepalived/keepalived.conf|wc -l`
if [ $same -eq  $diferent ];then
        cp /opt/keepalived_master.conf /etc/keepalived/keepalived.conf
fi
systemctl start keepalived
if [ $? -eq 0 ];then
        systemctl stop keepalived
        systemctl start keepalived
fi　　

配置文件 

[root@ localhost opt]# cat keepalived_master.conf 
! Configuration File for keepalived

global_defs {
   notification_email {
     [e-mail]
     [e-mail]
     [e-mail]
   }
   notification_email_from [e-mail]
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
   vrrp_strict
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      	10.0.0.81
    }
}

virtual_server 10.0.0.81 80 {
    delay_loop 6
    persistence_timeout 50
    protocol TCP

    real_server 10.0.0.42 80 {
        weight 1
	notify_down /opt/kill.sh
        TCP_CHECK {
            connect_timeout 3
            connect_port 80
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}