keepalived常用配置

global_defs {
        script_user ubuntu
        enable_script_security
}
vrrp_track_process track_apache {
      process apache2
      weight 10
}

vrrp_script keepalived_check {
        script "/usr/local/bin/keepalived_check.sh"
        interval 1
        timeout 5
        rise 18
        fall 18
}

track_file track_app_file {
        file /tmp/vrrp.txt
}

vrrp_instance VI_1 {
      state BACKUP
      interface enp0s8
      virtual_router_id 51
      priority 240
      advert_int 1
      authentication {
         auth_type PASS
         auth_pass 12345
      }
      virtual_ipaddress {
         192.168.54.200/24
      }
      track_process {
         track_apache
      }
        track_file {
        track_app_file weight 2
}
        track_script {
        keepalived_check weight 8
}

}

 

 

使用keepalived配置mysql又主切换，非抢占式配置，当另一个节点恢复时不会抢占正常使用的节点：

• 两个节点的初始角色都为backup
• 优先级高的节点需要在脚本返回1时，将优先级降至备节点优先级以下；配置nopreept
• 低优先级的节点需要在脚本返回1时，不能设置weight；不配置nopreept；设置weight后，当主故障切至备并恢复后，备因非抢占仍然是master，此时当备故障后，因主非抢占不会抢占为master，不设置weight后，备故障后会将状态设置为fault，此时主才会变为master。

主节点：

global_defs {
router_id za193
}

vrrp_script chk_mysql {
script "/etc/keepalived/check_mysql.sh"
interval 10
timeout 7
weight -60
fall 2
rise 3
}

vrrp_instance VI_1 {
state BACKUP
interface enp4s1
virtual_router_id 195
nopreempt
priority 100
advert_int 2
authentication {
auth_type PASS
auth_pass za195
}
virtual_ipaddress {
10.10.xx.195
}

   unicast_src_ip 10.10.xx.193
        unicast_peer {
                            10.10.xx.194
                    }

track_script {
chk_mysql
}
}
备节点：

global_defs {
  router_id za194
}

vrrp_script chk_mysql {
script "/etc/keepalived/check_mysql.sh"
interval 10
timeout 7
fall 2
rise 3
}


vrrp_instance VI_1 {
   state BACKUP
   interface ens9
   virtual_router_id 195
   priority 50
   advert_int 2
   authentication {
       auth_type PASS
       auth_pass za195
   }

   unicast_src_ip 10.10.xx.194
        unicast_peer {
                            10.10.xx.193
                    }
   virtual_ipaddress {
       10.10.xx.195
   }
track_script {
chk_mysql
}
}