当关闭nginx，不会漂移VIP，keepalived只在进程被关闭，宕机，网络中断才会漂移VIP，所以写了个脚本，放到keepalived中执行，发现无法执行脚本，提示如下报错
Keepalived_vrrp: Registering gratuitous ARP shared channel
Keepalived_vrrp: Opening file '/etc/keepalived/keepalived.conf'
Keepalived_vrrp: WARNING - default user 'keepalived_script' for script execution does not exist - please create.
Keepalived_vrrp: Truncating auth_pass to 8 characters
Keepalived_vrrp: Unable to access script curl
Keepalived_vrrp: Disabling track script Check.keepalived since not found
Keepalived_vrrp: VRRP_Instance(VI_1) removing protocol VIPs.
解决办法：
配置文件/etc/keepalived/keepalived.conf添加运行健康检查脚本的用户或者组即可
global_defs {
router_id k8s
添加内容如下：
script_user root #使用root执行脚本
enable_script_security
…
}