我在k8s集群上创建了pod，发现pod被杀死了，并且它的Linux mahcine无法ssh登录。
当我重新启动k8s节点时，我发现节点的原始路径使用了90％。我发现/val/log/maillog的广告连播日志使用了3T，为什么？
pwd
/home/docker/runtime/overlay/c5b8d2bd508ab41057d151aebc55cee707a44a704cbddba268ec929ff7e80542/upper/var/log
du -sh *
2.9T maillog
4.0K messages
tail -n 2 maillog
> Apr 10 23:19:15 visbox1 04-10T23:19:15.417908+08:00 visbox1
> 04-10T23:19:15.417846+08:00 visbox1 04-10T23:19:15.417789+08:00
> visbox1 04-10T23:19:15.417734+08:00 visbox1
> 04-10T23:19:15.417675+08:00 visbox1 04-10T23:19:15.417582+08:00
> visbox1 04-10T23:19:15.417526+08:00 visbox1
> 04-10T23:19:15.417467+08:00 visbox1 04-10T23:19:15.417409+08:00
> visbox1 04-10T23:19:15.417355+08:00 visbox1
> 04-10T23:19:15.417300+08:00 visbox1 04-10T23:19:15.417243+08:00
> visbox1 04-10T23:19:15.417149+08:00 visbox1
> 04-10T23:19:15.417091+08:00 visbox1 04-10T23:19:15.417035+08:00
> visbox1 04-10T23:19:15.416978+08:00 visbox1
> 04-10T23:19:15.416920+08:00 visbox1 04-10T23:19:15.416858+08:00
> visbox1 04-10T23:19:15.416796+08:00 visbox1
> 04-10T23:19:15.416739+08:00 visbox1 04-10T23:19:15.416684+08:00
> visbox1 04-10T23:19:15.416627+08:00 visbox1
> 04-10T23:19:15.416574+08:00 visbox1 04-10T23:19:15.416507+08:00
visbox1是pod的名称