二进制部署k8s时,kubelet一直报错

Feb 24 14:15:55 k8s-master01 kubelet[4257]: goroutine 743 [chan receive]:
Feb 24 14:15:55 k8s-master01 kubelet[4257]: k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/watch.(*Broadcaster).loop(0xc000a2cfc0)
Feb 24 14:15:55 k8s-master01 kubelet[4257]: /workspace/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/watch/mux.go:2
Feb 24 14:15:55 k8s-master01 kubelet[4257]: created by k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/watch.NewBroadcaster
Feb 24 14:15:55 k8s-master01 kubelet[4257]: /workspace/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/watch/mux.go:7
Feb 24 14:15:55 k8s-master01 kubelet[4257]: goroutine 744 [chan receive]:
Feb 24 14:15:55 k8s-master01 kubelet[4257]: k8s.io/kubernetes/vendor/k8s.io/client-go/tools/record.(*eventBroadcasterImpl).StartEventWatcher.func1(0x4f3d7c0, 0xc000f7
Feb 24 14:15:55 k8s-master01 kubelet[4257]: /workspace/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/vendor/k8s.io/client-go/tools/record/event.go
Feb 24 14:15:55 k8s-master01 kubelet[4257]: created by k8s.io/kubernetes/vendor/k8s.io/client-go/tools/record.(*eventBroadcasterImpl).StartEventWatcher

上网找了很多资料都不行,最后才想起来去看kubelet的日志文件
/opt/kubernetes/logs/kubelet.xxxxx 看到了这个报错

failed to run Kubelet: misconfiguration: kubelet cgroup driver: "cgroupfs"  is different from docker cgroup driver: "systemd

原来是docker的问题

[root@k8s-master01 logs]# docker info|grep Cgroup
 Cgroup Driver: systemd
 Cgroup Version: 1

解决办法

[root@k8s-master01 logs]# cat /etc/docker/daemon.json
{
  "exec-opts": ["native.cgroupdriver=cgroupfs"],
  "registry-mirrors": ["http://hub-mirror.c.163.com"]
}
[root@k8s-master01 logs]# systemctl restart docker
[root@k8s-master01 logs]# systemctl restart kubelet

这下就正常了