我使用 kubeadm 来部署我的 Kubernetes 仪表板。当我尝试使用默认服务帐户在我的 dev 命名空间中部署nginx-ingress-controller时，我遇到了liveness probe和 readiness 失败并显示状态码。
nginx-ingress-controller 图像是
gcr.io/google_containers/nginx-ingress-controller:0.9.0-beta.15
我在测试命名空间中也遇到了同样的错误。在我的日志中显示
Received SIGTERM, shutting down
shutting down controller queues
I1201 00:19:48.745970 7 nginx.go:237] stopping NGINX process...
I1201 00:19:48.746923 7 shared_informer.go:112] stop requested
E1201 00:19:48.746985 7 listers.go:63] Timed out waiting for caches to sync
[notice] 22#22: signal process started
shutting down Ingress controller...
Handled quit, awaiting pod deletion
I NGINX process has stopped
Exiting with 0
为什么我在集群范围内出现故障；我的失败在哪里？