kubernetes 服务器出错(服务不可用)：服务器当前无法处理请求(获取nodes.metrics.k8s.io)

cwxwcias 于 2023-05-06 发布在 Kubernetes

关注(0)|答案(2)|浏览(107)

运行'kubectl top nodes'时出现错误：
服务器出错（服务不可用）：服务器当前无法处理请求（获取nodes.metrics.k8s.io）

k8s version:
kubectl version
Client Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.1", GitCommit:"eec55b9ba98609a46fee712359c7b5b365bdd920", GitTreeState:"clean", BuildDate:"2018-12-13T10:39:04Z", GoVersion:"go1.11.2", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.1", GitCommit:"eec55b9ba98609a46fee712359c7b5b365bdd920", GitTreeState:"clean", BuildDate:"2018-12-13T10:31:33Z", GoVersion:"go1.11.2", Compiler:"gc", Platform:"linux/amd64"}

[root@manager ~]# kubectl api-versions
admissionregistration.k8s.io/v1beta1
apiextensions.k8s.io/v1beta1
apiregistration.k8s.io/v1
apiregistration.k8s.io/v1beta1
apps/v1
apps/v1beta1
apps/v1beta2
authentication.k8s.io/v1
authentication.k8s.io/v1beta1
authorization.k8s.io/v1
authorization.k8s.io/v1beta1
autoscaling/v1
autoscaling/v2beta1
autoscaling/v2beta2
batch/v1
batch/v1beta1
certificates.k8s.io/v1beta1
coordination.k8s.io/v1beta1
events.k8s.io/v1beta1
extensions/v1beta1
metrics.k8s.io/v1beta1
networking.k8s.io/v1
policy/v1beta1
rbac.authorization.k8s.io/v1
rbac.authorization.k8s.io/v1beta1
scheduling.k8s.io/v1beta1
storage.k8s.io/v1
storage.k8s.io/v1beta1
v1

[root@manager ~]# kubectl get po --all-namespaces

NAMESPACE     NAME                                    READY   STATUS    RESTARTS   AGE
kube-system   coredns-86c58d9df4-km7jc                1/1     Running   0          2d21h
kube-system   coredns-86c58d9df4-vltm9                1/1     Running   0          2d21h
kube-system   etcd-manager                            1/1     Running   0          2d23h
kube-system   kube-apiserver-manager                  1/1     Running   0          5h47m
kube-system   kube-controller-manager-manager         1/1     Running   1          2d23h
kube-system   kube-flannel-ds-amd64-5g8w8             1/1     Running   0          2d23h
kube-system   kube-flannel-ds-amd64-69lcm             1/1     Running   0          2d23h
kube-system   kube-flannel-ds-amd64-9hx2f             1/1     Running   0          2d23h
kube-system   kube-proxy-9s6zm                        1/1     Running   0          2d23h
kube-system   kube-proxy-k4qwz                        1/1     Running   0          2d23h
kube-system   kube-proxy-wnzgd                        1/1     Running   0          2d23h
kube-system   kube-scheduler-manager                  1/1     Running   1          2d23h
kube-system   kubernetes-dashboard-79ff88449c-7fpw6   1/1     Running   0          2d23h
kube-system   metrics-server-68d85f76bb-pj8bs         1/1     Running   0          111m
kube-system   tiller-deploy-5478b6c547-bf82v          1/1     Running   0          4h7m

[root@manager ~]# kubectl logs -f -n kube-system metrics-server-68d85f76bb-pj8bs

I1217 06:42:43.451782       1 serving.go:273] Generated self-signed cert (apiserver.local.config/certificates/apiserver.crt, apiserver.local.config/certificates/apiserver.key)
[restful] 2018/12/17 06:42:44 log.go:33: [restful/swagger] listing is available at https://:443/swaggerapi
[restful] 2018/12/17 06:42:44 log.go:33: [restful/swagger] https://:443/swaggerui/ is mapped to folder /swagger-ui/
I1217 06:42:44.099720       1 serve.go:96] Serving securely on [::]:443

并且没有系统错误日志。如何解决此问题？
操作系统：CentOS Linux release 7.5.1804（Core）

kubernetes

来源：https://stackoverflow.com/questions/53811388/error-from-server-serviceunavailable-the-server-is-currently-unable-to-handle

2条答案

按热度按时间

h79rfbju1#

我已经解决了这个问题，将hostNetwork: true添加到metries-server.yaml：

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    k8s-app: metrics-server
  name: metrics-server
  namespace: kube-system
spec:
  selector:
    matchLabels:
      k8s-app: metrics-server
  strategy:
    rollingUpdate:
      maxUnavailable: 0
  template:
    metadata:
      labels:
        k8s-app: metrics-server
    spec:
      hostNetwork: true ## add

文档：

[root@xx yaml]# kubectl explain deployment.spec.template.spec.hostNetwork
KIND:     Deployment
VERSION:  apps/v1

FIELD:    hostNetwork <boolean>

DESCRIPTION:
     Host networking requested for this pod. Use the host's network namespace.
     If this option is set, the ports that will be used must be specified.
     Default to false.

背景：
成功运行度量，但发生了kubectl top nodes：Error from server (ServiceUnavailable): the server is currently unable to handle the request (get nodes.metrics.k8s.io)。

赞(0）回复(0）举报 2023-05-06

rur96b6h2#

此问题已解决：
1.删除代理（file:/etc/kubernetes/manifests/kube-apiserver.yaml）
1.重启kubelet服务
kubectl top nodes现在应该可以工作了

赞(0）回复(0）举报 2023-05-06