Kubernetes dashboard not working, “already exists” and “could not find the requested resource (get services heapster)”
I am new to Kubernetes
The goal is to get Kubernetes cluster dashboard working
The Kubernetes cluster was deployed using Kubespray: github.com/kubernetes-incubator/kubespray
Versions:
Client Version: version.Info{Major:"1", Minor:"7", GitVersion:"v1.7.6", GitCommit:"4bc5e7f9a6c25dc4c03d4d656f2cefd21540e28c", GitTreeState:"clean", BuildDate:"2017-09-15T08:51:21Z", GoVersion:"go1.9", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"7", GitVersion:"v1.7.3+coreos.0", GitCommit:"42de91f04e456f7625941a6c4aaedaa69708be1b", GitTreeState:"clean", BuildDate:"2017-08-07T19:44:31Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}
When I do kubectl create -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml --validate=false as described here
I get:
Error from server (AlreadyExists): error when creating "https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml": secrets "kubernetes-dashboard-certs" already exists
Error from server (AlreadyExists): error when creating "https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml": serviceaccounts "kubernetes-dashboard" already exists
Error from server (AlreadyExists): error when creating "https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml": roles.rbac.authorization.k8s.io "kubernetes-dashboard-minimal" already exists
Error from server (AlreadyExists): error when creating "https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml": rolebindings.rbac.authorization.k8s.io "kubernetes-dashboard-minimal" already exists
Error from server (AlreadyExists): error when creating "https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml": deployments.extensions "kubernetes-dashboard" already exists
Error from server (AlreadyExists): error when creating "https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml": services "kubernetes-dashboard" already exists
When I run kubectl get services --namespace kube-system, I get:
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kube-dns 10.233.0.3 <none> 53/UDP,53/TCP 10d
kubernetes-dashboard 10.233.28.132 <none> 80/TCP 9d
When I try to reach the dashboard kubernetes cluster, I get Connection refused
kubectl logs --namespace=kube-system kubernetes-dashboard-4167803980-1dz53 output:
2017/09/27 10:54:11 Using in-cluster config to connect to apiserver
2017/09/27 10:54:11 Using service account token for csrf signing
2017/09/27 10:54:11 No request provided. Skipping authorization
2017/09/27 10:54:11 Starting overwatch
2017/09/27 10:54:11 Successful initial request to the apiserver, version: v1.7.3+coreos.0
2017/09/27 10:54:11 New synchronizer has been registered: kubernetes-dashboard-key-holder-kube-system. Starting
2017/09/27 10:54:11 Starting secret synchronizer for kubernetes-dashboard-key-holder in namespace kube-system
2017/09/27 10:54:11 Initializing secret synchronizer synchronously using secret kubernetes-dashboard-key-holder from namespace kube-system
2017/09/27 10:54:11 Initializing JWE encryption key from synchronized object
2017/09/27 10:54:11 Creating in-cluster Heapster client
2017/09/27 10:54:11 Serving securely on HTTPS port: 8443
2017/09/27 10:54:11 Metric client health check failed: the server could not find the requested resource (get services heapster). Retrying in 30 seconds.
Other outputs:
kubectl get pods --namespace=kube-system:
NAME READY STATUS RESTARTS AGE
calico-node-bqckz 1/1 Running 0 12d
calico-node-r9svd 1/1 Running 2 12d
calico-node-w3tps 1/1 Running 0 12d
kube-apiserver-kubetest1 1/1 Running 0 12d
kube-apiserver-kubetest2 1/1 Running 0 12d
kube-controller-manager-kubetest1 1/1 Running 2 12d
kube-controller-manager-kubetest2 1/1 Running 2 12d
kube-dns-3888408129-n0m8d 3/3 Running 0 12d
kube-dns-3888408129-z8xx3 3/3 Running 0 12d
kube-proxy-kubetest1 1/1 Running 0 12d
kube-proxy-kubetest2 1/1 Running 0 12d
kube-proxy-kubetest3 1/1 Running 0 12d
kube-scheduler-kubetest1 1/1 Running 2 12d
kube-scheduler-kubetest2 1/1 Running 2 12d
kubedns-autoscaler-1629318612-sd924 1/1 Running 0 12d
kubernetes-dashboard-4167803980-1dz53 1/1 Running 0 1d
nginx-proxy-kubetest3 1/1 Running 0 12d
kubectl proxy:
Starting to serve on 127.0.0.1:8001panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x2692f20]
goroutine 1 [running]:
k8s.io/kubernetes/pkg/kubectl.(*ProxyServer).ServeOnListener(0x0, 0x3a95a60, 0xc420114110, 0x17, 0xc4208b7c28)
/private/tmp/kubernetes-cli-20170915-41661-iccjh1/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubectl/proxy_server.go:201 +0x70
k8s.io/kubernetes/pkg/kubectl/cmd.RunProxy(0x3aa5ec0, 0xc42074e960, 0x3a7f1e0, 0xc42000c018, 0xc4201d7200, 0x0, 0x0)
/private/tmp/kubernetes-cli-20170915-41661-iccjh1/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubectl/cmd/proxy.go:156 +0x774
k8s.io/kubernetes/pkg/kubectl/cmd.NewCmdProxy.func1(0xc4201d7200, 0xc4203586e0, 0x0, 0x2)
/private/tmp/kubernetes-cli-20170915-41661-iccjh1/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubectl/cmd/proxy.go:79 +0x4f
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).execute(0xc4201d7200, 0xc420358500, 0x2, 0x2, 0xc4201d7200, 0xc420358500)
/private/tmp/kubernetes-cli-20170915-41661-iccjh1/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:603 +0x234
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0xc4202e4240, 0x5000107, 0x0, 0xffffffffffffffff)
/private/tmp/kubernetes-cli-20170915-41661-iccjh1/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:689 +0x2fe
k8s.io/kubernetes/vendor/github.com/spf13/cobra.(*Command).Execute(0xc4202e4240, 0xc42074e960, 0x3a7f1a0)
/private/tmp/kubernetes-cli-20170915-41661-iccjh1/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/github.com/spf13/cobra/command.go:648 +0x2b
k8s.io/kubernetes/cmd/kubectl/app.Run(0x0, 0x0)
/private/tmp/kubernetes-cli-20170915-41661-iccjh1/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubectl/app/kubectl.go:39 +0xd5
main.main()
/private/tmp/kubernetes-cli-20170915-41661-iccjh1/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/cmd/kubectl/kubectl.go:26 +0x22
kubectl top nodes:
Error from server (NotFound): the server could not find the requested resource (get services http:heapster:)
kubectl get svc --namespace=kube-system:
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kube-dns 10.233.0.3 <none> 53/UDP,53/TCP 12d
kubernetes-dashboard 10.233.28.132 <none> 80/TCP 11d
curl http://localhost:8001/ui:
curl: (7) Failed to connect to 10.2.3.211 port 8001: Connection refused
How can I get the dashboard working? Appreciate your help.
Answer
you may be installing dashboard version 1.7. try installing version 1.6.3 its well tested.
kubectl create clusterrolebinding add-on-cluster-admin --clusterrole=cluster-admin --serviceaccount=kube-system:default
kubectl create -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.6.3/src/deploy/kubernetes-dashboard.yaml
Update 10/2/17: can you try this: Delete and install 1.6.3 version.
kubectl delete -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml
kubectl create clusterrolebinding add-on-cluster-admin --clusterrole=cluster-admin --serviceaccount=kube-system:default
kubectl create -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.6.3/src/deploy/kubernetes-dashboard.yaml