O painel do Kubernetes não está funcionando, “já existe” e “não foi possível encontrar o recurso solicitado (obter serviços heapster)”

Question

Eu sou novo no Kubernetes

O objetivo é fazer o painel do cluster do Kubernetes funcionar

Quando faço kubectl create -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml --validate=false como descrito aqui

Eu recebo:

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

Quando executo kubectl get services --namespace kube-system , obtenho:

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

Quando tento acessar o cluster do kubernetes do painel, recebo 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.

Como posso fazer o painel funcionar? Aprecie sua ajuda.

    

Answer 1

Primeiro, exclua tudo:

kubectl delete -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml

Do que recriá-lo:

kubectl create -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml

Iniciar um proxy:

kubectl proxy

Para abri-lo:

http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/

Você também pode usar seu endereço k8s api em vez de localhost. Observe que em algumas novas versões do painel de controle, o endereço curto com ui , por exemplo: k8s.api.example.com/ui não está mais funcionando e você precisa usar o longo e feio explicitamente.