kube-dashboard generates 502 error #2340
Description
Environment
Dashboard version: 1.6.3
Kubernetes version: 1.6.6
Operating system: Centos7
Steps to reproduce
Installed kube-dashboard according to the instructions provided on the website. When I run
kubectl proxy, I'm unable to access the Dashboard UI at http://localhost:8001/ui/. When I access http://Localhost:8001/ url, I see the kubernetes api stuff, so kubectl itself is working fine.
Observed result
Getting an 502 error on the following url: http://localhost:8001/api/v1/namespaces/kube-system/services/kubernetes-dashboard/proxy/
console output of kubectl proxy:
Starting to serve on 127.0.0.1:8001I0906 16:46:06.470208 31586 logs.go:41] http: proxy error: unexpected EOF
pod log of the dashboard container:
> $ kubectl logs kubernetes-dashboard-2870541577-czpdb --namespace kube-system
Using HTTP port: 8443
Using in-cluster config to connect to apiserver
Using service account token for csrf signing
No request provided. Skipping authorization header
Successful initial request to the apiserver, version: v1.6.6
No request provided. Skipping authorization header
Creating in-cluster Heapster client
Expected result
Expected to see the Dashboard
Comments
I also have heapster installed, and it is able the kubernetes api just fine. So I guess that pod-networking, service-cidr networking, and service accounts itself are working fine. It's only kube-dashboard that is giving me issues.
This is the yml file I used to deploy Dashboard:
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: kubernetes-dashboard
labels:
app: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kube-system
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
app: kubernetes-dashboard
template:
metadata:
labels:
app: kubernetes-dashboard
spec:
containers:
- name: kubernetes-dashboard
image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.6.3
imagePullPolicy: Always
ports:
- containerPort: 9090
protocol: TCP
args:
# Uncomment the following line to manually specify Kubernetes API server Host
# If not specified, Dashboard will attempt to auto discover the API server and connect
# to it. Uncomment only if the default does not work.
# - --apiserver-host=http://my-address:port
livenessProbe:
httpGet:
path: /
port: 9090
initialDelaySeconds: 30
timeoutSeconds: 30
serviceAccountName: kubernetes-dashboard
# Comment the following tolerations if Dashboard must not be deployed on master
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
---
kind: Service
apiVersion: v1
metadata:
labels:
app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
type: ClusterIP
ports:
- port: 80
targetPort: 9090
selector:
app: kubernetes-dashboard