kubernetes-dashboard部署的问题

直接按以下部署会出来几个问题

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml

第一个问题是pod报以下错误，导致 CrashLoopBackOff 

2019/10/12 08:37:25 Starting overwatch
2019/10/12 08:37:25 Using in-cluster config to connect to apiserver
2019/10/12 08:37:25 Using service account token for csrf signing
2019/10/12 08:37:26 Error while initializing connection to Kubernetes apiserver. This most likely means that the cluster is misconfigured (e.g., it has invalid apiserver certificates or service account's configuration) or the --apiserver-host param points to a server that does not exist. Reason: Get https://10.96.0.1:443/version: dial tcp 10.96.0.1:443: connect: no route to host
Refer to our FAQ and wiki pages for more information: https://github.com/kubernetes/dashboard/wiki/FAQ

要解决这个错误就要把Dashboard部署到Master节点，

将kubernetes-dashboard.yaml下载下来，注释掉下面的行

      # Comment the following tolerations if Dashboard must not be deployed on master
      # tolerations:
      - key: node-role.kubernetes.io/master
        effect: NoSchedule

然后添加nodeName（你的Master节点）

    spec:
      nodeName: k8s-master
      containers:
      - name: kubernetes-dashboard
        image: k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.1
        ports:
        - containerPort: 8443
          protocol: TCP

第二个问题是service使用没有使用nodePort，不能从外部访问，需要使用Proxy。

可以通过修改这个yaml里的service服务，添加tyep: nodePort解决

kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kube-system
spec:
  type: NodePort
  ports:
    - port: 443
      targetPort: 8443      
  selector:
    k8s-app: kubernetes-dashboard

第三个，请使用Firefox来访问避免证书无效相关问题。

最后重新发布这个yaml即可，原因可能是apiserver证书权限相关，还没搞清楚，有空查明原因再来更新Blog。

 

通过以下获取随机的nodePort（或者在yaml里指定）

kubectl get svc --all-namespaces

获取Token

kubectl get secret -n kube-system | grep dashboard


kubectl describe secret kubernetes-dashboard-token-7t469 -n kube-system