K8S 部署 Web UI

在早期的版本中 Kubernetes可以在 Dashboard 中看到 heapster 提供的一些图表信息，

在后续的版本中会陆续移除掉 heapster，现在更加流行的监控工具是 prometheus，prometheus 是 Google 内部监控报警系统的开源版本，所以这里的Dashboard 不会看到有图表信息。

1.下载官方的yaml文件

进入官网：https://kubernetes.io/docs/tasks/access-application-cluster/web-ui-dashboard/

$ wget https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml

如果网络不好，不能直接下载，需要手动创建kubernetes-dashboard.yaml文件

2.修改yaml文件

修改两个地方，

第一个是修改镜像，

第二个是添加一个type,指定端口类型为 NodePort，这样外界可以通过地址 nodeIP:nodePort 访问 dashboard；

完整的yaml配置文件如下：

kubernetes-dashboard.yaml

apiVersion: v1

kind: ServiceAccount

metadata:

  name: kubernetes-dashboard

  namespace: kube-system

---

apiVersion: rbac.authorization.k8s.io/v1beta1

kind: ClusterRoleBinding

metadata:

  name: kubernetes-dashboard

  labels:

    k8s-app: kubernetes-dashboard

roleRef:

  apiGroup: rbac.authorization.k8s.io

  kind: ClusterRole

  name: cluster-admin

subjects:

- kind: ServiceAccount

  name: kubernetes-dashboard

  namespace: kube-system

---

apiVersion: extensions/v1beta1

kind: Deployment

metadata:

  name: kubernetes-dashboard

  namespace: kube-system

  labels:

    k8s-app: kubernetes-dashboard

    kubernetes.io/cluster-service: "true"

    addonmanager.kubernetes.io/mode: Reconcile

spec:

  selector:

    matchLabels:

      k8s-app: kubernetes-dashboard

  template:

    metadata:

      labels:

        k8s-app: kubernetes-dashboard

      annotations:

        scheduler.alpha.kubernetes.io/critical-pod: ''

    spec:

      serviceAccountName: kubernetes-dashboard

      containers:

      - name: kubernetes-dashboard

        image: docker.io/mritd/kubernetes-dashboard-amd64

        resources:

          limits:

            cpu: 100m

            memory: 300Mi

          requests:

            cpu: 100m

            memory: 100Mi

        ports:

        - containerPort:

        livenessProbe:

          httpGet:

            path: /

            port:

          initialDelaySeconds:

          timeoutSeconds:

      tolerations:

      - key: "CriticalAddonsOnly"

        operator: "Exists"

---

apiVersion: v1

kind: Service

metadata:

  name: kubernetes-dashboard

  namespace: kube-system

  labels:

    k8s-app: kubernetes-dashboard

    kubernetes.io/cluster-service: "true"

    addonmanager.kubernetes.io/mode: Reconcile

spec:

  selector:

    k8s-app: kubernetes-dashboard

  type: NodePort

  ports:

  - port:

    targetPort:

    nodePort:

3.执行安装

$ kubectl create -f kubernetes-dashboard.yaml

查看pod运行状态

$ kubectl get pods,svc -n kube-system

NAME                                              READY   STATUS    RESTARTS   AGE

pod/coredns-8686dcc4fd-j9vgq                      1/1     Running   31         4d8h

pod/coredns-8686dcc4fd-vzsgs                      1/1     Running   31         4d8h

pod/etcd-k8s-master                               1/1     Running   7          4d8h

pod/kube-apiserver-k8s-master                     1/1     Running   6          4d8h

pod/kube-controller-manager-k8s-master            1/1     Running   7          4d8h

pod/kube-flannel-ds-amd64-4mx58                   1/1     Running   7          4d8h

pod/kube-flannel-ds-amd64-887vr                   1/1     Running   2          4d8h

pod/kube-flannel-ds-amd64-rm9nz                   1/1     Running   5          4d8h

pod/kube-proxy-hdv89                              1/1     Running   7          4d8h

pod/kube-proxy-l2scz                              1/1     Running   6          4d8h

pod/kube-proxy-rqh8n                              1/1     Running   3          4d8h

pod/kube-scheduler-k8s-master                     1/1     Running   6          4d8h

pod/kubernetes-dashboard-795b8c5854-4dnf4         1/1     Running   2          3d5h

NAME                              TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)                       AGE

service/kubernetes-dashboard      NodePort    10.1.165.28   <none>        9090:32000/TCP                3d5h

注意：这里查看到service端口为32000，因此我们访问时需要使用32000端口访问

4.进入ui界面