Kubernetes系列：Kubernetes Dashboard

15.1.Dashboard

作為Kube認得Web用戶界面，用戶可以通過Dashboard在Kubernetes集群中部署容器化的應用，對應用進行問題處理和管理，並對集群本身進行管理。通過Dashboard，用戶可以查看集群中應用的運行情況，同時也能夠基於Dashboard創建或修改部署、任務、服務等Kubernetes的資源。通過部署向導，用戶能夠對部署進行擴容縮容，進行滾動更新。重啟Pod或部署新應用，也能夠查看Kubernetes資源的狀態。

dashboard-secret.yaml

apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    # Allows editing resource and makes sure it is created first.
    addonmanager.kubernetes.io/mode: EnsureExists
  name: kubernetes-dashboard-certs
  namespace: kube-system
type: Opaque
---
apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    # Allows editing resource and makes sure it is created first.
    addonmanager.kubernetes.io/mode: EnsureExists
  name: kubernetes-dashboard-key-holder
  namespace: kube-system
type: Opaque

dashboard-configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    # Allows editing resource and makes sure it is created first.
    addonmanager.kubernetes.io/mode: EnsureExists
  name: kubernetes-dashboard-settings
  namespace: kube-system

dashboard-service.yaml

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: 443
    targetPort: 8443

dashboard-rbac.yaml

kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
  name: kubernetes-dashboard-minimal
  namespace: kube-system
rules:
  # Allow Dashboard to get, update and delete Dashboard exclusive secrets.
- apiGroups: [""]
  resources: ["secrets"]
  resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs"]
  verbs: ["get", "update", "delete"]
  # Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.
- apiGroups: [""]
  resources: ["configmaps"]
  resourceNames: ["kubernetes-dashboard-settings"]
  verbs: ["get", "update"]
  # Allow Dashboard to get metrics from heapster.
- apiGroups: [""]
  resources: ["services"]
  resourceNames: ["heapster"]
  verbs: ["proxy"]
- apiGroups: [""]
  resources: ["services/proxy"]
  resourceNames: ["heapster", "http:heapster:", "https:heapster:"]
  verbs: ["get"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: kubernetes-dashboard-minimal
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: kubernetes-dashboard-minimal
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: kubernetes-dashboard-crb
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: admin
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard
  namespace: kube-system

dashboard-controller.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
  name: kubernetes-dashboard
  namespace: kube-system
---
apiVersion: apps/v1
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: ''
        seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
    spec:
      priorityClassName: system-cluster-critical
      containers:
      - name: kubernetes-dashboard
        #image: k8s.gcr.io/kubernetes-dashboard-amd64:v1.8.3
        image: dockeryanxiao/kubernetes-dashboard-amd64
        resources:
          limits:
            cpu: 100m
            memory: 300Mi
          requests:
            cpu: 50m
            memory: 100Mi
        ports:
        - containerPort: 8443
          protocol: TCP
        args:
          # PLATFORM-SPECIFIC ARGS HERE
          - --auto-generate-certificates
        volumeMounts:
        - name: kubernetes-dashboard-certs
          mountPath: /certs
        - name: tmp-volume
          mountPath: /tmp
        livenessProbe:
          httpGet:
            scheme: HTTPS
            path: /
            port: 8443
          initialDelaySeconds: 30
          timeoutSeconds: 30
      volumes:
      - name: kubernetes-dashboard-certs
        secret:
          secretName: kubernetes-dashboard-certs
      - name: tmp-volume
        emptyDir: {}
      serviceAccountName: kubernetes-dashboard
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"

提交資源后查看svc對外提供服務的端口訪問：https://node:svc-port。查看訪問token后使用token登錄：

 kubectl describe secret $(kubectl get secret -n kube-system |grep dashboard-token | awk '{print $1}') -n kube-system

15.2.heapster

heapster-serviceaccount.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: heapster
  namespace: kube-system
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: heapster
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io
subjects:
  - kind: ServiceAccount
    name: heapster
    namespace: kube-system

heapster-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: heapster
  namespace: kube-system
spec:
  selector:
    k8s-app: heapster
  ports:
  - port: 80
    targetPort: 8082

heapster.yaml 

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: heapster
  namespace: kube-system
spec:
  replicas: 1
  template:
    metadata:
      labels:
        task: monitoring
        k8s-app: heapster
    spec:
      serviceAccountName: heapster
      containers:
      - name: heapster
        image: registry.cn-hangzhou.aliyuncs.com/google-containers/heapster-amd64:v1.5.1
        imagePullPolicy: IfNotPresent
        command:
        - /heapster
        #- --source=kubernetes:kubernetes:https://kubernetes.default?useServiceAccount=true&kubeletHttps=true&kubeletPort=10250&insecure=true
        #- --source=kubernetes:https://kubernetes.default
        #- --sink=influxdb:http://monitoring-influxdb:8086
        #- --source=kubernetes:https://kuberntes.default:443?useServiceAccount=true&kubeletHttps=true&kubeletPort=10250&insecure=true
        - --source=kubernetes:kubernetes:https://kuberntes.default?useServiceAccount=true&kubeletHttps=true&kubeletPort=10250&insecure=true
        - --metric-resolution=10s

安裝后dashboard界面會顯示更多功能：