Dashboard

Dashboard 是 Kubernetes 社区官方开发的仪表板，有了仪表板后管理者就能够透过 Web-based 方式来管理 Kubernetes 集群，除了提升管理方便，也让资源可视化，让人更直觉看见系统信息的呈现结果。

• 建立kubernetes-dashboard-certs，来提供给 Dashboard TLS 使用

  mkdir -p /etc/kubernetes/addons/certs && cd /etc/kubernetes/addons
  openssl genrsa -des3 -passout pass:x -out certs/dashboard.pass.key 2048
  openssl rsa -passin pass:x -in certs/dashboard.pass.key -out certs/dashboard.key
  openssl req -new -key certs/dashboard.key -out certs/dashboard.csr -subj '/CN=kube-dashboard'
  openssl x509 -req -sha256 -days 365 -in certs/dashboard.csr -signkey certs/dashboard.key -out certs/dashboard.crt
  rm certs/dashboard.pass.key
  kubectl create secret generic kubernetes-dashboard-certs\--from-file=certs -n kube-system

• 在master通过 kubectl 来建立 kubernetes dashboard 即可

  cat <<EOF >  kube-dashboard.yml
  # Copyright 2017 The Kubernetes Authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.# Configuration to deploy release version of the Dashboard UI compatible with
  # Kubernetes 1.8.
  #
  # Example usage: kubectl create -f <this_file># ------------------- Dashboard Secret ------------------- #apiVersion: v1
  kind: Secret
  metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-certsnamespace: kube-system
  type: Opaque---
  # ------------------- Dashboard Service Account ------------------- #apiVersion: v1
  kind: ServiceAccount
  metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kube-system---
  # ------------------- Dashboard Role & Role Binding ------------------- #kind: Role
  apiVersion: rbac.authorization.k8s.io/v1
  metadata:name: kubernetes-dashboard-minimalnamespace: kube-system
  rules:# Allow Dashboard to create 'kubernetes-dashboard-key-holder' secret.
  - apiGroups: [""]resources: ["secrets"]verbs: ["create"]# 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"]---
  apiVersion: rbac.authorization.k8s.io/v1
  kind: RoleBinding
  metadata:name: kubernetes-dashboard-minimalnamespace: kube-system
  roleRef:apiGroup: rbac.authorization.k8s.iokind: Rolename: kubernetes-dashboard-minimal
  subjects:
  - kind: ServiceAccountname: kubernetes-dashboardnamespace: kube-system---
  # ------------------- Dashboard Deployment ------------------- #kind: Deployment
  apiVersion: apps/v1beta2
  metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kube-system
  spec:replicas: 1revisionHistoryLimit: 10selector:matchLabels:k8s-app: kubernetes-dashboardtemplate:metadata:labels:k8s-app: kubernetes-dashboardspec:containers:- name: kubernetes-dashboardimage: registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.8.0imagePullPolicy: IfNotPresentports:- containerPort: 8443protocol: TCPargs:- --tls-key-file=dashboard.key- --tls-cert-file=dashboard.crt#- --auto-generate-certificates# 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:portvolumeMounts:- name: kubernetes-dashboard-certsmountPath: /certs# Create on-disk volume to store exec logs- mountPath: /tmpname: tmp-volumelivenessProbe:httpGet:scheme: HTTPSpath: /port: 8443initialDelaySeconds: 30timeoutSeconds: 30volumes:- name: kubernetes-dashboard-certssecret:secretName: kubernetes-dashboard-certs- name: tmp-volumeemptyDir: {}serviceAccountName: kubernetes-dashboard# Comment the following tolerations if Dashboard must not be deployed on mastertolerations:- key: node-role.kubernetes.io/mastereffect: NoSchedule---
  # ------------------- Dashboard Service ------------------- #kind: Service
  apiVersion: v1
  metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kube-system
  spec:ports:- port: 443targetPort: 8443selector:k8s-app: kubernetes-dashboard
  EOF

  kubectl apply -f kube-dashboard.yml

  cat <<EOF >kube-dashboard-admin.yml
  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
  EOF

  kubectl apply -f kube-dashboard-admin.yml

  kubectl -n kube-system get po,svc -l k8s-app=kubernetes-dashboard

  完成后，就可以透过浏览器访问 Dashboard

  https://10.0.0.162:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/