Kubernetes集群配置dashboard服务

本文将在前文的基础上介绍kube-ui（也叫dashboard）的创建和使用。这个东西本质上就是webui连接master的api接口，通过api获取k8s集群的相关信息，然后在web上展示出来，对用户来说比较友好一些，实际用处并不是很大。

一、下载镜像文件并纳入本地仓库统一管理

# docker pull docker.io/mritd/kubernetes-dashboard-amd64 # docker tag docker.io/mritd/kubernetes-dashboard-amd64  \ registry.fjhb.cn/kubernetes-dashboard-amd64 # docker push registry.fjhb.cn/kubernetes-dashboard-amd64

二、根据rc文件创建 Deployment和service

# cat kube-ui-rc.yaml # Copyright 2015 Google Inc. All Rights Reserved.  #  # 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.  #  # Example usage: kubectl create -f <this_file> 

kind: Deployment  apiVersion: extensions/v1beta1 metadata:    labels:      app: kubernetes-dashboard      version: latest   name: kubernetes-dashboard    namespace: default spec:    replicas: 1    selector:      matchLabels:        app: kubernetes-dashboard    template:      metadata:        labels:          app: kubernetes-dashboard        # Comment the following annotation if Dashboard must not be deployed on master       annotations:         scheduler.alpha.kubernetes.io/tolerations: |           [             {               "key": "dedicated",               "operator": "Equal",               "value": "master",               "effect": "NoSchedule"             }           ]     spec:        containers:        - name: kubernetes-dashboard          image:  registry.fjhb.cn/kubernetes-dashboard-amd64         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=192.168.115.5:8080          livenessProbe:            httpGet:              path: /              port: 9090            initialDelaySeconds: 30            timeoutSeconds: 30  ---  kind: Service  apiVersion: v1  metadata:    labels:      app: kubernetes-dashboard    name: kubernetes-dashboard    namespace: default spec:    type: NodePort    ports:    - port: 80      targetPort: 9090    selector:      app: kubernetes-dashboard# kubectl create -f kube-ui-rc.yaml # kubectl get svc # kubectl get pod

三、web访问测试 使用两个node节点的ip加端口都可以访问到web-ui界面，本质上是使用iptables nat规则实现的

在面板中可以查看到 Node、deployments、replica sets、replication controllers、pod、jobs、services、ingress、storage、secret等信息，本质上就是通过连接apiserver进行查询并在web-ui上进行展示。