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。

原文地址：http://blog.51cto.com/ylw6006/2067927