Kubernetes--学习笔记-3-Kubernetes Web UI部署

一、Kubernetes集群环境

请参考Kubernetes--学习笔记-安装配置和服务部署-2

二，创建kubernetes-dashboard.yaml

在master服务器上创建kubernetes-dashboard.yaml文件，并输入以下内容：

# 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   

kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  labels:
    app: kubernetes-dashboard
    version: v1.1.0
  name: kubernetes-dashboard
  namespace: kube-system
spec:
  replicas: 1
  selector:
    matchLabels:
      app: kubernetes-dashboard
  template:
    metadata:
      labels:
        app: kubernetes-dashboard
    spec:
      containers:
      - name: kubernetes-dashboard
        image: docker.io/mritd/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=10.11.3.56:8080
        livenessProbe:
          httpGet:
            path: /
            port: 9090
          initialDelaySeconds: 30
          timeoutSeconds: 30
---
kind: Service
apiVersion: v1
metadata:
  labels:
    app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kube-system
spec:
  type: NodePort
  ports:
  - port: 80

修改以下几项：

 image: docker.io/mritd/kubernetes-dashboard-amd64 # 这个镜像在创建之前已docker pull 下载下来，避免网络失败

 - --apiserver-host=10.11.3.56:8080 # 这里改成master这的ip地址，不能用master服务器名称，否则会报错失败

执行以下命令创建kubernetes-dashboard：

systemctl create -f kubernetes-dashboard.yaml

创建完成后，查看Pods和Service的详细信息：

[root@master cloud]# kubectl get pods --all-namespaces
NAMESPACE     NAME                                   READY     STATUS    RESTARTS   AGE
default       nginx-pod                              1/1       Running   0          5h
kube-system   kubernetes-dashboard-350055417-wf8j1   1/1       Running   0          44m
[root@master cloud]# 

[root@master cloud]# kubectl describe pods/kubernetes-dashboard-350055417-wf8j1  --namespace="kube-system"                                    
Name:           kubernetes-dashboard-350055417-wf8j1
Namespace:      kube-system
Node:           node-1/10.11.3.61
Start Time:     Wed, 17 Jan 2018 08:07:38 +0100
Labels:         app=kubernetes-dashboard
                pod-template-hash=350055417
Status:         Running
IP:             172.17.0.3
Controllers:    ReplicaSet/kubernetes-dashboard-350055417
Containers:
  kubernetes-dashboard:
    Container ID:       docker://4fab3e7e09bbd80546aec6f3569b3a59723ef983356e59428879fe06e3359861
    Image:              docker.io/mritd/kubernetes-dashboard-amd64
    Image ID:           docker-pullable://docker.io/mritd/kubernetes-dashboard-amd64@sha256:377d905c758d08674fd434e567fbfb4411f64a52090d0de7f64fd70b72b2fbeb
    Port:               9090/TCP
    Args:
      --apiserver-host=10.11.3.56:8080
    State:                      Running
      Started:                  Wed, 17 Jan 2018 08:07:43 +0100
    Ready:                      True
    Restart Count:              0
    Liveness:                   http-get http://:9090/ delay=30s timeout=30s period=10s #success=1 #failure=3
    Volume Mounts:              
    Environment Variables:      
Conditions:
  Type          Status
  Initialized   True 
  Ready         True 
  PodScheduled  True 
No volumes.
QoS Class:      BestEffort
Tolerations:    
Events:
  FirstSeen     LastSeen        Count   From                    SubObjectPath                           Type            Reason                  Message
  ---------     --------        -----   ----                    -------------                           --------        ------                  -------
  46m           46m             1       {default-scheduler }                                            Normal          Scheduled               Successfully assigned kubernetes-dashboard-350055417-wf8j1 to node-1
  46m           46m             1       {kubelet node-1}        spec.containers{kubernetes-dashboard}   Normal          Pulling                 pulling image "docker.io/mritd/kubernetes-dashboard-amd64"
  46m           46m             2       {kubelet node-1}                                                Warning         MissingClusterDNS       kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy.
  46m           46m             1       {kubelet node-1}        spec.containers{kubernetes-dashboard}   Normal          Pulled                  Successfully pulled image "docker.io/mritd/kubernetes-dashboard-amd64"
  46m           46m             1       {kubelet node-1}        spec.containers{kubernetes-dashboard}   Normal          Created                 Created container with docker id 4fab3e7e09bb; Security:[seccomp=unconfined]
  46m           46m             1       {kubelet node-1}        spec.containers{kubernetes-dashboard}   Normal          Started                 Started container with docker id 4fab3e7e09bb
[root@master cloud]# 

查看service 信息：

[root@master cloud]# kubectl describe service/kubernetes-dashboard --namespace="kube-system"
Name:                   kubernetes-dashboard
Namespace:              kube-system
Labels:                 app=kubernetes-dashboard
Selector:               app=kubernetes-dashboard
Type:                   NodePort
IP:                     10.254.85.224
Port:                    80/TCP
NodePort:                30943/TCP
Endpoints:              172.17.0.3:9090
Session Affinity:       None
No events.
[root@master cloud]# 

从kubernetes-dashboard的service详细信息可以看到，该service绑定到了Node节点的30943端口上。现在，通过浏览器访问该端口就能看到Kubernetes的Web UI:

参考链接：

http://blog.csdn.net/u013760355/article/details/70161982

http://blog.csdn.net/zjysource/article/details/52086835