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

https://cnodejs.org/topic/57aa945c476898b472247d90

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：

1. # Copyright 2015 Google Inc. All Rights Reserved.
2. #
3. # Licensed under the Apache License, Version 2.0 (the "License");
4. # you may not use this file except in compliance with the License.
5. # You may obtain a copy of the License at
6. #
7. # http://www.apache.org/licenses/LICENSE-2.0
8. #
9. # Unless required by applicable law or agreed to in writing, software
10. # distributed under the License is distributed on an "AS IS" BASIS,
11. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12. # See the License for the specific language governing permissions and
13. # limitations under the License.
15. # Configuration to deploy release version of the Dashboard UI.
16. #
17. # Example usage: kubectl create -f
19. kind: Deployment
20. apiVersion: extensions/v1beta1
21. metadata:
22. labels:
23. app: kubernetes-dashboard
24. version: v1. 1.0
25. name: kubernetes-dashboard
26. namespace: kube- system
27. spec:
28. replicas: 1
29. selector:
30. matchLabels:
31. app: kubernetes-dashboard
32. template:
33. metadata:
34. labels:
35. app: kubernetes-dashboard
36. spec:
37. containers:
38. - name: kubernetes-dashboard
39. image: docker.io/mritd/kubernetes-dashboard-amd64
40. imagePullPolicy: Always
41. ports:
42. - containerPort: 9090
43. protocol: TCP
44. args:
45. # Uncomment the following line to manually specify Kubernetes API server Host
46. # If not specified, Dashboard will attempt to auto discover the API server and connect
47. # to it. Uncomment only if the default does not work.
48. - --apiserver-host= 10.11. 3.56: 8080
49. livenessProbe:
50. httpGet:
51. path: /
52. port: 9090
53. initialDelaySeconds: 30
54. timeoutSeconds: 30
55. ---
56. kind: Service
57. apiVersion: v1
58. metadata:
59. labels:
60. app: kubernetes-dashboard
61. name: kubernetes-dashboard
62. namespace: kube-system
63. spec:
64. type: NodePort
65. ports:
66. - 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：

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

1. [root@master cloud] # kubectl describe pods/kubernetes-dashboard-350055417-wf8j1  --namespace="kube-system"                                    
2. Name:           kubernetes-dashboard -350055417-wf8j1
3. Namespace:      kube-system
4. Node:           node -1/ 10.11 .3 .61
5. Start Time:     Wed, 17 Jan 2018 08: 07: 38 + 0100
6. Labels:         app=kubernetes-dashboard
7.                 pod-template-hash= 350055417
8. Status:         Running
9. IP:              172.17 .0 .3
10. Controllers:    ReplicaSet/kubernetes-dashboard -350055417
11. Containers:
12.   kubernetes-dashboard:
13.     Container ID:       docker:// 4fab3e7e09bbd80546aec6f3569b3a59723ef983356e59428879fe06e3359861
14.     Image:              docker.io/mritd/kubernetes-dashboard-amd64
15.     Image ID:           docker-pullable://docker.io/mritd/kubernetes-dashboard-amd64@sha256: 377d905c758d08674fd434e567fbfb4411f64a52090d0de7f64fd70b72b2fbeb
16.     Port:                9090/TCP
17.     Args:
18.       --apiserver-host= 10.11 .3 .56: 8080
19.     State:                      Running
20.       Started:                  Wed, 17 Jan 2018 08: 07: 43 + 0100
21.     Ready:                      True
22.     Restart Count:              0
23.     Liveness:                   http-get http://: 9090/ delay= 30s timeout= 30s period= 10s #success=1 #failure=3
24.     Volume Mounts:             
25.     Environment Variables:     
26. Conditions:
27.   Type          Status
28.   Initialized    True 
29.   Ready          True 
30.   PodScheduled  True 
31. No volumes.
32. QoS Class:      BestEffort
33. Tolerations:   
34. Events:
35.   FirstSeen     LastSeen        Count   From                    SubObjectPath                           Type            Reason                  Message
36.   ---------     --------        -----   ----                    -------------                           --------        ------                  -------
37.   46m            46m              1       {default-scheduler }                                            Normal          Scheduled               Successfully assigned kubernetes-dashboard -350055417-wf8j1 to node -1
38.   46m            46m              1       {kubelet node -1}        spec.containers{kubernetes-dashboard}   Normal          Pulling                 pulling image "docker.io/mritd/kubernetes-dashboard-amd64"
39.   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.
40.   46m            46m              1       {kubelet node -1}        spec.containers{kubernetes-dashboard}   Normal          Pulled                  Successfully pulled image "docker.io/mritd/kubernetes-dashboard-amd64"
41.   46m            46m              1       {kubelet node -1}        spec.containers{kubernetes-dashboard}   Normal          Created                 Created container with docker id 4fab3e7e09bb; Security:[seccomp=unconfined]
42.   46m            46m              1       {kubelet node -1}        spec.containers{kubernetes-dashboard}   Normal          Started                 Started container with docker id 4fab3e7e09bb
43. [root@master cloud] # 

查看service 信息：

1. [root@master cloud] # kubectl describe service/kubernetes-dashboard --namespace="kube-system"
2. Name:                   kubernetes-dashboard
3. Namespace:              kube- system
4. Labels:                 app=kubernetes-dashboard
5. Selector:               app=kubernetes-dashboard
6. Type:                   NodePort
7. IP:                      10.254. 85.224
8. Port:                    80/TCP
9. NodePort:                30943/TCP
10. Endpoints:              172.17. 0. 3: 9090
11. Session Affinity:       None
12. No events.
13. [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

https://blog.csdn.net/harris135/article/details/79086221