Kubernetes DashBoard部署

DashBoard

在kubernetes中完成的所有操作都是通过命令行工具kubectl完成的。其实，为了提供更丰富的用户体验，kubernetes还开发了一个基于web的用户界面（Dashboard）。用户可以使用Dashboard部署容器化的应用，还可以监控应用的状态，执行故障排查以及管理kubernetes中各种资源。

部署Dashboard

• 下载yaml，并运行Dashboard

# 下载yaml
$ wget  https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0/aio/deploy/recommended.yaml

# 修改kubernetes-dashboard的Service类型
kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  type: NodePort  # 新增
  ports:
    - port: 443
      targetPort: 8443
      nodePort: 30009  # 新增
  selector:
    k8s-app: kubernetes-dashboard

# 部署
$ kubectl create -f recommended.yaml

# 查看namespace下的kubernetes-dashboard下的资源
$ kubectl get pod,svc -n kubernetes-dashboard
NAME                                            READY   STATUS    RESTARTS   AGE
pod/dashboard-metrics-scraper-c79c65bb7-zwfvw   1/1     Running   0          111s
pod/kubernetes-dashboard-56484d4c5-z95z5        1/1     Running   0          111s

NAME                               TYPE       CLUSTER-IP      EXTERNAL-IP  PORT(S)         AGE
service/dashboard-metrics-scraper  ClusterIP  10.96.89.218    <none>       8000/TCP        111s
service/kubernetes-dashboard       NodePort   10.104.178.171  <none>       443:30009/TCP   111s

• 创建访问账户，获取token

# 创建账号
$ kubectl create serviceaccount dashboard-admin -n kubernetes-dashboard

# 授权
$ kubectl create clusterrolebinding dashboard-admin-rb --clusterrole=cluster-admin --serviceaccount=kubernetes-dashboard:dashboard-admin

# 获取账号token
$  kubectl describe secrets dashboard-admin-token-4zkkb -n kubernetes-dashboard
Name:         dashboard-admin-token-4zkkb
Namespace:    kubernetes-dashboard
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: dashboard-admin
              kubernetes.io/service-account.uid: 7053e38e-dc32-4b08-b29b-05c7f4d7a77e

Type:  kubernetes.io/service-account-token

Data
====
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IkFCSDJONDA4aVBsMXBzNXQ0aTROOXJqR3BRRmRIQmZIalA0RnhYZ1ZZSlUifQ.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.OfRIt6qGaCQlRajv5Jt4AEauN_T6kLT_fKv8PcAuVySSP8ZZLPPzYBhA8xdIiIMzM6TulzH_l1ujSBwSwN-3475WJCQM1Ugai4_krqSiipmbvWMvUUsFex7kdx2TDDDlSE1uNeecXJvbjC8iVbbM7iB01vRZ-USWZcgp2XxdhbRcZ-KihnwcUSHXwliM4ZpcbP643B1l9--gx8XA7pdK4nTeqhBTV5xMg7b8ddGg4KE92OtBpAWr48eXURRcYz0Z7f-vheViYyNJU2nEXR5BnGLgJYfbvPW-alY-Stfidxk2hdcLMiYWZglXvg4dsVKTmt_oUDcdYTq5ODm0DbkDtg
ca.crt:     1025 bytes
namespace:  20 bytes

• 通过浏览器访问Dashboard的UI

使用DashBoard

以Deployment为例演示DashBoard的使用

查看

选择指定的命名空间dev，然后点击Deployments，查看dev空间下的所有deployment

扩缩容

在Deployment上点击规模，然后指定目标副本数量，点击确定

编辑

在Deployment上点击编辑，然后修改yaml文件，点击确定

查看Pod

点击Pods, 查看pods列表

操作Pod

选中某个Pod，可以对其执行日志（logs）、进入执行（exec）、编辑、删除操作

Dashboard提供了kubectl的绝大部分功能