Kubernetes 部署 Kubernetes-Dashboard v2.0.0 尝鲜

Kubernetes 部署 Kubernetes-Dashboard v2.0.0 尝鲜

2020-04-06 12:22:00 kubernetes dashboard

文章目录

  !版权声明：本博客内容均为原创,每篇博文作为知识积累,写博不易,转载请注明出处。

参考地址：

  • 部署文件 Github 地址：https://github.com/my-dlq/blog-example/tree/master/kubernetes/kubernetes-dashboard2.0.0-deploy

系统环境：

  • Kubernetes 版本：1.18.3
  • kubernetes-dashboard 版本：v2.0.5

一、简介

       Kubernetes Dashboard 是 Kubernetes 集群的基于 Web 的通用 UI。它允许用户管理在群集中运行的应用程序并对其进行故障排除，以及管理群集本身。这个项目在 Github 已经有半年多不更新了，最近推出了 v2.0.0 版本，这里在 Kubernetes 中部署一下，尝试看看新版本咋样。

二、兼容性

Kubernetes版本 1.13 1.14 1.15 1.16 1.17 1.18
兼容性 ？ ？ ？ ？ ? ✓
  • ✕ 不支持的版本范围。
  • ✓ 完全支持的版本范围。
  • ? 由于Kubernetes API版本之间的重大更改，某些功能可能无法在仪表板中正常运行。

三、部署 Kubernetes Dashboard

注意：如果“kube-system”命名空间已经存在 Kubernetes-Dashboard 相关资源，请换成别的 Namespace。

完整部署文件 Github 地址：https://github.com/my-dlq/blog-example/tree/master/kubernetes/kubernetes-dashboard2.0.0-deploy

1、Dashboard RBAC

创建 Dashboard RBAC 部署文件

k8s-dashboard-rbac.yaml

 1apiVersion: v1
 2kind: ServiceAccount
 3metadata:
 4  labels:
 5    k8s-app: kubernetes-dashboard
 6  name: kubernetes-dashboard
 7  namespace: kube-system
 8---
 9apiVersion: rbac.authorization.k8s.io/v1
10kind: Role
11metadata:
12  labels:
13    k8s-app: kubernetes-dashboard
14  name: kubernetes-dashboard
15  namespace: kube-system
16rules:
17  - apiGroups: [""]
18    resources: ["secrets"]
19    resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"]
20    verbs: ["get", "update", "delete"]
21  - apiGroups: [""]
22    resources: ["configmaps"]
23    resourceNames: ["kubernetes-dashboard-settings"]
24    verbs: ["get", "update"]
25  - apiGroups: [""]
26    resources: ["services"]
27    resourceNames: ["heapster", "dashboard-metrics-scraper"]
28    verbs: ["proxy"]
29  - apiGroups: [""]
30    resources: ["services/proxy"]
31    resourceNames: ["heapster", "http:heapster:", "https:heapster:", "dashboard-metrics-scraper", "http:dashboard-metrics-scraper"]
32    verbs: ["get"]
33---
34apiVersion: rbac.authorization.k8s.io/v1
35kind: ClusterRole
36metadata:
37  labels:
38    k8s-app: kubernetes-dashboard
39  name: kubernetes-dashboard
40rules:
41  - apiGroups: ["metrics.k8s.io"]
42    resources: ["pods", "nodes"]
43    verbs: ["get", "list", "watch"]
44---
45apiVersion: rbac.authorization.k8s.io/v1
46kind: RoleBinding
47metadata:
48  labels:
49    k8s-app: kubernetes-dashboard
50  name: kubernetes-dashboard
51  namespace: kube-system
52roleRef:
53  apiGroup: rbac.authorization.k8s.io
54  kind: Role
55  name: kubernetes-dashboard
56subjects:
57  - kind: ServiceAccount
58    name: kubernetes-dashboard
59    namespace: kube-system
60---
61apiVersion: rbac.authorization.k8s.io/v1
62kind: ClusterRoleBinding
63metadata:
64  name: kubernetes-dashboard
65  namespace: kube-system
66roleRef:
67  apiGroup: rbac.authorization.k8s.io
68  kind: ClusterRole
69  name: kubernetes-dashboard
70subjects:
71  - kind: ServiceAccount
72    name: kubernetes-dashboard
73    namespace: kube-system

部署 Dashboard RBAC

1$ kubectl apply -f k8s-dashboard-rbac.yaml

2、创建 ConfigMap、Secret

创建 Dashboard Config & Secret 部署文件

k8s-dashboard-configmap-secret.yaml

 1apiVersion: v1
 2kind: Secret
 3metadata:
 4  labels:
 5    k8s-app: kubernetes-dashboard
 6  name: kubernetes-dashboard-certs
 7  namespace: kube-system
 8type: Opaque
 9---
10apiVersion: v1
11kind: Secret
12metadata:
13  labels:
14    k8s-app: kubernetes-dashboard
15  name: kubernetes-dashboard-csrf
16  namespace: kube-system
17type: Opaque
18data:
19  csrf: ""
20---
21apiVersion: v1
22kind: Secret
23metadata:
24  labels:
25    k8s-app: kubernetes-dashboard
26  name: kubernetes-dashboard-key-holder
27  namespace: kube-system
28type: Opaque
29---
30kind: ConfigMap
31apiVersion: v1
32metadata:
33  labels:
34    k8s-app: kubernetes-dashboard
35  name: kubernetes-dashboard-settings
36  namespace: kube-system

部署 Dashboard Config & Secret

1$ kubectl apply -f k8s-dashboard-configmap-secret.yaml

3、kubernetes-dashboard

创建 Dashboard Deploy 部署文件

k8s-dashboard-deploy.yaml

 1## Dashboard Service
 2kind: Service
 3apiVersion: v1
 4metadata:
 5  labels:
 6    k8s-app: kubernetes-dashboard
 7  name: kubernetes-dashboard
 8  namespace: kube-system
 9spec:
10  type: NodePort
11  ports:
12    - port: 443
13      nodePort: 30001
14      targetPort: 8443
15  selector:
16    k8s-app: kubernetes-dashboard
17---
18## Dashboard Deployment
19kind: Deployment
20apiVersion: apps/v1
21metadata:
22  labels:
23    k8s-app: kubernetes-dashboard
24  name: kubernetes-dashboard
25  namespace: kube-system
26spec:
27  replicas: 1
28  revisionHistoryLimit: 10
29  selector:
30    matchLabels:
31      k8s-app: kubernetes-dashboard
32  template:
33    metadata:
34      labels:
35        k8s-app: kubernetes-dashboard
36    spec:
37      serviceAccountName: kubernetes-dashboard
38      containers:
39        - name: kubernetes-dashboard
40          image: kubernetesui/dashboard:v2.0.5
41          securityContext:
42            allowPrivilegeEscalation: false
43            readOnlyRootFilesystem: true
44            runAsUser: 1001
45            runAsGroup: 2001
46          ports:
47            - containerPort: 8443
48              protocol: TCP
49          args:
50            - --auto-generate-certificates
51            - --namespace=kube-system          #设置为当前部署的Namespace
52          resources:
53            limits:
54              cpu: 1000m
55              memory: 512Mi
56            requests:
57              cpu: 1000m
58              memory: 512Mi
59          livenessProbe:
60            httpGet:
61              scheme: HTTPS
62              path: /
63              port: 8443
64            initialDelaySeconds: 30
65            timeoutSeconds: 30
66          volumeMounts:
67            - name: kubernetes-dashboard-certs
68              mountPath: /certs
69            - name: tmp-volume
70              mountPath: /tmp
71            - name: localtime
72              readOnly: true
73              mountPath: /etc/localtime
74      volumes:
75        - name: kubernetes-dashboard-certs
76          secret:
77            secretName: kubernetes-dashboard-certs
78        - name: tmp-volume
79          emptyDir: {}
80        - name: localtime
81          hostPath:
82            type: File
83            path: /etc/localtime
84      tolerations:
85        - key: node-role.kubernetes.io/master
86          effect: NoSchedule

部署 Dashboard Deploy

1$ kubectl apply -f k8s-dashboard-deploy.yaml

4、创建 kubernetes-metrics-scraper

创建 Dashboard Metrics 部署文件

k8s-dashboard-metrics.yaml

 1## Dashboard Metrics Service
 2kind: Service
 3apiVersion: v1
 4metadata:
 5  labels:
 6    k8s-app: dashboard-metrics-scraper
 7  name: dashboard-metrics-scraper
 8  namespace: kube-system
 9spec:
10  ports:
11    - port: 8000
12      targetPort: 8000
13  selector:
14    k8s-app: dashboard-metrics-scraper
15---
16## Dashboard Metrics Deployment
17kind: Deployment
18apiVersion: apps/v1
19metadata:
20  labels:
21    k8s-app: dashboard-metrics-scraper
22  name: dashboard-metrics-scraper
23  namespace: kube-system
24spec:
25  replicas: 1
26  revisionHistoryLimit: 10
27  selector:
28    matchLabels:
29      k8s-app: dashboard-metrics-scraper
30  template:
31    metadata:
32      labels:
33        k8s-app: dashboard-metrics-scraper
34      annotations:
35        seccomp.security.alpha.kubernetes.io/pod: 'runtime/default'
36    spec:
37      serviceAccountName: kubernetes-dashboard
38      containers:
39        - name: dashboard-metrics-scraper
40          image: kubernetesui/metrics-scraper:v1.0.6
41          securityContext:
42            allowPrivilegeEscalation: false
43            readOnlyRootFilesystem: true
44            runAsUser: 1001
45            runAsGroup: 2001
46          ports:
47            - containerPort: 8000
48              protocol: TCP
49          resources:
50            limits:
51              cpu: 1000m
52              memory: 512Mi
53            requests:
54              cpu: 1000m
55              memory: 512Mi
56          livenessProbe:
57            httpGet:
58              scheme: HTTP
59              path: /
60              port: 8000
61            initialDelaySeconds: 30
62            timeoutSeconds: 30
63          volumeMounts:
64          - mountPath: /tmp
65            name: tmp-volume
66          - name: localtime
67            readOnly: true
68            mountPath: /etc/localtime
69      volumes:
70        - name: tmp-volume
71          emptyDir: {}
72        - name: localtime
73          hostPath:
74            type: File
75            path: /etc/localtime
76      nodeSelector:
77        "beta.kubernetes.io/os": linux
78      tolerations:
79        - key: node-role.kubernetes.io/master
80          effect: NoSchedule

部署 Dashboard Metrics

1$ kubectl apply -f k8s-dashboard-metrics.yaml

5、创建访问的 ServiceAccount

创建一个绑定 admin 权限的 ServiceAccount，获取其 Token 用于访问看板。

创建 Dashboard ServiceAccount 部署文件

k8s-dashboard-token.yaml

 1kind: ClusterRoleBinding
 2apiVersion: rbac.authorization.k8s.io/v1
 3metadata:
 4  name: admin
 5  annotations:
 6    rbac.authorization.kubernetes.io/autoupdate: "true"
 7roleRef:
 8  kind: ClusterRole
 9  name: cluster-admin
10  apiGroup: rbac.authorization.k8s.io
11subjects:
12- kind: ServiceAccount
13  name: admin
14  namespace: kube-system
15---
16apiVersion: v1
17kind: ServiceAccount
18metadata:
19  name: admin
20  namespace: kube-system
21  labels:
22    kubernetes.io/cluster-service: "true"
23    addonmanager.kubernetes.io/mode: Reconcile

部署访问的 ServiceAccount

1$ kubectl apply -f k8s-dashboard-token.yaml

获取 Token

1$ kubectl describe secret/$(kubectl get secret -n kube-system |grep admin|awk '{print $1}') -n kube-system

token：

eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi10b2tlbi1iNGo0aCIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50Lm5hbWUiOiJhZG1pbiIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50LnVpZCI6IjkwMTQzMWYxLTVmNGItMTFlOS05Mjg3LTAwMGMyOWQ5ODY5NyIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlLXN5c3RlbTphZG1pbiJ9.iwE1UdhB78FgXZJh4ByyOZVNh7M1l2CmOOevihOrY9tl_Z5sf3i_04CA33xA2LAMg7WNVYPjGB7vszBlkQyDGw0H5kJzIfL1YnR0JeLQkNk3v9TLyRqKJA2n8pxmJQIJP1xq0OPRGOfcA_n_c5qESs9QFHejVc5vABim8VBGX-pefKoJVXgu3r4w8gr1ORn4l5-LtHdQjSz3Dys7HwZo71fX2aLQR5bOPurkFKXqymcUoBYpWVsf-0cyN7hLRO-x-Z1i-uVpdM8ClpYSHv49eoDJePrcWpRp-Ryq6SNpGhiqCjjifEQAVHbr36QSAx8I1aamqLcpA0Da2qnunw52JA

四、登录新版本 Dashboard 查看

       本人的 Kubernetes 集群地址为"192.168.2.11"并且在 Service 中设置了 NodePort 端口为 30001 和类型为 NodePort 方式访问 Dashboard ，所以访问地址：https://192.168.2.11:30001 进入 Kubernetes Dashboard 页面，然后输入上一步中创建的 ServiceAccount 的 Token 进入 Dashboard，可以看到新的 Dashboard。

        跟上一个版本比较，整体风格更加简洁，并且，可以感受到的是这个页面比以前访问速度更加快速（估计是加了缓存），除了之外还增加了：

  • 新增黑色主题
  • 新增对CRD的管理
  • 新增对集群角色的编辑
  • 新增对 kubernetes 对象以 yaml 格式进行编辑
  • 修改集群资源指标的监控监控信息以及看板样式

五、部署 Metrics Server 为 Dashboard 提供指标数据

Dashboard 已经部署完成，不过登录 Dashboard 后可以看到：

这些栏数据显示都是空，这是由于 Dashboard 的指标部署需要从 Metrics Server 中获取，Dashboard 该版本另一个组件 kubernetes-metrics-scraper 就是用于从 Metrics Server 获取指标的适配器。之前我们已经部署 kubernetes-metrics-scraper 组件，接下来只要再部署 Metrics Server 组件就能获取系统指标数据，供 Dashboard 绘制图形，部署 Metrics Server 可以参考：

当按照上面部署完成后，等一段时间，再刷新 Dashboard 界面，可以观察到如下界面：

--END--

  !版权声明：本博客内容均为原创,每篇博文作为知识积累,写博不易,转载请注明出处。