簡介
Kubernetes 儀表板(Dashboard)是基於網頁的 Kubernetes 用戶界面。 你可以使用儀表板:
- 展示了 Kubernetes 集羣中的資源狀態信息和所有報錯信息。
- 把容器應用部署到 Kubernetes 集羣中。
- 對容器應用排錯。
- 管理集羣資源。
- 獲取運行在集羣中的應用的概覽信息。
- 創建或者修改 Kubernetes 資源 (比如:Deployment,Job,DaemonSet 等等)。
安裝
根據 Kubernetes 版本選擇 Kubernetes 儀表板的版本號,具體如下表:
Kubernetes 版本 | Kubernetes 儀表板版本 |
---|---|
1.17 | 2.0.0-rc7 |
1.18 | 2.0.3 |
1.19 | 2.0.5 |
1.20 | 2.3.1 |
1.21 | 2.4.0 |
1.23 | 2.5.1 |
1.24 | 2.6.0 |
執行如下命令安裝 Kubernetes 儀表板 2.6.0
:
kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.6.0/aio/deploy/recommended.yaml
輸出如下:
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created
執行如下命令查看Pod是否已啓動:
kubectl get pod -n kubernetes-dashboard
當我們看到狀態都爲 Running
時,就說明已經啓動成功了,如下所示:
NAME READY STATUS RESTARTS AGE
dashboard-metrics-scraper-8c47d4b5d-l9wrz 1/1 Running 0 2m46s
kubernetes-dashboard-5676d8b865-p9qkp 1/1 Running 0 2m46s
訪問
執行 kubectl proxy
命令後,就可以訪問了,訪問路徑:
http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/
我們可以看到Kubernetes 儀表板的登錄界面,如下圖:
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創建用戶
我們要創建一個名爲 one-more-admin
的 ServiceAccount
,用來登錄 Kubernetes 儀表板。然後再爲這個 ServiceAccount
創建一個 Secret
,最後創建一個 ClusterRolebinding
,將其綁定到 Kubernetes 集羣中默認初始化的 cluster-admin
這個 ClusterRole
上面。
把以下內容保存爲one-more-admin.yaml:
apiVersion: v1
kind: ServiceAccount
metadata:
name: one-more-admin
namespace: kubernetes-dashboard
---
apiVersion: v1
kind: Secret
metadata:
name: one-more-admin
namespace: kubernetes-dashboard
annotations:
kubernetes.io/service-account.name: one-more-admin
type: kubernetes.io/service-account-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: one-more-admin
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: one-more-admin
namespace: kubernetes-dashboard
然後,執行以下命令創建:
kubectl apply -f one-more-admin.yaml
輸出如下:
serviceaccount/one-more-admin created
secret/one-more-admin created
clusterrolebinding.rbac.authorization.k8s.io/one-more-admin created
然後,執行以下命令獲取到 Token :
kubectl -n kubernetes-dashboard describe secret one-more-admin
輸出如下:
Name: one-more-admin
Namespace: kubernetes-dashboard
Labels: <none>
Annotations: kubernetes.io/service-account.name: one-more-admin
kubernetes.io/service-account.uid: 7ce2bedd-b32f-4ec9-8e42-feb1a09b27e5
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1099 bytes
namespace: 20 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IkJnMDBqZFA1eE5DNV9GVXZWQm9Ramp3ZG5wVGFaUXEzRUd1UlU4QTFTbDQifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJvbmUtbW9yZS1hZG1pbiIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50Lm5hbWUiOiJvbmUtbW9yZS1hZG1pbiIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50LnVpZCI6IjdjZTJiZWRkLWIzMmYtNGVjOS04ZTQyLWZlYjFhMDliMjdlNSIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlcm5ldGVzLWRhc2hib2FyZDpvbmUtbW9yZS1hZG1pbiJ9.GAXznIvsWtNJR5EAXMQ2iCa5P3ERg4vZmMYi5E3EDZvaFLD2yltjCv5Ib9sEeMEZ1n9Us6ij6RJNYggl-DhiZL4v8PwDq7LVEBjgbctDn1tOk0mEyWtK3I7vDsvpmc6IXpwIkCUhK427aBBDtz1IjBLIhR070nHmT-SeIoyPKuHle7vOPxSl1gsqnhpWFvhRxvhn65uUqIpz6F2yzqRs1afbmbuyocXt-FRTnHzgf4PZkkB_OU0vC3EUnyjLb_qE8hdWMyluAwFzXoOBkQFektOfHd5ypzfSf2jncrSjWOw_0TJtHsv3OLG9qEzcJm4IiRqW_XUDF3n9DXwnX6zdgQ
把其中的 token 輸入到 Kubernetes 儀表板登錄即可,如下圖:
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