前面說過,資源配額限制在指定名稱空間下,對資源對象數量和特定類型的資源的限制,你可以在 ResourceQuota中指定配額
創建名稱空間
我們創建一個新的名稱空間來演示
kubectl create namespace quota-object-example
創建資源配額
以下是資源配額對象的配置
admin/resource/quota-objects.yaml
apiVersion: v1
kind: ResourceQuota
metadata:
name: object-quota-demo
spec:
hard:
persistentvolumeclaims: "1"
services.loadbalancers: "2"
services.nodeports: "0"
通過kubectl apply創建配額對象
kubectl apply -f https://k8s.io/examples/admin/resource/quota-objects.yaml --namespace=quota-object-example
查看資源配額詳細信息
kubectl get resourcequota object-quota-demo --namespace=quota-object-example --output=yaml
status:
hard:
persistentvolumeclaims: "1"
services.loadbalancers: "2"
services.nodeports: "0"
used:
persistentvolumeclaims: "0"
services.loadbalancers: "0"
services.nodeports: "0"
輸出信息顯示,在quota-object-example名稱空間下,只允許最多有一個PersistentVolumeClaim,最多有兩個LoadBalancer類型的服務,並且不允許有NodePort類型的服務
創建一個PersistentVolumeClaim
以下是創建PersistentVolumeClaim對象的文件
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: pvc-quota-demo
spec:
storageClassName: manual
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 3Gi
通過命令創建它
kubectl apply -f https://k8s.io/examples/admin/resource/quota-objects-pvc.yaml --namespace=quota-object-example
確認已經創建:
kubectl get `persistentvolumeclaims` --namespace=quota-object-example
NAME STATUS
pvc-quota-demo Pending
輸出信息顯示persistentvolumeclaims對象已經創建並且狀態為pending
下面嘗試再創建一個PersistentVolumeClaim
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: pvc-quota-demo-2
spec:
storageClassName: manual
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 4Gi
執行創建命令
kubectl apply -f https://k8s.io/examples/admin/resource/quota-objects-pvc-2.yaml --namespace=quota-object-example
persistentvolumeclaims "pvc-quota-demo-2" is forbidden:
exceeded quota: object-quota-demo, requested: persistentvolumeclaims=1,
used: persistentvolumeclaims=1, limited: persistentvolumeclaims=1
通過輸出信息可以看到,第二個persistantPersistentVolumeClaim沒有被創建,因為超過了資源配額
注:以下字符串類型可以被用來可以被資源配額使用
| 字符串 | API 對象 |
|---|---|
| "pods" | Pod |
| "services | Service |
| "replicationcontrollers" | ReplicationController |
| "resourcequotas" | ResourceQuota |
| "secrets" | Secret |
| "configmaps" | ConfigMap |
| "persistentvolumeclaims" | PersistentVolumeClaim |
| "services.nodeports" | Service of type NodePort |
| "services.loadbalancers" | Service of type LoadBalancer |
刪除資源配額
kubectl delete namespace quota-object-example