kubernetes持久性卷和持久性卷声明超出存储

问题描述

通过遵循kubernetes指南，我创建了一个pv，pvc和pod.我只要求20Mi pv中有10Mi.我复制的23Mi比我的PV还要多.但是我的吊舱仍在运行.有人可以解释吗?

By following kubernetes guide i have created a pv, pvc and pod. i have claimed only 10Mi of out of 20Mi pv. I have copied 23Mi that is more than my pv. But my pod is still running. Can any one explain ?

pv-volume.yaml

pv-volume.yaml

kind: PersistentVolume
apiVersion: v1
metadata:
  name: task-pv-volume
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 20Mi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data"

pv-claim.yaml

pv-claim.yaml

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: task-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Mi

pv-pod.yaml

pv-pod.yaml

kind: Pod
apiVersion: v1
metadata:
  name: task-pv-pod
spec:
  volumes:
    - name: task-pv-storage
      persistentVolumeClaim:
       claimName: task-pv-claim
  containers:
    - name: task-pv-container
      image: nginx
      ports:
        - containerPort: 80
          name: "http-server"
      volumeMounts:
        - mountPath: "/usr/share/nginx/html"
          name: task-pv-storage

推荐答案

可能您可以使用任何已应用的POD存储将尽可能多的数据复制到共享存储/mnt/data (在活动节点上)中，/usr/share/nginx/html ，在节点和pod之间共享，直到您的节点停止响应为止.

Probably you can copy as much data into shared storage /mnt/data (on your active node) using any of applied POD's storages ,/usr/share/nginx/html, shared between node and pods till your node will stop responding.

如果您需要在更真实的条件下进行测试，可以考虑使用 GlusterFS ， nfs-utils 创建NFS持久性存储，或挂载原始分区文件用 dd 制成.

In case you need to test this scenario in more real conditions could you please consider create NFS persistent storage using GlusterFS, nfs-utils, or mount a raw partition file made with dd.

在Minikube中，节点使用临时存储.有关节点/吊舱资源的详细信息，您可以在这里找到:

In Minikube nodes are using ephemeral-storages. Detailed information about node/pod resources you can find here:

https://kubernetes.io/docs/tasks/administer-cluster/reserve-compute-resources/#node-allocatable
希望有帮助.

https://kubernetes.io/docs/tasks/administer-cluster/reserve-compute-resources/#node-allocatable
Hope this help.

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