我们先尝试手动创建一个localStorage的PV

  1. apiVersion: v1
  2. kind: PersistentVolume
  3. metadata:
  4.   name: example-pv
  5. spec:
  6.   capacity:
  7.     storage: 1Gi
  8.   volumeMode: Filesystem
  9.   accessModes:
  10.   - ReadWriteOnce
  11.   persistentVolumeReclaimPolicy: Delete
  12.   storageClassName: local-storage
  13.   local:
  14.     path: /mnt/disks/ssd1

实际上我们apply这样一个PV是会报错的。

The PersistentVolume "example-pv" is invalid: spec.nodeAffinity: Required value: Local volume requires node affinity

只要配置了local-storage，就必须配置nodeaffinity。

apiVersion: v1
kind: PersistentVolume
metadata:
  name: example-pv
spec:
  capacity:
    storage: 1Gi
  volumeMode: Filesystem
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Delete
  storageClassName: local-storage
  local:
    path: /mnt/disks/ssd1
    nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - master

这样就可以了。与之绑定的PVC不需要

怎么查pv和pvc的关系

kubectl get pvc --all-namespaces -o json | jq -j '.items[] | "\(.metadata.namespace), \(.metadata.name), \(.spec.volumeName)\n"'

怎么查pvc和pod的关系

kubectl get po -o json --all-namespaces | jq -j '.items[] | "\(.metadata.namespace), \(.metadata.name), \(.spec.volumes[].persistentVolumeClaim.claimName)\n"' | grep -v null