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Storage

HostPath examples (PV,PVC,Pod) /var/log

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# oc adm policy add-cluster-role-to-user sudoer admin
# oc create sa anyuid
# oc adm policy add-scc-to-user anyuid -z anyuid --as=system:admin

# Don't forget:  chcon -Rt svirt_sandbox_file_t /pv/hostpath-example
oc create -f - <<EOF
apiVersion: v1
kind: PersistentVolume
metadata:
  creationTimestamp: null
  name: hostpath-var-log
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 100Mi
  hostPath:
    path: /var/log
  persistentVolumeReclaimPolicy: Retain
EOF

oc create -f - <<EOF
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: hostpath
spec:
  accessModes: [ "ReadWriteMany" ]
  resources:
    requests:
      storage: 100Mi
EOF

oc create -f - <<EOF
apiVersion: v1
kind: Pod
metadata:
  name: busybox-hostpath
spec:
  containers:
    - name: busybox-hostpath
      image: busybox
      command: [ "/bin/sh", "-c", "while true ; do date; sleep 1; done;" ]
      volumeMounts:
        - mountPath: /hostpath
          name: hostpath
  volumes:
    - name: hostpath
      persistentVolumeClaim:
        claimName: hostpath
  restartPolicy: Never
EOF

Dynamic Provisioning

PVC with StorageClass

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apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: example-pvc-rwo
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: standard

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apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: gce1
  annotations:
    volume.alpha.kubernetes.io/storage-class: anything
spec:
  accessModes: [ "ReadWriteOnce" ]
  resources:
    requests:
      storage: 10Gi

PVC label selector

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apiVersion: v1
kind: PersistentVolume
metadata:
  creationTimestamp: null
  labels:
    special: "10"
    type: nfs
  name: pv-utility-app5g0010
spec:
  accessModes:
  - ReadWriteMany
  capacity:
    storage: 5Gi
  nfs:
    path: /exports/app/app5g0010
    server: utility
  persistentVolumeReclaimPolicy: Recycle
status: {}

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apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-utility-app5g0010
spec:
  accessModes: [ "ReadWriteMany" ]
  selector:
    matchLabels:
      special: 10
  resources:
    requests:
      storage: 2Gi

Example POD to PVC

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apiVersion: v1
kind: Pod
metadata:
  name: busybox
spec:
  containers:
    - name: busybox
      image: busybox
      command: [ "/bin/sh", "-c", "while true ; do date; sleep 1; done;" ]
      volumeMounts:
        - mountPath: /pvc
          name: pvc
  volumes:
    - name: pvc
      persistentVolumeClaim:
        claimName: example-pvc-rwo
  restartPolicy: Never
Last update: April 9, 2023