Handling PersistentVolumeClaim in DaemonSet

问题

I have a DaemonSet that creates flink task manager pods, one per each node.

Nodes

Say I have two nodes

• node-A
• node-B

Pods

the daemonSet would create

• pod-A on node-A
• pod-B on node-B

Persistent Volume Claim

• I am on AKS and want to use azure-disk for Persistent Storage
• According to the docs : [https://docs.microsoft.com/en-us/azure/aks/azure-disks-dynamic-pv ]
  • an azure disk can be associated on to single node

say I create

• pvc-A for pv-A attached to node-A
• pvc-B for pv-B attached to node-B

Question

How can I associate pod-A on node-A to use pcv-A ?

UPDATE:

After much googling, i stumbled upon that it might be better/cleaner to use a StatefulSet instead. This does mean that you won't get the features available to you via DaemonSet like one pod per node.

https://medium.com/@zhimin.wen/persistent-volume-claim-for-statefulset-8050e396cc51

回答1:

The way to attach a PVC to your DaemonSet pod is not any different than how you do it with other types of pods. Create your PVC and mount it as a volume onto the pod.

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: my-pvc
  namespace: x
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi

This is what the DaemonSet manifest would look like:

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: x
  namespace: x
  labels:
    k8s-app: x
spec:
  selector:
    matchLabels:
      name: x
  template:
    metadata:
      labels:
        name: x
    spec:
      ...
      containers:
      - name: x
        ...
        volumeMounts:
        - name: volume
          mountPath: /var/log
      volumes:
      - name: volume
        persistentVolumeClaim:
          claimName: my-pvc

来源：https://stackoverflow.com/questions/55165517/handling-persistentvolumeclaim-in-daemonset