Handling PersistentVolumeClaim in DaemonSet

If you use a persistentVolumeClaim in your daemonset definition, and the persistentVolumeClaim is satisfied with PV with the type of hostPath, your daemon pods will read and write to the local path defined by hostPath. This behavior will help you separate the storage using one PVC.

This might not directly apply to your situation but I hope this helps whoever searching for something like a "volumeClaimTemplate for DaemonSet" in the future.

Using the same example as cookiedough (thank you!)

apiVersion: apps/v1kind: DaemonSetmetadata:  name: x  namespace: x  labels:    k8s-app: xspec:  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

And that PVC is bound to a PV (Note that there is only one PVC and one PV!)

apiVersion: v1kind: PersistentVolumemetadata:  creationTimestamp: null  labels:    type: local  name: memspec:  accessModes:  - ReadWriteOnce  capacity:    storage: 1Gi  hostPath:    path: /tmp/mem    type: Directory  storageClassName: standardstatus: {}

Your daemon pods will actually use /tmp/mem on each node. (There's at most 1 daemon pod on each node so that's fine.)

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: PersistentVolumeClaimapiVersion: v1metadata:  name: my-pvc  namespace: xspec:  accessModes:    - ReadWriteOnce  resources:    requests:      storage: 10Gi

This is what the DaemonSet manifest would look like:

apiVersion: apps/v1kind: DaemonSetmetadata:  name: x  namespace: x  labels:    k8s-app: xspec:  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