Local Volume for Pod-CodePudding

I am trying to make a local volume to save logs from a pod to their node in an isolated environment. So, I am trying to make a PV and a PVC on the specific node that has the tier=production tag. I have labeled the node with the tag:

$ k get nodes --show-labels
NAME             STATUS   ROLES           AGE   VERSION   LABELS
xxx              Ready    Worker          12d   v1.25.2   <lots of lables>,tier=production

Following the Local Volume and the Storage Class docs, I have created the following yaml to deploy the volume, claim, and my pod:

---
# A storage class to define local storage
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer

---
# Volume using a local filesystem
apiVersion: v1
kind: PersistentVolume
metadata:
  name: volume-pv
spec:
  capacity:
    storage: 1Gi
  volumeMode: Filesystem
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /tmp/nginx/
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: tier
          operator: In
          values:
          - production

---
# Request a claim on the file system volume
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: volume-claim
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: local-storage
  volumeMode: Filesystem
  resources:
    requests:
      storage: 1Gi
  selector:
    matchExpressions:
    - key: tier
      operator: In
      values:
      - production

---
# Make a pod that uses the volume
apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  affinity:
    nodeAffinity:
      preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 1
        preference:
          matchExpressions:
          - key: tier
            operator: In
            values:
            - production          
  containers:
  - name: nginx
    image: nginx
    imagePullPolicy: IfNotPresent
    volumeMounts:
    - mountPath: "/var/www/html"
      name: mypd
  volumes:
    - name: mypd
      persistentVolumeClaim:
        claimName: volume-claim

My Volume is available but the PVC is waiting for first consumer to be created before binding which is expected since the Storage Class is set to WaitForFirstConsumer. But my pod is never scheduled, it gives the following warning:

Warning  FailedScheduling  8m25s  default-scheduler  0/1 nodes are available: 1 node(s) didn't find available persistent volumes to bind. preemption: 0/1 nodes are available: 1 Preemption is not helpful for scheduling.

If I remove the volume information from the yaml above, it deploys just fine so I don't know if it is a problem with the pod or something else. How do I get the pod to use the volumes?

CodePudding user response：

Try:

...
# Volume using a local filesystem
apiVersion: v1
kind: PersistentVolume
metadata:
  name: volume-pv
  labels:    # <-- add for your PVC selector to match
    tier: production
...