Automount did not work - OpenShift Version 4.16.17

[n00bsi]

[provide a description of the issue]

Version

[provide output of the openshift version or oc version command]

$ oc version
Client Version: 4.16.17
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: 4.16.17
Kubernetes Version: v1.29.8+632b078

Cluster Version: 4.16.17

Steps To Reproduce

storage-mcp.yaml

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfigPool
metadata:
  name: storage
spec:
  machineConfigSelector:
    matchExpressions:
      - {key: machineconfiguration.openshift.io/role, operator: In, values: [worker,storage]}
  nodeSelector:
    matchLabels:
      node-role.kubernetes.io/storage: ""

auto-mount-machineconfig.yaml

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: storage
  name: 71-mount-storage-worker
spec:
  config:
    ignition:
      version: 3.2.0
    systemd:
      units:
        - name: var-mnt-longhorn.mount
          enabled: true
          contents: |
            [Unit]
            Before=local-fs.target
            [Mount]
            # Example mount point, you can change it to where you like for each device.
            Where=/var/mnt/longhorn
            What=/dev/disk/by-label/longhorn
            Options=rw,relatime,discard
            [Install]
            WantedBy=local-fs.target

$ oc get nodes
NAME          STATUS   ROLES                  AGE   VERSION
cp1              Ready    control-plane,master   17h   v1.29.8+632b078
cp2              Ready    control-plane,master   17h   v1.29.8+632b078
cp3              Ready    control-plane,master   17h   v1.29.8+632b078
wn1             Ready    storage,worker         17h   v1.29.8+632b078
wn2             Ready    storage,worker         17h   v1.29.8+632b078
wn3             Ready    storage,worker         17h   v1.29.8+632b078

0. label disk with lonhorn

# ls /dev/disk/by-label/longhorn
/dev/disk/by-label/longhorn

oc label node wn1 node-role.kubernetes.io/storage=
oc label node wn2 node-role.kubernetes.io/storage=
oc label node wn3 node-role.kubernetes.io/storage=

1. oc apply -f storage-mcp.yaml

2. oc apply -f auto-mount-machineconfig.yaml

oc annotate node wn1 --overwrite node.longhorn.io/default-disks-config='[{"path":"/var/mnt/longhorn","allowScheduling":true}]'
oc label node wn1 --overwrite node.longhorn.io/create-default-disk=config

oc annotate node wn2 --overwrite node.longhorn.io/default-disks-config='[{"path":"/var/mnt/longhorn","allowScheduling":true}]'
oc label node wn2 --overwrite node.longhorn.io/create-default-disk=config

oc annotate node wn3 --overwrite node.longhorn.io/default-disks-config='[{"path":"/var/mnt/longhorn","allowScheduling":true}]'
oc label node wn3 --overwrite node.longhorn.io/create-default-disk=config

3. login to all worker nodes create dir /var/mnt/longhorn

4. reboot earch worker node

Current Result

the Disk is not mounted

Expected Result

auto mount this disk

Additional Information

Manual mount works:

sh-5.1# mount /dev/disk/by-label/longhorn /var/mnt/longhorn/

sh-5.1# df -h /var/mnt/longhorn/
Filesystem      Size  Used Avail Use% Mounted on
/dev/sdb        118G   24K  112G   1% /var/mnt/longhorn

$ oc get co

machine-config 4.16.17 True False True 18h Failed to resync 4.16.17 because: error during syncRequiredMachineConfigPools: [context deadline exceeded, failed to update clusteroperator: [client rate limiter Wait returned an error: context deadline exceeded, error MachineConfigPool storage is not ready, retrying. Status: (pool degraded: true total: 3, ready 0, updated: 0, unavailable: 3)]]

What did I wrong ?