One of two PersistentVolumeClaims' status is "Pending" - kubernetes

Question

I have a file has PV, Service and 2 Pod statefulset including Dynamic PVC.
When I deployed the file, a problem happened at PVC status.
# kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
www-web-0 Bound pv-test 10Gi RWO my-storage-class 7m19s
www-web-1 Pending my-storage-class 7m17s
One of PVC's Status is "Pending" and the reason is "Storage class name not found".
But one of PVC was created normally.
Below is the content of the file.
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-test
labels:
type: local
spec:
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Delete
storageClassName: "my-storage-class"
capacity:
storage: 10Gi
hostPath:
path: /tmp/data
type: DirectoryOrCreate
---
apiVersion: v1
kind: Service
metadata:
name: nginx
labels:
app: nginx
spec:
ports:
- port: 80
name: web
clusterIP: None
selector:
app: nginx
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: web
spec:
selector:
matchLabels:
app: nginx # has to match .spec.template.metadata.labels
serviceName: "nginx"
replicas: 2 # by default is 1
template:
metadata:
labels:
app: nginx # has to match .spec.selector.matchLabels
spec:
terminationGracePeriodSeconds: 10
containers:
- name: nginx
image: k8s.gcr.io/nginx-slim:0.8
ports:
- containerPort: 80
name: web
volumeMounts:
- name: www
mountPath: /usr/share/nginx/html
volumeClaimTemplates:
- metadata:
name: www
spec:
accessModes: [ "ReadWriteOnce" ]
storageClassName: "my-storage-class"
resources:
requests:
storage: 1Gi
If someone knows the cause, let me know.
Thanks in advance.
Describe information about PV, PVC (www-web-1), Pod (web-1)
kubectl describe pv pv-test
Name: pv-test
Labels: type=local
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"v1","kind":"PersistentVolume","metadata":{"annotations":{},"labels":{"type":"local"},"name":"pv-test"},"spec":{"accessModes...
pv.kubernetes.io/bound-by-controller: yes
Finalizers: [kubernetes.io/pv-protection]
StorageClass: my-storage-class
Status: Bound
Claim: default/www-web-0
Reclaim Policy: Delete
Access Modes: RWX
VolumeMode: Filesystem
Capacity: 10Gi
Node Affinity: <none>
Message:
Source:
Type: HostPath (bare host directory volume)
Path: /tmp/data
HostPathType: DirectoryOrCreate
Events: <none>
#kubectl describe pvc www-web-1
Name: www-web-1
Namespace: default
StorageClass: my-storage-class
Status: Pending
Volume:
Labels: app=nginx
Annotations: <none>
Finalizers: [kubernetes.io/pvc-protection]
Capacity:
Access Modes:
VolumeMode: Filesystem
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning ProvisioningFailed 20s (x7 over 2m) persistentvolume-controller storageclass.storage.k8s.io "my-storage-class" not found
Mounted By: web-1
#kubectl describe po web-1
Name: web-1
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: <none>
Labels: app=nginx
controller-revision-hash=web-6596ffb49b
statefulset.kubernetes.io/pod-name=web-1
Annotations: <none>
Status: Pending
IP:
Controlled By: StatefulSet/web
Containers:
nginx:
Image: k8s.gcr.io/nginx-slim:0.8
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts:
/usr/share/nginx/html from www (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-lnfvq (ro)
Conditions:
Type Status
PodScheduled False
Volumes:
www:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: www-web-1
ReadOnly: false
default-token-lnfvq:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-lnfvq
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 3m43s (x183 over 8m46s) default-scheduler pod has unbound immediate PersistentVolumeClaims (repeated 3 times)

Answer 1

Your volume pv-test has accessModes: - ReadWriteOnce I think you need to create one more volume for second pod.
So I think if www-web-1 is also trying to mount pv-test it won't be able to mount it.

Answer 2

You are using hostpath volume to store the data. You are using /tmp/data on the host. Ensure that /tmp/data directory exists in all the nodes in the cluster.