kubernetes dynamic pv with aws is in pending

Question

I am creating redis-cluster on kube with aws-gp2 persistent volume. I was using  redis-cluster.yml   
 Link:    
  
I have created Storage Class according to this   , for dynamic persistence volume creation.  
  
This is my StorageClass definition

```
    kind: StorageClass
    apiVersion: storage.k8s.io/v1
    metadata:
      name: aws-gp2
    provisioner: kubernetes.io/aws-ebs
    parameters:
      type: gp2
      zones: us-west-2a, us-west-2b, us-west-2c
      fsType: ext4
    reclaimPolicy: Retain
    allowVolumeExpansion: true
```

When I try to create cluster volume creation stuck at **pending** state, after checking logs found this

```
$ kubectl -n staging describe pvc data-redis-cluster-0
Name:          data-redis-cluster-0
Namespace:     staging
StorageClass:
Status:        Pending
Volume:
Labels:        app=redis-cluster
Annotations:   
Finalizers:    [kubernetes.io/pvc-protection]
Capacity:
Access Modes:
Events:
  Type    Reason         Age                From                         Message
  ----    ------         ----               ----                         -------
  Normal  FailedBinding  13s (x11 over 2m)  persistentvolume-controller  no persistent volumes available for this claim and no storage class is set
```

```
$ kubectl -n staging get events
LAST SEEN   FIRST SEEN   COUNT     NAME                                    KIND                    SUBOBJECT   TYPE      REASON             SOURCE                        MESSAGE
10s         10s          1         redis-cluster.15816c6dc1d6c03a          StatefulSet                         Normal    SuccessfulCreate   statefulset-controller        create Claim data-redis-cluster-0 Pod redis-cluster-0 in StatefulSet redis-cluster success
10s         10s          1         redis-cluster.15816c6dc2226fe0          StatefulSet                         Normal    SuccessfulCreate   statefulset-controller        create Pod redis-cluster-0 in StatefulSet redis-cluster successful
8s          10s          3         data-redis-cluster-0.15816c6dc1dfd0cb   PersistentVolumeClaim               Normal    FailedBinding      persistentvolume-controller   no persistent volumes available for this claim and no storage class is set
3s          10s          5         redis-cluster-0.15816c6dc229258d        Pod                                 Warning   FailedScheduling   default-scheduler             pod has unbound PersistentVolumeClaims (repeated 4 times)
```

someone point out what is wrong here ?  
  
stackoverflow : https://stackoverflow.com/questions/54579644/kubernetes-dynamic-pv-with-aws-is-in-pending

Answer

As the message indicates no storage class exists.  
 _no persistent volumes available for this claim and no storage class is set_  
  
What is Pod configuration for storage class?

Answer

> _dvohra wrote:_    
> As the message indicates no storage class exists.  
>  _no persistent volumes available for this claim and no storage class is set_  
>   
> What is Pod configuration for storage class?  
  
I am using StatefulSet and this is the volumeClaimTemplates from https://raw.githubusercontent.com/sanderploegsma/redis-cluster/master/redis-cluster.yml

```
volumeClaimTemplates:
  - metadata:
      name: data
      labels:
        name: redis-cluster
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 100Mi
```

Answer

after adding **storageClassName: aws-gp2** to volumeClaimTemplates, everything resolved

```
      volumeClaimTemplates:
      - metadata:
          namespace: staging
          name: data
          labels:
            name: redis-cluster
        spec:
          accessModes: [ "ReadWriteOnce" ]
          storageClassName: aws-gp2
          resources:
            requests:
              storage: 100Mi
```

kubernetes dynamic pv with aws is in pending

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