How to fix Filesystem Type Not Available in Kubernetes

kubectl get pvc -A
kubectl describe pvc <pvc-name> -n <ns>
kubectl get pvc <pvc-name> -o yaml | grep -i fstype

kubectl get pv
kubectl describe pv <pv-name>

kubectl get storageclass
kubectl describe storageclass <sc-name>

# For local storage:
kubectl get nodes -o wide
ssh <node>
ls /dev/vd*  # Block devices
fsck -n /dev/vda1  # Check filesystem

# For NFS:
kubectl describe storageclass nfs
# Look for: provisioner: nfs, or NFS details

# For cloud provider (AWS EBS, Azure Disk):
# Check documentation for supported fstypes
# EBS: ext4, xfs
# Azure Disk: ext4, xfs

ssh <node-ip>

# For XFS:
modprobe xfs
fs_available=$(lsmod | grep xfs)
if [ -z "$fs_available" ]; then
  echo "XFS not available, installing..."
  sudo yum install xfsprogs  # or apt-get
  sudo modprobe xfs
fi

# For ext4:
fs_available=$(lsmod | grep ext4)

# List available filesystems:
cat /proc/filesystems

kubectl get storageclass <name> -o yaml

# Should look like:
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: fast-storage
provisioner: ebs.csi.aws.com
parameters:
  type: gp3          # AWS: gp3 volume type
  iops: "3000"
  fstype: ext4       # Filesystem type

# For NFS:
provisioner: nfs-client
parameters:
  archiveOnDelete: "false"
  fstype: nfs4       # For NFS

# Create new StorageClass:
kubectl apply -f - <<EOF
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: ext4-storage
provisioner: ebs.csi.aws.com  # For AWS
parameters:
  type: gp3
  iops: "3000"
  fstype: ext4  # Supported
allowVolumeExpansion: true
EOF

# Or for XFS (if supported):
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: xfs-storage
provisioner: ebs.csi.aws.com
parameters:
  type: gp3
  fstype: xfs  # Supported on some providers
EOF

kubectl patch pvc <pvc-name> -n <ns> -p '{"spec":{"storageClassName":"ext4-storage"}}'

# Or delete and recreate:
kubectl delete pvc <pvc-name> -n <ns>

kubectl apply -f - <<EOF
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-pvc
  namespace: default
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: ext4-storage  # Use correct class
EOF

# From provisioner pod:
kubectl exec -it <nfs-provisioner-pod> -n kube-system -- sh

# Test NFS connectivity:
nfs=/nfs/path
... 
nfs_available=$(mount -t nfs | grep $nfs)
if [ -z "$nfs_available" ]; then
  echo "NFS not mounted"
  mount -t nfs <nfs-server>:/export /mnt/nfs
fi

# Check NFS version:
showmount -e <nfs-server>

# Watch PVC status:
kubectl get pvc -A -w

# Check events:
kubectl describe pvc <pvc-name> -n <ns> | grep Events

# Monitor provisioner logs:
kubectl logs -n kube-system -l app=ebs-csi-provisioner -f
kubectl logs -n kube-system -l app=nfs-client-provisioner -f

# Verify PV created:
kubectl get pv | grep <pvc-name>