Mv pvc k8s

Script

mv-pvc.sh

#!/bin/bash
set -eux

# Function to display usage instructions
usage() {
  echo "Usage: $0 <old_pvc_name> <new_pvc_name> <new_pvc_size_Gi> <new_storage_class> <namespace>"
  exit 1
}

# Check for correct number of arguments
if [ "$#" -ne 5 ]; then
  usage
fi

# Assign arguments to variables
OLD_PVC_NAME="$1"
NEW_PVC_NAME="$2"
NEW_PVC_SIZE_GI="$3"
NEW_STORAGE_CLASS="$4"
NAMESPACE="$5"

# Validate PVC size
if [[ ! "$NEW_PVC_SIZE_GI" =~ ^[0-9]+$ ]]; then
  echo "Error: New PVC size must be a positive integer (Gi)"
  usage
fi


DATA_COPY_POD_NAME="data-copy-pod"

# 1. Create the new PVC
kubectl create -f - <<EOF
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: $NEW_PVC_NAME
  namespace: $NAMESPACE
spec:
  accessModes: [ReadWriteOnce] # Or ReadWriteMany if needed
  resources:
    requests:
      storage: ${NEW_PVC_SIZE_GI}Gi
  storageClassName: $NEW_STORAGE_CLASS
EOF

# 2. Create the data copy pod
kubectl create -f - <<EOF
apiVersion: v1
kind: Pod
metadata:
  name: $DATA_COPY_POD_NAME
  namespace: $NAMESPACE
spec:
  restartPolicy: Never # Important: Only run once
  containers:
  - name: data-copy
    image: alpine:latest
    command: ["sh", "-c", "apk add --no-cache rsync && rsync -av /mnt/old/ /mnt/new/"]
    volumeMounts:
    - name: old-volume
      mountPath: /mnt/old
    - name: new-volume
      mountPath: /mnt/new
  volumes:
  - name: old-volume
    persistentVolumeClaim:
      claimName: $OLD_PVC_NAME
  - name: new-volume
    persistentVolumeClaim:
      claimName: $NEW_PVC_NAME
EOF

# 3. Wait for the data copy to finish (adjust timeout as needed)
# kubectl wait --for=condition=Succeeded --timeout=5m pod/$DATA_COPY_POD_NAME -n $NAMESPACE
kubectl wait --for=condition=Completed --timeout=5m pod/$DATA_COPY_POD_NAME -n $NAMESPACE

# 4. Check the status of the copy pod
kubectl logs $DATA_COPY_POD_NAME -n $NAMESPACE
kubectl get pod $DATA_COPY_POD_NAME -n $NAMESPACE

# 5. (Optional) Update your application deployment to use the new PVC

# 6. (After verifying everything is working) Delete the data copy pod
kubectl delete pod $DATA_COPY_POD_NAME -n $NAMESPACE

# 7. Delete the old PVC (after you're *absolutely sure* you don't need it)
# kubectl delete pvc $OLD_PVC_NAME -n $NAMESPACE

# 8. Delete the old PV (if reclaimPolicy was Retain)
# kubectl get pv # Find the PV associated with the old PVC
# kubectl delete pv <pv-name>