Mv pvc k8s - Revision history

Busk at 05:21, 27 February 2025

2025-02-27T05:21:39Z

Busk at 01:00, 27 February 2025

2025-02-27T01:00:52Z

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Busk at 23:33, 26 February 2025

2025-02-26T23:33:52Z

Busk at 19:09, 26 February 2025

2025-02-26T19:09:30Z

Busk at 18:41, 26 February 2025

2025-02-26T18:41:52Z

Busk at 22:30, 25 February 2025

2025-02-25T22:30:00Z

Busk at 03:58, 25 February 2025

2025-02-25T03:58:35Z

Busk: Created page with "# Script mv-pvc.sh ``` #!/bin/bash set -eux # Function to display usage instructions usage() { echo "Usage: $0
2025-02-25T03:31:42Z

Created page with "# 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..."

New page
# 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>
```

← Older revision		Revision as of 05:21, 27 February 2025
Line 1:		Line 1:
	# Scripts		# Scripts
		+
		+	Alt https://github.com/utkuozdemir/pv-migrate

	Basically create tmp pvc and then copies data from original pvc to tmp pvc, deletes original pvc and then creates new pvc again and copies data back on it.		Basically create tmp pvc and then copies data from original pvc to tmp pvc, deletes original pvc and then creates new pvc again and copies data back on it.

@@ Line 80: / Line 80: @@
    - name: data-copy
      image: alpine:latest
-     command: ["sh", "-c", "apk add --no-cache rsync && rsync -aHAXv --progress /mnt/old/ /mnt/new/"]
+     # command: ["sh", "-c", "apk add --no-cache rsync && rsync --bwlimit=10240 -aHAXv --progress /mnt/old/ /mnt/new/ && sleep infinity"]
      volumeMounts:
      - name: old-volume
@@ Line 102: / Line 103: @@
          break
      else
-         echo "Pod $DATA_COPY_POD_NAME is in phase $PHASE. Waiting 5 seconds..."
+         echo "Pod $DATA_COPY_POD_NAME is in phase $PHASE. Waiting 20 seconds..."
-         sleep 5
+         sleep 20
      fi
 done
@@ Line 138: / Line 139: @@
    - name: data-copy
      image: alpine:latest
-     command: ["sh", "-c", "apk add --no-cache rsync && rsync -aHAXv --progress /mnt/old/ /mnt/new/"]
+     # command: ["sh", "-c", "apk add --no-cache rsync && rsync --bwlimit=10240 -aHAXv --progress /mnt/old/ /mnt/new/ && sleep infinity"]
      volumeMounts:
      - name: old-volume
@@ Line 160: / Line 162: @@
          break
      else
-         echo "Pod $DATA_COPY_POD_NAME is in phase $PHASE. Waiting 5 seconds..."
+         echo "Pod $DATA_COPY_POD_NAME is in phase $PHASE. Waiting 20 seconds..."
-         sleep 5
+         sleep 20
      fi
 done
@@ Line 168: / Line 170: @@
 kubectl delete pod $DATA_COPY_POD_NAME -n $NAMESPACE
 kubectl delete pvc $TMP_PVC_NAME -n $NAMESPACE
 # Scale workload back up

@@ Line 1: / Line 1: @@
-# Script
+# Scripts
-Basically create tmp pvc and then copies data from original pvc to tmp pvc, deletes original pvc and then creates new pvc again and copies data back on it
+Basically create tmp pvc and then copies data from original pvc to tmp pvc, deletes original pvc and then creates new pvc again and copies data back on it.
 main.sh

@@ Line 1: / Line 1: @@
 # Script
-mv-pvc.sh
+Basically create tmp pvc and then copies data from original pvc to tmp pvc, deletes original pvc and then creates new pvc again and copies data back on it
 ```
 #!/bin/bash
@@ Line 16: / Line 33: @@
    usage
 fi
 # Assign arguments to variables
@@ Line 60: / Line 91: @@
    - name: data-copy
      image: alpine:latest
-     command: ["sh", "-c", "apk add --no-cache rsync && rsync -av /mnt/old/ /mnt/new/"]
+     # command: ["sh", "-c", "apk add --no-cache rsync && rsync -av /mnt/old/ /mnt/new/"]
      volumeMounts:
      - name: old-volume
@@ Line 77: / Line 109: @@
 # 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 $NAMESPACE
+# kubectl wait --for=condition=Completed --timeout=5m pod/$DATA_COPY_POD_NAME -n $NAMESPACE
 # 4. Check the status of the copy pod
@@ Line 94: / Line 127: @@
 # kubectl get pv # Find the PV associated with the old PVC
 # kubectl delete pv <pv-name>
 ```