Created
August 24, 2019 10:17
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Rename or migrate a PVC from one namespace to another
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#!/bin/bash | |
set -euo pipefail | |
if [[ $# -ne 2 ]]; then | |
echo "Usage: kubectl-mvpvc <ns1/pvc1> <ns2/pvc2>" | |
exit 1 | |
fi | |
NS_PVC_FROM=$1 | |
NS_PVC_TO=$2 | |
if [[ "$NS_PVC_FROM" =~ ([^/]*)/([^/]*) ]]; then | |
NS_FROM=${BASH_REMATCH[1]} | |
PVC_FROM=${BASH_REMATCH[2]} | |
else | |
echo "invalid input: ${NS_PVC_FROM}" | |
exit 1 | |
fi | |
if [[ "$NS_PVC_TO" =~ ([^/]*)/([^/]*) ]]; then | |
NS_TO=${BASH_REMATCH[1]} | |
PVC_TO=${BASH_REMATCH[2]} | |
else | |
echo "invalid input: ${NS_PVC_TO}" | |
exit 1 | |
fi | |
kubectl -n ${NS_FROM} get pvc "$PVC_FROM" > /dev/null | |
kubectl get ns "$NS_TO" > /dev/null | |
if ! kubectl -n "${NS_FROM}" describe pvc "${PVC_FROM}" | grep -q 'Mounted By: <none>'; then | |
echo "error: pvc is mounted" | |
exit 1 | |
fi | |
PVC_BACKUP="${NS_FROM}_${PVC_FROM}.json" | |
kubectl -n ${NS_FROM} get pvc ${PVC_FROM} -o json > ${PVC_BACKUP} | |
pv=$(cat ${PVC_BACKUP} | jq -r .spec.volumeName) | |
echo "pv: ${pv}" | |
kubectl patch pv "$pv" -p '{"spec":{"persistentVolumeReclaimPolicy":"Retain"}}' | |
kubectl -n ${NS_FROM} delete pvc ${PVC_FROM} | |
kubectl patch pv "$pv" -p '{"spec":{"claimRef":null}}' | |
cat "${PVC_BACKUP}" | jq ".metadata.name |= \"${PVC_TO}\" | .metadata.namespace |= \"${NS_TO}\"" | kubectl apply -f - |
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