modified: README.md

README.md

@@ -18,6 +18,7 @@ Kubernetes is an open‑source platform that automates the deployment, scaling,
   - [find persistent volume used pvc](#find-persistent-volume-used-pvc)
   - [Patch pv - change to retain policy](#patch-pv---change-to-retain-policy)
   - [Patch pv - remove finalizers](#patch-pv---remove-finalizers)
+  - [check orphans](#check-orphans)
   - [persistent volume claims](#persistent-volume-claims)
   - [Create an pod with PVC](#create-an-pod-with-pvc)
 - [kubectl](#kubectl)
@@ -346,6 +347,39 @@ kubectl patch pv $PV_NAME \
   -p '{"metadata":{"finalizers": null}}'
 ```
 
+### check orphans
+
+**Execute on host:**
+
+``` bash
+#/bin/bash
+STORAGE_DIR="/var/lib/rancher/k3s/storage"
+# clean if already been used
+unset PV_PATHS
+declare -A PV_PATHS
+ORPHANS=()
+
+for name in $(kubectl get pv -o jsonpath='{.items[*].metadata.name}'); do
+    path=$(kubectl get pv ${name} -o jsonpath='{.spec.local.path}' 2>/dev/null)
+    # check if path is no empty
+    [[ -n "${path}" ]] && PV_PATHS["${path}"]="1"
+done
+
+for dir in "$STORAGE_DIR"/*; do
+    [ -d "$dir" ] || continue
+    if [[ -z "${PV_PATHS[$dir]}" ]]; then
+        ORPHANS+=("$dir")
+    fi
+done
+
+if [[ ${#ORPHANS[@]} -eq 0 ]]; then
+    echo "No orphans found."
+else
+    echo "orphans:"
+    printf "%s\n" "${ORPHANS[@]}"
+fi
+```
+
 ### persistent volume claims
 
 ``` yaml