++rook deletion cleanup

rook/README.md

@@ -161,3 +161,21 @@ Especially these:
 ## Other flux related problems
 
 * The host is not cleared / old /var/lib/rook is persisting
+
+## Cleaning up (after deletion)
+If deletion gets stuck, remove finalizers:
+```
+for CRD in $(kubectl get crd -n rook-ceph | awk '/ceph.rook.io/ {print $1}'); do
+    kubectl get -n rook-ceph "$CRD" -o name | \
+    xargs -I {} kubectl patch -n rook-ceph {} --type merge -p '{"metadata":{"finalizers": [null]}}'
+done
+```
+
+On each server, delete dataDirHostPath and delete Rook disk:
+```
+rm -rf /var/lib/rook
+lvdisplay
+lvremove /dev/ceph-*
+pvdisplay
+pvremove /dev/sd #(ex. /dev/sda)
+```