Preserve the service namespace during undeploy (#49)

If a pod is on a host that cannot be reached, then any attempt to delete the
namespace will hang.  So change this to preserve the namespace and leave that
pod for k8s to cleanup when it can.

Signed-off-by: Dean Roehrich <[email protected]>

deploy.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Copyright 2023 Hewlett Packard Enterprise Development LP
+# Copyright 2023-2024 Hewlett Packard Enterprise Development LP
 # Other additional copyright holders may be indicated within.
 #
 # The entirety of this work is licensed under the Apache License,
@@ -39,7 +39,8 @@ if [[ $CMD == 'undeploy' ]]; then
     if kubectl get crd servicemonitors.monitoring.coreos.com > /dev/null 2>&1; then
         $KUSTOMIZE build config/prometheus | kubectl delete --ignore-not-found -f-
     fi
-    $KUSTOMIZE build $OVERLAY_DIR | kubectl delete --ignore-not-found -f -
+    # Do not touch the namespace resource when deleting this service.
+    $KUSTOMIZE build $OVERLAY_DIR | yq eval 'select(.kind != "Namespace")' |  kubectl delete --ignore-not-found -f -
 fi
 
 exit 0