Added --coordinator-only option to "mcs cluster node add"

cmapi/cmapi_server/node_manipulation.py

@@ -1023,7 +1023,7 @@ def _add_WES(root, pm_num, node):
 
 
 def _add_read_only_node(root: etree.Element, node: str, add_other_nodes_dbroots: bool = True) -> None:
-    '''Add node name to ReadOnlyNodes if it is not already there, with attribute'''
+    '''Add node name to ReadOnlyNodes if it is not already there, also set attribute add_other_nodes_dbroots in the tag'''
     read_only_nodes = root.find('./ReadOnlyNodes')
     if read_only_nodes is None:
         read_only_nodes = etree.SubElement(root, 'ReadOnlyNodes')

cmapi/mcs_cluster_tool/cluster_app.py

@@ -206,6 +206,14 @@ def add(
             'Add node (or nodes, if more than one is passed) in read-only '
             'mode.'
         )
+    ),
+    coordinator_only: bool = typer.Option(
+        False,
+        '--coordinator-only',
+        help=(
+            'Add node(s) as coordinator-only (read-only, but does not add other nodes\' dbroots).'
+        ),
+        hidden=True,
     )
 ):
     """Add nodes to the Columnstore cluster."""
@@ -214,9 +222,10 @@ def add(
         timeout=timedelta(days=1).total_seconds(), handle_signals=True,
         extra_nodes=nodes
     ):
+        add_other_nodes_dbroots = not coordinator_only
         for node in nodes:
             result.append(
-                client.add_node({'node': node, 'read_only': read_only})
+                client.add_node({'node': node, 'read_only': read_only, 'add_other_nodes_dbroots': add_other_nodes_dbroots})
             )
     return result