Fix: ui_cluster: Stop renaming cluster name when using qdevice

Give user a hint that the cluster name should not be renamed when using
qdevice, should remove qdevice first.

And also automatically restart cluster when there is no any resource
running, when renaming the cluster name.

Fix issue ClusterLabs#1465

crmsh/bootstrap.py

@@ -499,7 +499,7 @@ def is_online():
         return False
 
     # if peer_node is None, this is in the init process
-    if _context.cluster_node is None:
+    if not _context or _context.cluster_node is None:
         return True
     # In join process
     # If the joining node is already online but can't find the init node
@@ -2373,9 +2373,7 @@ def remove_qdevice() -> None:
     if qdevice_reload_policy == qdevice.QdevicePolicy.QDEVICE_RELOAD:
         invoke("crm cluster run 'crm corosync reload'")
     elif qdevice_reload_policy == qdevice.QdevicePolicy.QDEVICE_RESTART:
-        logger.info("Restarting cluster service")
-        utils.cluster_run_cmd("crm cluster restart")
-        wait_for_cluster()
+        restart_cluster()
     else:
         logger.warning("To remove qdevice service, need to restart cluster service manually on each node")
 
@@ -2796,4 +2794,10 @@ def sync_file(path):
         utils.cluster_copy_file(path, nodes=_context.node_list_in_cluster, output=False)
     else:
         csync2_update(path)
+
+
+def restart_cluster():
+    logger.info("Restarting cluster service")
+    utils.cluster_run_cmd("crm cluster restart")
+    wait_for_cluster()
 # EOF

crmsh/qdevice.py

@@ -599,9 +599,7 @@ def start_qdevice_service(self):
             logger.info("Starting corosync-qdevice.service in cluster")
             utils.cluster_run_cmd("systemctl restart corosync-qdevice")
         elif self.qdevice_reload_policy == QdevicePolicy.QDEVICE_RESTART:
-            logger.info("Restarting cluster service")
-            utils.cluster_run_cmd("crm cluster restart")
-            bootstrap.wait_for_cluster()
+            bootstrap.restart_cluster()
         else:
             logger.warning("To use qdevice service, need to restart cluster service manually on each node")
 

crmsh/sbd.py

@@ -456,9 +456,7 @@ def _restart_cluster_and_configure_sbd_ra(self):
         Try to configure sbd resource, restart cluster on needed
         """
         if not xmlutil.CrmMonXmlParser().is_any_resource_running():
-            logger.info("Restarting cluster service")
-            utils.cluster_run_cmd("crm cluster restart")
-            bootstrap.wait_for_cluster()
+            bootstrap.restart_cluster()
             self.configure_sbd_resource_and_properties()
         else:
             logger.warning("To start sbd.service, need to restart cluster service manually on each node")

crmsh/ui_cluster.py

@@ -16,6 +16,7 @@
 from . import bootstrap
 from . import corosync
 from . import qdevice
+from . import xmlutil
 from .cibconfig import cib_factory
 from .prun import prun
 from .service_manager import ServiceManager
@@ -564,8 +565,17 @@ def do_rename(self, context, new_name):
         '''
         Rename the cluster.
         '''
-        if not ServiceManager(sh.ClusterShellAdaptorForLocalShell(sh.LocalShell())).service_is_active("corosync.service"):
+        service_manager = ServiceManager()
+        if not service_manager.service_is_active("corosync.service"):
             context.fatal_error("Can't rename cluster when cluster service is stopped")
+        if service_manager.service_is_active("corosync-qdevice.service"):
+            logger.error("Can't rename cluster when QDevice service is running")
+            suggestion = '''Please run `crm cluster remove --qdevice` on any node in the cluster to remove the QDevice configuration;
+Then rename the cluster;
+Finally run `crm cluster init qdevice` on any node in the cluster to re-deploy the QDevice.'''
+            logger.info(suggestion)
+            return
+
         old_name = cib_factory.get_property('cluster-name')
         if old_name and new_name == old_name:
             context.fatal_error("Expected a different name")
@@ -583,8 +593,11 @@ def do_rename(self, context, new_name):
         if not cib_factory.commit():
             context.fatal_error("Change property cluster-name failed!")
 
-        # it's a safe way to give user a hints that need to restart service
-        context.info("To apply the change, restart the cluster service at convenient time")
+        if xmlutil.CrmMonXmlParser().is_any_resource_running():
+            context.info("To apply the change, restart the cluster service at convenient time")
+        else:
+            bootstrap.restart_cluster()
+
 
     def _parse_clustermap(self, clusters):
         '''