Use the new extension call for getting partition UUIDs

This is more efficient (one call instead of up to three) and easier
to debug and understand.

Also remove a bogus warning when no root UUID is returned for whole
disk images. We don't strictly needed, nor do we actually return
anything meaningful.

Change-Id: Ib9ca43b8fe86481179b3045a26e6e3b500f87511
Depends-On: https://review.opendev.org/731742

1 files changed, 16 insertions, 0 deletions

diff --git a/ironic/drivers/modules/agent_client.py b/ironic/drivers/modules/agent_client.py
index eba9e6de8..3edd89196 100644
--- a/ironic/drivers/modules/agent_client.py
+++ b/ironic/drivers/modules/agent_client.py
@@ -467,6 +467,22 @@ class AgentClient(object):
                              method='deploy.execute_deploy_step',
                              params=params)
 
+    @METRICS.timer('AgentClient.get_partition_uuids')
+    def get_partition_uuids(self, node):
+        """Get deploy steps from agent.
+
+        :param node: A node object.
+        :raises: IronicException when failed to issue the request or there was
+                 a malformed response from the agent.
+        :raises: AgentAPIError when agent failed to execute specified command.
+        :returns: A dict containing command response from agent.
+
+        """
+        return self._command(node=node,
+                             method='standby.get_partition_uuids',
+                             params={},
+                             wait=True)
+
     @METRICS.timer('AgentClient.power_off')
     def power_off(self, node):
         """Soft powers off the bare metal node by shutting down ramdisk OS.