From 6a54f66de2d4dbe4110a86f83afac67c017ed895 Mon Sep 17 00:00:00 2001
From: yuanyue <yyuanyuee@163.com>
Date: Thu, 6 Jul 2017 17:34:41 -0700
Subject: [PATCH] Add log info in scheduler to mark start of scheduling

This patch adds log info in nova-scheduler to show
whether and when scheduler begins to handle schedule
task for instances. We always want to know the very
start point in order to debug, analyse and optimize
the schedule process.

Change-Id: Ibe5c49813d85f26870dea1d971aeeb0c7ff7a3cd
---
 nova/scheduler/manager.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nova/scheduler/manager.py b/nova/scheduler/manager.py
index b38d12c18a20..473be221ad6b 100644
--- a/nova/scheduler/manager.py
+++ b/nova/scheduler/manager.py
@@ -100,6 +100,7 @@ class SchedulerManager(manager.Manager):
         The result should be a list of dicts with 'host', 'nodename' and
         'limits' as keys.
         """
+        LOG.debug("Starting to schedule for instances: %s", instance_uuids)
 
         # TODO(sbauza): Change the method signature to only accept a spec_obj
         # argument once API v5 is provided.