Add "__repr__" method to class "Service"

The class "Service" doesn't have a "__repr__" method which results
in log outputs like:

    DEBUG [...] service = <nova.service.Service object at 0x56eb890>

This is not helpful when analyzing logs. Therefore this change adds a
"__repr__" method.

Change-Id: I49c8b7f0dde298de780808c988e4b50278eed665

1 files changed, 9 insertions, 0 deletions

diff --git a/nova/service.py b/nova/service.py
index dc40de4a0c..9810ce275d 100644
--- a/nova/service.py
+++ b/nova/service.py
@@ -110,6 +110,15 @@ class Service(service.Service):
         self.conductor_api = conductor.API(use_local=db_allowed)
         self.conductor_api.wait_until_ready(context.get_admin_context())
 
+    def __repr__(self):
+        return "<%(cls_name)s: host=%(host)s, binary=%(binary)s, " \
+               "manager_class_name=%(manager)s>" % {
+                 'cls_name': self.__class__.__name__,
+                 'host': self.host,
+                 'binary': self.binary,
+                 'manager': self.manager_class_name
+                }
+
     def start(self):
         verstr = version.version_string_with_package()
         LOG.info(_LI('Starting %(topic)s node (version %(version)s)'),