Add support for Guru Meditation Reports for VPNaaS agents

Added oslo.reports dependency since now we explicitly require it.

Change-Id: I57ebb5acc487517b5c475d6e55a839d83bc2b37b
Implements: blueprint guru-meditation-report

neutron_vpnaas/cmd/__init__.py

@@ -0,0 +1,26 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import logging as sys_logging
+
+from oslo_reports import guru_meditation_report as gmr
+
+from neutron_vpnaas import version
+
+# During the call to gmr.TextGuruMeditation.setup_autorun(), Guru Meditation
+# Report tries to start logging. Set a handler here to accommodate this.
+logger = sys_logging.getLogger(None)
+if not logger.handlers:
+    logger.addHandler(sys_logging.StreamHandler())
+
+_version_string = version.version_info.release_string()
+gmr.TextGuruMeditation.setup_autorun(version=_version_string)

releasenotes/notes/oslo-reports-3059c2e10e1b35b5.yaml

@@ -0,0 +1,6 @@
+---
+prelude: >
+    Neutron VPNaaS is integrated with Guru Meditation Reports library.
+features:
+  - Neutron VPNaaS services should respond to SIGUSR2 signal by dumping
+    valuable debug information to standard error output.

requirements.txt

@@ -15,6 +15,7 @@ oslo.config>=3.10.0 # Apache-2.0
 oslo.db>=4.1.0 # Apache-2.0
 oslo.log>=1.14.0 # Apache-2.0
 oslo.messaging>=5.2.0 # Apache-2.0
+oslo.reports>=0.6.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.service>=1.10.0 # Apache-2.0
 oslo.utils>=3.11.0 # Apache-2.0