Support Guru in uwsgi way

Now Mogan can support the uwsgi, so should support Guru report
in uwsgi way.

Change-Id: I2724b67cf2817ed76d5f2dee2e9683b011ec9943
Implements: blueprint support-guru-in-uwsgi

doc/source/dev/gmr.rst

@@ -55,6 +55,10 @@ For example, suppose that ``mogan-api`` was run with
 Then, ``touch /tmp/guru_report`` will trigger the Guru Meditation report to be
 printed to ``/var/log/mogan/mogan-api-err.log``.
 
+For uwsgi mode, Guru is only working in second way, so user should use the
+'touch' file to generate the Guru report.
+
+
 Structure of a GMR
 ------------------
 

mogan/api/app.py

@@ -15,12 +15,15 @@
 import sys
 
 from oslo_config import cfg
+from oslo_reports import guru_meditation_report as gmr
+from oslo_reports import opts as gmr_opts
 import pecan
 
 from mogan.api import config
 from mogan.api import hooks
 from mogan.api import middleware
 from mogan.api.middleware import auth_token
+from mogan import version
 
 
 def get_pecan_config():
@@ -34,6 +37,9 @@ def setup_app(pecan_config=None, extra_hooks=None):
         pecan_config = get_pecan_config()
     pecan.configuration.set_config(dict(pecan_config), overwrite=True)
 
+    gmr_opts.set_defaults(cfg.CONF)
+    gmr.TextGuruMeditation.setup_autorun(version, conf=cfg.CONF)
+
     app_hooks = [hooks.ConfigHook(),
                  hooks.DBHook(),
                  hooks.EngineAPIHook(),

requirements.txt

@@ -22,6 +22,7 @@ oslo.log>=3.22.0 # Apache-2.0
 oslo.messaging!=5.25.0,>=5.24.2 # Apache-2.0
 oslo.middleware>=3.27.0 # Apache-2.0
 oslo.policy>=1.23.0 # Apache-2.0
+oslo.reports>=0.6.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=1.10.0 # Apache-2.0
 oslo.service>=1.10.0 # Apache-2.0
 oslo.utils>=3.20.0 # Apache-2.0

tools/config/mogan-config-generator.conf

@@ -8,6 +8,7 @@ namespace = oslo.middleware.cors
 namespace = oslo.concurrency
 namespace = oslo.policy
 namespace = oslo.log
+namespace = oslo.reports
 namespace = oslo.service.service
 namespace = oslo.service.periodic_task
 namespace = oslo.service.sslutils