Balazs Gibizer 40c97d7346 Add support for osprofiler in wsgi
To use osprofiler with placement:

* Add a [profiler] section to the placement.conf (and other openstack
  service conf files):

  [profiler]
  connection_string = mysql+pymysql://root:admin@127.0.0.1/osprofiler?charset=utf8
  hmac_keys = my-secret-key
  trace_sqlalchemy = True
  enabled = True

* Include the hmac_keys in your API request

  $ openstack server create --flavor c1 --image cirros-0.4.0-x86_64-disk \
    --os-profile my-secret-key vm --wait

  The openstack client will return the trace id:

  Trace ID: 67428cdd-bfaa-496f-b430-507165729246
  $

* Extrace the trace in html format

  $ osprofiler trace show --html 67428cdd-bfaa-496f-b430-507165729246 \
    --connection-string mysql+pymysql://root:admin@127.0.0.1/osprofiler?charset=utf8

Here is an example trace output for the above server create request
including the placement interactions enabled by this patch:
https://pste.eu/p/ZFsb.html

Story: 2005842
Task: 33616

Change-Id: I5a0e805fe04c00c5e7cf316f0ea8d432b940e560
2019-06-20 13:53:19 +00:00
..