Remove statsd args to OpenStack API client call

Change If21a10c56f43a121d30aa802f2c89d31df97f121 modified nodepool to
not use the inbuilt TaskManager but use openstackapi's task handling
instead.

The statsd arguments added here don't actually do anything and are
ignored; an openstack.Connection() object doesn't setup the stats
configuration.  Things are somewhat working because of the
STATSD_<HOST|PORT> environment variables -- openstacksdk notices these
and turns on stats reporting.  However, it uses the default prefix
('openstack.api') which is a regression over the previous behaviour of
logging operations on a per-cloud basis.

I have proposed the dependent-change that will allow setting the
prefix for stats in the "metric" section of each cloud in the
openstacksdk config file.  This will allow users to return to the
previous behaviour by setting each cloud with an individual prefix in
the cloud configuration (or, indeed keep the current behaviour by not
setting that).  So along with removing the ineffective arguments, I've
updated the relevant documentation and added a release note detailing
this.

Depends-On: https://review.opendev.org/c/openstack/openstacksdk/+/786814

Change-Id: I30e57084489d822dd6152d3e5712e3cd201372ae

doc/source/installation.rst

@@ -32,6 +32,13 @@ configured to send information to it.  Set the environment variable
 ``STATSD_PORT`` if this should be different to the default ``8125``)
 for the Nodepool daemon to enable this support.
 
+If using the OpenStack driver, setting these variables will enable
+``openstacksdk`` reporting.  By default, ``openstacksdk`` will report
+OpenStack API statistics prefixed with ``openstack.api``.  To override
+this, for example to report API statistics on a per-cloud basis, see
+the OpenStack SDK configuration documentation on `metrics
+<https://docs.openstack.org/openstacksdk/latest/user/guides/stats.html>`__.
+
 Install Nodepool
 ----------------
 

nodepool/driver/openstack/provider.py

@@ -16,7 +16,6 @@
 
 import logging
 import operator
-import os
 import threading
 import time
 
@@ -93,9 +92,6 @@ class OpenStackProvider(Provider, QuotaSupport):
             config=self.provider.cloud_config,
             use_direct_get=False,
             rate_limit=rate_limit,
-            statsd_host=os.getenv('STATSD_HOST', None),
-            statsd_port=os.getenv('STATSD_PORT ', None),
-            statsd_prefix='nodepool.task.{0}'.format(self.provider.name),
             app_name='nodepool',
             app_version=version.version_info.version_string()
         )

releasenotes/notes/openstack-statsd-ff1abe1a46794490.yaml

@@ -0,0 +1,14 @@
+---
+upgrade:
+  - |
+    Nodepool 0.3.6 introduced an unintended behaviour change with
+    ``openstacksdk`` ``statsd`` reporting.  Due to a change in the way
+    nodepool manages OpenStack API calls, all API related statistics
+    created during interaction with clouds are now generated by
+    ``openstacksdk`` and prefixed with ``openstack.api`` instead of
+    being created by nodepool and prefixed with
+    ``nodepool.provider.<cloud>`` as in prior versions.  If you wish
+    to revert to the prior behaviour, changes have been provided to
+    ``openstacksdk`` to allow setting custom prefixes via the cloud
+    configuration file; see `statsd documentation
+    <https://zuul-ci.org/docs/nodepool/installation.html#statsd-and-graphite>`__