openstack
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nova
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nova/nova/tests/functional/regressions
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Matt Riedemann 25dadb94db Remove the CachingScheduler 
The CachingScheduler has been deprecated since Pike [1].
It does not use the placement service and as more of nova
relies on placement for managing resource allocations,
maintaining compabitility for the CachingScheduler is
exorbitant.

The release note in this change goes into much more detail
about why the FilterScheduler + Placement should be a
sufficient replacement for the original justification
for the CachingScheduler along with details on how to migrate
from the CachingScheduler to the FilterScheduler.

Since the [scheduler]/driver configuration option does allow
loading out-of-tree drivers and the scheduler driver interface
does have the USES_ALLOCATION_CANDIDATES variable, it is
possible that there are drivers being used which are also not
using the placement service. The release note also explains this
but warns against it. However, as a result some existing
functional tests, which were using the CachingScheduler, are
updated to still test scheduling without allocations being
created in the placement service.

Over time we will likely remove the USES_ALLOCATION_CANDIDATES
variable in the scheduler driver interface along with the
compatibility code associated with it, but that is left for
a later change.

[1] Ia7ff98ff28b7265058845e46b277317a2bfc96d2

Change-Id: I1832da2190be5ef2b04953938860a56a43e8cddf
 		2018-10-18 17:55:36 -04:00
..
README.rst add a place for functional test to block specific regressions 2016-02-24 18:14:27 +00:00
__init__.py add a place for functional test to block specific regressions 2016-02-24 18:14:27 +00:00
test_bug_1404867.py Remove old check_attach version check in API 2018-08-29 16:26:25 -04:00
test_bug_1522536.py replace chance with filter scheduler in func tests 2017-08-16 14:42:51 +00:00
test_bug_1541691.py Remove unused conf 2016-09-02 09:02:23 +08:00
test_bug_1548980.py replace chance with filter scheduler in func tests 2017-08-16 14:42:51 +00:00
test_bug_1552888.py Trivial-Fix: Fix typos 2016-06-13 06:41:08 +00:00
test_bug_1554631.py Catching OverQuota Exception 2017-05-03 19:00:34 +00:00
test_bug_1558866.py remove unnecessary conf imports 2018-03-09 14:30:10 -05:00
test_bug_1568208.py Fix generation of Guru Meditation Report 2016-04-13 17:00:32 +03:00
test_bug_1595962.py libvirt: Remove usage of migrateToURI{2} APIs 2018-07-31 18:57:28 +02:00
test_bug_1620248.py Stop using mox stubs in cast_as_call.py 2017-07-25 00:40:41 +00:00
test_bug_1670627.py Clean up ports and volumes when deleting ERROR instance 2018-02-20 10:32:07 -05:00
test_bug_1671648.py Remove the CachingScheduler 2018-10-18 17:55:36 -04:00
test_bug_1675570.py Implement new attach Cinder flow 2017-12-07 10:29:15 -05:00
test_bug_1678326.py Commit usage decrement after destroying instance 2017-04-05 15:19:15 -04:00
test_bug_1679750.py Cleanup ugly stub in TestLocalDeleteAllocations 2018-05-16 09:23:55 -04:00
test_bug_1682693.py replace chance with filter scheduler in func tests 2017-08-16 14:42:51 +00:00
test_bug_1689692.py Clean up ports and volumes when deleting ERROR instance 2018-02-20 10:32:07 -05:00
test_bug_1702454.py Functional regression test for evacuate with a target 2017-10-29 13:49:06 -04:00
test_bug_1713783.py Set server status to ERROR if rebuild failed 2018-01-23 11:39:45 -05:00
test_bug_1718455.py Ensure instance can migrate when launched concurrently 2017-09-28 11:40:54 -04:00
test_bug_1718512.py Fix race fail in test_resize_with_reschedule_then_live_migrate 2018-04-11 10:43:34 -04:00
test_bug_1719730.py Set group_members when converting to legacy request spec 2017-09-27 20:52:19 +00:00
test_bug_1732947.py Implement new attach Cinder flow 2017-12-07 10:29:15 -05:00
test_bug_1735407.py Skip test_parallel_evacuate_with_server_group until fixed 2018-10-03 11:42:15 -04:00
test_bug_1741125.py Remove the CachingScheduler 2018-10-18 17:55:36 -04:00
test_bug_1741307.py Remove the CachingScheduler 2018-10-18 17:55:36 -04:00
test_bug_1746483.py Handle volume-backed instances in IsolatedHostsFilter 2018-02-11 17:23:38 -05:00
test_bug_1746509.py Use nova.db.api directly 2018-07-10 14:56:27 +00:00
test_bug_1764883.py compute: Ensure pre-migrating instances are destroyed during init_host 2018-07-20 15:46:25 -04:00
test_bug_1780373.py Fix server_group_members quota check 2018-07-06 16:57:31 -04:00
test_bug_1781710.py Update RequestSpec.instance_uuid during scheduling 2018-07-19 14:50:09 -04:00

README.rst

Tests for Specific Regressions

When we have a bug reported by end users that we can write a full stack reproduce on, we should. And we should keep a regression test for that bug in our tree. It can be deleted at some future date if needed, but largely should not be changed.

Writing Regression Tests

  • These should be full stack tests which inherit from nova.test.TestCase directly. (This is to prevent coupling with other tests).
  • They should setup a full stack cloud in their setUp via fixtures
  • They should each live in a file which is named test_bug######.py

Writing Tests Before the Bug is Fixed

TODO describe writing and landing tests before the bug is fixed as a reproduce.