openstack/nova
Code Issues Proposed changes

Set TrustedFilter as experimental

Browse Source 
The TrustedFilter is the only in-tree scheduler filter that calls an external
3rd-party service (OpenAttestation) for decision-making. Thus, the OAT service
is not listed as an official Nova dependency and consequently not even gated,
even by a 3rd-party CI.

Besides, some discussions have been captured in a ML thread that show that
running this filter is not the best way for enforcing trusted compute nodes [1]
but I leave that out of the review (just a FYI) because the main reason for
making experimental the filter is to send a signal to operators that they will
either have to find another solution or accept the current gaps.

[1] http://lists.openstack.org/pipermail/openstack-dev/2015-June/067766.html

Related-Bug: #1456228

Change-Id: I6ab013faf22a0e88424207830ec399724f827622
This commit is contained in:
Sylvain Bauza
2015-09-18 12:38:12 +02:00
committed by Matt Riedemann
parent 5d34c572cb
commit e134536d0a
2 changed files with 9 additions and 2 deletions
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2
doc/source/filter_scheduler.rst
View File

@@ -137,7 +137,7 @@ There are some standard filter classes to use (:mod:`nova.scheduler.filters`):
a set of instances.
* |RetryFilter| - filters hosts that have been attempted for scheduling.
Only passes hosts that have not been previously attempted.
* |TrustedFilter| - filters hosts based on their trust. Only passes hosts
* |TrustedFilter| (EXPERIMENTAL) - filters hosts based on their trust. Only passes hosts
that meet the trust requirements specified in the instance properties.
* |TypeAffinityFilter| - Only passes hosts that are not already running an
instance of the requested type.

9
nova/scheduler/filters/trusted_filter.py
View File

@@ -15,7 +15,7 @@
# under the License.
"""
Filter to add support for Trusted Computing Pools.
Filter to add support for Trusted Computing Pools (EXPERIMENTAL).
Filter that only schedules tasks on a host if the integrity (trust)
of that host matches the trust requested in the ``extra_specs`` for the
@@ -50,6 +50,7 @@ from oslo_utils import timeutils
import requests
from nova import context
from nova.i18n import _LW
from nova import objects
from nova.scheduler import filters
@@ -254,6 +255,12 @@ class TrustedFilter(filters.BaseHostFilter):
def __init__(self):
self.compute_attestation = ComputeAttestation()
LOG.warning(_LW('The TrustedFilter is considered experimental '
'by the OpenStack project because it receives much '
'less testing than the rest of Nova. This may change '
'in the future, but current deployers should be aware '
'that the use of it in production right now may be '
'risky.'))
# The hosts the instances are running on doesn't change within a request
run_filter_once_per_request = True