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Added fixes and readme for the feature

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This commit is contained in:
Roman Dobosz
2018-02-23 13:36:12 +01:00
parent b0cd31de21
commit 7c2f00d09d
10 changed files with 546 additions and 12 deletions
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170
affinity_ocata/nova/0005-Added-node-field-for-InstanceGroup-objects.patch Normal file
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@@ -0,0 +1,170 @@
From 9014195f11d981da4dc158ab9b9b6bb594c8ea0d Mon Sep 17 00:00:00 2001
From: Roman Dobosz <roman.dobosz@intel.com>
Date: Fri, 23 Feb 2018 07:26:05 +0100
Subject: [PATCH 5/8] Added node field for InstanceGroup objects
Currently, there is only a way for getting the information which hosts
belongs for certain instance group. By 'hosts' it means a hostname, on
which compute service is running. In case of bare metal instances, there
is no way to get the information out of instance group object which
ironic nodes are belonging for such group. This patch adds an ability
for fetching such information.
InstanceGroup class now have new field - nodes - and corresponding method
get_nodes, to gather information about nodes out of instance objects. Also
request spec object was updated to reset new InstanceGroup nodes field during
group population.
---
nova/objects/instance_group.py | 34 ++++++++++++++++++++-----
nova/objects/request_spec.py | 5 ++--
nova/tests/functional/db/test_instance_group.py | 2 +-
nova/tests/unit/objects/test_instance_group.py | 6 +++--
nova/tests/unit/objects/test_objects.py | 2 +-
5 files changed, 37 insertions(+), 12 deletions(-)
diff --git a/nova/objects/instance_group.py b/nova/objects/instance_group.py
index 2be47278b2..142fff6128 100644
--- a/nova/objects/instance_group.py
+++ b/nova/objects/instance_group.py
@@ -32,7 +32,7 @@ from nova.objects import base
from nova.objects import fields
-LAZY_LOAD_FIELDS = ['hosts']
+LAZY_LOAD_FIELDS = ['hosts', 'nodes']
def _instance_group_get_query(context, id_field=None, id=None):
@@ -124,7 +124,8 @@ class InstanceGroup(base.NovaPersistentObject, base.NovaObject,
# Version 1.9: Add get_by_instance_uuid()
# Version 1.10: Add hosts field
# Version 1.11: Add get_aggregate_uuids()
- VERSION = '1.11'
+ # Version 1.12: Add nodes field
+ VERSION = '1.12'
fields = {
'id': fields.IntegerField(),
@@ -138,6 +139,7 @@ class InstanceGroup(base.NovaPersistentObject, base.NovaObject,
'policies': fields.ListOfStringsField(nullable=True),
'members': fields.ListOfStringsField(nullable=True),
'hosts': fields.ListOfStringsField(nullable=True),
+ 'nodes': fields.ListOfStringsField(nullable=True),
}
def obj_make_compatible(self, primitive, target_version):
@@ -283,12 +285,13 @@ class InstanceGroup(base.NovaPersistentObject, base.NovaObject,
def obj_load_attr(self, attrname):
# NOTE(sbauza): Only hosts could be lazy-loaded right now
- if attrname != 'hosts':
+ if attrname not in LAZY_LOAD_FIELDS:
raise exception.ObjectActionError(
action='obj_load_attr', reason='unable to load %s' % attrname)
self.hosts = self.get_hosts()
- self.obj_reset_changes(['hosts'])
+ self.nodes = self.get_nodes()
+ self.obj_reset_changes(LAZY_LOAD_FIELDS)
@base.remotable_classmethod
def get_by_uuid(cls, context, uuid):
@@ -348,8 +351,9 @@ class InstanceGroup(base.NovaPersistentObject, base.NovaObject,
# field explicitly, we prefer to raise an Exception so the developer
# knows he has to call obj_reset_changes(['hosts']) right after setting
# the field.
- if 'hosts' in updates:
- raise exception.InstanceGroupSaveException(field='hosts')
+ for attribute in LAZY_LOAD_FIELDS:
+ if attribute in updates:
+ raise exception.InstanceGroupSaveException(field=attribute)
if not updates:
return
@@ -456,6 +460,24 @@ class InstanceGroup(base.NovaPersistentObject, base.NovaObject,
return list(set([instance.host for instance in instances
if instance.host]))
+ @base.remotable
+ def get_nodes(self, exclude=None):
+ """Get a list of nodes for non-deleted instances in the group
+
+ This method allows you to get a list of the (ironic) hosts where
+ instances in this group are currently running. There's also an option
+ to exclude certain instance UUIDs from this calculation.
+
+ """
+ filter_uuids = self.members
+ if exclude:
+ filter_uuids = set(filter_uuids) - set(exclude)
+ filters = {'uuid': filter_uuids, 'deleted': False}
+ instances = objects.InstanceList.get_by_filters(self._context,
+ filters=filters)
+ return list(set([instance.node for instance in instances
+ if instance.node]))
+
@base.remotable
def get_aggregate_uuids(self, exclude=None):
"""Returns a set of aggregate UUIDs associated with all compute nodes
diff --git a/nova/objects/request_spec.py b/nova/objects/request_spec.py
index 9040735153..24eaef9327 100644
--- a/nova/objects/request_spec.py
+++ b/nova/objects/request_spec.py
@@ -200,8 +200,9 @@ class RequestSpec(base.NovaObject):
self.instance_group = objects.InstanceGroup(policies=policies,
hosts=hosts,
members=members)
- # hosts has to be not part of the updates for saving the object
- self.instance_group.obj_reset_changes(['hosts'])
+ # hosts and nodes cannot be a part of the updates for saving the
+ # object
+ self.instance_group.obj_reset_changes(['hosts', 'nodes'])
else:
# Set the value anyway to avoid any call to obj_attr_is_set for it
self.instance_group = None
diff --git a/nova/tests/functional/db/test_instance_group.py b/nova/tests/functional/db/test_instance_group.py
index b4c7ef3fd8..3c608b929f 100644
--- a/nova/tests/functional/db/test_instance_group.py
+++ b/nova/tests/functional/db/test_instance_group.py
@@ -221,7 +221,7 @@ class InstanceGroupObjectTestCase(test.TestCase):
api_models = sorted(api_models, key=key_func)
orig_main_models = sorted(orig_main_models, key=key_func)
ignore_fields = ('id', 'hosts', 'deleted', 'deleted_at', 'created_at',
- 'updated_at')
+ 'updated_at', 'nodes')
for i in range(len(api_models)):
for field in instance_group.InstanceGroup.fields:
if field not in ignore_fields:
diff --git a/nova/tests/unit/objects/test_instance_group.py b/nova/tests/unit/objects/test_instance_group.py
index 8da6712f6e..37a71b57ce 100644
--- a/nova/tests/unit/objects/test_instance_group.py
+++ b/nova/tests/unit/objects/test_instance_group.py
@@ -271,8 +271,10 @@ class _TestInstanceGroupObject(object):
@mock.patch.object(objects.InstanceList, 'get_by_filters')
def test_load_hosts(self, mock_get_by_filt):
- mock_get_by_filt.return_value = [objects.Instance(host='host1'),
- objects.Instance(host='host2')]
+ mock_get_by_filt.return_value = [objects.Instance(host='host1',
+ node='node1'),
+ objects.Instance(host='host2',
+ node='node2')]
obj = objects.InstanceGroup(self.context, members=['uuid1'])
self.assertEqual(2, len(obj.hosts))
diff --git a/nova/tests/unit/objects/test_objects.py b/nova/tests/unit/objects/test_objects.py
index a577820d0c..f80182357c 100644
--- a/nova/tests/unit/objects/test_objects.py
+++ b/nova/tests/unit/objects/test_objects.py
@@ -1106,7 +1106,7 @@ object_data = {
'InstanceExternalEvent': '1.1-6e446ceaae5f475ead255946dd443417',
'InstanceFault': '1.2-7ef01f16f1084ad1304a513d6d410a38',
'InstanceFaultList': '1.2-6bb72de2872fe49ded5eb937a93f2451',
- 'InstanceGroup': '1.11-bdd9fa6ab3c80e92fd43b3ba5393e368',
+ 'InstanceGroup': '1.12-4eaaffc4d20d0901cd0cfaef9e8a41cd',
'InstanceGroupList': '1.7-be18078220513316abd0ae1b2d916873',
'InstanceInfoCache': '1.5-cd8b96fefe0fc8d4d337243ba0bf0e1e',
'InstanceList': '2.2-ff71772c7bf6d72f6ef6eee0199fb1c9',
--
2.16.1