e8bff4c1d7
Fixes bug 879044 Nova currently does not serialize access to the XenAPI session which can result in multiple (green)threads trying to use the same HTTP connection. This will typically only affect Python 2.7 which has updated xmlrpclib to try to use one HTTP connection for multiple requests. Change-Id: I101d63b822c8bf8c28674a836e4b54aa8259e1a8
339 lines
11 KiB
Python
339 lines
11 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2010 Citrix Systems, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Stubouts, mocks and fixtures for the test suite"""
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import eventlet
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import json
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import random
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from nova.virt import xenapi_conn
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from nova.virt.xenapi import fake
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from nova.virt.xenapi import volume_utils
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from nova.virt.xenapi import vm_utils
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from nova.virt.xenapi import vmops
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from nova import utils
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def stubout_instance_snapshot(stubs):
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@classmethod
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def fake_fetch_image(cls, context, session, instance, image, user,
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project, type):
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from nova.virt.xenapi.fake import create_vdi
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name_label = "instance-%s" % instance.id
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#TODO: create fake SR record
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sr_ref = "fakesr"
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vdi_ref = create_vdi(name_label=name_label, read_only=False,
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sr_ref=sr_ref, sharable=False)
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vdi_rec = session.call_xenapi("VDI.get_record", vdi_ref)
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vdi_uuid = vdi_rec['uuid']
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return [dict(vdi_type='os', vdi_uuid=vdi_uuid)]
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stubs.Set(vm_utils.VMHelper, 'fetch_image', fake_fetch_image)
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def fake_parse_xmlrpc_value(val):
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return val
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stubs.Set(xenapi_conn, '_parse_xmlrpc_value', fake_parse_xmlrpc_value)
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def fake_wait_for_vhd_coalesce(session, instance_id, sr_ref, vdi_ref,
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original_parent_uuid):
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#TODO(sirp): Should we actually fake out the data here
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return "fakeparent"
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stubs.Set(vm_utils, 'wait_for_vhd_coalesce', fake_wait_for_vhd_coalesce)
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def stubout_session(stubs, cls):
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"""Stubs out two methods from XenAPISession"""
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def fake_import(self):
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"""Stubs out get_imported_xenapi of XenAPISession"""
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fake_module = 'nova.virt.xenapi.fake'
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from_list = ['fake']
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return __import__(fake_module, globals(), locals(), from_list, -1)
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stubs.Set(xenapi_conn.XenAPISession, '_create_session',
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lambda s, url: cls(url))
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stubs.Set(xenapi_conn.XenAPISession, 'get_imported_xenapi',
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fake_import)
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def stub_out_get_target(stubs):
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"""Stubs out _get_target in volume_utils"""
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def fake_get_target(volume_id):
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return (None, None)
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stubs.Set(volume_utils, '_get_target', fake_get_target)
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def stubout_get_this_vm_uuid(stubs):
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def f():
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vms = [rec['uuid'] for ref, rec
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in fake.get_all_records('VM').iteritems()
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if rec['is_control_domain']]
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return vms[0]
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stubs.Set(vm_utils, 'get_this_vm_uuid', f)
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def stubout_stream_disk(stubs):
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def f(_1, _2, _3, _4):
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pass
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stubs.Set(vm_utils, '_stream_disk', f)
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def stubout_is_vdi_pv(stubs):
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def f(_1):
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return False
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stubs.Set(vm_utils, '_is_vdi_pv', f)
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def stubout_determine_is_pv_objectstore(stubs):
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"""Assumes VMs never have PV kernels"""
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@classmethod
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def f(cls, *args):
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return False
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stubs.Set(vm_utils.VMHelper, '_determine_is_pv_objectstore', f)
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def stubout_lookup_image(stubs):
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"""Simulates a failure in lookup image."""
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def f(_1, _2, _3, _4):
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raise Exception("Test Exception raised by fake lookup_image")
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stubs.Set(vm_utils, 'lookup_image', f)
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def stubout_fetch_image_glance_disk(stubs):
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"""Simulates a failure in fetch image_glance_disk."""
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@classmethod
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def f(cls, *args):
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raise fake.Failure("Test Exception raised by " +
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"fake fetch_image_glance_disk")
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stubs.Set(vm_utils.VMHelper, '_fetch_image_glance_disk', f)
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def stubout_create_vm(stubs):
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"""Simulates a failure in create_vm."""
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@classmethod
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def f(cls, *args):
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raise fake.Failure("Test Exception raised by " +
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"fake create_vm")
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stubs.Set(vm_utils.VMHelper, 'create_vm', f)
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def stubout_loopingcall_start(stubs):
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def fake_start(self, interval, now=True):
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self.f(*self.args, **self.kw)
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stubs.Set(utils.LoopingCall, 'start', fake_start)
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def stubout_loopingcall_delay(stubs):
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def fake_start(self, interval, now=True):
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self._running = True
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eventlet.sleep(1)
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self.f(*self.args, **self.kw)
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# This would fail before parallel xenapi calls were fixed
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assert self._running == False
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stubs.Set(utils.LoopingCall, 'start', fake_start)
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class FakeSessionForVMTests(fake.SessionBase):
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""" Stubs out a XenAPISession for VM tests """
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def __init__(self, uri):
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super(FakeSessionForVMTests, self).__init__(uri)
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def host_call_plugin(self, _1, _2, plugin, method, _5):
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# If the call is for 'copy_kernel_vdi' return None.
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if method == 'copy_kernel_vdi':
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return
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sr_ref = fake.get_all('SR')[0]
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vdi_ref = fake.create_vdi('', False, sr_ref, False)
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vdi_rec = fake.get_record('VDI', vdi_ref)
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if plugin == "glance" and method == "download_vhd":
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ret_str = json.dumps([dict(vdi_type='os',
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vdi_uuid=vdi_rec['uuid'])])
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else:
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ret_str = vdi_rec['uuid']
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return '<string>%s</string>' % ret_str
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def host_call_plugin_swap(self, _1, _2, plugin, method, _5):
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sr_ref = fake.get_all('SR')[0]
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vdi_ref = fake.create_vdi('', False, sr_ref, False)
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vdi_rec = fake.get_record('VDI', vdi_ref)
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if plugin == "glance" and method == "download_vhd":
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swap_vdi_ref = fake.create_vdi('', False, sr_ref, False)
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swap_vdi_rec = fake.get_record('VDI', swap_vdi_ref)
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ret_str = json.dumps(
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[dict(vdi_type='os', vdi_uuid=vdi_rec['uuid']),
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dict(vdi_type='swap', vdi_uuid=swap_vdi_rec['uuid'])])
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else:
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ret_str = vdi_rec['uuid']
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return '<string>%s</string>' % ret_str
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def VM_start(self, _1, ref, _2, _3):
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vm = fake.get_record('VM', ref)
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if vm['power_state'] != 'Halted':
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raise fake.Failure(['VM_BAD_POWER_STATE', ref, 'Halted',
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vm['power_state']])
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vm['power_state'] = 'Running'
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vm['is_a_template'] = False
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vm['is_control_domain'] = False
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vm['domid'] = random.randrange(1, 1 << 16)
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def VM_snapshot(self, session_ref, vm_ref, label):
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status = "Running"
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template_vm_ref = fake.create_vm(label, status, is_a_template=True,
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is_control_domain=False)
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sr_ref = "fakesr"
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template_vdi_ref = fake.create_vdi(label, read_only=True,
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sr_ref=sr_ref, sharable=False)
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template_vbd_ref = fake.create_vbd(template_vm_ref, template_vdi_ref)
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return template_vm_ref
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def VDI_destroy(self, session_ref, vdi_ref):
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fake.destroy_vdi(vdi_ref)
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def VM_destroy(self, session_ref, vm_ref):
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fake.destroy_vm(vm_ref)
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def SR_scan(self, session_ref, sr_ref):
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pass
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def VDI_set_name_label(self, session_ref, vdi_ref, name_label):
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pass
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def stub_out_vm_methods(stubs):
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def fake_shutdown(self, inst, vm, method="clean"):
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pass
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def fake_acquire_bootlock(self, vm):
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pass
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def fake_release_bootlock(self, vm):
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pass
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def fake_spawn_rescue(self, context, inst, network_info):
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inst._rescue = False
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stubs.Set(vmops.VMOps, "_shutdown", fake_shutdown)
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stubs.Set(vmops.VMOps, "_acquire_bootlock", fake_acquire_bootlock)
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stubs.Set(vmops.VMOps, "_release_bootlock", fake_release_bootlock)
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stubs.Set(vmops.VMOps, "spawn_rescue", fake_spawn_rescue)
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class FakeSessionForVolumeTests(fake.SessionBase):
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""" Stubs out a XenAPISession for Volume tests """
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def __init__(self, uri):
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super(FakeSessionForVolumeTests, self).__init__(uri)
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def VDI_introduce(self, _1, uuid, _2, _3, _4, _5,
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_6, _7, _8, _9, _10, _11):
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valid_vdi = False
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refs = fake.get_all('VDI')
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for ref in refs:
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rec = fake.get_record('VDI', ref)
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if rec['uuid'] == uuid:
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valid_vdi = True
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if not valid_vdi:
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raise fake.Failure([['INVALID_VDI', 'session', self._session]])
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class FakeSessionForVolumeFailedTests(FakeSessionForVolumeTests):
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""" Stubs out a XenAPISession for Volume tests: it injects failures """
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def __init__(self, uri):
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super(FakeSessionForVolumeFailedTests, self).__init__(uri)
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def VDI_introduce(self, _1, uuid, _2, _3, _4, _5,
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_6, _7, _8, _9, _10, _11):
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# This is for testing failure
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raise fake.Failure([['INVALID_VDI', 'session', self._session]])
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def PBD_unplug(self, _1, ref):
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rec = fake.get_record('PBD', ref)
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rec['currently-attached'] = False
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def SR_forget(self, _1, ref):
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pass
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class FakeSessionForMigrationTests(fake.SessionBase):
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"""Stubs out a XenAPISession for Migration tests"""
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def __init__(self, uri):
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super(FakeSessionForMigrationTests, self).__init__(uri)
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def VDI_get_by_uuid(self, *args):
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return 'hurr'
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def VM_start(self, _1, ref, _2, _3):
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vm = fake.get_record('VM', ref)
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if vm['power_state'] != 'Halted':
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raise fake.Failure(['VM_BAD_POWER_STATE', ref, 'Halted',
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vm['power_state']])
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vm['power_state'] = 'Running'
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vm['is_a_template'] = False
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vm['is_control_domain'] = False
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vm['domid'] = random.randrange(1, 1 << 16)
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def VM_set_name_label(self, *args):
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pass
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def VDI_set_name_label(self, session_ref, vdi_ref, name_label):
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pass
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def stub_out_migration_methods(stubs):
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def fake_create_snapshot(self, instance):
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return 'vm_ref', dict(image='foo', snap='bar')
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@classmethod
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def fake_get_vdi(cls, session, vm_ref):
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vdi_ref = fake.create_vdi(name_label='derp', read_only=False,
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sr_ref='herp', sharable=False)
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vdi_rec = session.call_xenapi("VDI.get_record", vdi_ref)
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return vdi_ref, {'uuid': vdi_rec['uuid'], }
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def fake_shutdown(self, inst, vm, hard=True):
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pass
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@classmethod
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def fake_sr(cls, session, *args):
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pass
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@classmethod
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def fake_get_sr_path(cls, *args):
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return "fake"
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def fake_destroy(*args, **kwargs):
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pass
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def fake_reset_network(*args, **kwargs):
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pass
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stubs.Set(vmops.VMOps, '_destroy', fake_destroy)
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stubs.Set(vm_utils.VMHelper, 'scan_default_sr', fake_sr)
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stubs.Set(vm_utils.VMHelper, 'scan_sr', fake_sr)
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stubs.Set(vmops.VMOps, '_create_snapshot', fake_create_snapshot)
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stubs.Set(vm_utils.VMHelper, 'get_vdi_for_vm_safely', fake_get_vdi)
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stubs.Set(xenapi_conn.XenAPISession, 'wait_for_task', lambda x, y, z: None)
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stubs.Set(vm_utils.VMHelper, 'get_sr_path', fake_get_sr_path)
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stubs.Set(vmops.VMOps, 'reset_network', fake_reset_network)
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stubs.Set(vmops.VMOps, '_shutdown', fake_shutdown)
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