81daff1818
Originally all calls were required to be async because of integration with twisted, but that has long since been changed and just using the synchronous calls is easier and less code. Change-Id: Ib86fc721326de34fd71d68bbec42ecd65280aa8a
419 lines
14 KiB
Python
419 lines
14 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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# 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 json
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import random
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from eventlet import tpool
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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_firewall_driver(stubs, conn):
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def fake_none(self, *args):
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return
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vmops = conn._vmops
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stubs.Set(vmops.firewall_driver, 'prepare_instance_filter', fake_none)
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stubs.Set(vmops.firewall_driver, 'instance_filter_exists', fake_none)
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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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return [dict(vdi_type='os', vdi_uuid=_make_fake_vdi())]
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stubs.Set(vm_utils.VMHelper, 'fetch_image', fake_fetch_image)
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def fake_wait_for_vhd_coalesce(*args):
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#TODO(sirp): Should we actually fake out the data here
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return "fakeparent", "fakebase"
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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, product_version=None, **opt_args):
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"""Stubs out three 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, **opt_args))
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stubs.Set(xenapi_conn.XenAPISession, 'get_imported_xenapi',
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fake_import)
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if product_version is None:
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product_version = (5, 6, 2)
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stubs.Set(xenapi_conn.XenAPISession, 'get_product_version',
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lambda s: product_version)
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# NOTE(johannes): logging can't be used reliably from a thread
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# since it can deadlock with eventlet. It's safe for our faked
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# sessions to be called synchronously in the unit tests. (see
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# bug 946687)
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stubs.Set(tpool, 'execute', lambda m, *a, **kw: m(*a, **kw))
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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 stu 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_is_snapshot(stubs):
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""" Always returns true
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xenapi fake driver does not create vmrefs for snapshots """
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@classmethod
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def f(cls, *args):
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return True
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stubs.Set(vm_utils.VMHelper, 'is_snapshot', 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, raise_failure=False):
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"""Simulates a failure in fetch image_glance_disk."""
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@classmethod
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def _fake_fetch_image_glance_disk(cls, context, session, instance, image,
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image_type):
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if raise_failure:
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raise fake.Failure("Test Exception raised by "
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"fake fetch_image_glance_disk")
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elif image_type == vm_utils.ImageType.KERNEL:
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filename = "kernel"
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elif image_type == vm_utils.ImageType.RAMDISK:
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filename = "ramdisk"
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else:
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filename = "unknown"
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return [dict(vdi_type=vm_utils.ImageType.to_string(image_type),
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vdi_uuid=None,
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file=filename)]
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stubs.Set(vm_utils.VMHelper, '_fetch_image_glance_disk',
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_fake_fetch_image_glance_disk)
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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 _make_fake_vdi():
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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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return vdi_rec['uuid']
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class FakeSessionForVMTests(fake.SessionBase):
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""" Stubs out a XenAPISession for VM tests """
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_fake_iptables_save_output = ("# Generated by iptables-save v1.4.10 on "
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"Sun Nov 6 22:49:02 2011\n"
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"*filter\n"
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":INPUT ACCEPT [0:0]\n"
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":FORWARD ACCEPT [0:0]\n"
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":OUTPUT ACCEPT [0:0]\n"
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"COMMIT\n"
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"# Completed on Sun Nov 6 22:49:02 2011\n")
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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 (plugin, method) == ('glance', 'download_vhd'):
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return fake.as_json(dict(vdi_type='os',
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vdi_uuid=_make_fake_vdi()))
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elif (plugin, method) == ("xenhost", "iptables_config"):
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return fake.as_json(out=self._fake_iptables_save_output,
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err='')
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else:
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return (super(FakeSessionForVMTests, self).
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host_call_plugin(_1, _2, plugin, method, _5))
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def host_call_plugin_swap(self, _1, _2, plugin, method, _5):
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if (plugin, method) == ('glance', 'download_vhd'):
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return fake.as_json(dict(vdi_type='os',
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vdi_uuid=_make_fake_vdi()),
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dict(vdi_type='swap',
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vdi_uuid=_make_fake_vdi()))
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else:
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return (super(FakeSessionForVMTests, self).
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host_call_plugin(_1, _2, plugin, method, _5))
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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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return vm
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def VM_start_on(self, _1, vm_ref, host_ref, _2, _3):
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vm_rec = self.VM_start(_1, vm_ref, _2, _3)
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vm_rec['resident_on'] = host_ref
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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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class FakeSessionForFirewallTests(FakeSessionForVMTests):
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""" Stubs out a XenApi Session for doing IPTable Firewall tests """
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def __init__(self, uri, test_case=None):
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super(FakeSessionForFirewallTests, self).__init__(uri)
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if hasattr(test_case, '_in_filter_rules'):
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self._in_filter_rules = test_case._in_filter_rules
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if hasattr(test_case, '_in6_filter_rules'):
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self._in6_filter_rules = test_case._in6_filter_rules
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if hasattr(test_case, '_in_nat_rules'):
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self._in_nat_rules = test_case._in_nat_rules
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self._test_case = test_case
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def host_call_plugin(self, _1, _2, plugin, method, args):
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"""Mock method four host_call_plugin to be used in unit tests
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for the dom0 iptables Firewall drivers for XenAPI
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"""
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if plugin == "xenhost" and method == "iptables_config":
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# The command to execute is a json-encoded list
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cmd_args = args.get('cmd_args', None)
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cmd = json.loads(cmd_args)
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if not cmd:
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ret_str = ''
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else:
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output = ''
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process_input = args.get('process_input', None)
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if cmd == ['ip6tables-save', '-t', 'filter']:
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output = '\n'.join(self._in6_filter_rules)
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if cmd == ['iptables-save', '-t', 'filter']:
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output = '\n'.join(self._in_filter_rules)
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if cmd == ['iptables-save', '-t', 'nat']:
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output = '\n'.join(self._in_nat_rules)
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if cmd == ['iptables-restore', ]:
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lines = process_input.split('\n')
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if '*filter' in lines:
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if self._test_case is not None:
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self._test_case._out_rules = lines
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output = '\n'.join(lines)
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if cmd == ['ip6tables-restore', ]:
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lines = process_input.split('\n')
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if '*filter' in lines:
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output = '\n'.join(lines)
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ret_str = fake.as_json(out=output, err='')
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return ret_str
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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, image_meta):
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inst._rescue = False
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@classmethod
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def fake_generate_ephemeral(cls, *args):
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pass
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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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stubs.Set(vm_utils.VMHelper, 'generate_ephemeral', fake_generate_ephemeral)
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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(FakeSessionForVMTests):
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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_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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@classmethod
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def fake_generate_ephemeral(cls, *args):
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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(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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stubs.Set(vm_utils.VMHelper, 'generate_ephemeral', fake_generate_ephemeral)
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