358 lines
12 KiB
Python
358 lines
12 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 pickle
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import random
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from nova.openstack.common import jsonutils
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from nova import test
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import nova.tests.image.fake
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from nova.virt.xenapi import driver as xenapi_conn
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from nova.virt.xenapi import fake
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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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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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def fake_fetch_image(context, session, instance, name_label, image, type):
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return {'root': dict(uuid=_make_fake_vdi(), file=None),
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'kernel': dict(uuid=_make_fake_vdi(), file=None),
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'ramdisk': dict(uuid=_make_fake_vdi(), file=None)}
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stubs.Set(vm_utils, '_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=(5, 6, 2),
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product_brand='XenServer', **opt_args):
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"""Stubs out methods from XenAPISession."""
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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_product_version_and_brand',
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lambda s: (product_version, product_brand))
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def stubout_get_this_vm_uuid(stubs):
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def f(session):
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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_image_service_download(stubs):
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def fake_download(*args, **kwargs):
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pass
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stubs.Set(nova.tests.image.fake._FakeImageService,
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'download', fake_download)
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def stubout_stream_disk(stubs):
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def fake_stream_disk(*args, **kwargs):
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pass
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stubs.Set(vm_utils, '_stream_disk', fake_stream_disk)
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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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def f(*args):
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return False
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stubs.Set(vm_utils, '_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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"""
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def f(*args):
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return True
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stubs.Set(vm_utils, '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_disk_image(stubs, raise_failure=False):
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"""Simulates a failure in fetch image_glance_disk."""
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def _fake_fetch_disk_image(context, session, instance, name_label, 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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vdi_type = vm_utils.ImageType.to_string(image_type)
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return {vdi_type: dict(uuid=None, file=filename)}
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stubs.Set(vm_utils, '_fetch_disk_image', _fake_fetch_disk_image)
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def stubout_create_vm(stubs):
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"""Simulates a failure in create_vm."""
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def f(*args):
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raise fake.Failure("Test Exception raised by fake create_vm")
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stubs.Set(vm_utils, 'create_vm', f)
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def stubout_attach_disks(stubs):
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"""Simulates a failure in _attach_disks."""
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def f(*args):
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raise fake.Failure("Test Exception raised by fake _attach_disks")
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stubs.Set(vmops.VMOps, '_attach_disks', f)
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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('', sr_ref)
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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 host_call_plugin(self, _1, _2, plugin, method, _5):
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if (plugin, method) == ('glance', 'download_vhd'):
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root_uuid = _make_fake_vdi()
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return pickle.dumps(dict(root=dict(uuid=root_uuid)))
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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 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 VDI_snapshot(self, session_ref, vm_ref, _1):
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sr_ref = "fakesr"
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return fake.create_vdi('fakelabel', sr_ref, read_only=True)
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def SR_scan(self, session_ref, sr_ref):
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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_rules'):
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self._in_rules = test_case._in_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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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 = jsonutils.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', '-c']:
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output = '\n'.join(self._in6_filter_rules)
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if cmd == ['iptables-save', '-c']:
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output = '\n'.join(self._in_rules)
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if cmd == ['iptables-restore', '-c', ]:
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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', '-c', ]:
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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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else:
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return (super(FakeSessionForVMTests, self).
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host_call_plugin(_1, _2, plugin, method, args))
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def stub_out_vm_methods(stubs):
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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_generate_ephemeral(*args):
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pass
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def fake_wait_for_device(dev):
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pass
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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(vm_utils, 'generate_ephemeral', fake_generate_ephemeral)
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stubs.Set(vm_utils, '_wait_for_device', fake_wait_for_device)
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class FakeSessionForVolumeTests(fake.SessionBase):
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"""Stubs out a XenAPISession for Volume tests."""
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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 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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def stub_out_migration_methods(stubs):
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fakesr = fake.create_sr()
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def fake_move_disks(self, instance, disk_info):
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vdi_ref = fake.create_vdi(instance['name'], fakesr)
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vdi_rec = fake.get_record('VDI', vdi_ref)
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vdi_rec['other_config']['nova_disk_type'] = 'root'
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return {'uuid': vdi_rec['uuid'], 'ref': vdi_ref}
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def fake_wait_for_instance_to_start(self, *args):
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pass
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def fake_get_vdi(session, vm_ref):
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vdi_ref_parent = fake.create_vdi('derp-parent', fakesr)
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vdi_rec_parent = fake.get_record('VDI', vdi_ref_parent)
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vdi_ref = fake.create_vdi('derp', fakesr,
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sm_config={'vhd-parent': vdi_rec_parent['uuid']})
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vdi_rec = session.call_xenapi("VDI.get_record", vdi_ref)
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return vdi_ref, vdi_rec
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def fake_sr(session, *args):
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return fakesr
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def fake_get_sr_path(*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_generate_ephemeral(*args):
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pass
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stubs.Set(vmops.VMOps, '_destroy', fake_destroy)
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stubs.Set(vmops.VMOps, '_wait_for_instance_to_start',
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fake_wait_for_instance_to_start)
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stubs.Set(vm_utils, 'move_disks', fake_move_disks)
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stubs.Set(vm_utils, 'scan_default_sr', fake_sr)
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stubs.Set(vm_utils, 'get_vdi_for_vm_safely', fake_get_vdi)
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stubs.Set(vm_utils, 'get_sr_path', fake_get_sr_path)
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stubs.Set(vm_utils, 'generate_ephemeral', fake_generate_ephemeral)
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class FakeSessionForFailedMigrateTests(FakeSessionForVMTests):
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def VM_assert_can_migrate(self, session, vmref, migrate_data,
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live, vdi_map, vif_map, options):
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raise fake.Failure("XenAPI VM.assert_can_migrate failed")
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def host_migrate_receive(self, session, hostref, networkref, options):
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raise fake.Failure("XenAPI host.migrate_receive failed")
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def VM_migrate_send(self, session, vmref, migrate_data, islive, vdi_map,
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vif_map, options):
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raise fake.Failure("XenAPI VM.migrate_send failed")
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class XenAPITestBase(test.TestCase):
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def setUp(self):
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super(XenAPITestBase, self).setUp()
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self.useFixture(test.ReplaceModule('XenAPI', fake))
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fake.reset()
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