mirror of
https://github.com/retspen/webvirtcloud
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bdc8a6755c
Tests that build vrtManager objects and touch no view, form or model of an app lived in that app; vrtManager/tests already holds such tests, so the convention was split. They move to vrtManager/tests: the firmware, CPU mode and PCIe port definitions of a new VM (test_create), USB and PCI host devices, the console listener, host CPU reads, interface reads, deletes and XML, network filters, PCI passthrough rules, node devices, network changes, addresses and leases, pool XML, secrets, and the live tests that use vrtManager only (disk resize, ISO, snapshots, XML, live clone). livetest.py, the live-test helper six apps import, and the network test driver move with them. Others go to their app: the quota with a host down to instances, the 401/403 Logs rows (webvirtcloud's middleware) to webvirtcloud, the VM page's tab script test to instances, novncd's own tests out of the console views tests, the compute lock and input validation tests out of the computes views tests, the interface views out of the forms tests. instances/tests/test_views.py, entirely live, is test_live_views.py. Test modules imported fixtures from each other; shared ones are now in vrtManager/tests/fakes.py (migration fakes, node devices, IOMMU groups, leases, a NAT network, a Ceph secret), interfaces/tests/fakes.py, console/tests/daemons.py (novncd loaded once), livetest.wait_for and instances/tests/create_page.BODY. Every live test checks livetest.enabled(). The suite runs the same 2097 tests.
195 lines
9.4 KiB
Python
195 lines
9.4 KiB
Python
"""Live checks for external snapshots on libvirt's own API. Runs only with
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TEST_LIBVIRT_HOST set (see vrtManager/tests/livetest.py)."""
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import os
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import unittest
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import libvirt
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from django.test import SimpleTestCase
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from lxml import etree
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from vrtManager import util
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from vrtManager.connection import connection_manager
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from vrtManager.instance import wvmInstance
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from vrtManager.tests import livetest
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P = livetest.PREFIX
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class LiveExternalSnapshotTestCase(SimpleTestCase):
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@classmethod
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def setUpClass(cls):
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if not livetest.enabled():
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raise unittest.SkipTest("Set TEST_LIBVIRT_HOST to run the live libvirt tests")
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cls.args = (
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os.environ["TEST_LIBVIRT_HOST"],
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os.environ.get("TEST_LIBVIRT_LOGIN", ""),
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os.environ.get("TEST_LIBVIRT_PASSWORD", ""),
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int(os.environ.get("TEST_LIBVIRT_TYPE", 4)),
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)
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cls.conn = connection_manager.get_connection(*cls.args)
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livetest.cleanup(cls.conn)
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livetest.ensure_pool(cls.conn)
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cls.inventory = livetest.inventory(cls.conn)
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super().setUpClass()
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@classmethod
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def tearDownClass(cls):
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try:
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livetest.remove_pool(cls.conn)
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finally:
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super().tearDownClass()
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if livetest.inventory(cls.conn) != cls.inventory:
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raise AssertionError("Live tests changed objects outside the test namespace")
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def tearDown(self):
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livetest.cleanup(self.conn)
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def vm(self, name, state="stopped", uefi=False, extra_devices=""):
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base = livetest.create_volume(self.conn, P + name)
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dom = livetest.define_vm(self.conn, P + name, [base], uefi=uefi, extra_devices=extra_devices)
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if state in ("running", "paused"):
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dom.create()
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if state == "paused":
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dom.suspend()
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return dom, wvmInstance(*self.args, None, uuid=dom.UUIDString())
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def pool_files(self, name):
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"""The test pool's files whose names start with the VM's name."""
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pool = self.conn.storagePoolLookupByName(livetest.POOL)
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pool.refresh(0)
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return {vol for vol in pool.listVolumes() if vol.startswith(P + name + ".")}
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def top(self, dom):
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return etree.fromstring(dom.XMLDesc(0)).xpath("string(devices/disk[@device='disk']/source/@file)")
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def test_create_revert_delete_keep_the_state(self):
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for state, expected in (("stopped", libvirt.VIR_DOMAIN_SHUTOFF),
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("running", libvirt.VIR_DOMAIN_RUNNING),
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("paused", libvirt.VIR_DOMAIN_PAUSED)):
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with self.subTest(state):
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dom, vm = self.vm("snap-" + state, state)
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base = self.top(dom)
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vm.create_external_snapshot("one", "first")
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vm.create_external_snapshot("two")
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self.assertEqual(vm.revert_external_snapshot("one"), [], "files left behind")
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self.assertEqual(dom.state()[0], expected)
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self.assertEqual(vm.delete_external_snapshot("two"), [], "files left behind")
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self.assertEqual(vm.delete_external_snapshot("one"), [], "files left behind")
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self.assertEqual(self.pool_files("snap-" + state), {os.path.basename(base)}, "an overlay stayed on disk")
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self.assertEqual(dom.snapshotNum(0), 0)
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self.assertEqual(dom.state()[0], expected)
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self.assertTrue(livetest.volume_exists(self.conn, base))
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def test_memory_snapshot_resumes_and_its_file_goes_with_it(self):
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dom, vm = self.vm("snap-mem", "running")
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vm.create_external_snapshot("m", memory=True)
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mem = os.path.join(livetest.POOL_PATH, f"{dom.UUIDString()}.m.mem")
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self.assertTrue(livetest.volume_exists(self.conn, mem))
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dom.suspend()
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vm.revert_external_snapshot("m")
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self.assertEqual(dom.state()[0], libvirt.VIR_DOMAIN_RUNNING)
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self.assertEqual(vm.delete_external_snapshot("m"), [])
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self.assertFalse(livetest.volume_exists(self.conn, mem))
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def test_uefi_vm_keeps_its_loader(self):
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dom, vm = self.vm("snap-uefi", "running", uefi=True)
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os_before = etree.tostring(etree.fromstring(dom.XMLDesc(libvirt.VIR_DOMAIN_XML_INACTIVE)).find("os"))
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vm.create_external_snapshot("u")
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vm.revert_external_snapshot("u")
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vm.delete_external_snapshot("u")
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self.assertEqual(etree.tostring(etree.fromstring(dom.XMLDesc(libvirt.VIR_DOMAIN_XML_INACTIVE)).find("os")), os_before)
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self.assertEqual(dom.snapshotNum(0), 0)
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def test_a_shut_off_vm_without_a_merge_has_no_job(self):
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# libvirt reports a shut-off VM's merge as an offline block job; none runs here
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_, vm = self.vm("snap-nojob")
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self.assertEqual(vm.get_snapshot_jobs(), [])
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def test_back_to_back_reverts_keep_a_running_vm_running(self):
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# Without the retry, the second revert within one second stopped the VM.
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dom, vm = self.vm("snap-collide", "running")
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vm.create_external_snapshot("a")
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for _ in range(3):
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vm.revert_external_snapshot("a")
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vm.revert_external_snapshot("a")
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self.assertEqual(dom.state()[0], libvirt.VIR_DOMAIN_RUNNING)
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def test_a_disk_hot_plugged_live_only_is_named_and_detached_by_a_revert(self):
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dom, vm = self.vm("snap-hotplug", "running")
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vm.create_external_snapshot("a")
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extra = livetest.create_volume(self.conn, P + "snap-hotplug-extra")
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dom.attachDeviceFlags(
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f"<disk type='file' device='disk'><driver name='qemu' type='qcow2'/><source file='{extra}'/>"
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"<target dev='vdb' bus='virtio'/></disk>",
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libvirt.VIR_DOMAIN_AFFECT_LIVE,
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)
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[snap] = vm.get_snapshot(libvirt.VIR_DOMAIN_SNAPSHOT_LIST_EXTERNAL)
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self.assertEqual(snap["detaches"], [{"dev": "vdb", "path": extra}])
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self.assertEqual(vm.revert_external_snapshot("a"), [], "the detached disk is not a leftover")
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self.assertNotIn("vdb", etree.fromstring(dom.XMLDesc(0)).xpath("devices/disk/target/@dev"))
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self.assertEqual(dom.state()[0], libvirt.VIR_DOMAIN_RUNNING)
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self.assertTrue(livetest.volume_exists(self.conn, extra))
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vm.delete_external_snapshot("a")
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def test_a_mixed_vm_can_be_cleaned_up(self):
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dom, vm = self.vm("snap-mixed-clean")
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dom.snapshotCreateXML("<domainsnapshot><name>i</name></domainsnapshot>", 0)
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dom.snapshotCreateXML(
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"<domainsnapshot><name>e</name></domainsnapshot>", libvirt.VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY
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)
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# libvirt refuses an external snapshot whose parent is internal, so the
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# internal one goes first
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vm.snapshot_delete("i")
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vm.delete_external_snapshot("e")
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self.assertEqual(dom.snapshotNum(0), 0)
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def test_chain_stays_linear(self):
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dom, vm = self.vm("snap-linear")
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vm.create_external_snapshot("a")
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vm.create_external_snapshot("b")
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vm.revert_external_snapshot("a")
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with self.assertRaisesRegex(util.OperationError, "Newer snapshots"):
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vm.create_external_snapshot("c")
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vm.delete_external_snapshot("b")
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vm.create_external_snapshot("c")
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def test_refusals(self):
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iso = livetest.create_volume(self.conn, P + "snap-media")
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cdrom = (f"<disk type='file' device='cdrom'><driver name='qemu' type='qcow2'/><source file='{iso}'/>"
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"<target dev='sda' bus='sata'/><readonly/></disk>")
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_, vm = self.vm("snap-cdrom", extra_devices=cdrom)
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with self.assertRaisesRegex(util.OperationError, "Eject"):
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vm.create_external_snapshot("x")
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dom, vm = self.vm("snap-saved", "running")
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dom.managedSave(0)
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with self.assertRaisesRegex(util.OperationError, "saved state"):
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vm.create_external_snapshot("x")
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dom, vm = self.vm("snap-mixed")
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dom.snapshotCreateXML("<domainsnapshot><name>i</name></domainsnapshot>", 0)
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with self.assertRaisesRegex(util.OperationError, "internal snapshots"):
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vm.create_external_snapshot("x")
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def test_quiesce_without_a_connected_agent_is_refused(self):
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# no guest OS runs an agent here: the channel exists but is not connected
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channel = "<channel type='unix'><target type='virtio' name='org.qemu.guest_agent.0'/></channel>"
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for name, extra in (("snap-noagent", ""), ("snap-agentchan", channel)):
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with self.subTest(name):
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dom, vm = self.vm(name, "running", extra_devices=extra)
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with self.assertRaisesRegex(util.OperationError, "guest agent is not connected"):
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vm.create_external_snapshot("q", quiesce=True)
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self.assertEqual(dom.snapshotNum(0), 0)
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def test_a_pool_without_room_for_the_overlays_is_refused(self):
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# a sparse disk ten times the pool: a tenth of it is more than the pool has free
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pool = self.conn.storagePoolLookupByName(livetest.POOL)
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big = livetest.create_volume(self.conn, P + "snap-big", size_mib=pool.info()[1] * 10 // 1024**2)
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dom = livetest.define_vm(self.conn, P + "snap-big", [big])
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vm = wvmInstance(*self.args, None, uuid=dom.UUIDString())
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with self.assertRaisesRegex(util.OperationError, f"Storage pool {livetest.POOL} has .* GiB free; the snapshot needs"):
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vm.create_external_snapshot("x")
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self.assertEqual(dom.snapshotNum(0), 0)
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vm.create_external_snapshot("x", free_percent=0, free_min_gib=0)
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vm.delete_external_snapshot("x")
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