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fix(instances): recovery removes the UEFI variables copy of a clone that was not defined

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A shut-off clone copies the VM's NVRAM file just before it defines the
clone; a worker that stopped between the two left the copy, unnamed by
the job, which recovery then reported as leaving nothing. The job
records the copy's path once libvirt made it, and recovery deletes that
file when the clone was not defined, in whichever pool it is.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Kk4h2TcUiaWmU5MUszYSea
This commit is contained in:
catborise 2026-11-07 23:46:49 +03:00
parent b4e5567e4a
commit ce98bc85d0
4 changed files with 71 additions and 19 deletions
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36
instances/tests/test_clone_job.py
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@ -2,7 +2,7 @@
import contextlib
from types import SimpleNamespace
from unittest.mock import MagicMock, patch
from unittest.mock import ANY, MagicMock, patch
from uuid import uuid4
import libvirt
@ -71,7 +71,7 @@ class CloneJobTestCase(TransactionTestCase):
Operation.objects.filter(pk=op.pk).update(state=Operation.RUNNING, worker="wvc-test:1:a")
op.refresh_from_db()
CloneInstance().run(op, Context(op, SimpleNamespace(identity="wvc-test:1:a")))
self.proxy.clone_instance.assert_called_once_with(op.intent["clone"], op.intent["uuid"])
self.proxy.clone_instance.assert_called_once_with(op.intent["clone"], op.intent["uuid"], on_nvram=ANY)
clone = Instance.objects.get(uuid=op.intent["uuid"])
self.assertTrue(UserInstance.objects.filter(instance=clone, user=self.admin).exists())
@ -178,7 +178,8 @@ class CloneJobTestCase(TransactionTestCase):
@patch("instances.jobs.wvmConnect")
def test_recovery(self, conn):
op = Operation(user=self.admin, intent={"compute": self.compute.pk, "uuid": "abababab-0000-1111-2222-333333333333",
op = Operation(user=self.admin, params={"instance": self.source.pk},
intent={"compute": self.compute.pk, "uuid": "abababab-0000-1111-2222-333333333333",
"name": "copy", "clone": {"name": "copy", "disk-vda": "copy.qcow2"}})
recovered = CloneInstance().reconcile(op)
self.assertEqual(recovered.state, Operation.SUCCEEDED) # the VM is defined
@ -195,7 +196,8 @@ class CloneJobTestCase(TransactionTestCase):
@patch("instances.jobs.wvmConnect")
def test_recovery_gives_a_defined_shut_off_clone_the_size_asked(self, conn):
conn.return_value.wvm.lookupByUUIDString.return_value.state.return_value = [libvirt.VIR_DOMAIN_SHUTOFF, 0]
op = Operation(user=self.admin, intent={"compute": self.compute.pk, "uuid": "abababab-0000-1111-2222-333333333333",
op = Operation(user=self.admin, params={"instance": self.source.pk},
intent={"compute": self.compute.pk, "uuid": "abababab-0000-1111-2222-333333333333",
"name": "copy", "clone": {"name": "copy", "disk-vda": "copy.qcow2",
"vcpu": 4, "memory": None, "start": True}})
recovered = CloneInstance().reconcile(op)
@ -206,7 +208,8 @@ class CloneJobTestCase(TransactionTestCase):
@patch("instances.jobs.wvmConnect")
def test_a_clone_that_left_nothing_failed(self, conn):
op = Operation(user=self.admin, intent={"compute": self.compute.pk, "uuid": "abababab-0000-1111-2222-333333333333",
op = Operation(user=self.admin, params={"instance": self.source.pk},
intent={"compute": self.compute.pk, "uuid": "abababab-0000-1111-2222-333333333333",
"name": "copy", "clone": {"name": "copy", "disk-vda": "copy.qcow2"}})
missing = libvirt.libvirtError("no domain")
missing.err = (libvirt.VIR_ERR_NO_DOMAIN, libvirt.VIR_FROM_QEMU, "no domain")
@ -214,6 +217,27 @@ class CloneJobTestCase(TransactionTestCase):
conn.return_value.wvm.listAllStoragePools.return_value = [pool(["other.qcow2"])]
self.assertEqual(CloneInstance().reconcile(op).state, Operation.FAILED)
@patch("instances.jobs.wvmInstances")
@patch("instances.jobs.wvmConnect")
def test_a_clone_not_defined_leaves_no_copy_of_the_uefi_variables(self, conn, hosts):
"""define_clone copies them just before it defines the clone; the job records the copy it made."""
op = Operation(user=self.admin, params={"instance": self.source.pk},
intent={"compute": self.compute.pk, "uuid": "abababab-0000-1111-2222-333333333333",
"name": "copy", "clone": {"name": "copy", "disk-vda": "copy.qcow2"}})
missing = libvirt.libvirtError("no domain")
missing.err = (libvirt.VIR_ERR_NO_DOMAIN, libvirt.VIR_FROM_QEMU, "no domain")
conn.return_value.wvm.lookupByUUIDString.side_effect = missing
conn.return_value.wvm.listAllStoragePools.return_value = []
CloneInstance().reconcile(op) # no copy recorded: nothing of the job to remove
hosts.return_value.delete_nvram.assert_not_called()
op.intent["nvram_copy"] = "/var/lib/libvirt/qemu/nvram/copy_VARS.fd"
self.assertEqual(CloneInstance().reconcile(op).state, Operation.FAILED)
hosts.return_value.delete_nvram.assert_called_once_with("copy_VARS.fd")
op.intent["nvram_copy"] = "/pool/copy_VARS.fd" # in a storage pool
CloneInstance().reconcile(op)
hosts.return_value.wvm.storageVolLookupByPath.assert_called_once_with("/pool/copy_VARS.fd")
hosts.return_value.wvm.storageVolLookupByPath.return_value.delete.assert_called_once_with(0)
def libvirt_error(code):
err = libvirt.libvirtError("libvirt error")
@ -297,7 +321,7 @@ class LiveCloneJobTestCase(TransactionTestCase):
op = self.op()
CloneInstance().precheck(op, None)
self.run_job(op)
self.proxy.clone_instance.assert_called_once_with(op.intent["clone"], op.intent["uuid"])
self.proxy.clone_instance.assert_called_once_with(op.intent["clone"], op.intent["uuid"], on_nvram=ANY)
self.proxy.live_clone_targets.assert_not_called()
self.assertFalse(Operation.objects.get(pk=op.pk).intent["live"])