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cloner: Drop ability to clone a paused VM

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Generally this doesn't work with qemu metadata locking nowadays,
and it was never a safe idea to begin with, because disk contents
could be in an inconsistent state.

https://bugzilla.redhat.com/show_bug.cgi?id=1725330

Signed-off-by: Cole Robinson <crobinso@redhat.com>
This commit is contained in:
Cole Robinson 2020-01-29 16:14:55 -05:00
parent 1e1cd4c564
commit 140a1f3b15
6 changed files with 16 additions and 25 deletions
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3
man/virt-clone.pod
View File

@ -38,8 +38,7 @@ Connect to a non-default hypervisor. See L<virt-install(1)> for details
=item B<--original> ORIGINAL_GUEST
Name of the original guest to be cloned. This guest must be shut off or paused
since it is not possible to safely clone active guests at this time.
Name of the original guest to be cloned. This guest must be shut off.
=item B<--original-xml> ORIGINAL_XML

18
tests/test_cli.py
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@ -1297,7 +1297,7 @@ _CLONE_NVRAM = "%s/clone-nvram-auto.xml" % XMLDIR
vclon = App("virt-clone")
c = vclon.add_category("remote", "--connect %(URI-TEST-REMOTE)s")
c.add_valid("-o test --auto-clone") # Auto flag, no storage
c.add_valid("-o test --clone-running --auto-clone") # Auto flag, no storage
c.add_valid("--original-xml " + _CLONE_MANAGED + " --auto-clone") # Auto flag w/ managed storage
c.add_invalid("--original-xml " + _CLONE_UNMANAGED + " --auto-clone") # Auto flag w/ local storage, which is invalid for remote connection
c.add_invalid("--original-xml " + _CLONE_UNMANAGED + " --auto-clone") # Auto flag w/ local storage, which is invalid for remote connection
@ -1307,24 +1307,24 @@ c = vclon.add_category("misc", "")
c.add_compare("--connect %(URI-KVM)s -o test-clone --auto-clone --clone-running", "clone-auto1")
c.add_compare("--connect %(URI-TEST-FULL)s -o test-clone-simple --name newvm --auto-clone --clone-running", "clone-auto2")
c.add_valid("--connect %(URI-KVM)s --original-xml " + _CLONE_NVRAM + " --auto-clone --clone-running") # hits a particular nvram code path
c.add_valid("-o test --auto-clone --uuid 12345678-12F4-1234-1234-123456789AFA --reflink --mac 12:34:56:1A:B2:C3") # Auto flag, no storage
c.add_valid("-o test --clone-running --auto-clone --uuid 12345678-12F4-1234-1234-123456789AFA --reflink --mac 12:34:56:1A:B2:C3") # Auto flag, no storage
c.add_valid("--original-xml " + _CLONE_MANAGED + " --auto-clone") # Auto flag w/ managed storage
c.add_valid("--original-xml " + _CLONE_UNMANAGED + " --auto-clone") # Auto flag w/ local storage
c.add_valid("--connect %(URI-TEST-FULL)s -o test-clone --auto-clone --clone-running --nonsparse") # Auto flag, actual VM, skip state check
c.add_valid("--connect %(URI-TEST-FULL)s -o test-clone-simple -n newvm --preserve-data --file %(EXISTIMG1)s") # Preserve data shouldn't complain about existing volume
c.add_valid("-n clonetest --original-xml " + _CLONE_UNMANAGED + " --file %(EXISTIMG3)s --file %(EXISTIMG4)s --check path_exists=off") # Skip existing file check
c.add_invalid("--auto-clone") # Just the auto flag
c.add_invalid("-o test --file foo") # Didn't specify new name
c.add_invalid("-o test --auto-clone -n test") # new name raises error
c.add_invalid("-o test --clone-running --file foo") # Didn't specify new name
c.add_invalid("-o test --clone-running --auto-clone -n test") # new name raises error
c.add_invalid("--connect %(URI-TEST-FULL)s -o test-many-devices --auto-clone") # VM is running, but --clone-running isn't passed
c.add_invalid("--connect %(URI-TEST-FULL)s -o test-clone-simple -n newvm --file %(EXISTIMG1)s --clone-running") # Should complain about overwriting existing file
c.add_invalid("--connect %(URI-TEST-REMOTE)s -o test-clone-simple --auto-clone --file /dev/default-pool/testvol9.img --check all=off", grep="Clone onto existing storage volume") # hit a specific error message
c = vclon.add_category("general", "-n clonetest")
c.add_valid("-o test --auto-clone --replace") # Auto flag, no storage, --replace is redundant
c.add_valid("-o test --file %(NEWCLONEIMG1)s --file %(NEWCLONEIMG2)s") # Nodisk, but with spurious files passed
c.add_valid("-o test --file %(NEWCLONEIMG1)s --file %(NEWCLONEIMG2)s --prompt") # Working scenario w/ prompt shouldn't ask anything
c.add_valid("-o test --clone-running --auto-clone --replace") # Auto flag, no storage, --replace is redundant
c.add_valid("-o test --clone-running --file %(NEWCLONEIMG1)s --file %(NEWCLONEIMG2)s") # Nodisk, but with spurious files passed
c.add_valid("-o test --clone-running --file %(NEWCLONEIMG1)s --file %(NEWCLONEIMG2)s --prompt") # Working scenario w/ prompt shouldn't ask anything
c.add_valid("--original-xml " + _CLONE_UNMANAGED + " --file %(NEWCLONEIMG1)s --file %(NEWCLONEIMG2)s") # XML File with 2 disks
c.add_valid("--original-xml " + _CLONE_UNMANAGED + " --file %(NEWCLONEIMG1)s --skip-copy=hda") # XML w/ disks, skipping one disk target
c.add_valid("--original-xml " + _CLONE_UNMANAGED + " --file virt-install --file %(EXISTIMG1)s --preserve") # XML w/ disks, overwriting existing files with --preserve
@ -1334,10 +1334,10 @@ c.add_valid("--original-xml " + _CLONE_MANAGED + " --file %(NEWIMG1)s") # XML w
c.add_valid("--original-xml " + _CLONE_MANAGED + " --file %(NEWIMG1)s --reflink") # XML w/ managed storage, specify managed path
c.add_valid("--original-xml " + _CLONE_NOEXIST + " --file %(EXISTIMG1)s --preserve") # XML w/ managed storage, specify managed path across pools# Libvirt test driver doesn't support cloning across pools# XML w/ non-existent storage, with --preserve
c.add_valid("--connect %(URI-TEST-FULL)s -o test-clone -n test --auto-clone --replace") # Overwriting existing running VM
c.add_invalid("-o test foobar") # Positional arguments error
c.add_invalid("-o test --clone-running foobar") # Positional arguments error
c.add_invalid("-o idontexist") # Non-existent vm name
c.add_invalid("-o idontexist --auto-clone") # Non-existent vm name with auto flag,
c.add_invalid("-o test -n test") # Colliding new name
c.add_invalid("-o test --clone-running -n test") # Colliding new name
c.add_invalid("--original-xml " + _CLONE_UNMANAGED + "") # XML file with several disks, but non specified
c.add_invalid("--original-xml " + _CLONE_UNMANAGED + " --file virt-install --file %(EXISTIMG1)s") # XML w/ disks, overwriting existing files with no --preserve
c.add_invalid("--original-xml " + _CLONE_UNMANAGED + " --file %(NEWCLONEIMG1)s --file %(NEWCLONEIMG2)s --force-copy=hdc") # XML w/ disks, force copy but not enough disks passed

2
tests/test_cloner.py
View File

@ -197,7 +197,7 @@ class TestClone(unittest.TestCase):
cloner = Cloner(conn)
cloner.original_guest = "test-snapshots"
cloner.setup_original()
self.assertTrue("paused or shutoff" in str(err.exception))
self.assertTrue("must be shutoff" in str(err.exception))
with self.assertRaises(ValueError) as err:
cloner = Cloner(conn)

4
virtManager/object/domain.py
View File

@ -1512,9 +1512,7 @@ class vmmDomain(vmmLibvirtObject):
def is_paused(self):
return self.status() in [libvirt.VIR_DOMAIN_PAUSED]
def is_clonable(self):
return self.status() in [libvirt.VIR_DOMAIN_SHUTOFF,
libvirt.VIR_DOMAIN_PAUSED,
libvirt.VIR_DOMAIN_PMSUSPENDED]
return self.status() in [libvirt.VIR_DOMAIN_SHUTOFF]
def run_status(self):
return LibvirtEnumMap.pretty_run_status(

11
virtinst/cloner.py
View File

@ -297,15 +297,10 @@ class Cloner(object):
log.debug("Original sizes: %s",
[d.get_size() for d in self.original_disks])
# If domain has devices to clone, it must be 'off' or 'paused'
if (not self.clone_running and
(self.original_dom and len(self.original_disks) != 0)):
if not self.clone_running and self.original_dom:
status = self.original_dom.info()[0]
if status not in [libvirt.VIR_DOMAIN_SHUTOFF,
libvirt.VIR_DOMAIN_PAUSED]:
raise RuntimeError(_("Domain with devices to clone must be "
"paused or shutoff."))
if status not in [libvirt.VIR_DOMAIN_SHUTOFF]:
raise RuntimeError(_("Domain to clone must be shutoff."))
def _setup_disk_clone_destination(self, orig_disk, clone_disk):
"""

3
virtinst/virtclone.py
View File

@ -92,8 +92,7 @@ def parse_args():
geng = parser.add_argument_group(_("General Options"))
geng.add_argument("-o", "--original", dest="original_guest",
help=_("Name of the original guest; "
"The status must be shut off or paused."))
help=_("Name of the original guest to clone."))
geng.add_argument("--original-xml",
help=_("XML file to use as the original guest."))
geng.add_argument("--auto-clone", action="store_true",