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Bug 2092752 - [RFE] RFE to allow enabling ZEROCOPY live migration through libvirt to be consumed by VDSM
Summary: [RFE] RFE to allow enabling ZEROCOPY live migration through libvirt to be co...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: libvirt-python
Version: 9.1
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Jiri Denemark
QA Contact: lcheng
URL:
Whiteboard:
Depends On: 1968509 2089431
Blocks: 2092756
TreeView+ depends on / blocked
 
Reported: 2022-06-02 07:41 UTC by Nils Koenig
Modified: 2022-11-15 10:56 UTC (History)
7 users (show)

Fixed In Version: libvirt-python-8.5.0-1.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-11-15 10:09:35 UTC
Type: Feature Request
Target Upstream Version: 8.5.0
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-124022 0 None None None 2022-06-02 07:53:52 UTC
Red Hat Product Errata RHBA-2022:8007 0 None None None 2022-11-15 10:09:46 UTC

Comment 2 Jiri Denemark 2022-06-24 12:31:27 UTC 
Nothing to be done here, just rebuild libvirt-python once libvirt is rebased.
Comment 4 Dan Zheng 2022-07-15 07:30:41 UTC 
Changed the ITM as this bug was just in Modified yesterday and there are weekend followed, QE do not have enough time to work it out. So QE will handle it in next ITM (21).

Dan
Comment 5 lcheng 2022-07-22 08:39:41 UTC 
Test with python3-libvirt-8.5.0-1.el9.x86_64, libvirt-8.5.0-2.el9.x86_64 and qemu-kvm-7.0.0-9.el9.x86_64.


Scenario 1(negative): parallel + zerocopy + native_tls + p2p

# python
Python 3.9.13 (main, Jun  9 2022, 00:00:00) 
[GCC 11.3.1 20220421 (Red Hat 11.3.1-2)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import libvirt
>>> src_conn = libvirt.open()
>>> desturi = "qemu+tcp://dell-per740-43.lab.eng.pek2.redhat.com/system"
>>> srcconn = libvirt.open()
>>> destconn = libvirt.open("qemu+tcp://dell-per740-43.lab.eng.pek2.redhat.com/system")
>>> dom = srcconn.lookupByName("avocado-vt-vm1")
>>> flags = libvirt.VIR_MIGRATE_LIVE|libvirt.VIR_MIGRATE_AUTO_CONVERGE|libvirt.VIR_MIGRATE_POSTCOPY|libvirt.VIR_MIGRATE_ZEROCOPY|libvirt.VIR_MIGRATE_TLS|libvirt.VIR_MIGRATE_PARALLEL|libvirt.VIR_MIGRATE_PEER2PEER
>>> dom.migrateToURI3(desturi, {'bandwidth': 100}, flags)
libvirt: QEMU Driver error : operation failed: job 'migration out' failed: Requested Zero Copy feature is not available: Invalid argument
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.9/site-packages/libvirt.py", line 2157, in migrateToURI3
    raise libvirtError('virDomainMigrateToURI3() failed')
libvirt.libvirtError: operation failed: job 'migration out' failed: Requested Zero Copy feature is not available: Invalid argument
>>> 


Scenario 2(negative): parallel + zerocopy + native_tls + non-p2p

>>> flags = libvirt.VIR_MIGRATE_LIVE|libvirt.VIR_MIGRATE_AUTO_CONVERGE|libvirt.VIR_MIGRATE_POSTCOPY|libvirt.VIR_MIGRATE_ZEROCOPY|libvirt.VIR_MIGRATE_TLS|libvirt.VIR_MIGRATE_PARALLEL
>>> dom.migrate3(destconn, {'bandwidth': 100}, flags)
libvirt: QEMU Driver error : operation failed: job 'migration out' failed: Requested Zero Copy feature is not available: Invalid argument
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.9/site-packages/libvirt.py", line 1969, in migrate3
    raise libvirtError('virDomainMigrate3() failed')
libvirt.libvirtError: operation failed: job 'migration out' failed: Requested Zero Copy feature is not available: Invalid argument
>>> 
>>> 


Scenario 3(negative): non_parallel + zerocopy + p2p

>>> flags = libvirt.VIR_MIGRATE_LIVE|libvirt.VIR_MIGRATE_AUTO_CONVERGE|libvirt.VIR_MIGRATE_POSTCOPY|libvirt.VIR_MIGRATE_ZEROCOPY|libvirt.VIR_MIGRATE_PEER2PEER
>>> dom.migrateToURI3(desturi, {'bandwidth': 100}, flags)
libvirt: QEMU Driver error : Requested operation is not valid: zero-copy is only available for parallel migration
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.9/site-packages/libvirt.py", line 2157, in migrateToURI3
    raise libvirtError('virDomainMigrateToURI3() failed')
libvirt.libvirtError: Requested operation is not valid: zero-copy is only available for parallel migration


Scenario 4(negative): non_parallel + zerocopy + non_p2p

>>> flags = libvirt.VIR_MIGRATE_LIVE|libvirt.VIR_MIGRATE_AUTO_CONVERGE|libvirt.VIR_MIGRATE_POSTCOPY|libvirt.VIR_MIGRATE_ZEROCOPY
>>> dom.migrate3(destconn, {'bandwidth': 100}, flags)
libvirt: QEMU Driver error : Requested operation is not valid: zero-copy is only available for parallel migration
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.9/site-packages/libvirt.py", line 1969, in migrate3
    raise libvirtError('virDomainMigrate3() failed')
libvirt.libvirtError: Requested operation is not valid: zero-copy is only available for parallel migration


Scenario 5: parallel + zerocopy + non_p2p

>>> flags = libvirt.VIR_MIGRATE_LIVE|libvirt.VIR_MIGRATE_AUTO_CONVERGE|libvirt.VIR_MIGRATE_POSTCOPY|libvirt.VIR_MIGRATE_PARALLEL|libvirt.VIR_MIGRATE_ZEROCOPY
>>> dom.migrate3(destconn, {'bandwidth': 10}, flags)
<libvirt.virDomain object at 0x7f81309e0370>


Scenario 6: parallel + zerocopy + p2p

>>> srcconn = libvirt.open()
>>> desturi = "qemu+tcp://dell-per740-43.lab.eng.pek2.redhat.com/system"
>>> destconn = libvirt.open("qemu+tcp://dell-per740-43.lab.eng.pek2.redhat.com/system")
>>> dom = srcconn.lookupByName("avocado-vt-vm1")
>>> flags = libvirt.VIR_MIGRATE_LIVE|libvirt.VIR_MIGRATE_PEER2PEER|libvirt.VIR_MIGRATE_AUTO_CONVERGE|libvirt.VIR_MIGRATE_POSTCOPY|libvirt.VIR_MIGRATE_PARALLEL|libvirt.VIR_MIGRATE_ZEROCOPY
>>> dom.migrateToURI3(desturi, {'bandwidth': 10}, flags)
0
>>>  


Scenario 7: parallel + zerocopy, abort migration, then migrate again.

terminal 1:

>>> srcconn = libvirt.open()
>>> desturi = "qemu+tcp://dell-per740-43.lab.eng.pek2.redhat.com/system"
>>> destconn = libvirt.open("qemu+tcp://dell-per740-43.lab.eng.pek2.redhat.com/system")
>>> dom = srcconn.lookupByName("avocado-vt-vm1")
>>> flags = libvirt.VIR_MIGRATE_LIVE|libvirt.VIR_MIGRATE_AUTO_CONVERGE|libvirt.VIR_MIGRATE_POSTCOPY|libvirt.VIR_MIGRATE_ZEROCOPY|libvirt.VIR_MIGRATE_PARALLEL
>>> dom.migrate3(destconn, {'bandwidth': 100}, flags)
libvirt: QEMU Driver error : operation aborted: job 'migration out' canceled by client
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.9/site-packages/libvirt.py", line 1969, in migrate3
    raise libvirtError('virDomainMigrate3() failed')
libvirt.libvirtError: operation aborted: job 'migration out' canceled by client


>>> dom.migrate3(destconn, {'bandwidth': 100}, flags)
<libvirt.virDomain object at 0x7f8132896970>
>>> 


terminal 2:

# virsh domjobabort avocado-vt-vm1
Comment 9 errata-xmlrpc 2022-11-15 10:09:35 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (libvirt-python bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:8007
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