Merge rights changes in the oVirt Engine project
by Tal Nisan
Hi everyone,
As you probably know we are now in a mode in which we develop our next
zstream version on the master branch as opposed to how we worked before
where the master version was dedicated for the next major version. This
makes the rapid changes in master to be delivered to customers in a much
higher cadence thus affecting stability.
Due to that we think it's best that from now on merges in the master branch
will be done only by stable branch maintainers after inspecting those
closely.
What you need to do in order to get your patch merged:
- Have it pass Jenkins
- Have it get code review +2
- Have it mark verified +1
- It's always encourage to have it tested by OST, for bigger changes it's a
must
Once you have all those covered, please add me as a reviewer and I'll
examine it and merge if everything seems right, if I haven't done it in a
timely manner feel free to ping me.
3 months, 3 weeks
Error Java SDK Issue??
by Geschwentner, Patrick
Dear Ladies and Gentlemen!
I am currently working with the java-sdk and I encountered a problem.
If I would like to retrieve the disk details, I get the following error:
Disk currDisk = ovirtConnection.followLink(diskAttachment.disk());
The Error is occurring in this line:
[cid:image001.png@01D44537.AF127FD0]
The getResponst looks quiet ok. (I inspected: [cid:image002.png@01D44537.AF127FD0] and it looks ok).
Error:
wrong number of arguments
The code is quiet similar to what you published on github (https://github.com/oVirt/ovirt-engine-sdk-java/blob/master/sdk/src/test/j... ).
Can you confirm the defect?
Best regards
Patrick
4 months
Re: Snapshot Deletion Issue
by Vojtech Juranek
On Tuesday, 23 March 2021 04:25:25 CET Shubha Kulkarni wrote:
> Hello,
>
> I am investigating an issue with deleting snapshot in oVirt 4.3.10.
> Basically the delete snapshot operation fails and I am seeing following
> error in VDSM(vdsm-4.30.46) log -
>
> ============================================================================
> ================================================================= 2021-03-17
> 21:38:01,346-0400 INFO (jsonrpc/1) [virt.vm]
> (vmId='4b04639c-386e-463c-8a8a-dfd3bc46d306') Starting merge with
> jobUUID=u'e6206d9f-6899-40b7-857a-3be3dd42d77d', original
> chain=ac065664-ad6c-4ad6-aea2-9558df71d41d <
> 210900dd-ff19-4a00-8706-926cb192b0db < 273fc001-1c18-4234-b2b6-f0485e5d13ef
> < e1e10354-ae43-456f-9341-1bb81c5bf960 <
> 7985a853-4d47-428b-bb5b-b34a38cc57e0 (top), disk='sda', base='sda[2]',
> top='sda[1]', bandwidth=0, flags=8 (vm:5954) 2021-03-17 21:38:01,354-0400
> ERROR (jsonrpc/1) [virt.vm] (vmId='4b04639c-386e-463c-8a8a-dfd3bc46d306')
> Live merge failed (job: e6206d9f-6899-40b7-857a-3be3dd42d77d) (vm:5960)
> Traceback (most recent call last):
> File "/usr/lib/python2.7/site-packages/vdsm/virt/vm.py", line 5958, in
> merge bandwidth, flags)
> File "/usr/lib/python2.7/site-packages/vdsm/virt/virdomain.py", line 100,
> in f ret = attr(*args, **kwargs)
> File "/usr/lib/python2.7/site-packages/vdsm/common/libvirtconnection.py",
> line 131, in wrapper ret = f(*args, **kwargs)
> File "/usr/lib/python2.7/site-packages/vdsm/common/function.py", line 94,
> in wrapper return func(inst, *args, **kwargs)
> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 719, in
> blockCommit if ret == -1: raise libvirtError ('virDomainBlockCommit()
> failed', dom=self) libvirtError: internal error: qemu block name
> 'json:{"backing": {"backing": {"backing": {"driver": "raw", "file":
> {"driver": "file", "filename":
> "/rhev/data-center/mnt/nash-nfs7:_nfs_shubha__ovirt__2_data/8bce5be7-aede-4
> 743-b3fd-1c199880892f/images/eb3cb8f2-9544-472f-946b-646eab9c621f/ac065664-a
> d6c-4ad6-aea2-9558df71d41d"}}, "driver": "qcow2", "file": {"driver": "file",
> "filename":
> "/rhev/data-center/mnt/nash-nfs7:_nfs_shubha__ovirt__2_data/8bce5be7-aede-4
> 743-b3fd-1c199880892f/images/eb3cb8f2-9544-472f-946b-646eab9c621f/210900dd-f
> f19-4a00-8706-926cb192b0db"}}, "driver": "qcow2", "file": {"driver": "file",
> "filename":
> "/rhev/data-center/mnt/nash-nfs7:_nfs_shubha__ovirt__2_data/8bce5be7-aede-4
> 743-b3fd-1c199880892f/images/eb3cb8f2-9544-472f-946b-646eab9c621f/273fc001-1
> c18-4234-b2b6-f0485e5d13ef"}}, "driver": "qcow2", "file": {"driver": "file",
> "filename":
> "/rhev/data-center/mnt/nash-nfs7:_nfs_shubha__ovirt__2_data/8bce5be7-aede-4
> 743-b3fd-1c199880892f/images/eb3cb8f2-9544-472f-946b-646eab9c621f/e1e10354-a
> e43-456f-9341-1bb81c5bf960"}}' doesn 2021-03-17 21:38:01,368-0400 INFO
> (jsonrpc/1) [api.virt] FINISH merge return={'status': {'message': 'Merge
> failed', 'code': 52}}
> ===========================================================================
> =================================================================
>
> I found out that there is an issue logged here
> https://bugzilla.redhat.com/show_bug.cgi?id=1785939. However I am not able
> to see how it was fixed
see https://bugzilla.redhat.com/show_bug.cgi?id=1785939#c10
> and whether it was merged in oVirt. Where can I
> find the relevant commit (in vdsm and/or libvirt)?
>
> Thanks
4 months, 2 weeks
Snapshot Deletion Issue
by Shubha Kulkarni
Hello,
I am investigating an issue with deleting snapshot in oVirt 4.3.10. Basically the delete snapshot operation fails and I am seeing following error in VDSM(vdsm-4.30.46) log -
=============================================================================================================================================
2021-03-17 21:38:01,346-0400 INFO (jsonrpc/1) [virt.vm] (vmId='4b04639c-386e-463c-8a8a-dfd3bc46d306') Starting merge with jobUUID=u'e6206d9f-6899-40b7-857a-3be3dd42d77d', original chain=ac065664-ad6c-4ad6-aea2-9558df71d41d < 210900dd-ff19-4a00-8706-926cb192b0db < 273fc001-1c18-4234-b2b6-f0485e5d13ef < e1e10354-ae43-456f-9341-1bb81c5bf960 < 7985a853-4d47-428b-bb5b-b34a38cc57e0 (top), disk='sda', base='sda[2]', top='sda[1]', bandwidth=0, flags=8 (vm:5954)
2021-03-17 21:38:01,354-0400 ERROR (jsonrpc/1) [virt.vm] (vmId='4b04639c-386e-463c-8a8a-dfd3bc46d306') Live merge failed (job: e6206d9f-6899-40b7-857a-3be3dd42d77d) (vm:5960)
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/vdsm/virt/vm.py", line 5958, in merge
bandwidth, flags)
File "/usr/lib/python2.7/site-packages/vdsm/virt/virdomain.py", line 100, in f
ret = attr(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/vdsm/common/libvirtconnection.py", line 131, in wrapper
ret = f(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/vdsm/common/function.py", line 94, in wrapper
return func(inst, *args, **kwargs)
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 719, in blockCommit
if ret == -1: raise libvirtError ('virDomainBlockCommit() failed', dom=self)
libvirtError: internal error: qemu block name 'json:{"backing": {"backing": {"backing": {"driver": "raw", "file": {"driver": "file", "filename": "/rhev/data-center/mnt/nash-nfs7:_nfs_shubha__ovirt__2_data/8bce5be7-aede-4743-b3fd-1c199880892f/images/eb3cb8f2-9544-472f-946b-646eab9c621f/ac065664-ad6c-4ad6-aea2-9558df71d41d"}}, "driver": "qcow2", "file": {"driver": "file", "filename": "/rhev/data-center/mnt/nash-nfs7:_nfs_shubha__ovirt__2_data/8bce5be7-aede-4743-b3fd-1c199880892f/images/eb3cb8f2-9544-472f-946b-646eab9c621f/210900dd-ff19-4a00-8706-926cb192b0db"}}, "driver": "qcow2", "file": {"driver": "file", "filename": "/rhev/data-center/mnt/nash-nfs7:_nfs_shubha__ovirt__2_data/8bce5be7-aede-4743-b3fd-1c199880892f/images/eb3cb8f2-9544-472f-946b-646eab9c621f/273fc001-1c18-4234-b2b6-f0485e5d13ef"}}, "driver": "qcow2", "file": {"driver": "file", "filename": "/rhev/data-center/mnt/nash-nfs7:_nfs_shubha__ovirt__2_data/8bce5be7-aede-4743-b3fd-1c199880892f/images/eb3cb8f2-9544-472f-946b-646eab9c621f/e1e10354-ae43-456f-9341-1bb81c5bf960"}}' doesn
2021-03-17 21:38:01,368-0400 INFO (jsonrpc/1) [api.virt] FINISH merge return={'status': {'message': 'Merge failed', 'code': 52}}
============================================================================================================================================
I found out that there is an issue logged here https://bugzilla.redhat.com/show_bug.cgi?id=1785939. However I am not able to see how it was fixed and whether it was merged in oVirt. Where can I find the relevant commit (in vdsm and/or libvirt)?
Thanks
4 months, 2 weeks
Re: docs: pointers to more in-depth internals?
by Nir Soffer
On Tue, Mar 16, 2021 at 10:47 PM Greg King <greg.king(a)oracle.com> wrote:
> I am new to vdsm and trying to understand the architecture/internals much
> better
>
Welcome to vdsm Greg!
The ovirt documentation for architecture I have found so far seems to be
> relatively high level
>
And it is mostly outdated, but we don't have anything better.
> My effort to understand the architecture by walking through the vdsm code
> using pdb/rpdb is slow and probably not all that efficient
>
>
>
> Does anyone have pointers to documentation that might explain the vdsm
> modules, classes and internals a little more in depth?
>
I don't think we have more detailed documentation, but there are lot of
talks and slide decks that give more info on specific topics, and are
usually
are more updated:
https://www.ovirt.org/community/archived_conferences_presentations.html
There is also lot of content on youtube, here some example that I could
find easily:
- [oVirt 3.6 deep dive] - live storage migration between mixed domains
https://www.youtube.com/watch?v=BPy29Q__VV4
- oVirt 4.1 deep dive - VM leases
https://www.youtube.com/watch?v=MVa-4fQo2V8
- Back to the future – incremental backup in oVirt
https://www.youtube.com/watch?v=X-xHD9ddN6s
- oVirt 4k - teaching an old dog new tricks
https://www.youtube.com/watch?v=Q1VQxjYEzDY
>
> I’d also like to understand where I might be able to add rpdb.set_trace()
> so I can step through functions being called in libvirt.py
>
I don't think using a debugger is very helpful with vdsm, since vdsm is not
designed for stopping a thread for unlimited time. In some cases the system
will log warning and traceback every 60 seconds about blocked worker.
In other cases monitoring code may fail to update stats, which may cause
engines to deactivate a host or migrate vms or other trouble.
The best way to debug and understand vdsm is to follow the logs, and add
move logs when needed. The main advantage compared with a debugger is
that the time spent with the logs will pay back when you have to debug real
issues in user setup, when logs are the only available resource.
Having said that, being able to follow the entire flow by printing a
traceback
is a great way to understand how the system works.
You can use vdsm.common.concurrent.format_traceback:
https://github.com/oVirt/vdsm/blob/114121ab122a0cd5e529807b938b3506f247f4...
To print traceback at interesting points. For tracing function from the
libvirt
python binginding, you can modify libvirtconnection.py:
https://github.com/oVirt/vdsm/blob/114121ab122a0cd5e529807b938b3506f247f4...
This module creates a connection, and wraps libvirt.virDomain with a wrapper
that panics on fatal errors. You can modify the wrapper to log a traceback
for all or some of libvirt.virDomain functions.
Another option it to modify the virDomain wrapper to log a traceback:
https://github.com/oVirt/vdsm/blob/114121ab122a0cd5e529807b938b3506f247f4...
For example here:
https://github.com/oVirt/vdsm/blob/114121ab122a0cd5e529807b938b3506f247f4...
Good luck with your vdsm ride!
Nir
4 months, 2 weeks
