Re: [Users] VMs and volumes disappearing
by Martijn Grendelman
Hi,
>> I just had the same problem again.
>> - Stopped oVirt engine
>> - Checked the 'async_tasks' table. It was empty!
>> - Started oVirt engine
>> - Same set of imported VMs as last time deleted!
>>
>> I thought that lingering records from the 'async_tasks' table were to
>> blame, but apparently, that's not the case.
>>
>> Can you tell me what I need to check/do/modify/update/delete before
>> restarting oVirt that will keep my VMs from being deleted? (Please see
>> below for a note on upgrading like you suggested)
>
> make sure you dont have records at async_tasks with vdsm_task_id of
> "empty guid" - but i'm really not in favor of such hacks, this is a
> hack. I strongly suggest you solve upgrade issue (please communicate
> with ofer on this).
OK, I understand that, but for the record: 'async_tasks' was completely
empty before I started Engine, so this hack wouldn't have been of any use.
Cheers,
Martijn.
11 years, 1 month
Re: [Users] VMs and volumes disappearing
by Martijn Grendelman
Hello Yair,
Thank you for your answers, but I still have some questions left ;-)
>> I find engine.log somewhat hard to read, to be honest, and documentation
>> is hard to find, but I think I found some clues.
>
> Hi,
> I understand what you're saying about engine.log, when I asked for
> it, it was because I'm one of the maintainers of ovirt engine, so I
> thought I could give you a hand here, especially after reading your
> email and getting a sense that I saw a similar issue in the past.
If you want, I can send you my log. I wasn't sure if that's what you meant.
I just had the same problem again.
- Stopped oVirt engine
- Checked the 'async_tasks' table. It was empty!
- Started oVirt engine
- Same set of imported VMs as last time deleted!
I thought that lingering records from the 'async_tasks' table were to
blame, but apparently, that's not the case.
Can you tell me what I need to check/do/modify/update/delete before
restarting oVirt that will keep my VMs from being deleted? (Please see
below for a note on upgrading like you suggested)
>> I think I have an idea about what happended now.
>>
>> The 2 disappeared VMs have been imported into oVirt using virt-v2v. The
>> 3rd one that's now missing a disk volume was not, but I have been
>> playing with storage migration in the past.
>
> Then this is the reason, other users have complained about it at users(a)ovirt.org
I have read the thread about disappearing VMs from August and indeed it
sounds like this might me the same problem.
> Upgrade I just talked with Ofer (CC'ed), our release engineer, and he
> said that all packages should be 3.3.0-4 (notice ovirt-engine is
> not) I hope this helps you out,
There are no updates, at least Yum doesn't give me any. I enabled the
beta channel just now, but that doesn't make a difference. 3.3.0-1 is
the latest version. What am I missing?
martijn@ovirt:~> sudo yum list all|grep ovirt-engine.noarch
ovirt-engine.noarch 3.3.0-1.el6 @ovirt-beta
Best regards,
Martijn Grendelman
11 years, 1 month
[Users] Could not login into the iscsi domain
by Saurabh
Hi guyz,
I have setup my ovirt engine with NFS as datacenter storage, so the
default datacenter has nfs storage.
Now have created a test datacenter inside ovirt with Type = iscsi. When
I try to add new storage domain to this datacenter, I am able to
discover the Lun but could not log in.
Any help will be much appreciated.
Thanks
Saurabh
11 years, 1 month
Re: [Users] VMs and volumes disappearing
by Martijn Grendelman
Hi,
>> I have recently set up an oVirt environment, I think in a pretty
>> standard fashion, with engine 3.3 on one host, one oVirt host on a
>> physical machine, both running CentOS 6.4, using NFS for all storage
>> domains.
>
> Please provide rpm -qa on the ovirt rpms (ovirt engine).
martijn@ovirt:~> rpm -qa | grep ovirt
ovirt-log-collector-3.3.0-1.el6.noarch
ovirt-engine-3.3.0-1.el6.noarch
ovirt-host-deploy-1.1.1-1.el6.noarch
ovirt-engine-cli-3.3.0.4-1.el6.noarch
ovirt-engine-userportal-3.3.0-1.el6.noarch
ovirt-engine-tools-3.3.0-1.el6.noarch
ovirt-engine-setup-3.3.0-4.el6.noarch
ovirt-engine-sdk-python-3.3.0.6-1.el6.noarch
ovirt-image-uploader-3.3.0-1.el6.noarch
ovirt-engine-restapi-3.3.0-1.el6.noarch
ovirt-engine-webadmin-portal-3.3.0-1.el6.noarch
ovirt-host-deploy-java-1.1.1-1.el6.noarch
ovirt-engine-backend-3.3.0-1.el6.noarch
ovirt-release-el6-8-1.noarch
ovirt-iso-uploader-3.3.0-1.el6.noarch
ovirt-engine-dbscripts-3.3.0-1.el6.noarch
ovirt-engine-lib-3.3.0-4.el6.noarch
>> Today I was playing around with snapshots, when I noticed that the
>> Snapshots panel didn't show any of the snapshots I created, not even the
>> 'Current - Active VM' snapshot that all VMs have.
>
> Not sure why this has happened. How do you know that snapshot
> creation was completed? Did you look at the events tab? (Asking to be
> sure) engine.log will be quite helpful here.
I find engine.log somewhat hard to read, to be honest, and documentation
is hard to find, but I think I found some clues.
I tried to create 4 snapshots of a certain VM, 2 of which completed
normally and 2 of which failed:
"Failed with VDSM error SNAPSHOT_FAILED and code 48"
However, what I find most upsetting, is that the VMs that disappeared
were not the subject of my experiments. I was creating snapshots of a
single VM, and the VMs that disappeared were unrelated. As a matter of
fact, the VM I was experimenting with IS THE ONLY ONE that survived.
By the way, the Snapshots panel has been displaying snapshots correctly
for a while, but when I logged in this morning, it appeared empty again,
for all VMs.
Is there anything I can check to see what causes this?
>> Not sure what to do, I decided to restart the ovirt-engine process.
>>
>> When I logged back on to the administrator panel, I was shocked to
>> see 2endWith of my 4 VMs completely missing from the inventory. I
>> haven't been able to find back a single trace of either machine,
>> neither in the portal nor on disk. It seems like they never
>> existed. The storage of both VMs seems to be erased from the data
>> domain.
> Not sure why storage domain was erased. About Vms disappeared - there
> were previous discussions on that at users(a)ovirt.org. In a nutshell,
> due to a bug (that was already fixed) prior to the restart you might
> have had records at the table that contained value of
> "empty guid" (a string in UUID format with only 0 and - ) at the
> vdsm_task_id_column. This means that the task is not associated with
> a real SPM task, and when the engine restarts, if for a given flow
> (let's say - snapshot creation) there are tasks with such
> vdsm_task_id, the flow will end with failure. For some flows ,
> ending with failure means erasing the vm (for example - real failure
> of importing a vm). By the way, similar issue can probably occur with
> disks as well, as there are flows that run async tasks that deal with
> disks.
I think I have an idea about what happended now.
The 2 disappeared VMs have been imported into oVirt using virt-v2v. The
3rd one that's now missing a disk volume was not, but I have been
playing with storage migration in the past.
Yesterday's engine.log seems to suggest, that all of these tasks
(importing the 2 VMs and trying to move a volume) have been restarted
immediately after restarting Engine. After failure, the VMs and volume
were removed. It seems to fit the above description of the bug.
So...
What can I do to prevent this from happening again?
Should I periodically check the 'async_tasks' table for anomalies? Is
there a bugfix I can apply, or should I wait for a new release of oVirt?
If the latter, when is that expected to happen?
Thanks,
Martijn.
11 years, 1 month
[Users] Ovirt guest agent for 3.2 el6
by noc
Is it possible to add an ovirt-guest-agent-1.0.8-el6.rpm to the ovirt
3.2 repository?
I'm asking because I tried the ovirt-guest-agent installation on a VM by
slightly modifying the repo file to point to the 3.3 directory and the
dependencies that were used were only from epel.
Regards,
Joop
11 years, 1 month
