[ovirt-users] VM Live Migration issues

[Yaniv Kaul]

Did you happen to save the logs? They might reveal the issue.
TIA,
Y.

On Sat, Aug 27, 2016 at 1:25 PM, Anantha Raghava <
raghav at exzatechconsulting.com> wrote:

> Hi,
>
> The migration is working fine with Cluster Switch set to "Legacy" Mode.
>
> But I have run into a different problem. Yesterday, for some reason, I had
> to restart the hosts. But the Hosts never came online. Hosts were
> constantly in Non Responsive state. I manually fenced it, and Vds command
> timed out.
>
> I found that NIC was down for some reason. I brought it up and again
> fenced the hosts. Again the Vds command timed out. I manually attempted to
> restart the VDSM service, but host reported there is no such service.
> Starting VDSMD service resulted in failure.
>
> Finally, I had to forcefully remove the hosts, reinstalled base (CentOS 7)
> on hosts and re-added them to oVirt with the storage domain intact. All
> hosts, storage domains went online and all VMs were intact.
>
> Post reinstallation, I set the Cluster Switch mode to "Legacy" and tried
> migration and it worked fine.
>
> I fail to understand what went wrong while rebooting the hosts.
>
> --
>
> Thanks & Regards,
>
>
> Anantha Raghava eXza Technology Consulting & Services
> Do not print this e-mail unless required. Save Paper & trees.
> On Friday 26 August 2016 10:12 PM, Anantha Raghava wrote:
>
> Hi,
>
> Then, I will switch the cluster switch type back to Legacy and then try to
> migrate. Will post the results here.
>
> Any other suggestions?
>
> --
>
> Thanks & Regards,
>
>
> Anantha Raghava eXza Technology Consulting & Services
>
>
> Do not print this e-mail unless required. Save Paper & trees.
> On Friday 26 August 2016 09:58 PM, Yaniv Dary wrote:
>
> OVS is experimental and there is a open item on making migration work:
> https://bugzilla.redhat.com/show_bug.cgi?id=1362495
>
> Yaniv Dary
> Technical Product Manager
> Red Hat Israel Ltd.
> 34 Jerusalem Road
> Building A, 4th floor
> Ra'anana, Israel 4350109
>
> Tel : +972 (9) 7692306
>         8272306
> Email: ydary at redhat.com
> IRC : ydary
>
>
> On Fri, Aug 26, 2016 at 11:25 AM, Anantha Raghava <
> raghav at exzatechconsulting.com> wrote:
>
>> Hi,
>>
>> Not at all.
>>
>> Just newly created Virtual Machine. No user is accessing the VM yet. Only
>> Ubuntu Trusty Tahr (14.04) OS with oVirt Guest Agent is installed. VM and
>> both hosts are in the same network as well.
>>
>> Applied migration policy is "Minimum Downtime". Bandwidth limit is set to
>> Auto. Cluster switch is set to "OVS" I can send the screen shot tomorrow.
>>
>> Host Hardware configuration. Intel Xeon CPU, 2 Socket X 16 Core in each
>> socket. Installed Memory is 256 GB on each host. I have 4 X 10Gbps NIC, 2
>> given for VM traffic and 2 given for iSCSI traffic. oVirt Management is on
>> a separate 1 X 1Gbps NIC.
>>
>> Yet, migration fails.
>>
>> --
>>
>> Thanks & Regards,
>>
>>
>> Anantha Raghava eXza Technology Consulting & Services
>>
>> Do not print this e-mail unless required. Save Paper & trees.
>> On Friday 26 August 2016 09:31 PM, Yaniv Dary wrote:
>>
>> Is the VM very busy?
>> Did you apply the new cluster migration policies?
>>
>> Yaniv Dary
>> Technical Product Manager
>> Red Hat Israel Ltd.
>> 34 Jerusalem Road
>> Building A, 4th floor
>> Ra'anana, Israel 4350109
>>
>> Tel : +972 (9) 7692306
>>         8272306
>> Email: ydary at redhat.com
>> IRC : ydary
>>
>>
>> On Fri, Aug 26, 2016 at 1:54 AM, Anantha Raghava <
>> raghav at exzatechconsulting.com> wrote:
>>
>>> Hi,
>>>
>>> In our setup we have configured two hosts, both of same CPU type, same
>>> amount of memory and Master storage domain is created on iSCSI storage and
>>> is live.
>>>
>>> I created a single VM with Ubuntu Trusty as OS. It installed properly
>>> and when I attempted to migrate the running VM, the migration failed.
>>>
>>> Engine log, Host 1 log and Host 2 logs are attached for your reference.
>>> Since logs are running into several MBs, I have compressed them and
>>> attached here.
>>>
>>> Can someone help us to solve this issue?
>>>
>>> --
>>>
>>> Thanks & Regards,
>>> Anantha Raghava
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>>
>>
>>
>
>
>
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