[ovirt-users] VM Live Migration issues

[Anantha Raghava]

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


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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 <mailto:ydary at redhat.com> IRC 
>> : ydary
>>
>> On Fri, Aug 26, 2016 at 11:25 AM, Anantha Raghava 
>> <raghav at exzatechconsulting.com 
>> <mailto: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 <tel:%2B972%20%289%29%207692306> 8272306
>>>     Email: ydary at redhat.com <mailto:ydary at redhat.com> IRC : ydary
>>>
>>>     On Fri, Aug 26, 2016 at 1:54 AM, Anantha Raghava
>>>     <raghav at exzatechconsulting.com
>>>     <mailto: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 <mailto:Users at ovirt.org>
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>>>         <http://lists.ovirt.org/mailman/listinfo/users>
>>>
>>>
>>
>>
>

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