[ovirt-users] VM Live Migration issues

Anantha Raghava raghav at exzatechconsulting.com
Tue Aug 30 02:28:08 UTC 2016


Hi,

Unfortunately not. Engine log may be there, if it is not rotated 
already. But VDSM logs are not there at all.

I have two more servers of the same configuration. Let me try & simulate 
the same situation.

-- 

Thanks & Regards,


Anantha Raghava

eXza Technology Consulting & Services


Do not print this e-mail unless required. Save Paper & trees.
On Monday 29 August 2016 12:54 PM, Yaniv Kaul wrote:
> 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 <mailto: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
>>>     <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 <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 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
>>>>
>>>>
>>>>
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>>>>             Users at ovirt.org <mailto:Users at ovirt.org>
>>>>             http://lists.ovirt.org/mailman/listinfo/users
>>>>             <http://lists.ovirt.org/mailman/listinfo/users>
>>>>
>>>>
>>>
>>>
>>
>
>
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