[ovirt-devel] Unstable network connections after installing vdsm

[Adam Litke]

On 10/11/14 11:19 -0500, Ondřej Svoboda wrote:
>Hi Adam,
>
>there are some known issues, which depend on versions of software you are running.
>
>If you are using EL7 (or Fedoras?) you may want to switch SELinux to permissive mode and turn off NetworkManager (both are separate problems with bugs open for them [1, 2]). Then give it another go. I think this could be your case. Please begin with NM, which is my suspect.
>
>If you are on EL6 you might be experiencing the traffic control (tc) utility or even the kernel not supporting certain commands. I came to looking at this problem finally so I might be able to sort it out (or ask Toni for help).
>
>In the mean time, could you let us know what version of VDSM, selinux-policy and NetworkManager you are running? Could you attach /var/log/vdsm/supervdsm.log and /var/log/vdsm/vdsm.log? Does someting (NetworkManager!) in the journal seem fishy?

I spoke too soon :(  Happened again on my box.  Please see
https://bugzilla.redhat.com/show_bug.cgi?id=1162844 for a bug that I
created to track this.  I've uploaded the vdsm.log and supervdsm.log
files too.

>
>Thanks,
>Ondra
>
>[1] https://bugzilla.redhat.com/show_bug.cgi?id=1138731 (I'll ask them for _working_ RPMs)
>[2] https://bugzilla.redhat.com/show_bug.cgi?id=1136843 (NetworkManager seems to touch more than we want)
>
>On 10.11.2014 15:34, Adam Litke wrote:
>> I've been experiencing peculiar and annoying networking behavior on my
>> oVirt development hosts and I'm hoping someone familiar with vdsm
>> networking configuration can help me get to the bottom of it.
>>
>> My setup is two mini-Dells acting as virt hosts and ovirt engine
>> running on my laptop.  The dells get their network config from a
>> cobbler instance running on my laptop which also provides PXE
>> services.
>>
>> After freshly installing the dells, I get a nice, stable network
>> connection.  After installing vdsm, the connection seems to drop
>> occasionally.  I have visit the machine, log into the console, and
>> execute 'dhclient ovirtmgmt'.  This fixes the problem again for
>> awhile.
>>
>> Does this sound like anything someone has seen before?  What would be
>> the best way to start debugging/diagnosing this issue?  Thanks in
>> advance for your responses.

-- 
Adam Litke