libvirt users - Oct 2012 - Libvirt mpiexec networking issue

Hi all,

Not sure if this is the best place to put this question since I'm not sure
if it's a Libvirt issue but...

I currently have two VMs up with networking and I can successfully ssh to
and from each VM and I have confirmed that I can successfully download
things from the internet. However, when trying to run mpiexec (which uses
ssh), the connection fails and gives me the following errors:

[proxy:0:0 at guestVM] HYDU_sock_connect (./utils/sock/sock.c:188): unable to
connect from "guestVM" to "guestVM" (Connection refused)
[proxy:0:0 at guestVM] main (./pm/pmiserv/pmip.c:205): unable to connect to
server guestVM at port 56514 (check for firewalls!)

Just so it is clear, I know that the two guests host names are the same
(they are clones) but I am giving explicit IP address for the connection so
it should not be an issue. Does any one know if there is something unique
with how Libvirt networking is set up that would cause such an error? I
have tried checking for firewalls and there don't seem to be any.

Thanks,
Shawn

-- 
Virginia Tech
Bradley Department of Electrical and Computer Engineering
B.S. Electrical Engineering
B.S. Computer Engineering
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Hi again,

I guess I should specify my current network setup. I used the default
network settings and both of the VMs include the following in their XML
configuration files:

<interface type='network'>
      <mac address='52:54:00:2f:a5:58'/>
      <source network='default'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x03'
function='0x0'/>
</interface>

Also, when I do ifconfig on the guest VMs I just get an eth0 and an lo
interface. (I have seen on the Libvirt networking pages something about the
virbr0 interface but I'm not sure if that is what I need or how to set it
up)

Thanks in advance for your help.

Shawn


On Fri, Oct 12, 2012 at 8:53 AM, Shawn Furrow <sfurrow at vt.edu> wrote:
> Hi all,
>
> Not sure if this is the best place to put this question since I'm not
sure
> if it's a Libvirt issue but...
>
> I currently have two VMs up with networking and I can successfully ssh to
> and from each VM and I have confirmed that I can successfully download
> things from the internet. However, when trying to run mpiexec (which uses
> ssh), the connection fails and gives me the following errors:
>
> [proxy:0:0 at guestVM] HYDU_sock_connect (./utils/sock/sock.c:188): unable
> to connect from "guestVM" to "guestVM" (Connection
refused)
> [proxy:0:0 at guestVM] main (./pm/pmiserv/pmip.c:205): unable to connect to
> server guestVM at port 56514 (check for firewalls!)
>
> Just so it is clear, I know that the two guests host names are the same
> (they are clones) but I am giving explicit IP address for the connection so
> it should not be an issue. Does any one know if there is something unique
> with how Libvirt networking is set up that would cause such an error? I
> have tried checking for firewalls and there don't seem to be any.
>
> Thanks,
> Shawn
>
> --
> Virginia Tech
> Bradley Department of Electrical and Computer Engineering
> B.S. Electrical Engineering
> B.S. Computer Engineering
>
>

-- 
Virginia Tech
Bradley Department of Electrical and Computer Engineering
B.S. Electrical Engineering
B.S. Computer Engineering
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