xen discuss - Aug 2007 - Question(s) about the new smxgate-66 with fedora 6 DomU

Hi all,

I''ve try the installation of fedora 6 DomU successfuly, but
I''ve some problems, so maybe you can help me.
First : during the installation, the guest don''t find the NFS server
when I use DHCP client, but it''s okay with an ip fix.
Second : I use DHCP client for the guest (who gives me DNS informations, default
gw and so on). But, the nslookup, ip resolution doesn''t work. I can
ping my DNS servers, but that''s all.
Third : If I halt the guest (with halt or shutdown), xm commands in Dom0
don''t work anymore. Ad event if I restart all xctl smf, I
can''t reboot the guest.
Any idea ?
 
 
This message posted from opensolaris.org

On Thu, Aug 02, 2007 at 01:05:02PM -0700, Stephane Beuret
wrote:
> I''ve try the installation of fedora 6 DomU successfuly, but
I''ve
> some problems, so maybe you can help me.
Stephane, are you installing a paravirtualised (PV) guest or fully
virtualised (HVM) ?

dme.

My computer doesn''t support HVM, so it''s just a PV guest...
 
 
This message posted from opensolaris.org

On Thu, Aug 02, 2007 at 01:05:02PM -0700, Stephane Beuret
wrote:
> I''ve try the installation of fedora 6 DomU successfuly, but
I''ve
> some problems, so maybe you can help me.
> First : during the installation, the guest don''t find the NFS
server
> when I use DHCP client, but it''s okay with an ip fix.
> Second : I use DHCP client for the guest (who gives me DNS
> informations, default gw and so on). But, the nslookup, ip
> resolution doesn''t work. I can ping my DNS servers, but
that''s all.
> Third : If I halt the guest (with halt or shutdown), xm commands in
> Dom0 don''t work anymore. Ad event if I restart all xctl smf, I
can''t
> reboot the guest.
I don''t have any personal experience installing a PV Fedora domU,
though others here have done so I believe.

Can you tell us about the configuration of your dom0 machine? What
hardware it contains, etc.

dme.

David Edmondson wrote:
> On Thu, Aug 02, 2007 at 01:05:02PM -0700, Stephane Beuret wrote:
>> I''ve try the installation of fedora 6 DomU successfuly, but
I''ve
>> some problems, so maybe you can help me.
>> First : during the installation, the guest don''t find the NFS
server
>> when I use DHCP client, but it''s okay with an ip fix.
>> Second : I use DHCP client for the guest (who gives me DNS
>> informations, default gw and so on). But, the nslookup, ip
>> resolution doesn''t work. I can ping my DNS servers, but
that''s all.
Both of those work fine for me. DNS from the DHCP response
works fine from Fedora7 install and a Solaris and Fedora
guest.

I disable IPv6 on all my setups, but I don''t think that
should matter either way.

>> Third : If I halt the guest (with halt or shutdown), xm commands in
>> Dom0 don''t work anymore. Ad event if I restart all xctl smf, I
can''t
>> reboot the guest.
After you get into this, do you see any errors at the end of
/var/log/xen/xend-debug.log or /var/log/xen/xend.log?




Thanks,

MRJ

> I don''t have any personal experience installing a PV Fedora domU,
> though others here have done so I believe.
> 
> Can you tell us about the configuration of your dom0 machine? What
> hardware it contains, etc.
> 
> dme.
> _______________________________________________
> xen-discuss mailing list
> xen-discuss@opensolaris.org
-- 
Mark Johnson <mark.johnson@sun.com>
Sun Microsystems, Inc.
(781) 442-0869

On 8/2/07, Stephane Beuret <stephane.beuret@gmail.com>
wrote:
> Second : I use DHCP client for the guest (who gives me DNS informations,
default gw and so on). But, the nslookup, ip resolution doesn''t work. I
can ping my DNS servers, but that''s all.
What type of NIC does the machine have installed (i.e. what drivers)?
I had a somewhat similar issue that was caused (as far as I can tell)
by somewhat shoddy ethernet drivers (or substandard ethernet chipset).
 The issue ended up being that the domU was expecting the hardware to
fill in the checksums for IP and UDP traffic, but for some reason the
hardware wasn''t doing so.

As a workaround, David gave me a line to put in /etc/system on the
domU to tell it not to offload the checksumming to the hardware.  This
fixed the issue for me.  The line was:

set xnf:xnf_cksum_offload = 0

Now, I''m not sure if this is the same issue you are having or not...
If you want to try it, add that to /etc/system in the domU and reboot
the domU.

On Tue, Aug 07, 2007 at 10:47:19AM -0400, Gavin Hurlbut
wrote:
> On 8/2/07, Stephane Beuret <stephane.beuret@gmail.com> wrote:
> > Second : I use DHCP client for the guest (who gives me DNS
informations, default gw and so on). But, the nslookup, ip resolution
doesn''t work. I can ping my DNS servers, but that''s all.
> 
> What type of NIC does the machine have installed (i.e. what drivers)?
> I had a somewhat similar issue that was caused (as far as I can tell)
> by somewhat shoddy ethernet drivers (or substandard ethernet chipset).
>  The issue ended up being that the domU was expecting the hardware to
> fill in the checksums for IP and UDP traffic, but for some reason the
> hardware wasn''t doing so.
> 
> As a workaround, David gave me a line to put in /etc/system on the
> domU to tell it not to offload the checksumming to the hardware.  This
> fixed the issue for me.  The line was:
> 
> set xnf:xnf_cksum_offload = 0
> 
> Now, I''m not sure if this is the same issue you are having or
not...
> If you want to try it, add that to /etc/system in the domU and reboot
> the domU.
If I understood Stephane correctly he''s trying to get a Fedora domU to
run on a Solaris dom0, so that approach won''t have any effect.

dme.

> If I understood Stephane correctly he''s trying to get a Fedora
domU to
> run on a Solaris dom0, so that approach won''t have any effect.
Heh.  So sorry...   I should have waited until after my first coffee.  My bad.

There are similar things that can likely be done on the Linux side if
needed though, should that somehow be the actual issue.

That being said, I think I''ll get back to my coffee.  Pardon me for
being a bonehead :)