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RE: [Xen-users] Building from Source

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-users] Building from Source
From: jonr@xxxxxxxxxx
Date: Fri, 24 Oct 2008 14:27:21 -0800
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Are you using this config file for your domu?

name = "lb1"
builder = "hvm"
memory = "512"
device_model = "/usr/lib/xen/bin/qemu-dm"
kernel = "/usr/lib/xen/boot/hvmloader"
#disk = ['phy:/dev/loop0,hda,w']
boot="c"
acpi="0"
serial = "pty"
vncpasswd = "test"

I found this in one of your previous emails to the list. I used this to see if I could replicate your problem. Using the config file for domu that you supplied I get the exact same results on a working xen3.3 box.

You are trying to use the loop device for a disk for a hvm machine. You are using 'boot="c"' when there is nothing on the "disk". You need a line like this:

disk=['phy:/dev/rootvg/nathan,hda,w','file:/home/jonr/nevaeh-i386.iso,hdc:cdrom,r']

I am using your config file and booting just fine. Your problem is your "disk=" line in your config file. I am using LVM's in this example but you could also use file based "disks".

When I use the config file you supplied on the list I get the exact same errors in /var/log/xen/qemu-dm-lb1.log.

You do not want to use /dev/loop0 as a disk.

Jon

Quoting Nathan Eisenberg <nathan@xxxxxxxxxxxxxxxx>:

Jon,

I guess I didn't explain clearly...

I cannot get a DomU to stay in a running state. It doesn't matter if there is a disk attached or not, the DomU dies almost instantly.

Thank You,
Nathan Eisenberg
Sr. Systems Administrator
Atlas Networks, LLC


-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of jonr@xxxxxxxxxx
Sent: Friday, October 24, 2008 12:13 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-users] Building from Source

Quoting Nathan Eisenberg <nathan@xxxxxxxxxxxxxxxx>:

Jon,

As I mentioned - the disk line seems to have no effect on whether or
 not the DomU boots.  Even with no disk line, I get the same
results.   The loop device was just a temporary contrivance for
testing, but  is definitely not the cause of the issue.

Nathan,

Using your config file I can get the same results on a known working
dom0. Whether I have the disk line in or not, when I boot the domu
this is what I see:

root@xenproof:/etc/xen# xm create nathan
Using config file "./nathan".
Started domain lb1

root@xenproof:/etc/xen# xm list
Name                                        ID   Mem VCPUs      State
  Time(s)
Domain-0 0 2367 2 r----- 2073.1 domutest 12 512 1 r----- 3662.0

Is this what you are seeing as well?

What OS is on loop0? Did you already install an OS onto that device? I
went back through the archives and couldn't find the email that said
you had already done that. I may have missed it though.

Jon



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