9:15 a.m.
On Thu, Jan 03, 2013 at 01:05:00PM +0100, Frank Wall wrote:
<cdroms>
<cdrom href="/api/vms/VM-ID/cdroms/00000000-0000-0000-0000-000000000000"
id="00000000-0000-0000-0000-000000000000">
<vm href="/api/vms/VM-ID" id="VM-ID"/>
<file id="FreeBSD-8.3-RELEASE-amd64-disc1.iso"/>
</cdrom>
</cdroms>
...and the boot device is also changed...
[...]
<os type="unassigned">
<boot dev="cdrom"/>
</os>
[...]
...but the VM won't boot off the CD-ROM device, instead it just
boots from the first harddisk. So what am I doing wrong?
OK, the problem is still NOT solved, but I did some further
investigation. First, the problem ONLY affects VMs with a bootable
harddisk (and an operating system installed).
A newly created VM is NOT affected and is able to boot from CD-ROM.
Once I install an operating system, the VM will no longer be able
to boot from CD-ROM. No matter what is configured as boot device...
There is still only the following workaround to boot from CD-ROM:
The only way I am able to boot from CD-ROM is when using the
"Run once" function on the Admin Portal and configure the CD-ROM
device/image there (temporarely overwriting my config).
It will NOT work if I configure the CD-ROM device through the REST
API or the Admin Portal. Just "Run Once" will do the right thing.
Any idea how to debug this further and get a bugfix/working solution?
oVirt is running fine, except this annoying bug makes it somewhat
useless for us.
Thanks
- Frank
10:03 a.m.
On Thu, Feb 07, 2013 at 03:15:57PM +0100, Frank Wall wrote:
Any idea how to debug this further and get a bugfix/working solution?
Using virsh and the "dumpxml" command on the oVirt node I was able
to find the reason for the cd-rom boot problems: the qemu/libvirt
configuration differs. Have a look at this diff...
--- virsh_normalboot 2013-02-07 15:47:02.584415306 +0100
+++ virsh_runonce 2013-02-07 15:48:49.141540166 +0100
@@ -18,7 +18,6 @@
</sysinfo>
<os>
<type arch='x86_64' machine='pc-0.14'>hvm</type>
- <boot dev='hd'/>
<smbios mode='sysinfo'/>
</os>
<features>
@@ -43,6 +42,7 @@
</source>
<target dev='hda' bus='ide'/>
<serial>049339aa-1dd6-4cd7-8c43-cc9bac91a963</serial>
+ <boot order='2'/>
<alias name='ide0-0-0'/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</disk>
@@ -54,6 +54,7 @@
<target dev='hdc' bus='ide'/>
<readonly/>
<serial></serial>
+ <boot order='1'/>
<alias name='ide0-1-0'/>
<address type='drive' controller='0' bus='1'
target='0' unit='0'/>
</disk>
@@ -74,6 +75,7 @@
<source bridge='VMLAN'/>
<target dev='vnet0'/>
<model type='e1000'/>
+ <boot order='3'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x03' function='0x0'/>
</interface>
First, I configured my VM through the REST API: "virsh_normalboot".
The second attempt was the "Run Once" feature from the Admin Panel:
"virsh_runonce".
As you can see this results in different qemu/libvirt configurations, although
I did configure the exactly same thing (boot order + attach cd-rom).
The strange thing is, that the ovirt engine REST API does NOT show any difference
in configuration for both scenarios. Look at the next diff...
(normalboot => configured through REST API; runonce => "Run Once" from
Admin Portal)
--- engine_normalboot 2013-02-07 15:06:38.366216092 +0100
+++ engine_runonce 2013-02-07 15:08:10.218213737 +0100
@@ -48,7 +48,7 @@
<host href="/api/hosts/3d534ee2-0c08-11e2-8edf-005056a76ea2"
id="3d534ee2-0c08-11e2-8edf-005056a76ea2"/>
<cluster href="/api/clusters/5c5ab34a-0be3-11e2-a0b8-005056a76ea2"
id="5c5ab34a-0be3-11e2-a0b8-005056a76ea2"/>
<template href="/api/templates/00000000-0000-0000-0000-000000000000"
id="00000000-0000-0000-0000-000000000000"/>
- <start_time>2013-02-07T13:56:55.906Z</start_time>
+ <start_time>2013-02-07T14:07:40.563Z</start_time>
<creation_time>2012-12-22T22:50:52.174+01:00</creation_time>
<origin>ovirt</origin>
<stateless>false</stateless>
Both files, "engine_normalboot" and "engine_runonce", are the results
of these queries:
curl --insecure -X GET -H "Accept: application/xml" -u admin@internal:password
https://ovirt-engine:8443/api/vms/0a388607-c971-4bfd-a0aa-3a20e967aa1e >> file
curl --insecure -X GET -H "Accept: application/xml" -u admin@internal:password
https://ovirt-engine:8443/api/vms/0a388607-c971-4bfd-a0aa-3a20e967aa1e/cd... >>
file
It seems oVirt Engine does not set the "boot dev" and "boot order"
attributes
correctly through libvirt in some cases. Is this a known bug?
Thanks
- Frank
2:59 p.m.
----- Original Message -----
From: "Frank Wall" <fwall(a)inotronic.de>
To: users(a)ovirt.org
Sent: Thursday, February 7, 2013 4:15:57 PM
Subject: [Users] Unable to boot from CD-ROM (was: REST API: Change boot device / attach
CD-ROM)
On Thu, Jan 03, 2013 at 01:05:00PM +0100, Frank Wall wrote:
> <cdroms>
> <cdrom
> href="/api/vms/VM-ID/cdroms/00000000-0000-0000-0000-000000000000"
> id="00000000-0000-0000-0000-000000000000">
> <vm href="/api/vms/VM-ID" id="VM-ID"/>
> <file id="FreeBSD-8.3-RELEASE-amd64-disc1.iso"/>
> </cdrom>
> </cdroms>
>
> ...and the boot device is also changed...
>
> [...]
> <os type="unassigned">
> <boot dev="cdrom"/>
> </os>
> [...]
>
> ...but the VM won't boot off the CD-ROM device, instead it just
> boots from the first harddisk. So what am I doing wrong?
OK, the problem is still NOT solved, but I did some further
investigation. First, the problem ONLY affects VMs with a bootable
harddisk (and an operating system installed).
A newly created VM is NOT affected and is able to boot from CD-ROM.
Once I install an operating system, the VM will no longer be able
to boot from CD-ROM. No matter what is configured as boot device...
There is still only the following workaround to boot from CD-ROM:
> The only way I am able to boot from CD-ROM is when using the
> "Run once" function on the Admin Portal and configure the CD-ROM
> device/image there (temporarely overwriting my config).
>
> It will NOT work if I configure the CD-ROM device through the REST
> API or the Admin Portal. Just "Run Once" will do the right thing.
Any idea how to debug this further and get a bugfix/working solution?
oVirt is running fine, except this annoying bug makes it somewhat
useless for us.
Hi Frank
It seems to me as a bug
can you please open a BZ on that with engine + vdsm logs attached.
Thanks
Thanks
- Frank
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