5:58 a.m.
Hi,
I am adding a disk to my KVM virtual server, but for some reason it refuses
to honor the <address>
I have tried the following 3:
<disk type='block' device='disk'>
<driver name='phy' type='raw'/>
<source dev='/dev/nbd2'/>
<target dev='vdb' bus='virtio'/>
<serial>my-fake-serial</serial>
<address type='drive' controller='0' bus='1'
target='3' unit='2'/>
</disk>
<disk type='block' device='disk'>
<driver name='phy' type='raw'/>
<source dev='/dev/nbd2'/>
<target dev='vdb' bus='virtio'/>
<serial>my-fake-serial</serial>
<address type='pci' bus='0x00' slot='0x08'
function='0x0'/>
</disk>
<disk type='block' device='disk'>
<driver name='phy' type='raw'/>
<source dev='/dev/nbd2'/>
<target dev='vdb' bus='virtio'/>
<serial>my-fake-serial</serial>
<address type='virtio-serial' controller='0' bus='0'
port='8'/>
</disk>
I would assume the last one is the one to use, as I am using a "virtio"
bus. However, the <address> attribute is simply ignored and the disk is
always attached as this:
pci-0000:00:05.0
Further, how do I read the "my-fake-serial" from within the virtual machine?
I have tried using this:
udevadm info -a -p $(udevadm info -q path -n /dev/vdb)
But it does not show the serial string there anywhere.
Regards,
Daniele
7:29 p.m.
On 04/08/2013 11:58 PM, Daniele Testa wrote:
Hi,
I am adding a disk to my KVM virtual server, but for some reason it refuses
to honor the <address>
I have tried the following 3:
<disk type='block' device='disk'>
<driver name='phy' type='raw'/>
<source dev='/dev/nbd2'/>
<target dev='vdb' bus='virtio'/>
<serial>my-fake-serial</serial>
<address type='drive' controller='0' bus='1'
target='3' unit='2'/>
</disk>
<disk type='block' device='disk'>
<driver name='phy' type='raw'/>
<source dev='/dev/nbd2'/>
<target dev='vdb' bus='virtio'/>
<serial>my-fake-serial</serial>
<address type='pci' bus='0x00' slot='0x08'
function='0x0'/>
</disk>
<disk type='block' device='disk'>
<driver name='phy' type='raw'/>
<source dev='/dev/nbd2'/>
<target dev='vdb' bus='virtio'/>
<serial>my-fake-serial</serial>
<address type='virtio-serial' controller='0' bus='0'
port='8'/>
</disk>
I would assume the last one is the one to use, as I am using a "virtio"
bus. However, the <address> attribute is simply ignored and the disk is
always attached as this:
pci-0000:00:05.0
Further, how do I read the "my-fake-serial" from within the virtual machine?
The serial for vdb for example is in /sys/class/block/vdb/serial
I know I haven't helped with the addresses, don't know much about that,
but try attaching your libvirt version and the log of
/var/log/libvirt/qemu/<machine_name>.log.
I'll see when I'll get to you. Maybe somebody will found out in the
meantime. If not, feel free to create a bug for this.
Martin
9:19 p.m.
Hi,
Actually, the serial is not there :)
root@ubuntu:/sys/class/block/vdi# fdisk -l
Disk /dev/vda: 7516 MB, 7516192768 bytes
4 heads, 32 sectors/track, 114688 cylinders
Units = cylinders of 128 * 512 = 65536 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000bb520
Device Boot Start End Blocks Id System
/dev/vda1 * 17 114688 7339008 83 Linux
Disk /dev/vdi: 1073 MB, 1073741824 bytes
16 heads, 63 sectors/track, 2080 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x525f45d3
Device Boot Start End Blocks Id System
/dev/vdi1 1 2080 1048288+ 83 Linux
root@ubuntu:/sys/class/block/vdi# ls -al
total 0
drwxr-xr-x 8 root root 0 2013-04-08 21:51 .
drwxr-xr-x 3 root root 0 2013-04-08 21:51 ..
-r--r--r-- 1 root root 4096 2013-04-08 21:51 alignment_offset
lrwxrwxrwx 1 root root 0 2013-04-08 21:51 bdi ->
../../../../../virtual/bdi/252:128
-r--r--r-- 1 root root 4096 2013-04-08 21:51 capability
-r--r--r-- 1 root root 4096 2013-04-09 13:09 dev
lrwxrwxrwx 1 root root 0 2013-04-08 21:51 device -> ../../../virtio9
-r--r--r-- 1 root root 4096 2013-04-08 21:51 ext_range
drwxr-xr-x 2 root root 0 2013-04-08 21:51 holders
-r--r--r-- 1 root root 4096 2013-04-08 21:51 inflight
drwxr-xr-x 2 root root 0 2013-04-08 21:51 power
drwxr-xr-x 3 root root 0 2013-04-08 21:51 queue
-r--r--r-- 1 root root 4096 2013-04-08 21:51 range
-r--r--r-- 1 root root 4096 2013-04-08 21:51 removable
-r--r--r-- 1 root root 4096 2013-04-08 21:51 ro
-r--r--r-- 1 root root 4096 2013-04-08 21:51 size
drwxr-xr-x 2 root root 0 2013-04-08 21:51 slaves
-r--r--r-- 1 root root 4096 2013-04-08 21:51 stat
lrwxrwxrwx 1 root root 0 2013-04-08 21:51 subsystem ->
../../../../../../class/block
drwxr-xr-x 2 root root 0 2013-04-08 21:51 trace
-rw-r--r-- 1 root root 4096 2013-04-08 21:51 uevent
drwxr-xr-x 5 root root 0 2013-04-08 21:51 vdi1
(root@h2)-(/var/log/libvirt/qemu)# virsh dumpxml vps_99
<domain type='kvm' id='231'>
<name>vps_99</name>
<uuid>8d19d3a4-f1b4-1030-ac57-0050560018a2</uuid>
<memory>1048576</memory>
<currentMemory>1048576</currentMemory>
<vcpu>2</vcpu>
<os>
<type arch='x86_64' machine='pc-0.12'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='utc'/>
<on_poweroff>restart</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='block' device='disk'>
<driver name='qemu' type='raw'/>
<source dev='/dev/nbd1'/>
<target dev='vda' bus='virtio'/>
</disk>
<disk type='block' device='disk'>
<driver name='phy' type='raw'/>
<source dev='/dev/nbd2'/>
<target dev='vdb' bus='virtio'/>
<serial>my-fake-serial</serial>
</disk>
<interface type='bridge'>
<mac address='00:50:56:00:1b:24'/>
<source bridge='br0'/>
<target dev='vnet3'/>
<model type='virtio'/>
</interface>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5999' autoport='no'
keymap='en-us'/>
<video>
<model type='cirrus' vram='9216' heads='1'/>
</video>
</devices>
<seclabel type='dynamic' model='apparmor'>
<label>libvirt-8d19d3a4-f1b4-1030-ac57-0050560018a2</label>
<imagelabel>libvirt-8d19d3a4-f1b4-1030-ac57-0050560018a2</imagelabel>
</seclabel>
</domain>
Btw, as you can see in the XML, libvirt and/or KVM is completely ignoring
my target="vdb" and attaches the drive to "/dev/vdi" inside the
virtual
server.
(root@h2)-(/)# virsh --version
0.7.5
(root@h2)-(/)# kvm --version
QEMU PC emulator version 0.12.3 (qemu-kvm-0.12.3), Copyright (c) 2003-2008
Fabrice Bellard
The log-file only shows the command used to start the virtual server. It
does not contain any of the commands I used to attache the additional disk.
Regards,
Daniele
2013/4/9 Martin Kletzander <mkletzan(a)redhat.com>
On 04/08/2013 11:58 PM, Daniele Testa wrote:
> Hi,
>
> I am adding a disk to my KVM virtual server, but for some reason it
refuses
> to honor the <address>
>
> I have tried the following 3:
>
> <disk type='block' device='disk'>
> <driver name='phy' type='raw'/>
> <source dev='/dev/nbd2'/>
> <target dev='vdb' bus='virtio'/>
> <serial>my-fake-serial</serial>
> <address type='drive' controller='0' bus='1'
target='3' unit='2'/>
> </disk>
>
>
> <disk type='block' device='disk'>
> <driver name='phy' type='raw'/>
> <source dev='/dev/nbd2'/>
> <target dev='vdb' bus='virtio'/>
> <serial>my-fake-serial</serial>
> <address type='pci' bus='0x00' slot='0x08'
function='0x0'/>
> </disk>
>
>
> <disk type='block' device='disk'>
> <driver name='phy' type='raw'/>
> <source dev='/dev/nbd2'/>
> <target dev='vdb' bus='virtio'/>
> <serial>my-fake-serial</serial>
> <address type='virtio-serial' controller='0'
bus='0' port='8'/>
> </disk>
>
> I would assume the last one is the one to use, as I am using a "virtio"
> bus. However, the <address> attribute is simply ignored and the disk is
> always attached as this:
>
> pci-0000:00:05.0
>
> Further, how do I read the "my-fake-serial" from within the virtual
machine?
>
The serial for vdb for example is in /sys/class/block/vdb/serial
I know I haven't helped with the addresses, don't know much about that,
but try attaching your libvirt version and the log of
/var/log/libvirt/qemu/<machine_name>.log.
I'll see when I'll get to you. Maybe somebody will found out in the
meantime. If not, feel free to create a bug for this.
Martin
9:52 p.m.
[please don't top-post on technical lists]
On 04/09/2013 03:19 PM, Daniele Testa wrote:
Hi,
Actually, the serial is not there :)
Works for me, but that's a new qemu, new libvirt and new fedora guest,
see below.
Btw, as you can see in the XML, libvirt and/or KVM is completely
ignoring
my target="vdb" and attaches the drive to "/dev/vdi" inside the
virtual
server.
Yes, this is an issue, but we do state in the documentation that the
target attribute is just a hint as to where to plug the disk and we
currently cannot guarantee the disk name precisely.
(root@h2)-(/)# virsh --version
0.7.5
This version is very old and even though the serial element is
supported, ...
(root@h2)-(/)# kvm --version
QEMU PC emulator version 0.12.3 (qemu-kvm-0.12.3), Copyright (c) 2003-2008
Fabrice Bellard
... it might not be for such old qemu.
The log-file only shows the command used to start the virtual server.
It
does not contain any of the commands I used to attache the additional disk.
And that command would help identify whether we start qemu with the
serial parameter (which I doubt with such old implementation) or not.
Regards,
Daniele
2013/4/9 Martin Kletzander <mkletzan(a)redhat.com>
> On 04/08/2013 11:58 PM, Daniele Testa wrote:
>> Hi,
>>
>> I am adding a disk to my KVM virtual server, but for some reason it
> refuses
>> to honor the <address>
>>
>> I have tried the following 3:
>>
>> <disk type='block' device='disk'>
>> <driver name='phy' type='raw'/>
>> <source dev='/dev/nbd2'/>
>> <target dev='vdb' bus='virtio'/>
>> <serial>my-fake-serial</serial>
>> <address type='drive' controller='0' bus='1'
target='3' unit='2'/>
>> </disk>
>>
>>
>> <disk type='block' device='disk'>
>> <driver name='phy' type='raw'/>
>> <source dev='/dev/nbd2'/>
>> <target dev='vdb' bus='virtio'/>
>> <serial>my-fake-serial</serial>
>> <address type='pci' bus='0x00' slot='0x08'
function='0x0'/>
>> </disk>
>>
>>
>> <disk type='block' device='disk'>
>> <driver name='phy' type='raw'/>
>> <source dev='/dev/nbd2'/>
>> <target dev='vdb' bus='virtio'/>
>> <serial>my-fake-serial</serial>
>> <address type='virtio-serial' controller='0'
bus='0' port='8'/>
>> </disk>
>>
>> I would assume the last one is the one to use, as I am using a
"virtio"
>> bus. However, the <address> attribute is simply ignored and the disk is
>> always attached as this:
>>
>> pci-0000:00:05.0
>>
>> Further, how do I read the "my-fake-serial" from within the virtual
> machine?
>>
>
> The serial for vdb for example is in /sys/class/block/vdb/serial
>
> I know I haven't helped with the addresses, don't know much about that,
> but try attaching your libvirt version and the log of
> /var/log/libvirt/qemu/<machine_name>.log.
> I'll see when I'll get to you. Maybe somebody will found out in the
> meantime. If not, feel free to create a bug for this.
>
> Martin
>
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