RE: [Fedora-xen] issues (part II)
by Steve Brueckner
Michael Weiner wrote:
> OK, i am trying to get ttylinux going, reading some posts and howto's
> etc...but cant get the domU running. My ttylinux config looks like
> this:
>
> kernel = "/boot/vmlinuz-2.6.19-1.2911.fc6xen"
> ramdisk = "/boot/initrd- 2.6.19-1.2911.fc6xen.img"
> memory = 64
> name = "ttylinux"
> vif = ['']
> dhcp = "dhcp"
> disk = ['file:/opt/xen/ttylinux/ttylinux-xen,sda1,w']
> root = "/dev/sda1 ro"
>
> and when i run xm create -c ttylinux.cfg i get the following after
> all the boot messages are done:
>
> Scanning logical volumes Reading all physical volumes. This may
> take a while... No volume groups found
> Activating logical volumes
> Volume group "VolGroup00" not found
> Creating root device.
> Mounting root filesystem.
> mount: could not find filesystem '/dev/root'
>
> i mounted the image and peeked at the fstab, i am unsure where the
> heck its getting VolGroup00 from. Can anyone lend any pointers to
> what i am doing wrong? I seem to get the same error no matter what
> pre-built image i am using.
I see you've identified the problem as a non-existant LVG. As you say,
we need to figure out where the heck the Xen guest is getting the idea
to look for the LVG. You said you looked at your guest's fstab...could
you post that for us?
However, if the reference to an LVG is not in the guest's GRUB (which
is the guest's config file) and not in the guest's disk image, then
maybe it's in the FC6 xen kernel or initrd? That doesn't make much
sense to me, but I do think that mixing an FC6 xen kernel with another
distro's image could be a problem.
You might want to try building a guest by copying your FC6 host's files.
This would provide consistency between your kernel and file system.
You would use dd to create an image, mkfs to give it an ext3 file system,
mount it, then copy and minorly edit the file system. Here's what I
used to do (after the above 3 steps):
# mkdir /mnt/{proc,sys,tmp,selinux}
# chmod 777 /mnt/tmp/
# cp -ax /{root,dev,var,etc,usr,bin,sbin,lib,home} /mnt
# cp /mnt/etc/modprobe.conf /mnt/etc/modprobe.conf.bak
# echo > /mnt/etc/modprobe.conf
# mv /mnt/etc/fstab /mnt/etc/fstab.bak
# vim /mnt/etc/fstab
/dev/sda1 / ext3 defaults 1 1
none /dev/pts devpts gid=5,mode=620 0 0
none /dev/shm tmpfs defaults 0 0
none /proc proc defaults 0 0
none /sys sysfs defaults 0 0
/dev/sda2 swap swap defaults 0 0
I don't like the FC5 or FC6 Xen how-to's because they rely on Red Hat's
buggy tools to build guests. I used to use the old FC4 how to because
it showed more under the hood:
http://fedoraproject.org/wiki/FedoraXenQuickstartFC4
Here's some other old ones (remember I use an older version and avoid
using the rpms):
http://mitopia.net/index.php/Xen_3.0.2_Setup
http://www.neotextus.org/computing/virtualization/xen-fc3
Steve Brueckner, ATC-NY
17 years, 1 month
issues (part II)
by Michael Weiner
OK, i am trying to get ttylinux going, reading some posts and howto's
etc...but cant get the domU running. My ttylinux config looks like this:
kernel = "/boot/vmlinuz-2.6.19-1.2911.fc6xen"
ramdisk = "/boot/initrd-2.6.19-1.2911.fc6xen.img"
memory = 64
name = "ttylinux"
vif = ['']
dhcp = "dhcp"
disk = ['file:/opt/xen/ttylinux/ttylinux-xen,sda1,w']
root = "/dev/sda1 ro"
and when i run xm create -c ttylinux.cfg i get the following after all the
boot messages are done:
Xen virtual console successfully installed as xvc0
Event-channel device installed.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
ide-floppy driver 0.99.newide
usbcore: registered new interface driver libusual
usbcore: registered new interface driver hiddev
usbcore: registered new interface driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
mice: PS/2 mouse device common for all mice
TCP bic registered
Initializing XFRM netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
Using IPI No-Shortcut mode
XENBUS: Device with no driver: device/vbd/2049
XENBUS: Device with no driver: device/vif/0
Freeing unused kernel memory: 180k freed
Write protecting the kernel read-only data: 387k
Red Hat nash version 5.1.19.0.2 starting
Mounting proc filesystem
Mounting sysfs filesystem
Creating /dev
Creating initial device nodes
Setting up hotplug.
Creating block device nodes.
Loading uhci-hcd.ko module
USB Universal Host Controller Interface driver v3.0
Loading ohci-hcd.ko module
Loading ehci-hcd.ko module
Loading jbd.ko module
Loading ext3.ko module
Loading dm-mod.ko module
device-mapper: ioctl: 4.10.0-ioctl (2006-09-14) initialised:
dm-devel(a)redhat.com
Loading dm-mirror.ko module
Loading dm-zero.ko module
Loading dm-snapshot.ko module
Making device-mapper control node
Scanning logical volumes
Reading all physical volumes. This may take a while...
No volume groups found
Activating logical volumes
Volume group "VolGroup00" not found
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
i mounted the image and peeked at the fstab, i am unsure where the heck its
getting VolGroup00 from. Can anyone lend any pointers to what i am doing
wrong? I seem to get the same error no matter what pre-built image i am
using.
Thanks in advance
Michael Weiner
17 years, 1 month
Graphical Display of VMS
by Sameer Gupta
hello Everyone
I m Sameer Gupta, a final yr computer engg student.
Actually i m doing a project in which i m using XEN to create virtual
machines.
But unfortunately i m not able to get graphical display of virtual machines
thus created.
I have heard of a VNC viewer, which does this for XEN.
Can anyone just brief me up with how to see graphical display of created VMs
using VNC
Will be really thankful to you for ur act of kindness.
17 years, 1 month
Can't create PV domain guest using regular file
by Tatsuro Enokura
Hi,
When I try creating a paravirt domain and install Fedora7 test2
over ftp / http with virt-install, the guest domain's kernel
said EIP message as follows:
Mar 8 14:57:56 coolmint kernel: kernel BUG at
drivers/xen/blktap/blktapmain.c:1203!
Mar 8 14:57:56 coolmint kernel: invalid opcode: 0000 [#1]
Mar 8 14:57:56 coolmint kernel: SMP
Mar 8 14:57:56 coolmint kernel: last sysfs file:
/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/irq
Mar 8 14:57:56 coolmint kernel: Modules linked in: xt_physdev
iptable_filter ip_tables x_tables i915 drm bridge netloop
netbk blktap blkbk autofs4 hidp rfcomm l2cap bluetooth sunrpc dm_mirror
dm_mod video sbs i2c_ec button battery asus_acpi
ac ipv6 lp snd_hda_intel snd_hda_codec snd_seq_dummy snd_seq_oss
snd_seq_midi_event snd_seq snd_seq_device parport_pc
snd_pcm_oss snd_mixer_oss ide_cd parport i2c_i801 irda cdrom snd_pcm
serio_raw sky2 sg crc_ccitt i2c_core snd_timer
pcspkr snd soundcore iTCO_wdt snd_page_alloc serial_core joydev ata_piix
libata sd_mod scsi_mod ext3 jbd ehci_hcd
ohci_hcd uhci_hcd
Mar 8 14:57:56 coolmint kernel: CPU: 1
Mar 8 14:57:56 coolmint kernel: EIP: 0061:[<ee510fab>] Not
tainted VLI
Mar 8 14:57:56 coolmint kernel: EFLAGS: 00010246
(2.6.19-1.2898.2.3.fc7xen #1)
Mar 8 14:57:56 coolmint kernel: EIP is at
dispatch_rw_block_io+0x96/0x853 [blktap]
Mar 8 14:57:56 coolmint kernel: eax: e34d1e40 ebx: ebde79a4 ecx:
e8f00801 edx: 00000000
Mar 8 14:57:56 coolmint kernel: esi: ee554b38 edi: ec3ddfbc ebp:
ebde79b4 esp: ec3ddb9c
Mar 8 14:57:56 coolmint kernel: ds: 007b es: 007b ss: 0069
Mar 8 14:57:56 coolmint kernel: Process xvd 1 (pid: 3234, ti=ec3dd000
task=e855a590 task.ti=ec3dd000)
Mar 8 14:57:56 coolmint kernel: Stack: 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
Mar 8 14:57:56 coolmint kernel: ec3ddc9c 00000000 00000000
e8f00800 ec3ddf50 ebde79a4 00000001 00000000
Mar 8 14:57:56 coolmint kernel: 00000000 00000000 01000000
000000b0 004f2755 00000000 00000002 00000002
Mar 8 14:57:56 coolmint kernel: Call Trace:
Mar 8 14:57:56 coolmint kernel: [<ee5120aa>]
tap_blkif_schedule+0x29f/0x3df [blktap]
Mar 8 14:57:56 coolmint kernel: [<c0431928>] kthread+0xc0/0xec
Mar 8 14:57:56 coolmint kernel: [<c040580f>] kernel_thread_helper+0x7/0x10
Mar 8 14:57:56 coolmint kernel: =======================
Mar 8 14:57:56 coolmint kernel: Code: 50 c7 44 24 70 00 00 00 00 81 38
00 00 ad de 74 10 ff 44 24 70 83 c0 04 83 7c 24
70 20 74 0c eb e8 81 7c 24 70 00 00 ad de 75 0d <0f> 0b b3 04 19 25 51
ee e9 80 07 00 00 8b 44 24 30 8a 40 01 0f
Mar 8 14:57:56 coolmint kernel: EIP: [<ee510fab>]
dispatch_rw_block_io+0x96/0x853 [blktap] SS:ESP 0069:ec3ddb9c
To do that I did the following steps
1) Exceute the virt-install command as follows:
virt-install --name=F7test2_PV --file=/root/F7test2_PV.img \
--file-size=5 --ram=512 --paravirt \
--location=http://10.131.236.20/f7test2_x86 --nographics
The virtual disk is a regular file. This happens while anaconda
is formatting the filesystem or installing packages.
The same problem as this one exists in Bugzilla #229850.
It was commented that this problem was solved by the following patches
applied.
[Xen-devel] [Patch] blktap modular build fix
http://lists.xensource.com/archives/html/xen-changelog/2006-11/msg00464.html
When the kernel-xen package which applies the patch is provided?
Thanks,
Tatsuro Enokura
17 years, 1 month
xen guest creation
by Richard Henry
I'm having a problem creating a 2nd HVM SUSE guest on a Fedora 7 test 2
dom0.The 1st created just fine. (I've also created a Ubuntu guest just
fine I originally tried a fedora guest but no luck there)
I'm using virt-manager to control the process. As I try to create the
2nd guest the virt-manager window goes blank as well as the create
progress box. If I exit out of there and restart virt-manager the domain
shows running at about 50% CPU utilization. If I then go to the console
it shows booting from disk but no further progress. I've also tried
virt-install but no success. I'm sure it's something stupid I'm doing
but I haven't found anything similar on any list that I've looked at.
I'm running AMD 64x2 with SVM.
Thanks for any help.
17 years, 1 month
RE: [Fedora-xen] some initial trouble
by Steve Brueckner
Daniel P. Berrange wrote:
> On Mon, Mar 19, 2007 at 11:16:48AM -0400, Michael Weiner wrote:
>> Xen readers -
>>
>> Been trying to get xen working on FC6 for some time now, and i am not
>> sure what i am doing wrong - last time i played with xen it was v2
>> and didnt seem to be this difficult to get working.
>
> You've not provided any initrd.
Yes, initrd's can be a pain with Fedora.
>> pretty generic, and when i go to fire it up with 'xen create
>> debian-3.1.cfg-c' it starts up and runs for a few moments then dies,
>> leaving the following in the log file:
>
> The system logs generally don't contain any useful information
> relating to Xen. You should instead look at the Xen logs -
> /var/log/xen/*
You can also get more information to debug problems by launching with
a console (#xm create -c <domname>). This will show you the VM booting,
and you'll be able to see errors such as module failures due to a lack
of an initrd.
Steve Brueckner, ATC-NY
17 years, 1 month
some initial trouble
by Michael Weiner
Xen readers -
Been trying to get xen working on FC6 for some time now, and i am not sure
what i am doing wrong - last time i played with xen it was v2 and didnt seem
to be this difficult to get working. ANyway, thought i would see if there
was a kind soul that could give me some guidance. I have a Fedora Core 6
server running the latest kernel 2.6.19-1.2911.6.5 and xen 3.0.3-6 and i
have a few dom's i grabbed from jailtime.org to play with (i.e. debian-3.1,
centos-4.4, etc). I am specifically trying to get the debian dom running,
here is the config:
kernel = "/boot/vmlinuz-2.6.19-1.2911.fc6xen"
memory = 128
name = "debian.3-1"
vif = ['']
dhcp = "dhcp"
disk = ['file:/xen/debian/debian.3-1.img,hda1,w',
'file:/xen/debian/debian.swap,hda2,w']
root = "/dev/hda1 ro"
pretty generic, and when i go to fire it up with 'xen create
debian-3.1.cfg-c' it starts up and runs for a few moments then dies,
leaving the following
in the log file:
Mar 19 11:06:19 monica kernel: xenbr0: port 3(vif11.0) entering disabled
state
Mar 19 11:06:19 monica kernel: device vif11.0 left promiscuous mode
Mar 19 11:06:19 monica kernel: audit(1174316779.413:26): dev=vif11.0 prom=0
old_prom=256 auid=4294967295
Mar 19 11:06:19 monica kernel: xenbr0: port 3(vif11.0) entering disabled
state
Mar 19 11:06:21 monica kernel: device vif12.0 entered promiscuous mode
Mar 19 11:06:21 monica kernel: audit(1174316781.232:27):
dev=vif12.0prom=256 old_prom=0 auid=4294967295
Mar 19 11:06:21 monica kernel: ADDRCONF(NETDEV_UP): vif12.0: link is not
ready
Mar 19 11:06:25 monica kernel: xenbr0: port 3(vif12.0) entering disabled
state
Mar 19 11:06:25 monica kernel: device vif12.0 left promiscuous mode
Mar 19 11:06:25 monica kernel: audit(1174316785.144:28): dev=vif12.0 prom=0
old_prom=256 auid=4294967295
Mar 19 11:06:25 monica kernel: xenbr0: port 3(vif12.0) entering disabled
state
Not really sure what the heck its complaining about. The server i am running
this on has a single network card with a single IP address so i really dont
have spare IPs i can throw at this thing. First thing, what am i doing
wrong? And does anyone have any suggestions on the best way to run this? Or
a good link that i can reference? Just seems v2 was easier to get this to
work without much magic, but i am getting old, and may not be remembering
all the details too well - its been awhile since i have played with it.
Thanks in advance
Michael Weiner
17 years, 1 month
Re: [redhat-l] fedora core 6 xen not able to bring up X server:monitor blinks infinitely
by suyash jape
Thanks for your suggestions guys...
The problem was solved by :yum update xorg*
I think the *xorg*-x11-*server*-*Xorg i386 rpm *update solved the problem.
Looks like Fedora created the problem and solved it itself(through yum i
mean) :)
teaching me a lot of things in between :)
Thanks.
On 3/19/07, satish kumar singh via redhat-l <redhat-l(a)groups.ittoolbox.com>
wrote:
>
> //*-------------------------------------------------------------
> What is Virtualization & how can it benefit your deployment?
> Read more: http://www.ittoolbox.com/da/488579
> -------------------------------------------------------------*//
>
> Hi,
>
> Just make an entry of the font with complete path in xorg.conf file,due
> to buges. Let me know further.
>
> However,sometime it doesnt work with the default font entry in
> xorg.conf file so hash it and try with the new font entry.It will come.Ididnt remember the exact path.
> ---------------Original Message---------------
> >My machine configuration is P4 1GB RAM, 40 GB HDD and COMPAQ SVGA
> monitor.
> >
> >I have installed fedor core 6 xen in my machine
> >
> >X server is not coming up with 2.6.18-1.2798.fc6xen kernel.
> >xorg.conf is using i810 driver with depth = 24
> >Fedora Core 6 is installed successfully in graphical mode
> >
> >When booting,system switches automatically to run level 3.
> >
> >When i try startx or X or system-config-display , the monitor goes blank
> and
> >monitor LED continues to blink infinitely
> >
> >Few people have faced asimilar problem but i'm not able to find a
> solution
> >for it on the Net.
> >
> >Any suggestion would be really appreciated...
> >Thanks....
> >
>
>
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17 years, 1 month
Benchmarking
by Kiranjeet Kaur Beniwal
Which tools I can use to bechmarking the performance of paravirtualized and full-virtualized xen guest
domains.
Kiran Beniwal
17 years, 1 month
