xen June 2007

xen@lists.stg.fedoraproject.org

58 participants
67 discussions

Problem Installing Fedora 7 as a Guest on Xen machine
by Samad, Alex 11 Jun '07

11 Jun '07

Hi I have run into a problem installing fedora 7 as a guest on a Xen machine. The host machine is a amd64 - Debian lenny install. Running 2.6.20-1-xen-amd64 xm info host : debxen release : 2.6.20-1-xen-amd64 version : #1 SMP Tue Apr 24 22:23:22 UTC 2007 machine : x86_64 nr_cpus : 4 nr_nodes : 1 sockets_per_node : 2 cores_per_socket : 2 threads_per_core : 1 cpu_mhz : 2800 hw_caps : 178bfbff:ebd3fbff:00000000:00000010:00002001:00000000:0000001f total_memory : 8191 free_memory : 1 xen_major : 3 xen_minor : 0 xen_extra : .3-1 xen_caps : xen-3.0-x86_64 hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 xen_pagesize : 4096 platform_params : virt_start=0xffff800000000000 xen_changeset : Tue Oct 17 22:09:52 2006 +0100 cc_compiler : gcc version 4.1.2 20061028 (prerelease) (Debian 4.1.1-19) cc_compile_by : ultrotter cc_compile_domain : debian.org cc_compile_date : Fri Nov 3 00:21:27 CET 2006 xend_config_format : 2 I have downloaded the fedora 7 DVD, I have extracted the xen vmlinuz and zen initrd.img This is my fedora7.cfg # # Kernel + memory size # kernel = '/etc/xen/data/fedora7/vmlinuz' ramdisk = '/etc/xen/data/fedora7/initrd.img' memory = '1024' extra = 'pnpacpi=off sync_console vnc vncpassword=qwerty text vncconnect=16.144.29.11' #bootloader = '/usr/lib/xen-3.0.3-1/bin/pygrub' # # Disk device(s). # disk = [ 'phy:vglocal/fedora7-disk,xvda,w' ] # # Hostname # name = 'fedora7' # # Networking # dhcp = 'dhcp' #vif = [ 'type=ioemu, bridge=xenbr0' ] vif = [ '' ] # # Behaviour # on_poweroff = 'destroy' on_reboot = 'restart' on_crash = 'restart' serial = "pty" localtime = 0 vcpus = 2 I tried something similar with RHEL5 and it worked, fedora7 is getting stuck >From xm console fedora7 io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) pci_hotplug: PCI Hot Plug PCI Core version: 0.5 rtc: IRQ 8 is not free. Non-volatile memory driver v1.2 Linux agpgart interface v0.101 (c) Dave Jones RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize input: Macintosh mouse button emulation as /class/input/input0 Xen virtual console successfully installed as xvc0 Event-channel device installed. 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 XENBUS: Device with no driver: device/vbd/51712 XENBUS: Device with no driver: device/vif/0 Write protecting the kernel read-only data: 938k I not sure what is mean to come after here for me to guess where it might be getting stuck. Can any one provide any hints or know what is going wrong. Maybe there is a mis match of the xen versions ??? Thanks Alex

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read-only acces to a filesystem on a xen guest
by Jordi Prats 10 Jun '07

10 Jun '07

Hi, Which is the best way to acces a the data on a live xen guest to do backups? It's safe enought to mount it as read-only? I supose it is not, isn't it? If it's on a logical volume of LVM I could do a snapshot. Would it be consistent with the filesystem without being mounted on the dom0? So LVM is smart enought to tell to the xen guest to flush all cache buffers before to do the snapshot? Thanks, Jordi -- ...................................................................... __ / / Jordi Prats Català C E / S / C A Departament de Sistemes /_/ Centre de Supercomputació de Catalunya Gran Capità, 2-4 (Edifici Nexus) · 08034 Barcelona T. 93 205 6464 · F. 93 205 6979 · jprats(a)cesca.es ...................................................................... pgp:0x5D0D1321 ......................................................................

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building boot/xen/vmlinuz and intrd docs
by Johan De Wit 07 Jun '07

07 Jun '07

Hi, Running FC7, on a non PAE laptop. Rebuilded the xen kernels, but when installing guests using virt-install, this doesn't work. So I'm looking for some docs/howto to rebuild the /boot/xen from the installation CD without the PAE feature. I dit copy the kernel-xen vmlinuz to the boot. But then i have to load some drivers manually. Thanks a lot Johan

1 0

Debian VM progress
by Brian Lavender 06 Jun '07

06 Jun '07

It turns out I was able to get my Debian VM to boot. My Dom0 is actually a Centos 5. What I did is I created a Debian install using QEMU, then I placed the Centos kernel into Debian. I created an initrd for the Debian using the Centos kernel. I also told the kernel that the console was xvc0. I added xvc0 to the /etc/inittab and securetty. The system boots, things start, and I get a login for the console. But.... I don't see an eth0. The only indication I see of an eth0 is the following. netfront: Initialising virtual ethernet driver. netfront: device eth0 has flipping receive path. But, I don't see any evidence when I type ifconfig. So, what do I need to do to get this eth0 going? brian -- Brian Lavender http://www.brie.com/brian/

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Centos5 Dom0 and Fedora7 DomU
by Brian McDonald 06 Jun '07

06 Jun '07

I am having problems getting a fedora7 domu running under my Centos5 Dom0 (this is a centos5 server no graphical interface) I followed the same steps to created the fedora 7 domu as I have for creating the cenots5 domu that I have on the same box. I downloaded the vmlinux and initrd from here ftp://download.fedora.redhat.com/pub/fedora/linux/releases/7/Fedora/i386/os/ images/xen/ Xm config: kernel = "/boot/vmlinuz-f7xeninstall" ramdisk = "/boot/initrd-f7xeninstall" extra = "text ks=http://www.mcdees-specialties.com/fed7/minimal-ks.cf" name = "fed7" memory = "230" disk = [ 'tap:aio:/var/lib/xen/images/fed7.img,xvda,w', ] #vif = [ '', ] vif = [ 'bridge=xenbr0', ] ip = "192.168.1.202" netmask = "255.255.255.0" gateway = "192.168.1.1" vcpus=1 on_reboot = 'destroy' on_crash = 'destroy' When I run xm create -c fed7inst it gets to here and stops ..................................... Using IPI No-Shortcut mode XENBUS: Device with no driver: device/vbd/51712 XENBUS: Device with no driver: device/vif/0 Freeing unused kernel memory: 180k freed Write protecting the kernel read-only data: 762k Any and all ideas are welcome

4 7

fedora 7 guest problems under fedora 6 host
by Tom Horsley 06 Jun '07

06 Jun '07

I've been trying to install fedora 7 i386 as a guest using a fedora 6 x86_64 host (opteron). If I do a fully virtual HVM install, I always encounter this bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=237895 really early in the install, so it doesn't get very far. If I try to do a paravirt install from the fedora 7 DVD image (mounted under apache to be accessible on the network), the virt-manager app crashes as soon as it is about to start the install. Anyone have any tips for a successful f7 i386 install under an f6 dom0?

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RE: [Fedora-xen] Centos5 Dom0 and Fedora7 DomU
by Paul Wouters 06 Jun '07

06 Jun '07

On Wed, 6 Jun 2007, Brian McDonald wrote: > I am using the new fedora 7 image, you mean fedora 7 does not like to be a > DOMU? This does make any sense. The Fedora initrd on the Dom0 cannot be used to start xenu's because the initrd is lacking xenblk and xennet. Basically, you can only use pygrub with the dom0 and unchanged initrd's, which means that you can only run FC6 and/or F7 machines. As soon as you need to brung up other OSes (eg FC3 or RHEL4 or Centos or Debian), you will need a custom made initrd. Paul

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32bit PV on 64bit Host
by Jim Klein 06 Jun '07

06 Jun '07

It's my understanding that 32bit PV vms would run on 64bit hosts with Xen 3.1. However, this doesn't seem to work. Attempting to use virt-install from 64bit using a 32bit source files (over http) dies almost instantly. Creating the 32bit PV vm on a 32-bit system and copying to 64bit also doesn't work (dies at start before even a hint of starting.) Same when migrating a 32bit to a 64 bit (again, dies instantly.) Am I wrong about 32bit on 64bit hosts?

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Fedora 7 virtual machine problems
by John Lagrue 06 Jun '07

06 Jun '07

I have at least two problems running a virtual machine on F7 1. When I run qemu from the command line I can create a virtual disk, run a virtual machine and install Windows XP on it. I can do this because it enables me to define the cdrom on the command line with "-cdrom /dev/cdrom". But I can't get any further because it keeps giving me an error saying "A problem is preventing Windows from accurately checking the license for this computer" If I run the same virtual machine from the virtual machine manager I don't get that error. But I don't get the CD ROM either 2. The above was obtained with QEMU. If I try to connect the Virtual Machine Manager to XEN I get an error that tells me that either I'm not running a XEN-enabled kernel, or the XEN service isn't running. Unfortunately, it is running! Any advice from anyone on either of these? I would love to do away with dual-booting my laptop and just run Vista in a VM when I need it, but so far I'm not having a lot of luck. JDL

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How to create a Debian VM?
by Brian Lavender 05 Jun '07

05 Jun '07

My adventure creating a Debian VM on Fedora hit a snag. Is there another way to do a Debian VM on Fedora? brian -- Brian Lavender http://www.brie.com/brian/

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xen June 2007