Comments on: KVM network scripts http://blog.bodhizazen.net/linux/kvm_network_scripts/ A LAMP in the Samsara Thu, 11 Mar 2010 21:41:45 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: pgreenwood http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-1470 pgreenwood Thu, 04 Feb 2010 00:19:44 +0000 http://blog.bodhizazen.net/?p=466#comment-1470 This seems to be the best resource around for what I'm looking for -- to easily and repeatedly launch a VM in Debian squeeze/sid 2.6.30-2-amd64 with networking and sound. virt-manager consistently provides networking without sound; the command line consistently provides sound without networking. Running this command ~# kvm -m 2048 -no-frame -net tap,script=/etc/kvm/kvm-ifup -soundhw all -hda /home/pat/vista.qcow -- the error I get is: device eth2 is already a member of a bridge; can't enslave it to bridge br0. /etc/kvm/kvm-ifdown: could not launch network script. I'll be testing-out these scripts and report back. This seems to be the best resource around for what I’m looking for — to easily and repeatedly launch a VM in Debian squeeze/sid 2.6.30-2-amd64 with networking and sound. virt-manager consistently provides networking without sound; the command line consistently provides sound without networking. Running this command ~# kvm -m 2048 -no-frame -net tap,script=/etc/kvm/kvm-ifup -soundhw all -hda /home/pat/vista.qcow — the error I get is:
device eth2 is already a member of a bridge; can’t enslave it to bridge br0.
/etc/kvm/kvm-ifdown: could not launch network script.

I’ll be testing-out these scripts and report back.

]]> By: ----kvm---- http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-980 ----kvm---- Sat, 22 Aug 2009 16:19:28 +0000 http://blog.bodhizazen.net/?p=466#comment-980 Great!!! Great!!!

]]> By: bodhi.zazen http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-950 bodhi.zazen Mon, 13 Jul 2009 06:17:42 +0000 http://blog.bodhizazen.net/?p=466#comment-950 @Master One - Well, I mis-spoke, not VDE, but VDE functionality. You are correct in that the term "KVM" is confusing as there are several front ends for KVM from libvirt to virsh to virt-manager to web based interfaces. Personally I prefer to run KVM directly, from the command line, with a few scripts. virt-manager is highly variable, IMO, in terms of functionality across distros and versions (virt-manager is not the same on Ubuntu vs Fedora for example). @Master One – Well, I mis-spoke, not VDE, but VDE functionality.

You are correct in that the term “KVM” is confusing as there are several front ends for KVM from libvirt to virsh to virt-manager to web based interfaces.

Personally I prefer to run KVM directly, from the command line, with a few scripts.

virt-manager is highly variable, IMO, in terms of functionality across distros and versions (virt-manager is not the same on Ubuntu vs Fedora for example).

]]> By: Master One http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-930 Master One Wed, 08 Jul 2009 21:47:15 +0000 http://blog.bodhizazen.net/?p=466#comment-930 bodhi.zazen, the info, that "VDE is built into virt-manager" can't be right, because virt-manager depends on libvirt, and VDE is still not supported by libvirt. VDE (to be precisely VDE2) is the superior way to get it all connected, and it is indeed already supported by QEMU/KVM, but unfortunately not by any of the management tools, that rely on libvirt. There is very little up-to-date info available, and I am just trying to clue all pieces together, seems I have to go for kvm without libvirt, because I really don't want to miss VDE (and during my tests I didn't like it, when libvirt messed around with my iptables setup). If anybody has some more info on that topic, or links to up-to-date tutorials, please tell. bodhi.zazen, the info, that “VDE is built into virt-manager” can’t be right, because virt-manager depends on libvirt, and VDE is still not supported by libvirt.

VDE (to be precisely VDE2) is the superior way to get it all connected, and it is indeed already supported by QEMU/KVM, but unfortunately not by any of the management tools, that rely on libvirt.

There is very little up-to-date info available, and I am just trying to clue all pieces together, seems I have to go for kvm without libvirt, because I really don’t want to miss VDE (and during my tests I didn’t like it, when libvirt messed around with my iptables setup).

If anybody has some more info on that topic, or links to up-to-date tutorials, please tell.

]]> By: Michael http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-922 Michael Fri, 03 Jul 2009 13:36:15 +0000 http://blog.bodhizazen.net/?p=466#comment-922 Thanks for sharing this info. Unfortunately the error message keeps coming. The rest seems to work very well. That's the most important for me. Thanks for this blog. Redirecting the error message to /dev/null and all problems seems to be solved :-) Thanks for sharing this info.
Unfortunately the error message keeps coming. The rest seems to work very well. That’s the most important for me. Thanks for this blog.
Redirecting the error message to /dev/null and all problems seems to be solved :-)

]]> By: bodhi.zazen http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-915 bodhi.zazen Thu, 02 Jul 2009 21:50:16 +0000 http://blog.bodhizazen.net/?p=466#comment-915 1. Try removing the "-g kvm" from the /etc/qemu-ifup script, line "/usr/bin/sudo /usr/sbin/tunctl -u user -g kvm -t $1" /usr/bin/sudo /usr/sbin/tunctl -u user -t $1 2. Make sure on the same line, "-u user" is your user name (and not "user"). 1. Try removing the “-g kvm”

from the /etc/qemu-ifup script, line

“/usr/bin/sudo /usr/sbin/tunctl -u user -g kvm -t $1″

/usr/bin/sudo /usr/sbin/tunctl -u user -t $1

2. Make sure on the same line, “-u user” is your user name (and not “user”).

]]> By: Michael http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-913 Michael Thu, 02 Jul 2009 21:16:26 +0000 http://blog.bodhizazen.net/?p=466#comment-913 all seems to work now (also as normal user) except for the TUNSETIFF: Device or resource busy message. Michael all seems to work now (also as normal user) except for the TUNSETIFF: Device or resource busy message.

Michael

]]> By: Michael http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-912 Michael Thu, 02 Jul 2009 19:37:57 +0000 http://blog.bodhizazen.net/?p=466#comment-912 Extra Inf: As root I got the same error, but the VM seems to run without problems, network is bridged. What me surprise is that the bridge module NOT is loaded when you execute the lsmod|grep bridge command. Output gives: bridge 41488 0 stp 1944 1 bridge llc 4780 2 bridge,stp Only the stp and llc seems to be loaded. This is also this when using bridge networking with virt-manager Also with virt-manager I have a perfect working bridge network (without the bridge module loaded). Extra Inf:
As root I got the same error, but the VM seems to run without problems, network is bridged.
What me surprise is that the bridge module NOT is loaded when you execute the
lsmod|grep bridge command.
Output gives:
bridge 41488 0
stp 1944 1 bridge
llc 4780 2 bridge,stp
Only the stp and llc seems to be loaded.

This is also this when using bridge networking with virt-manager
Also with virt-manager I have a perfect working bridge network (without the bridge module loaded).

]]> By: Michael http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-911 Michael Thu, 02 Jul 2009 17:30:46 +0000 http://blog.bodhizazen.net/?p=466#comment-911 Unfortunately under Fedora 11 I keep getting the error: TUNSETIFF: Device or resource busy $kvm-bridge -m 512 -drive file=/var/lib/libvirt/images/Ubuntu.img Bringing up interface tap5 with mac address DE:AD:BE:EF:10:14 + '[' -n tap5 ']' + /usr/bin/sudo /usr/sbin/tunctl -u michael -g kvm -t tap5 TUNSETIFF: Device or resource busy + /usr/bin/sudo /sbin/ip link set tap5 up + sleep 0.5s + /usr/bin/sudo /usr/sbin/brctl addif br0 tap5 + exit 0 qemu: could not open disk image /var/lib/libvirt/images/Ubuntu.img Any ideas? ( my username is michael groups output give: michael ecryptfs vboxusers kvm stat /dev/kvm File: ‘/dev/kvm’ Size: 0 Blocks: 0 IO Block: 4096 byte-apparaat Device: fh/15d Inode: 7974 Links: 1 Device type: a,e8 Access: (0660/crw-rw----) Uid: ( 0/ root) Gid: ( 503/ kvm) Access: 2009-07-02 19:15:44.443862986 +0200 Modify: 2009-07-02 19:15:44.443862986 +0200 Change: 2009-07-02 19:26:22.007465932 +0200 ) Unfortunately under Fedora 11 I keep getting the error:
TUNSETIFF: Device or resource busy

$kvm-bridge -m 512 -drive file=/var/lib/libvirt/images/Ubuntu.img
Bringing up interface tap5 with mac address DE:AD:BE:EF:10:14
+ ‘[' -n tap5 ']‘
+ /usr/bin/sudo /usr/sbin/tunctl -u michael -g kvm -t tap5
TUNSETIFF: Device or resource busy
+ /usr/bin/sudo /sbin/ip link set tap5 up
+ sleep 0.5s
+ /usr/bin/sudo /usr/sbin/brctl addif br0 tap5
+ exit 0
qemu: could not open disk image /var/lib/libvirt/images/Ubuntu.img

Any ideas?
(
my username is michael

groups output give:
michael ecryptfs vboxusers kvm

stat /dev/kvm
File: ‘/dev/kvm’
Size: 0 Blocks: 0 IO Block: 4096 byte-apparaat
Device: fh/15d Inode: 7974 Links: 1 Device type: a,e8
Access: (0660/crw-rw—-) Uid: ( 0/ root) Gid: ( 503/ kvm)
Access: 2009-07-02 19:15:44.443862986 +0200
Modify: 2009-07-02 19:15:44.443862986 +0200
Change: 2009-07-02 19:26:22.007465932 +0200

)

]]> By: Shadows of epiphany » Blog Archive » KVM network scripts | networking-the.info http://blog.bodhizazen.net/linux/kvm_network_scripts/comment-page-1/#comment-887 Shadows of epiphany » Blog Archive » KVM network scripts | networking-the.info Tue, 23 Jun 2009 22:17:27 +0000 http://blog.bodhizazen.net/?p=466#comment-887 [...] Originally posted here: Shadows of epiphany » Blog Archive » KVM network scripts [...] [...] Originally posted here: Shadows of epiphany » Blog Archive » KVM network scripts [...]

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