virt January 2012

virt@lists.fedoraproject.org

29 participants
27 discussions

Bridged Networking - Virtual Environments
by Jorge Fábregas 27 Jul '12

27 Jul '12

Hello everyone, I'm learning about bridged networking and how it is applied to virtual environments (bypassing all the automation provided by libvirtd etc) . I have a question regarding ip configuration for the virtual bridge. Let's say I have a host (my machine) where I want to run 3 VMs bridged to my home network (thru eth0). I have a DHCP server running on my DSL router, and I have dhcp enabled on my 3 VMs so they all should get a lease from the DHCP. As far as a I know these are the raw steps needed to accomplish this: 1- create br0 2- remove current ip address from eth0 3- enslave eth0 to br0 4- create tap devices 5- attach tap devices to br0 6- assign tap devices to every VM As you can see I haven't assigned an ip address to the virtual bridge (br0). Why is it that (on almost any site that I visit with this setup) they always end up assigning an ip address to br0? Thanks in advance! Jorge

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Log filling with bogus(?) VLAN-related error message
by Ian Pilcher 08 May '12

08 May '12

My syslog is getting flooded with messages like this: Nov 19 15:27:16 ian libvirtd: 15:27:16.949: 2725: error : virInterfaceDefParseXML:807 : XML description for vlan interface misses the vlan element is not well formed or invalid I do have tagged VLAN interfaces on the host (br0.1, br0.4, and br0.251), but none of my VMs are using them. I am not using any libvirt-managed networks at all: [pilcher@ian ~]$ sudo virsh net-list --all Name State Autostart ----------------------------------------- default inactive no I am running libvirt-0.8.8-7.fc15.x86_64. Any ideas? Thanks! -- ======================================================================== Ian Pilcher arequipeno(a)gmail.com "If you're going to shift my paradigm ... at least buy me dinner first." ========================================================================

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Close a VM, virt-manager loses connection
by Jerry James 29 Jan '12

29 Jan '12

I'm having a problem with multiple VMs and virt-manager on a Fedora 16 x86_64 machine. When I have multiple VMs running and shut one down, frequently virt-manager loses its connection. All of my VM windows disappear, and I'm left looking at a dialog box that says (after expanding the "Details" tab): Error polling connection 'qemu:///system': Unable to read from monitor: Connection reset by peer Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/engine.py", line 440, in _tick conn.tick() File "/usr/share/virt-manager/virtManager/connection.py", line 1507, in tick vm.tick(now) File "/usr/share/virt-manager/virtManager/domain.py", line 1531, in tick info = self._backend.info() File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1411, in info if ret is None: raise libvirtError ('virDomainGetInfo() failed', dom=self) libvirtError: Unable to read from monitor: Connection reset by peer Simply reconnecting in virt-manager usually works, and then I can reopen windows for the VMs that are still running. HOWEVER, yesterday I had this happen and one of my running VMs was NOT listed. I just about panicked, thinking it had been deleted somehow. However, restarting libvirtd made it show up again. Is this a known problem? If not, what component should I file a bug against? Thanks, -- Jerry James http://www.jamezone.org/

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Fedora 16 Removable media bugs
by Ian Pilcher 29 Jan '12

29 Jan '12

https://bugzilla.redhat.com/show_bug.cgi?id=753863 https://bugzilla.redhat.com/show_bug.cgi?id=749928 What can I do to help get these bugs fixed? -- ======================================================================== Ian Pilcher arequipeno(a)gmail.com "If you're going to shift my paradigm ... at least buy me dinner first." ========================================================================

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virsh as user? F16+ host.
by Frank Murphy 27 Jan '12

27 Jan '12

the xml files are in: /etc/libvirt/qemu/*.xml Usually I have to start as root. If I try as user: cd /etc/libvirt/qemu && virsh start 02-64-Bit-Old && virsh console 02-64-Bit-Old bash: cd: /etc/libvirt/qemu: Permission denied I would like to be able to do this as user, I was thinking chown user:user /etc/libvirt/qemu but am worried about any security issues. -- Regards, Frank Murphy, friend of fedoraproject UTF_8 Encoded

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Start guest on host as cronjob?
by Frank Murphy 26 Jan '12

26 Jan '12

Havn't found much on this a la search engines.. Normally you would do a seriel console to grap a dodgy guest bootup. ttywatch --name myhost --port /dev/ttyS0 How could this be adapted to start the guest from the host non-interactive. (cronjob on host, do whatever on guest), then poweroff guest. -- Regards, Frank Murphy, friend of fedoraproject UTF_8 Encoded

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Problem with w7 guest after kernel 3.2.1 install
by Gianluca Cecchi 26 Jan '12

26 Jan '12

Hello, perhaps it is unrelated but yestareday I ran update on my F16 system and got this Jan 25 10:19:13 Updated: glib2-2.30.2-1.fc16.x86_64 Jan 25 10:19:14 Updated: openssl-1.0.0g-1.fc16.x86_64 Jan 25 10:19:14 Updated: chkconfig-1.3.57-2.fc16.x86_64 Jan 25 10:19:14 Updated: gtk3-3.2.3-1.fc16.x86_64 Jan 25 10:19:15 Updated: libva-1.0.15-1.fc16.x86_64 Jan 25 10:19:15 Updated: ffmpeg-libs-0.8.8-1.fc16.x86_64 Jan 25 10:19:16 Updated: 1:qt-4.8.0-7.fc16.x86_64 Jan 25 10:19:16 Updated: postgresql-libs-9.1.2-2.fc16.x86_64 Jan 25 10:19:16 Updated: orc-0.4.16-5.fc16.x86_64 Jan 25 10:19:16 Updated: foomatic-db-filesystem-4.0-30.20120103.fc16.noarch Jan 25 10:19:16 Updated: 12:dhcp-libs-4.2.3-5.P2.fc16.x86_64 Jan 25 10:19:16 Updated: 12:dhcp-common-4.2.3-5.P2.fc16.x86_64 Jan 25 10:19:21 Updated: foomatic-db-ppds-4.0-30.20120103.fc16.noarch Jan 25 10:19:21 Updated: orc-compiler-0.4.16-5.fc16.x86_64 Jan 25 10:19:23 Updated: postgresql-9.1.2-2.fc16.x86_64 Jan 25 10:19:25 Updated: 1:qt-x11-4.8.0-7.fc16.x86_64 Jan 25 10:19:26 Updated: gnome-keyring-3.2.1-3.fc16.x86_64 Jan 25 10:19:26 Updated: glusterfs-3.2.5-6.fc16.x86_64 Jan 25 10:19:27 Updated: git-1.7.7.6-1.fc16.x86_64 Jan 25 10:19:27 Updated: perl-Git-1.7.7.6-1.fc16.noarch Jan 25 10:19:38 Updated: selinux-policy-3.10.0-72.fc16.noarch Jan 25 10:19:38 Updated: mplayer-common-1.0-0.128.20110816svn.fc16.x86_64 Jan 25 10:19:39 Updated: augeas-libs-0.10.0-3.fc16.x86_64 Jan 25 10:19:39 Updated: mplayer-1.0-0.128.20110816svn.fc16.x86_64 Jan 25 10:19:41 Updated: selinux-policy-targeted-3.10.0-72.fc16.noarch Jan 25 10:19:41 Updated: glusterfs-fuse-3.2.5-6.fc16.x86_64 Jan 25 10:19:42 Updated: gnome-keyring-pam-3.2.1-3.fc16.x86_64 Jan 25 10:19:45 Updated: 1:qt-devel-4.8.0-7.fc16.x86_64 Jan 25 10:19:46 Updated: postgresql-server-9.1.2-2.fc16.x86_64 Jan 25 10:19:46 Updated: orc-devel-0.4.16-5.fc16.x86_64 Jan 25 10:19:50 Updated: foomatic-db-4.0-30.20120103.fc16.noarch Jan 25 10:19:50 Updated: 12:dhclient-4.2.3-5.P2.fc16.x86_64 Jan 25 10:19:51 Updated: ffmpeg-devel-0.8.8-1.fc16.x86_64 Jan 25 10:19:51 Updated: ffmpeg-0.8.8-1.fc16.x86_64 Jan 25 10:19:51 Updated: libva-devel-1.0.15-1.fc16.x86_64 Jan 25 10:19:51 Updated: libva-utils-1.0.15-1.fc16.x86_64 Jan 25 10:19:51 Updated: gtk3-immodule-xim-3.2.3-1.fc16.x86_64 Jan 25 10:19:51 Updated: gnome-color-manager-3.2.2-1.fc16.x86_64 Jan 25 10:19:52 Updated: ntsysv-1.3.57-2.fc16.x86_64 Jan 25 10:19:52 Updated: 1:nfs-utils-1.2.5-4.fc16.x86_64 Jan 25 10:19:52 Updated: mysql-libs-5.5.19-1.fc16.x86_64 Jan 25 10:19:52 Updated: ibus-hangul-1.4.0-1.fc16.x86_64 Jan 25 10:19:53 Updated: glib2-devel-2.30.2-1.fc16.x86_64 Jan 25 10:19:54 Updated: gjs-1.30.1-1.fc16.x86_64 Jan 25 10:19:54 Updated: espeak-1.46.02-1.fc16.x86_64 Jan 25 10:19:55 Updated: libicu-4.6-4.fc16.x86_64 Jan 25 10:19:55 Updated: kernel-headers-3.2.1-3.fc16.x86_64 Jan 25 10:20:03 Installed: kernel-devel-3.2.1-3.fc16.x86_64 Jan 25 10:20:04 Updated: iso-codes-3.32-1.fc16.noarch Jan 25 10:20:04 Updated: xkeyboard-config-2.3-3.fc16.noarch Jan 25 10:20:04 Updated: alsa-plugins-pulseaudio-1.0.24-3.fc16.x86_64 Jan 25 10:20:04 Updated: os-prober-1.48-2.fc16.x86_64 Jan 25 10:20:05 Updated: kernel-tools-3.2.1-3.fc16.x86_64 Jan 25 10:20:05 Updated: 1:emacs-filesystem-23.3-9.fc16.x86_64 Jan 25 10:20:05 Updated: procmail-3.22-29.fc16.x86_64 Jan 25 10:20:05 Updated: gnome-tweak-tool-3.2.2-1.fc16.noarch Jan 25 10:20:05 Updated: pptp-1.7.2-14.fc16.x86_64 Jan 25 10:20:06 Updated: rubygem-treetop-1.4.10-1.fc16.noarch Jan 25 10:20:15 Updated: kernel-doc-3.2.1-3.fc16.noarch Jan 25 10:20:19 Installed: kernel-3.2.1-3.fc16.x86_64 Jan 25 10:20:19 Updated: 1:libguestfs-1.14.9-1.fc16.x86_64 Jan 25 10:20:19 Updated: 1:libguestfs-tools-c-1.14.9-1.fc16.x86_64 I continued runnign previous kernel (3.1.9...) and a w7 spiced guest. This morning after reboot it seems w7 guest doesn't start anymore. It remains in the black screen with w7 logo that flash a little and remains there with 100% cpu consumption... ALso trying to rstart with old kernel after this the w7 guest blocks its startup... Any suggestion or other guys encountering such a problem? Gianluca

1 0

Speaking of the mouse
by Tom Horsley 25 Jan '12

25 Jan '12

What is the "best" way to setup a Windows XP KVM mouse (especially what matching gibberish should go in the xml definition of the XP virtual machine :-)? I'm currently using an old version of the XP agent and serial driver, and when I experimented with updating, my XP mouse stopped working, so I'm wondering what the correct combination is supposed to be for latest and greatest most wonderful mouse support. Any example of a specific setup on the web somewhere?

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mouse stopped working in F16 guests (on F16 host, using VNC/cirrus)
by Chuck Anderson 25 Jan '12

25 Jan '12

I had a couple original F16 guests (un-updated) that I had originally installed under a F13 host months ago. I installed a new copy (not upgraded) of F16 on the host and imported the guests with their original storage. This all worked fine until I did "yum update" on the F16 guests (these guests are used for off-net testing, so they were never updated until today--500+ entries in the update transaction). Now the mouse pointers don't show up in the guests in virt-manager, and "xev" on the guests shows no mouse activity at all. I'm using cirrus for the video hardware and VNC for the remote display protocol. I've tried rebooting host & guests with no improvement. How can I troubleshoot/fix this? Thanks.

4 7

Re: [fedora-virt] Slow virtual ping
by Anthony Vanover 24 Jan '12

24 Jan '12

I can't say for sure, but I think you may have too many virtual CPU's set. Sometimes, it takes longer with more CPUs because the more there are, the longer the latency of scheduled tasks. Set it to 1, if not already, and see if that makes a difference. Poke around in your NIC settings too, something may be off there... On Sat, 2012-01-21 at 12:00 +0000, virt-request(a)lists.fedoraproject.org wrote: > Date: Fri, 20 Jan 2012 17:22:46 +0100 > From: Andrés García <andres(a)verot.com> > Cc: virt(a)lists.fedoraproject.org > Subject: Re: [fedora-virt] virt Digest, Vol 37, Issue 15 > Message-ID: <4F1994D6.6040502(a)verot.com> > Content-Type: text/plain; charset=UTF-8; format=flowed > > > > So, just to verify, you're saying that you ping the virtual machine when > > just after boot, stop the ping, wait a few hours, and ping again? But > > this time the ping is slower? > > That's right > > > > And you're using F16 as the virtual? > > Both as host and guest. > > > Andres > -- Sending sensitive information? Use PGP? Then grab my public key available @ anthonyvanover.tk/public.asc

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virt January 2012