May 2012 - Users - libvirt List Archives

[libvirt-users] Renaming a LVM LV (where is vol-edit??)
by Dax Kelson 23 May '12

23 May '12

Hello, I'm using a LVM storage pool. I renamed a guest and I would like to change the LV name to match to avoid future confusion. How do i do this? There is no vol-edit command (fully updated RHEL6). Thanks, Dax Kelson

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[libvirt-users] Failed to mount devpts
by Marco Yuen 22 May '12

22 May '12

Hi all, I've been trying to start a LXC container using libvirt, but I keep getting `Failed to mount devpts on /vservers/quantum/fs/dev/pts: Invalid argument'. I found a similar thread on the mailing list a couple months ago (https://www.redhat.com/archives/libvirt-users/2012-January/msg00052.html) but the solution posted didn't work for me. Anyone has any ideas? Extra Info: Libvirt version Compiled against library: libvir 0.9.12 Using library: libvir 0.9.12 Using API: LXC 0.9.12 Running hypervisor: LXC 3.3.5 Host is running F16, and the domain xml can found at http://pastebin.com/yWXQviVy Best regards, Marco

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Re: [libvirt-users] Python Libvirt Bindings
by Hubert Zhang 22 May '12

22 May '12

https://www.redhat.com/archives/libvirt-users/2012-May/msg00005.html When I run the sample code with the case of Python code for using qemu+tcp with SASL, I always got this SASL error: Traceback (most recent call last): File "esxList.py", line 102, in ? conn = libvirt.openAuth(uri, auth, 0) File "/usr/lib/python2.4/site-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth() failed') libvirt.libvirtError: authentication failed: Failed to start SASL negotiation: -4 (SASL(-4): no mechanism available: I have no problem to run the C&java code with qemu+tcp with SASL. Is it possible an error of Python binding? Thanks, -Hubert

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[libvirt-users] Problem with pty
by Daniele Milani 21 May '12

21 May '12

Dear all I have the following problem: -I'm running libvirt 0.9.11 on ubuntu 12.04; -when I try to create a VM with the following configuration: ... <serial type='pty'> <source path='/dev/pts/2'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/2'> <source path='/dev/pts/2'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> ... I obtain this output: errore: Impossibile creare il dominio da domain_alpha_1.xml (error, impossible to create a domain from domain_alpha_1.xml) errore: errore interno Process exited while reading console log output: chardev: opening backend "pty" failed: Permission denied Does anyone know what's going wrong and ho to fix it? Thanks, Daniele Milani

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[libvirt-users] F14->F16 Upgrade Results in Win2003 Server Client BSOD 0x7f
by Thomas J. Baker 21 May '12

21 May '12

Hello, I upgraded my kvm server from Fedora 14 to Fedora 16 and the only casualty was a Windows 2003 Server client that will no longer boot with and produces a BSOD. I admittedly know very little about Windows and this VM has been around - real hardware -> Parallels on a Mac -> linux kvm but it was working fine under Fedora 14. The client does boot fine under safe mode but anything higher than that (even safe mode with networking) results in the BSOD. I've tried explicitly setting the network driver to rtl8139 in virt-manager which appears to be what it was under F14 but it didn't help. Neither did just removing the NIC under Device Manager and letting it get recognized again. As you can guess given the description, this crusty old Win2003 server instance has some worth in that recreating it is very undesirable for all involved. I'd appreciate any tips on getting it working again. Thanks, tjb -- ======================================================================= | Thomas Baker email: tjb(a)unh.edu | | Systems Programmer | | Research Computing Center voice: (603) 862-4490 | | University of New Hampshire fax: (603) 862-1761 | | 332 Morse Hall | | Durham, NH 03824 USA http://wintermute.sr.unh.edu/~tjb | =======================================================================

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[libvirt-users] Migration with rbd storage backend
by Andrey Korolyov 19 May '12

19 May '12

Hi, Seems that such migration is currently broken, at least for 0.9.11|0.9.12, with 0.9.8 all works fine: virsh migrate --live testvm qemu+tcp://towerbig/system ---snip--- 2012-05-17 21:22:30.250+0000: 16926: debug : qemuDriverCloseCallbackGet:605 : vm=testvm, uuid=feb7ccb6-1087-8661-9284-62e3a1e9f44a, conn=(nil) 2012-05-17 21:22:30.250+0000: 16926: debug : qemuDriverCloseCallbackGet:611 : cb=(nil) 2012-05-17 21:22:30.250+0000: 16926: error : virStorageFileIsSharedFSType:1007 : Invalid relative path 'rbd/testvm-Vwu': Invalid argument 2012-05-17 21:22:30.250+0000: 16926: debug : qemuDomainObjEndAsyncJob:955 : Stopping async job: migration out 2012-05-17 21:22:30.250+0000: 16926: debug : virDomainObjUnref:1645 : obj=0x1c00cd0 refs=3 2012-05-17 21:22:30.250+0000: 16926: debug : virDomainMigrateBegin3:6173 : xml (null) 2012-05-17 21:22:30.250+0000: 16926: debug : virDomainFree:2345 : dom=0x1d7ee30, (VM: name=testvm, uuid=feb7ccb6-1087-8661-9284-62e3a1e9f44a) 2012-05-17 21:22:30.250+0000: 16926: debug : virUnrefDomain:276 : unref domain 0x1d7ee30 testvm 1 ---snip--- Also there is a second point - libvirt doesn`t allow migration of VM until all snapshots has been deleted, which is not necessary for network filesystems, so it probably needs to be fixed. Thanks!

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Re: [libvirt-users] How to use Python Binding with Lbivirt.
by Hubert Zhang 19 May '12

19 May '12

When I run the python test code I got the SASL error. But it's ok if I run the C sample code. Do you know the reason? Here is the message: libvir: RPC error : authentication failed: Failed to start SASL negotiation: -4 (SASL(-4): no mechanism available: No worthy mechs found) Traceback (most recent call last): File "esxList.py", line 101, in ? conn = libvirt.openAuth(uri, auth, 0) File "/usr/lib/python2.4/site-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth() failed') libvirt.libvirtError: authentication failed: Failed to start SASL negotiation: -4 (SASL(-4): no mechanism available: No worthy mechs found) Thanks, -Hubert

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[libvirt-users] USB passthrough of all USB-slots to guest
by eGerlach 18 May '12

18 May '12

Hi, how can I define passthrough of all USB-slots to a guest with libvirt? With qemu it's very easy: # kvm -usb -usbdevice host:0.* -usbdevice host:1.* -usbdevice host:2.* -usbdevice host:3.* ... This configuration of the VM gets *all* 4 USB-Slots. Every time somewhat USB-device is plugged in the VM gets it. virt-install manpage offers: --host-device 001.003 USB by bus, device (via lsusb). I installed a VM with option --host-device 001.001 according to output of lsusb. The XML-file generated: <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x1d6b'/> <product id='0x0002'/> </source> </hostdev> But no USB device is passed through automatically. I always need virsh attach-device virtualM myusb.xml with exact vendor and product ID. I want to plug in somewhat USB-Stick or other USB stuff without exploring vendor and product id before. Who can help? tia Ekkard

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[libvirt-users] lxc: Add /dev/tty to lxcContainerPopulateDevices() ?
by Sukadev Bhattiprolu 17 May '12

17 May '12

Hi, src/lxc/lxc_container.c:lxcContainerPopulateDevices() has this table of devices that are automatically created when an lxc container is started. const struct { int maj; int min; mode_t mode; const char *path; } devs[] = { { LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_NULL, 0666, "/dev/null" }, { LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_ZERO, 0666, "/dev/zero" }, { LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_FULL, 0666, "/dev/full" }, { LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_RANDOM, 0666, "/dev/random" }, { LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_URANDOM, 0666, "/dev/urandom" }, }; Can we add '/dev/tty' to this list ? We were trying to run 'smbpasswd -a user' inside a container without /dev/tty and the fopen("/dev/tty", "w+") in smbpasswd made /dev/tty a regular file, breaking man(1), less(1), and ofcourse smbpasswd :-) Sure we can add /dev/tty to container's rc.local or something, but wouldn't it be in the same category as say, /dev/null or /dev/zero ? Sukadev

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[libvirt-users] Using virsh to connect to ESX
by Mauro Monteiro 17 May '12

17 May '12

Hello All, I have just started studying the libvirt and I am trying to connect to ESX Server (version 4) using virsh (version 0.7.5) using the following command: virsh -c esx+ssh://root@<fully qualified hostname)> It inquires the root password and as soon as I inform the password it throws the error: error: cannot recv data: Connection reset by peer error: failed to connect to the hypervisor I can access my server using ssh. I am running it from Ubuntu 10.04 and the libvirt version 0.7.5. Can someone help me? -- []'s Mauro

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