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[libvirt-users] libvirt bridges rhel7
by Derek Yarnell 07 Jan '15

07 Jan '15

Hi, In RHEL5/6 we have been able to create bridges on our hyper-visor of a number of vlans (eg. em1 -> em1.483 -> br483) We would be able to see this br483 in the virt-manager drop down network choice at the end of creating a new host. On RHEL7 we are not using NetworkManager per the documentation[0] for bridges (and because it is not worth it). So a RHEL7 virt-manager (0.10.0) when connected to a libvirtd for RHEL6 (0.10.2) shows the bridge but when connected to a libvirtd for RHEL7 (1.1.1) it does not. So it isn't a virt-manager problem as it seems to be a difference in the backend libvirtd. You are able to manually specify the bridge device and it does work though. The `iface-dumpxml br483` command in virsh on RHEL6 and RHEL7 both are identical. I guess the question how does a libvirt client like virt-manager determine a iface is a usable bridge? [0] - https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/ht… Thanks, derek -- Derek T. Yarnell University of Maryland Institute for Advanced Computer Studies

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[libvirt-users] ubuntu virsh snapshot-create-as gives Error -22 while writing VM
by Jon Schipp 07 Jan '15

07 Jan '15

Hello all, I'm trying to create an online internal snapshot to work with Cuckoo Sandbox. I keep receiving this -22 error below on my Ubuntu system and I'm out of ideas, been at it for a while so any help is appreciated. root@cuckoo-sec:~# virsh snapshot-create-as cuckoo cuckoo-snap1 "Cuckoo Snapshot" error: operation failed: Error -22 while writing VM $ uname -a Linux cuckoo-sec 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=14.04 DISTRIB_CODENAME=trusty DISTRIB_DESCRIPTION="Ubuntu 14.04 LTS" $ kvm --version QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.9), Copyright (c) 2003-2008 Fabrice Bellard $ libvirtd --version libvirtd (libvirt) 1.2.2 $ qemu-img info /opt/kvm/Windows7-64.qcow2 image: /opt/kvm/Windows7-64.qcow2 file format: qcow2 virtual size: 25G (26843545600 bytes) disk size: 12G cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false $ virsh list Id Name State ---------------------------------------------------- 17 cuckoo running $ apt-get install apparmor-utils $ aa-status $ aa-complain /usr/sbin/libvirtd $ aa-complain /etc/apparmor.d/libvirt/libvirt-bdfcd0d8-b032-6870- 79bf-c77e0a3c8590 $ strace virsh snapshot-create-as cuckoo cuckoo-snap1 "Cuckoo Snapshot" ... gettid() = 10168 futex(0x7f4726ab8240, FUTEX_WAKE_PRIVATE, 1) = 0 futex(0x7f4726ab8240, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable) futex(0x7f4726ab8240, FUTEX_WAKE_PRIVATE, 1) = 0 gettid() = 10168 Thanks -- Jon Schipp, jonschipp.com, sickbits.net, opennsm.ncsa.illinois.edu

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[libvirt-users] use of qemu-kvm --chardev pipe, id=X, path=... argument ?
by Jason Vas Dias 05 Jan '15

05 Jan '15

Please can anyone enlighten me as to why linux qemu-kvm always creates the console on my terminal, when I am trying to direct all of its input and output to a pipe ? I have created : $ mkfifo /tmp/el6x32{.in,.out,.monitor} and use the command: $ /usr/libexec/qemu-kvm -M rhel6.4.0 -cpu n270 -smp 1 \ -hda /home/rpmbuild/OEL6/img/OEL6_32.img \ -kernel /home/rpmbuild/OEL6/boot/vmlinuz-2.6.39-400.215.14.el6uek.i686 \ -initrd /home/rpmbuild/OEL6/boot/initramfs 2.6.39-400.215.14.el6uek.i686.img \ -append 'root=/dev/sda rw selinux=0 enforcing=0 console=0' \ -m 2048 -k en-gb -nographic -vga none -vnc none -enable-kvm \ -chardev pipe,id=0,path=/tmp/el6x32 -monitor pipe:/tmp/el6x32.monitor But this ends up with the kernel's console on qemu-kvm's STDIO . I actually want the console to be redirected to take input from /tmp/el6x32.in and direct output to /tmp/el6x32.out - I thought that was what the above '-chardev pipe,id=0,path=/tmp/el6x32' should do if kernel boot params 'console=0' is also supplied ? Why isn't this happening for me ? Anyone got a guest to read console input from a pipe and direct console output to a pipe ? If so, how? Thanks in advance for any replies, Jason.

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[libvirt-users] Please help me!Thank You!
by 75124955 04 Jan '15

04 Jan '15

I am using Libvirt virsh command by vmware esx created a virtual host, has been unable to create success. My creation process is as follows : Create a virtual host XML file content is as follows: <domain type='vmware'> <name>test1</name> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64'>hvm</type> </os> <devices> <disk type='file' device='disk'> <source file='[datastore1 (2)] test1/test1.vmdk'/> <target dev='sda' bus='scsi'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='scsi' index='0' model='vmpvscsi'/> <controller type='ide' index='0'/> <interface type='bridge'> <source bridge='VM Network'/> </interface> </devices> </domain> Has been unable to create the VMDK files, can you tell me what reason be? Thank you very much ! I will always wait for your reply, this problem is very important to me.

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[libvirt-users] Console access for a user.
by Le Bris Gilles 02 Jan '15

02 Jan '15

Hi, I would like to allow a user (non-root) to access the console of his VM (he's got root access on it). Using sudo doesn't seem to work: /bin/virsh console vm error: failed to get domain 'vm' error: Domain not found: no domain with matching name 'vm' If I assign suid to virsh, I get: 'error: Failed to initialize libvirt' I don't see any information on Internet about this. What is the procedure to follow to get this result (QEMU conf, libvirt conf, etc)? Thank you in advance.

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[libvirt-users] Bhyve drv creates duplicate tap0 references
by William B 30 Dec '14

30 Dec '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Good morning, I am not sure if this is a known issue or if I should raise as a bug. When using libvirt 1.2.11 on FreeBSD 10.1-RELEASE with bhyve, I have notice that a machine which defines: <interface type='bridge'> <mac address='52:54:00:88:44:08'/> <source bridge='bridge10'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </interface> <interface type='bridge'> <mac address='52:54:00:42:8f:c1'/> <source bridge='bridge11'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> Generates a bhyve command from domxml-to-native that contains the interfaces such that: - -s 2:0,virtio-net,tap0,mac=52:54:00:88:44:08 -s 3:0,virtio-net,tap0,mac=52:54:00:42:8f:c1 As a result, in this configuration, no network traffic works due to the duplication of the tap0 device in each command. When running two machines simultaneously, both are allocated to tap0, again causing issues. Is this a known issue? Please include me in replies as I am offlist. - -- Sincerely, William Brown -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBAgAGBQJUoeiHAAoJEO/EFteBqAmaA2EP/ixYU792vc4K41jnI2Z+cC11 PVMEI4YFiaBwU4xBE7FpOrgnz/oVOKE5r4/PYM+M+c460yJMeEHbUQ3haH0meciN TuiOBB2uOx2mvaPBbOKL2Kd8u3poR7nBwwisDD6M81HhCGNan1uFoTzCXswZGlEn C0EgXHh2wTUVl3HWYbKXW6WmuhYTn8IHuPFjWNKGwJdHOzVYOPfmIiMU/qLlNNG1 FEjf+FS9yjuzBFSa6QszQG10DSPNJ6KghDxCVj2hUl0FHHcYbukbHa4FGwc261i0 h6MII67/27ZIaYA+7yqL2A9pa4Pj1FQ/IWWzuemG4TAbETLIEps4PrFvXLHgX0l/ KYE/5vysYrWjNXs6RXQwEcRBPxOHxhrAdl2t6FkYDSGf27WIwEepSPlo3r/bCenZ 5z6RkIq3HRdZy4bnZPcy1hUOOKKDrq2PXRJ3DIWDktfmpHf+IyCBb7jEKUQU8cL8 4ODeHFrQ8RcvEmXvLHk8Gt1y5/cOhs2VI9JDf0IZLfPi3+OETDY54pI7PPkv8mya LmDS9YdmDfAdks/wTX1a4F80g0m4qR5X9HvgUu0bGSq3k5mefRFzi3PLf45tiKXo 9kEYrq9wmd2b4YIdPzdANE/NAz9sLM/phJNqSoVbHhxgOtAMNr2XPs0l9J/e2cUa OuFCyESOu2iKL3C5fCU1 =tL0W -----END PGP SIGNATURE-----

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Re: [libvirt-users] Using virsh blockcopy -- what's it supposed to accomplish?
by Gary R Hook 24 Dec '14

24 Dec '14

On 12/23/14 2:08 PM, Eric Blake wrote: > On 12/23/2014 11:35 AM, Gary R Hook wrote: >> On 12/22/14 4:50 PM, Eric Blake wrote: >>> On 12/22/2014 03:27 PM, Gary R Hook wrote: >>>> I am experimenting with the blockcopy command, and after figuring out >>>> how to integrate qemu-nbd, nbd-client and >>>> dumpxml/undefine/blockcopy/define/et. al. I have one remaining question: >>>> >>>> What's the point? >>> >>> Among other uses, live storage migration. >> >> There is so very much to say here, but I will endeavor to be brief and >> to the point. Please note that I am working with libvirt 1.2.2, as >> stated in my OP. And up front; I'm pretty sure I'm missing data points >> and working from a position of ignorance and unreasonable expectation. > > Did you mean for this to go to the list? Usually, having discussions > like this in public archives will benefit more people, and allow others > to chime in. > > https://rwmj.wordpress.com/2010/11/08/want-help-dont-email-me-directly/ Dang, dang, dang, dang, dang. Yes, of course I did. *sigh*. Will resend to the list. Please ignore. -- Gary R Hook Senior Kernel Engineer NIMBOXX, Inc

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[libvirt-users] "virsh list" does not show anything after reboot [newbie]
by Kevin Wilson 23 Dec '14

23 Dec '14

Hi, libvirt users and gurus, I am a newbie to visualization, hope this question is not too silly, please bear with me. I had installed three guest on Fedora 21 with the virt-install tool, by: virt-install --name=f21_x86_64_guest --file=/var/lib/libvirt/images/guest.qcow2 --cdrom /workStorage/work/down/f21/Fedora-Live-Workstation-x86_64-21-5.iso --ram=2048 virt-install --name=f21_x86_64_guest1 --file=/var/lib/libvirt/images/guest.qcow2 --cdrom /workStorage/work/down/f21/Fedora-Live-Workstation-x86_64-21-5.iso --ram=2048 --force virt-install --name=f21_x86_64_guest2 --file=/var/lib/libvirt/images/guest.qcow2 --cdrom /workStorage/work/down/f21/Fedora-Live-Workstation-x86_64-21-5.iso --ram=2048 --force When runing "virsh list" I see these three guests as running. Now, I rebooted the machine, and "virsh list" does not show anything. It turned out that running "systemctl status libvirtd" showed some error (about some NFS path which was not found), and once I fixed that, I restarted the libvirtd, and this time running "systemctl status libvirtd" showed that it is running OK. Yet, runnig "virsh list" does not show anything Any ideas ? what I should do to run one of these guest I created before booting the machine ? Regards, Kevin

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[libvirt-users] why CPU pinning doesn't take effect when using lxc-enter-namespace to run an application
by WANG Cheng D 23 Dec '14

23 Dec '14

Dear all, I want my container to run on the third CPU core and I define this by the following xml scrpits: <vcpu placement="static" cpuset="3">1</vcpu> When I run my application in a container terminal, I can see the application runs on the third core as expected. When I run my application using lxc-enter-namespace, the CPU pinning doesn't take effect, i.e., the application runs on a core which isn't the third one. How can I solve this problem? Any replies are highly appreciated. Cheng

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[libvirt-users] Device attach event
by Marek Marczykowski-Górecki 22 Dec '14

22 Dec '14

Hi all, I'm trying to use libvirt events API, but I can't find what event is fired when some device (disk in this case) got attached to the domain. In the docs I see only VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED, but not VIR_DOMAIN_EVENT_ID_DEVICE_ATTACHED. Is there some event for that? BTW libxl driver implements only VIR_DOMAIN_EVENT_ID_LIFECYCLE, but that's another story... -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing?

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