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[libvirt-users] Passing environment variables to LXC container
by Harish Vishwanath 13 Apr '15

13 Apr '15

Hello I am looking for options to pass some ENV variables to an LXC container managed by libvirt. Is it possible to do so from the XML file itself? Something along the lines of qemu command line options? Regards, Harish

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[libvirt-users] CPU Resource Reservation using KVM
by Jatin Davey 13 Apr '15

13 Apr '15

Hi All I am new to KVM world. I have been using VMware for about a year. In VMware world we can reserve cpu resources for a VM. Say for instance if we need 4 vCPUs with a total of 8000 GHz then we can mention this configuration in vCenter while creating a VM. This guarantees 8000 GHz of cpu resources for the deployed VM. How can i achieve the same thing using KVM ? Please provide as much details as possible. Any pointers for reading this would also be helpful. Appreciate your responses in this regard. Thanks Jatin

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[libvirt-users] issue on fedora21 with libvirt-1.2.13 and 1.2.14 - containers won't start at all
by Thierry Parmentelat 11 Apr '15

11 Apr '15

Answering my own question, seems like my problem is very similar to what is reported below for redhat enterprise linux 7 https://bugzilla.redhat.com/show_bug.cgi?id=1209757

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[libvirt-users] issue on fedora21 with libvirt-1.2.13 and 1.2.14 - containers won't start at all
by Thierry Parmentelat 11 Apr '15

11 Apr '15

Hi there I am using fedora21 for hosts and guests, using lxc containers, and was on vanilla 1.2.9 as exposed by the fedora yum repo The other day I was needing the ability to grant mknod capability to some guests, some chap on IRC kindly pointed me at the <capabilities> tag However I was told that needed 1.2.11 So I went and rebuilt from this download http://libvirt.org/sources/libvirt-1.2.14-1.fc21.src.rpm using plain rmbuild —rebuild Once I had upgraded my host with these new rpms it looked like everything was going fine, and my guests indeed were able to mknod However once I rebooted the host, virsh unpleasantly refused to start any of my containers, and complained like this after hanging for 5 to 10 seconds: 2015-04-11 07:44:10.295+0000: 37843: error : virLXCProcessStart:1263 : internal error: guest failed to start: libvirt: error : Failed to terminate process 37905 with SIGKILL: Device or resource busy — At that point I redid the same with 1.2.13, which gave me the same behaviour, and then 1.2.12 which seems to work for me right now — So it looks like 1.2.13 brings me a regression of some kind I am attaching the XML config for one sample domain, mostly they all look alike Should I file a bug report, and if so where should I do that ? thanks — root@buzzcocks ~ # virsh -c lxc:/// dumpxml testmaster setlocale: No such file or directory <domain type='lxc' id='1528'> <name>testmaster</name> <uuid>18989592-f964-4d51-90af-7ecf7719b758</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='auto'>1</vcpu> <numatune> <memory mode='strict' placement='auto'/> </numatune> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/vservers/testmaster'/> <target dir='/'/> </filesystem> <interface type='bridge'> <mac address='52:54:00:ae:8b:47'/> <source bridge='br0'/> <target dev='viftestmaster'/> <guest dev='eth0'/> </interface> <console type='pty' tty='/dev/pts/0'> <source path='/dev/pts/0'/> <target type='lxc' port='0'/> <alias name='console0'/> </console> </devices> </domain>

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[libvirt-users] Detecting that the VM is snapshoting
by Joaquín Rinaudo 10 Apr '15

10 Apr '15

While taking or reverting a snapshot, using virsh --connect qemu:///system dominfo, the state of a VM is paused. Is there a way to distinguish this state (snapshotting) with virsh or any other tools? Joaquín

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[libvirt-users] LXC and syslog seperation (/dev/log)
by James Leu 10 Apr '15

10 Apr '15

Hello, I'm seeing syslog messages "bleed" from the host and other LXC into the messages, maillog, secure logs of other LXCs. I'm using libvirt 1.0.0 on a host with systemd and kernel 3.9.10. Each LXC is running an older non-systemd linux distribution Is this a known issue? Is there a work around? Thank you for you time, Jim -- James R. Leu | Director of Technology | INOC | Madison, WI, USA O: +1-608-204-0203 | F: +1-608-663-4558 | jleu(a)inoc.com | www.inoc.com Service. Not Software.®

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[libvirt-users] raw disks used by guest unavailable to host - retrieve them?
by lejeczek 10 Apr '15

10 Apr '15

hi everybody my guests had drives passed though, like here: <disk type='block' device='lun'> <driver name='qemu' type='raw' cache='none'/> <source dev='/dev/sdv'/> <target dev='sda' bus='scsi'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> guests were Windows 8/2012, now after de-defining guests those disks are still unavailable to host's lvm, pvscan doesn't see. Is there a way to fix it? bw. P

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[libvirt-users] How to get the real migrate speed (MB/s) in the libvirt.
by Edward Young 10 Apr '15

10 Apr '15

Hi all, I start to migrate a VM with its storage using "virsh migrate --live --copy-storage-all ..." command. I'm wondering whether we can get the migration report when the migration is done. For instance, how long it takes to migrate this VM, the total data transferred and etc.. Thanks! Ed

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[libvirt-users] Centos 7.1.1503 + libvirt 1.2.14 = broken direct network mode
by mxs kolo 09 Apr '15

09 Apr '15

Hi all. I use LXC on Centos 7 x86-64, with libvirt version 1.2.6 and 1.2.12 My container has bridged network: # virsh dumpxml test1 <domain type='lxc'> <name>test1</name> <uuid>518539ab-7491-45ab-bb1d-3d7f11bfb0b1</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <memtune> <hard_limit unit='KiB'>1048576</hard_limit> <soft_limit unit='KiB'>1048576</soft_limit> <swap_hard_limit unit='KiB'>2097152</swap_hard_limit> </memtune> <vcpu placement='static'>2</vcpu> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='block' accessmode='passthrough'> <source dev='/dev/data/test1'/> <target dir='/'/> </filesystem> <filesystem type='ram' accessmode='passthrough'> <source usage='524288' units='KiB'/> <target dir='/dev/shm'/> </filesystem> <interface type='direct'> <mac address='02:00:00:1a:a9:54'/> <source dev='br0' mode='bridge'/> </interface> <console type='pty'> <target type='lxc' port='0'/> </console> </devices> </domain> And all was fine, before I accidentally upgraded Centos to 7.1.1503 After upgrade LXC can't start with diagnostic: [root@node14 ~]# virsh start test1 error: Failed to start domain test1 error: internal error: guest failed to start: internal error: Child process (ip link set macvlan0 netns 25263) unexpected exit status 2: RTNETLINK answers: Invalid argument I reinstall libvirt 1.2.14, but catch same error. If someone will experience in solving this problem - it will be interesting to hear about. b.r. Maxim Kozin

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[libvirt-users] XML vm configfile with Display using QEMU GTK interface
by Vinícius Ferrão 09 Apr '15

09 Apr '15

Hello guys, I'm trying to start a VM using the QEMU GTK Display Interface instead of a SDL window. But I'm failing. My actual setting is using SDL with this XML line: <graphics type='sdl' display=':0.0' xauth='/home/ploog/.Xauthority'/> I changed to: <graphics type='gtk'> But it fails to start the VM. Any ideias? Thanks in advance,

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