- Users - libvirt List Archives

[libvirt-users] Problems connecting to the libvirtd server
by Stefano Ricci 11 Oct '16

11 Oct '16

Hello everyone I do not know if it is correct address this mailing lists but I can not use libvirt. I run compile libvirt version 2.2.0 into environment lfs stable with qemu 2.7.0 and have not had any problems. The program when it starts not report any errors in the log, with activated debug level file. Only when you try to connect with the following command virsh -c qemu:///system remains hung without reporting any error either in the logs that screen. The command virsh -c test:///default list instead concludes on a regular basis. I attach the file libvirt.log and libvirt.conf Thank you Stefano Ricci

2 1

[libvirt-users] Dealing with swappiness on host systems
by Dennis Jacobfeuerborn 10 Oct '16

10 Oct '16

Hi, I'm looking for a way to prevent qemu processes on a libvirt host to use swap unless there is no physical memory free but apparently this is not as easy as I'd hoped it would be. This is on a CentOS 7 system. At first I tried setting /proc/sys/vm/swappiness to 1 (apparently setting it to 0 now means even the OOM killer takes precedence over swapping: https://www.percona.com/blog/2014/04/28/oom-relation-vm-swappiness0-new-ker… ). After doing this I could still see the used swap increase for a guest even though there were 28G of memory used only as page-cache on the host. Taking another look at it I notices that swappiness can now apparently be controlled on a per-process basis as well by means of using the files under /sys/fs/cgroup/memory/machine.slice however I found no good documentation describing which of the values takes precedence and whether these values can be modified on the fly the same way the files under /proc can. Has anyone pointers to documentation that explains how all of this works? More specifically: Which of these paths take precedence for a running process: /proc/sys/vm/swappiness /sys/fs/cgroup/memory/machine.slice/memory.swappiness /sys/fs/cgroup/memory/machine.slice/<guest-id>/memory.swappiness Can any/all of these values be modified on the fly and if not is there another way to tell qemu to prefer physical memory to swap and only use swap when no physical memory is available? Regards, Dennis

1 0

[libvirt-users] Permission denied for volume create in raw format
by Maciej Nabożny 08 Oct '16

08 Oct '16

Hi, I'm facing similar problem to described here: https://www.redhat.com/archives/libvirt-users/2016-February/msg00033.html I got Libvirt pool mounted over netfs and I'm trying to create new volume, with pool.createXML. When format is qcow2, everything works fine. Unfortunately, for raw images libvirt raises error Permission denied. Whole pool is owned by root. Libvirt starts as root user too. I've tried to change pool's permissions to 777 on filesystem, but i get the same error, only for RAW images. Volume's xml looks like: <volume> <name>{{user.id}}_{{image.id}}</name> <source> </source> <capacity unit='bytes'>{{image.size}}</capacity> <target> <format type='{{ image.format }}'/> <permissions> <mode>660</mode> </permissions> </target> </volume> I've tried to create it without defining permissions, but it's the same. Problem exists in Ubuntu Server 16.04 (libvirt from repo) and Raspbian (libvirt in version 1.2.9). Do you know if it is possible solve this problem with this version of libvirt? -- Maciej Nabożny cloudover.io

2 2

[libvirt-users] Differentiating Disk access from different VMs
by Affan Syed 06 Oct '16

06 Oct '16

All, I have a specific use case where I want to be ale look at vfs or blk_io requests on the host machine and differentiate which VMs the access is originating from. I am assuming a Disk backend, and looking for virsh command or libvirt API that can help me do so. I have tried quite a bit to Google-fu this problem; no such luck. Would love to know if there is some cute trick to do so. Thanks. Affan

2 1

[libvirt-users] What is the purpose behind the unix_sock_admin_perms in libvirtd.conf?
by mordenkainen 30 Sep '16

30 Sep '16

I tried to google any documentation on libvirtd.conf format and options and found nothing. Could you give an insight on how it was supposed to configure libvirtd without comprehensive documentation on it?

2 1

[libvirt-users] About a usage manual
by Dravid kumar 28 Sep '16

28 Sep '16

Dear libvirt devs, can u guys give a usage manual or function list or how to use it example

2 1

[libvirt-users] systemctl libvirt-guests.service fails to start during host boot
by Benoit 27 Sep '16

27 Sep '16

Hi, I have been using qemu and kvm for a while but I am newbie to libvirt. (but I really like it :) I am on Parabola (fork of Archlinux, using systemd) I only got an issue regarding libvirt-guests service, when my host boots about 7 times to 10 I got a issue on the service. ------------------------------------------------------------------------ systemctl status libvirt-guests.service ● libvirt-guests.service - Suspend Active Libvirt Guests Loaded: loaded (/usr/lib/systemd/system/libvirt-guests.service; enabled; vendor preset: disabled) Active: failed (Result: exit-code) since Thu 2016-08-11 10:55:35 CEST; 36s ago Docs: man:libvirtd(8) http://libvirt.org Process: 347 ExecStart=/usr/lib/libvirt/libvirt-guests.sh start (code=exited, status=1/FAILURE) Main PID: 347 (code=exited, status=1/FAILURE) Aug 11 10:55:35 oms_apex_plaisir systemd[1]: Starting Suspend Active Libvirt Guests... Aug 11 10:55:35 oms_apex_plaisir libvirt-guests.sh[347]: Resuming guests on default URI... Aug 11 10:55:35 oms_apex_plaisir libvirt-guests.sh[347]: Resuming guest : error: failed to connect to the hypervisor Aug 11 10:55:35 oms_apex_plaisir libvirt-guests.sh[347]: error: no valid connection Aug 11 10:55:35 oms_apex_plaisir libvirt-guests.sh[347]: error: Failed to connect socket to '/var/run/libvirt/libvirt-sock' no such file Aug 11 10:55:35 oms_apex_plaisir systemd[1]: libvirt-guests.service: Main process exited, code=exited, status=1/FAILURE Aug 11 10:55:35 oms_apex_plaisir systemd[1]: Failed to start Suspend Active Libvirt Guests. Aug 11 10:55:35 oms_apex_plaisir systemd[1]: libvirt-guests.service: Unit entered failed state. Aug 11 10:55:35 oms_apex_plaisir systemd[1]: libvirt-guests.service: Failed with result 'exit-code'. ------------------------------------------------------------------------ it is like the service starts too early. When I restart the service everything is good and if I shutdown it sends the ACPI message correctly to my guests. I already seen lot of discussion but not able to find any working solution.. any idea to help me figure out the issue ? many thanks belette

2 5

[libvirt-users] Where to report Bug?
by Haitham El-Ghareeb 26 Sep '16

26 Sep '16

Hello,Today I got the following error message when I was trying to delete a Virtual Machine using "Virtual Machine Manager" Error is pasted herelibvirt - Permission Denied - Pastebin.com | | | | | | | | | | | libvirt - Permission Denied - Pastebin.com | | | | I know the error is in /usr/lib/python2.7/dist-packages/libvirt.py I am not sure where to report the error. This error is a simple one that can be easily fixed. Hope you can help me submit the error. Apologies for any inconvenience. ~Haitham

2 1

[libvirt-users] libvirt
by i.gerasimov＠wsmgroup.ru 24 Sep '16

24 Sep '16

hi, help me!) i broke my VM, changing configuration file fstab. Now it not boot. How do I get working VM?) and can't connected console -- С уважением, Герасимов Иван Дмитриевич WSM GROUP 8-909-793-01-51 ICQ 682218625

2 1

[libvirt-users] ANNOUNCE: ruby-libvirt 0.7.0
by Chris Lalancette 23 Sep '16

23 Sep '16

I'm pleased to release ruby-libvirt 0.7.0. ruby-libvirt is a ruby wrapper around the libvirt API. The changelog between 0.6.0 and 0.7.0 is: * Fix network lease API to allow arguments that libvirt allows * Implement VIRT_STORAGE_POOL_CREATE flags * Implement more VIR_STORAGE_VOL flags * Implement VIR_DOMAIN_QEMU_AGENT_COMMAND_SHUTDOWN * Implement virDomainDefineXMLFlags * Implement virDomainRename * Implement virDomainSetUserPassword * Implement VIR_DOMAIN_TIME_SYNC * Fix the return value from virStreamSourceFunc so volume upload works Version 0.7.0 is available from http://libvirt.org/ruby: Tarball: http://libvirt.org/ruby/download/ruby-libvirt-0.7.0.tgz Gem: http://libvirt.org/ruby/download/ruby-libvirt-0.7.0.gem It is also available from rubygems.org; to get the latest version, run: $ gem install ruby-libvirt Packages for it are also built for Fedora, and will be released shortly. As usual, if you run into questions, problems, or bugs, please feel free to mail me (clalancette at gmail.com) and the libvirt mailing list. Thanks to those who contributed to this release.

1 0