January 2014 - Users - libvirt List Archives

Re: [libvirt-users] How to find domain os type and ip address
by Rathidevi 29 Jan '14

29 Jan '14

Hi All, I am using the libvirt-0.5.1.jar and downloaded from this link ftp://libvirt.org/libvirt/java. 1) To find the os type of domain I use this method getOSType(). But it returns the kvm or hvm instead of windows and linux. Is the any way to find the original os type of domain? 2) Please give is there any option or method available to find the ipaddress of domain? Thanks & Regards Rathidevi

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[libvirt-users] Does libvirt support attach volume to linux container now?
by Du Jun 29 Jan '14

29 Jan '14

Hi all, I am playing with linux container and using libvirt to manage linux container. I find I fail to attach volume to linux container via libvirt and I got the following error message: Failed to attach volume: data-111 to VM: lxc-111; org.libvirt.LibvirtException: unsupported configuration: Can't setup disk for non-block device. My question is that does libvirt support attaching volume to linux container? If it supports, what version should I use? Thanks, DuJun

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[libvirt-users] Problems with pmsuspend/wakeup
by Alex 26 Jan '14

26 Jan '14

Hi, I've migrated a Windows7 vm from F17 to F20 and it appears to be working okay. Apparently when it's left idle for some period, it automatically goes into a pmsuspend state, and I'm unable to wake it. I've figured out the virsh dompmwakeup command, which then virsh shows it's running, but the vm is still unresponsive. It doesn't respond to ping and the display is just black when accessing it through virt-manager. Is there something I need to do in the guest for it to wake up properly? How can I just prevent it from ever suspending in the first place? Thanks, Alex

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[libvirt-users] Libvirt support for VEB
by Padmanabhan Krishnan 24 Jan '14

24 Jan '14

Hello, I have a setup of virtual machines and wherein my virtual switch (OVS) takes care of switching locally and it uses the network for talking to VM's outside the server (like a VEB scenario I guess). I want Netlink messages to be sent to LLDPAD. I understand that i had to modify the XML files and start the VM. But, i see from the XML that it supports only VEPA, not VEB. But, irrespective of VEB or VEPA, those VM information should be known to the upstream switch through VDP. 802.1QBG seem to support this (both VEPA and VEB) http://www.ieee802.org/1/files/private/bg-drafts/d2/802-1qbg-d2-2.pdf But, for VEB, no net link messages are sent by libvirt. Why is that? From the XML example, I see that: <interface type=’direct’> <mac address=’d0:0f:d0:0f:02:01’/> <source dev=’eth2.20’ mode=’vepa’/> <source network=’default’/> <virtualport type=’802.1Qbg’> <parameters managerid=’12’ typeid=’0x123456’ typeidversion=’1’ instanceid=’09b00c53-8b5c-4eeb-8f00-d847aa05191b’ /> </virtualport> I tried different combinations by changing the interface type to bridge and and trying Qbg as in below, I find that it doesn't send a Netlink message to LLDPAD. There's no "mode=veb". </controller> <interface type='bridge'> <mac address='00:54:00:4e:46:04'/> <source bridge='xml_br'/> <virtualport type='802.1Qbg'> <parameters managerid='12' typeid='1193046' typeidversion='1' instanceid='09b00c53-8b5c-4eeb-8f00-d847aa05191b'/> </virtualport> <target dev='tap_xml'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> How do i get this to work? Is this a limitation? Thanks, KP

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Re: [libvirt-users] PCI Passthrough
by The PowerTool 23 Jan '14

23 Jan '14

Oops! I blame Microsoft. I use Hotmail and am very, very unhappy that MS bought them out which leaves me stuck with Outlook, which sucks. I've always just hit reply in the past and it's worked. Now I'm going to have to be careful to make sure my replies go where I expect them. Thank you very much for the information. I was really hoping to consolidate systems but that apparently won't happen in the near future. So that means I'll be focusing my efforts on getting my Spacewalk server updated and then upgrading from F18 to F20 or 21. Yep, I was very aware of F18 dropping and thankful for the one brief delay. I'll be taking a look at it again once I upgrade to the current Fedora. If that doesn't work I'll wait and keep an eye on posts and when things look better probably get new hardware (which will likely be the requirement). Thanks, again! Date: Thu, 23 Jan 2014 11:37:02 +0200 From: laine(a)laine.org To: thepowertool_sc(a)hotmail.com Subject: Re: [libvirt-users] PCI Passthrough On 01/21/2014 05:32 PM, The PowerTool wrote: Laine, Thank you very much for your response. I took a look at the first link you provide (archlinux). Key items that caught my attention (in order): 1. "Intel IGDs won't work"--I have Intel integrated video 2. "NOTE: THIS IS EXPERIMENTAL SO IT MIGHT NOT WORK FOR YOU" (self-explanatory) One additional note: When I received the "permission denied" error I had the same thought as you. I was unaware of the issue you outlined with libvirt needing to be configured to run as root on some versions of Fedora. Still, as root I did successfully detach my video card... at least that's how it appeared given the monitor went no-signal and then displayed a strange pattern. The system wouldn't ping and failed to respond to ssh attempts. I had to reboot to recover. I tried a second experiment where I first started a ssh session and then detached (from the host). Going back to the 2nd system the ssh session stopped responding. Actually that's probably more of an indication that your kernel just doesn't properly handle having the primary video device disappear midstream. You may have different results if you connected two video cards to a system, and tried to passthrough the secondary (it still probably wouldn't work, but it would likely fail in a different way). That leads me to believe it's not fully baked, something critically fails, and it's not going to work for me at-least at my current levels. Alex Williamson gave a talk at this year's KVM Forum (in October) about the difficulties of making VGA passthrough work, and it was truly frightening; there are just too many strange, undocumented backdoors in the devices that are required by the drivers for proper operation. In my mind this whole area just has too great of a likelihood of total failure without possibility of making it work in a reasonable time frame. To answer your question: I'm running Fedora 18. F18 was definitely one of the releases that was broken wrt PCI passthrough requiring qemu to be run as root. I don't recall if the kernel guys ever fixed it in that version or not. I pestered them about it for months, then finally gave up. BTW, you know that F18 has just gone end-of-life, right? This means no more updates of any type, even security updates. You can actually upgrade your F18 machine to F19, and F19 to F20, using the "fedup" package (I haven't tried using fedup to go directly from F18 to F20, but I suppose you could look into it). *A lot* has changed in virtualization in the last year, and as a bonus, you'll be covered for security fixes for another year. Is there a place where I can follow updates and see PCI pass-through mature so I'll know when next to try? Well, you could try the qemu-devel mailing list, but it's pretty high traffic, and very few of the messages would be on this particular topic. That *is* the place where any discussion would take place, though. Thank you, again, for your help! BTW, it's best to keep all messages on the list rather than private replies. That way someone else with better information may reply (and people very often get busy and disappear for several days/weeks at a time, so it's better to not rely on a response from a single person)

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[libvirt-users] Newbie question about network setup
by hubert depesz lubaczewski 23 Jan '14

23 Jan '14

Hi, I've read some docs, and have some ideas, but before I'll go any further, I'd like to get confirmation if I'm understanding it right. Let's assume that on my host I want to have 5 different guests, but they shouldn't be able to communicate with each other. Is the solution to it addition of 5 separate "networks" in libvirt, and then connecting each guest to its own "network"? Looks sensible, but perhaps I'm overlooking something. Best regards, depesz -- The best thing about modern society is how easy it is to avoid contact with it. http://depesz.com/

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[libvirt-users] Using Java bindings to event callback
by Howie 23 Jan '14

23 Jan '14

Hi My test environment : CentOS 6.3 6.4 Ubuntu 13.10 For CentOS 6.4 libvirt-java-0.4.9-1.el6.noarch libvirt-python-0.10.2-29.el6.x86_64 libvirt-client-0.10.2-29.el6.x86_64 libvirt-0.10.2-29.el6.x86_64 I am try to use java bindings to event callback. int register = conn.domainEventRegisterAny(null, 0, cb); But always get the following error message: libvirt: Remote Driver error : adding cb to list exception caught:org.libvirt.LibvirtException: adding cb to list level:VIR_ERR_ERROR code:VIR_ERR_RPC domain:VIR_FROM_REMOTE hasConn:false hasDom:false hasNet:false message:adding cb to list str1:%s str2:adding cb to list str3:null int1:-1 int2:-1 By the way I also trace the mail list *[libvirt] [PATCH] Java bindings for domain events* (2008 Nov 07) *[libvirt] [PATCH 1/2] Java bindings for domain events**[libvirt] [PATCH 2/2] Java bindings for domain events* (2008 Nov 18) --> Reject patch*Re: [libvirt] [PATCH 1/2] Java bindings for domain events* (2008 Dec) —>No Result*[libvirt-users] Using Java bindings to event callback * (2010 Jul) —>No Result *[libvirt] [PATCH 0/2] Libvirt-java event handling (2011Jul)* —> I think most drivers don't support that. We have a custom driver for our hypervisor and it works. *[libvirt] [libvirt-java] [PATCH 00/12] event support* (2013 Jan) —> *Re: [libvirt] [libvirt-java] [PATCH 00/12] event support (2013 Mar)* --> No Result Any suggestions? Thanks, Howie

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[libvirt-users] running LXC hello world example
by Jacob Everist 23 Jan '14

23 Jan '14

Hello, I am having difficulty getting any sort of LXC container running. I am trying to use the following tutorial to run the hello world example: https://www.berrange.com/posts/2011/09/27/getting-started-with-lxc-using-li… Here are the results of my running the tutorial: [root@terraria ~]# virsh list Id Name State ---------------------------------------------------- [root@terraria ~]# virsh uri lxc:/// [root@terraria ~]# cat helloworld.xml <domain type='lxc'> <name>helloworld</name> <memory>102400</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <devices> <console type='pty'/> </devices> </domain> [root@terraria ~]# virsh define helloworld.xml Domain helloworld defined from helloworld.xml [root@terraria ~]# virsh start helloworld error: Failed to start domain helloworld error: internal error guest failed to start: PATH=/bin:/sbin TERM=linux container=lxc-libvirt container_uuid=791640de-95a9-082c-7292-c55106bcdca9 LIBVIRT_LXC_UUID=791640de-95a9-082c-7292-c55106bcdca9 LIBVIRT_LXC_NAME=helloworld /bin/sh error receiving signal from container: Input/output error --- As you can see, I am getting an error. How do I go about diagnosing this error? This is a fresh install so the only thing I have been using this machine for is for LXC/libvirt testing. -- Jacob Everist cell: 310-425-9732 email: jacob.everist(a)gmail.com

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[libvirt-users] LXC configuration for Systemd in the user namespace.
by Jan Olszak 23 Jan '14

23 Jan '14

Hi there! Does anyone have a config file for libvirt-LXC, that makes it possible to: 1. Use all namespaces (user namespace in particular) 2. Run systemd inside a container. Thanks! Jan

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[libvirt-users] If it's possible for a third-party PCIe card to be shared by multiple containers
by WANG Cheng D 23 Jan '14

23 Jan '14

Dear all, I have a thirty-party PCIe card in my host which can work properly in native mode. I wonder if this card can be shared by multiple containers. As far as the network interface is concerned, too many efforts have been made for it. Two dedicated cgroup resource schedulers/subsystem(net_cls, net_prio) have been provided at the kernel level, and libvirt has also done a lot of work on virtual networking to enable network interface sharing between containers. As it's difficult for me to implement all these things that have been done for network interface, I should find other way to enable sharing of this card. Do you have any idea? Any comments will be high appreciated. Cheng Wang

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