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Re: [libvirt-users] automatically detaching PCI host devices from guest for SRIOV usage.
by Rajesh Kumar Mallah 23 Aug '12

23 Aug '12

| Dear Alex , | | What logging level is useful for you ? | | Dear Rajesh, | | Level 1 (Debug) should be enough, but I guess it probably hasn't more | help for us, you had better to login the guest then check network when you were | meeting this issue again, for example, to check if network configuration is valid and try | to restart relevant network services to see if the guest network can work again | or something like that, In addition, you shut down the guest via running 'halt' in | the guest,| Does it work for you if you use libvirt relevant interface such as | 'virsh shutdown guest' | or 'virsh destroy guest'? Dear Alex , The Guest is a minimal debian squeeze install without any GUI desktop in it . Below is the relevant /etc/network/interfaces file. # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug eth0 auto eth0 iface eth0 inet static address 192.168.101.11 netmask 255.255.0.0 gateway 192.168.1.1 ------------------------- end of interfaces file ---------------- the allow-hotplug on eth0 allow network to be automatically configured once the attach-device is done. similarly detach-device is handled gracefully. Before posting we have done multiple permutations and combinations of many config parameters and activities. This includes shutting down the guest via 'halt' and 'destroy|shutdown' from the virsh interface. It does not help or makes difference. Most surprisingly there is no alarming messages that are shown in any of the logs , be it the syslog of host or syslog of guest, I have however not seen the libvirtd.log in debug mode which i shall do in a while. I would also like to tell that the issues was discussed in the intel forum but no conclusive solution could be found. The link is: http://communities.intel.com/message/164211#164211 I am sorry for the bit late response but i assure my continued feedback regarding this issue. We are working on a test (spare) hardware and it is easy for us to test any configuration or patches The platform is : SuperMicro AMD Opteron Hardware , with IOMMU and SRIOV enabled , intel 82599EB based dual SFP+ port , linux kernel 3.5.1 from kernel.org. Regds mallah | | | Regards, | Alex | | | | Regards, | Rajesh Kumar Mallah | Tel. 91-11-46710500 (Ext:303) | Cell +919811255597 | Website: http://www.tradeindia.com/ | \|/ \|/ \|/ stop printing \|/ \|/ \|/ | | | | start planting | | |

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[libvirt-users] libvir: Domain Config error : internal error incorrect root element
by 何鑫 22 Aug '12

22 Aug '12

hi, When I use dom = virDomainDefineXML(conn, xml) to define xml, I countered a problem that " libvir: Domain Config error : internal error incorrect root element". Could you please tell me what's wrong with it? I tend to debug such problem above by gdb to step into virDomainDefineXML. When I press "step" in gdb, the console just shows the wrong messages, so I fail to access to the internal function of virDomainDefineXML. My libvirt's version is 0.98 allowing debug with the command "CFLAGS = -g -O2" in libvirt's Makefile. I installed libvirt-bin by "sudo apt-get install libvirt-bin"in ubuntu. Is there something wrong in my installing steps? Thanks a lot! Best Regards, Corey

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[libvirt-users] virsh command vol-upload purpose question
by Li, Chun Wen 22 Aug '12

22 Aug '12

I use virsh vol-upload to upload some data in a volume and use vol-download to download these data from the same volume, both these two commands work well. However, when I first use these two commands, I thought I can use vol-upload to upload some file, then attach this volume to a vm, and access the upload file in this vm. I did this experiment, bud it not success. Once I upload a file into a volume, attach it to a vm, then the vm can not recognize the file type of this vm, if I mkfs to the volume, the file I upload disappear. So, my question is the purpose of the vol-upload is just to save some data in the volume outside vm? And at this point do we have method to access the data upload to the volume from vm? Thanks Bests Kimi Li

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[libvirt-users] What can cause "libvirtd dead but pid file exists."
by xuanmao_001 22 Aug '12

22 Aug '12

Hi, Eric: I noticed that: # service libvirtd status libvirtd dead but pid file exists. I operated VMs(like create, edit, delte) normally for a second, but the libvirtd on host was dead. I checked the libvirtd.log but didn't find any useful information. so I want to know what can cause the problem? another question: I found the message in /var/log/message like "libvirtd: Could not find keytab file: /etc/libvirt/krb5.tab: Permission denied." what is going wrong? my libvirt version: 0.9.8. thanks. xuanmao_001

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[libvirt-users] Finding cause when "virsh list" hangs
by Whit Blauvelt 22 Aug '12

22 Aug '12

Hi, Did something dumb - had two VM hosts with DRBD mirroring of VMs on the same UPS, which failed and crashed them both. While I've got VMs running now on both, "virsh list" and "virsh start" and so on are just hanging. I'm not seeing it log anything in these instances - just hanging. Both systems are Ubuntu 10.10, one with the stock libvirtd 0.8.3 and one with 0.9.12 compiled from source. They each brought up their autostart VMs okay. But I've got no working virsh shell on either now. The 0.9.12 host was, to complicate this report, okay with virsh initially, or "virsh list" anyway. But it hung with a "virsh start," and now "virsh list" fails too. So ... what should I look for to have been left where by the crash that's making virsh hang? Is there any way to get virsh to provide debugging info in a coffee-addled-friendly way? I've of course Googled "virsh list" hanging, but without finding anything that seems to directly apply to my case, although it's been seen before. Thanks, Whit

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[libvirt-users] disappeared VM in virsh
by Akendo 21 Aug '12

21 Aug '12

Hi guys, one of my VM has disappeared in libvirtd. I still can see the process with ps and the configuration file is as well there. But it is not displayed or found with virt-manger/virsh. virsh list shows only 4 of 5, but there is no real error message. I restarted the daemon without solving the problem. Any idea what to do? Here some info: Compiled against library: libvir 0.9.13 Using library: libvir 0.9.13 Using API: QEMU 0.9.13 Running hypervisor: QEMU 0.12.1 uname -a Linux 2.6.32-220.17.1.el6.x86_64 #1 SMP Wed May 16 00:01:37 BST 2012 x86_64 x86_64 x86_64 GNU/Linux It's a CentOS 6 so far Akendo

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[libvirt-users] Libvirt Qemu compatibility
by Shawn Furrow 21 Aug '12

21 Aug '12

Hi all, I am using Ubuntu 10.04 Server and I am trying to figure out which versions of qemu-kvm and libvirt are known to work well together and if there is anything special that needs to be done during their installs. I am trying to work with the latest version of libvirt possible that will be stable with qemu-kvm. Right now, the only configuration I've been able to get working are the "libvirt-bin" and "qemu-kvm" distribution packages. However, I would like to at least install libvirt from source because I want to have access to the source code and make minor changes. Thanks, Shawn -- Virginia Tech Bradley Department of Electrical and Computer Engineering B.S. Electrical Engineering B.S. Computer Engineering

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[libvirt-users] IP over IB support.
by Eric J Nelson 21 Aug '12

21 Aug '12

Hello, I'm trying to set up a lxc container with access to a Infiniband card with IP over IB. I have scripts written to create the device in the container and add all the proper cgroup permissions on the host. I can access the card from the container, but there is no Infiniband network device present. I can't create the ib0 and ib1, and I have come to believe this is because they are made on the host when the modules are inserted. Is inserting modules possible with lxc and libvirt? Is it currently possible to use IP over IB in any of the virtualization technologies that libvirt supports? I'm not bound to lxc. Eric Nelson

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[libvirt-users] capabilities mismatch
by Sean Abbott 21 Aug '12

21 Aug '12

So I have two instances of opennebula running libvirst/kvm. They were both installed using identical methods (a bit of a black box, frankly) on slightly different hardware. (one is "nephalem" intel, the other is "westmere". That's the only difference.) in fact, an architecture check from a kernel standpoint seems to come back identical. (unless my understanding of uname -a is incomplete, which seems likely) Old machine: Linux my.old.machine.com 2.6.38-7.2.0.2-amd64-8993020 #1 SMP Fri Dec 16 23:01:26 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux New machine: Linux my.new.machine.com 2.6.38-7.2.0.2-amd64-8993020 #1 SMP Fri Dec 16 23:01:26 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux However, the capabilities in virsh are very different. The new machine has i686 instead of x86_64,and it is missing the guest KVM domain type. Old capabilities: http://pastebin.com/EptdUYiG New capabilities: http://pastebin.com/pke4MGFJ Two questions: First, any idea why it might've come down differently. Second, can it be fixed? Can I try just copying the capabilities from old to new? Or something equally straightforward?

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[libvirt-users] storage pool does not support volume creation
by zhijun liu 21 Aug '12

21 Aug '12

hi,all I use iscsi create stroage pool,now i want create a volume on the pool,but encouner a error: error: Failed to create vol from volume.xml error: this function is not supported by the connection driver: storage pool does not support volume creation else replacing way to resolve this problem?? thanks

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