June 2012 - Users - libvirt List Archives

[libvirt-users] getting name or uuid of vm within guest OS
by Behrooz 21 Jun '12

21 Jun '12

Hi, for tl;dr people: how we can get uuid or name of a vm within a guest os? description: We are trying to implement a guest-agent for Archipel* to let us run simple commands on guest os**. in archipel each vm has its own jid (jabber id), user will open a chat conversation to vm's jid and send messages like "!exec ls", then we check that user (jid) who sent !exec has permission to run commands on our guest. if he/she had permission we will send a message to jid of guest-agent with message "ls", guest-agent will run command then will send result to vm's jid and we tunnel result to user. now problem is that we don't know (in guest-agent) that what xmpp server we should connect to and what jid is trusted to recieve command from. xmpp server is running on hypervisor and trusted jid is {uuid-of-jvm}(a)hypervisor.com. right now we've used internal dhcp to set hostname of guest os to something like "uuid-of-jvm.hypervisor.com" using this switch (qemu): -net user,hostname=uuid-of-jvm.hypervisor.com it works but it's not best solution as it only works with qemu and we need a solution that works with other virtualization platforms that libvirt supports. * https://github.com/ArchipelProject/ ** yes, we know about vnc / ssh / ... but by implementing such thing we can add cool stuff in archipel like status of services that are running on guest os. -- regards, behrooz

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[libvirt-users] How to obtain guest's monthly internet bandwidth usage?
by Tony Huang 21 Jun '12

21 Jun '12

Hello, I want to monitor the outgoing and incoming monthly internet usage. How can I do that? -- Tony

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[libvirt-users] update virDomainDef with xml config
by xuanmao_001 20 Jun '12

20 Jun '12

Libvirt Version: 0.9.8 Hi: I added a new api for qemu_driver. and both added libvirt.c and remote. I tested it and it worked well. the function of this new api was add a new field in xml config of domain. (I added it like qemudDomainSetMemoryFlags)at the same time, I added a new member to struct virDomainDef. then I tested xml config converted to virDomaindef and virDomainDef converted to xml config both well(just tested this new api). But there was a problem, if I change the memory size or cpu number then apply it with virtManager. the xml config was changed. but there is no field in the xml what I added. I guest the virDomainDef member in virDomainObjPtr wasn't update. I have no idea, can you give me some ideas? thanks! here is my code in qemu_driver.c: static int qemudDomainSetCustomOptions(virDomainPtr dom, char *opt) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; virDomainDefPtr persistentDef = NULL; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemuReportError(VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0) goto cleanup; if (!vm->persistent) { qemuReportError(VIR_ERR_OPERATION_INVALID, "%s", _("cannot change persistent config of a transient domain")); goto endjob; } if (!(persistentDef = virDomainObjGetPersistentDef(driver->caps, vm))) goto endjob; sa_assert(persistentDef); persistentDef->running_mode = opt; ret = virDomainSaveConfig(driver->configDir, persistentDef); ret = 0; endjob: if (qemuDomainObjEndJob(driver, vm) == 0) vm = NULL; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } xuanmao_001

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[libvirt-users] caps->nguests == 0?
by Zhihua Che 20 Jun '12

20 Jun '12

hi, I compiled the libvirt-0.9.10 and started the libvirtd with sudo. Unfortunately, I got an Error, saying 'virDomainDefParseXML unknown OS type hvm'. I debugged it and found in function virCapabilitiesSupportsGuestOSType, the parameter caps->nguests is 0. On the other hand, I tried start the libvirtd with common user, and creating domain with virsh, i found the caps->ngusts is 2 and had one value 'hvm', so it didn't complain the error above, instead, it complained could not load PC BIOS bios.bin. I'd say I searched a lot and people say it's caused by without loading kvm and kvm-intel module. So, I checked and it is loaded. Any tips here?

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[libvirt-users] unsupported configuration: Reboot is not supported with this QEMU binary
by Xing.x.Gao 19 Jun '12

19 Jun '12

Hello, when i use virsh to reboot a guest,it report a "unsupported configuration: Reboot is not supported with this QEMU binary" error . my libvirt version 0.9.10 and i've tried 0.9.11/12 ,the debug info is in the attachment libvirtd.log, virsh # version --daemon Compiled against library: libvir 0.9.10 Using library: libvir 0.9.10 Using API: QEMU 0.9.10 Running hypervisor: QEMU 0.14.0 Running against daemon: 0.9.10 virsh # list Id Name State ---------------------------------------------------- 6 win7 running 7 f16 running virsh # reboot f16 error: Failed to reboot domain f16 error: unsupported configuration: Reboot is not supported with this QEMU binary thanks.

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[libvirt-users] How to update the QEMU of libvirt?
by GaoYi 18 Jun '12

18 Jun '12

Hi all, I type "version" and the virsh outputs: Compiling library: libvir 0.6.3 ... Management: QEMU 0.9.1 Now I wanna update the QEMU to qemu-kvm-0.14.0. I don't know how to. Can anybody provide any help? Yi

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[libvirt-users] How to set cpu limits to xen domU in libvirt
by Tony Huang 18 Jun '12

18 Jun '12

Hello, I looked in the the documents. Looks like the <cputune> period and quota will only support qemu driver. Of for xen user, how to set the hard cpu limit? -- Tony

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Re: [libvirt-users] [Qemu-devel] How to management KVM virtual machines via libvirt?
by 陳韋任 (Wei-Ren Chen) 18 Jun '12

18 Jun '12

CC'ed to libvirt-users. On Sat, Jun 16, 2012 at 07:00:59PM +0800, GaoYi wrote: > Hi all, > > I am trying to management the VMs created by KVM commandline. However, I > found the libvirt cannot connect to the VMs or manage it from virsh. Can > anybody provide any help? > Best, Shouldn't this go to libvirt mailing list? http://libvirt.org/contact.html Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667 Homepage: http://people.cs.nctu.edu.tw/~chenwj

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[libvirt-users] question regarding CMPIObjectPath
by Ashish Dalela 14 Jun '12

14 Jun '12

Folks, I'm a new user and I'm trying to build a standalone application using libvirt-cim (rather than use a full-fledged CIMOM). I need some help. While calling the CMPIInstanceMI->ft->enumerateInstances, I need to pass a reference to CMPIObjectPath. My application is crashing because I don't know what is the correct constructor for this. If I do ref = CMPIObjectPath () then all the FT pointers are null. Can someone please guide me on how to construct CMPIObjectPath instance before passing to enumerateInstances? Thanks much Ashish

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[libvirt-users] can not connect hypervisor using libvirt-0.9.11 on windows
by xuteng 14 Jun '12

14 Jun '12

Hi,ALL: I compiled the libvirt-0.9.11 source code with mingw on windows according to the website: https://github.com/photron/msys_setup Then I wrote a simple test case ,as below: #include <stdio.h> #include <stdlib.h> #include "libvirt/libvirt.h" int main(int argc,char **argv) { virConnectPtr conn; conn = virConnectOpen("qemu+tcp://192.168.1.6/system"); if (conn = NULL) { fprintf(stderr,"Failed to open connection to qemu+tcp://192.168.1.6/system"); return 1; } virConnectClose(conn); return 0; } When linked to the dll just compiled , it came out with error : NOTE: you should run 'diskperf -y' to enable the disk statistics libvir: RPC error : Unable to set close-on-exec flag: No such file or directory libvir: error : invalid connection pointer in virConnectClose When using gdb to debug the testcase , break the function virConnectOpen , then step ,the error info was: Program received signal ?,Unknown signal. 0x7c92e4ff in ntdll!LdrAlternateResourcesEnabled () from C:\WINDOWS.0\system32\ntdll.dll Any suggestion would be appreciated ! Best Regards! xuteng via foxmail

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