[libvirt-users] getting name or uuid of vm within guest OS
by Behrooz
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
12 years, 6 months
[libvirt-users] update virDomainDef with xml config
by xuanmao_001
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
12 years, 6 months
[libvirt-users] caps->nguests == 0?
by Zhihua Che
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?
12 years, 6 months
[libvirt-users] unsupported configuration: Reboot is not supported with this QEMU binary
by Xing.x.Gao
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.
12 years, 6 months
[libvirt-users] How to update the QEMU of libvirt?
by GaoYi
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
12 years, 6 months
Re: [libvirt-users] [Qemu-devel] How to management KVM virtual machines via libvirt?
by 陳韋任 (Wei-Ren Chen)
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
12 years, 6 months
[libvirt-users] question regarding CMPIObjectPath
by Ashish Dalela
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
12 years, 6 months
[libvirt-users] can not connect hypervisor using libvirt-0.9.11 on windows
by xuteng
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
12 years, 6 months
