March 2011 - Users - libvirt List Archives

Re: [libvirt-users] libvirt-users Digest, Vol 15, Issue 25
by Zvi Dubitzky 27 Mar '11

27 Mar '11

Sorry, let me rephrase the question again: I need define a user /password for sasl but want the authentication at runtime be automatic - no explicit promting the user while accessing a tcp socket with some applications that need authentication (e.g libvirt) I try : saslpasswd2 -c -p -a libvirt <user> and it hangs (if i now press Enter it says : "invalid parameter supplied") . if I avoid the -p flag the above commad works fine and prompts for password and later when using the tcp (virsh -c qemu+tcp:...) it prompts for the above defined user/password and autheticates ok. But I want without the explicit authentication The man pages says : "-p Pipe mode - saslpasswd2 will neither prompt for the password nor verify that it was entered correctly. This is the default when standard input is not a terminal. " In the past (before upgrading of libvirt via rpm) I had the SASL authentication done automatically without prompting the user at runtime (virsh qemu+tcp:///system <command> ) and without need to configure that. Don't know how to restore it . Any help ? thanks Zvi Dubitzky Email:dubi@il.ibm.com libvirt-users-bounces(a)redhat.com wrote on 26/03/2011 18:00:08: > From: libvirt-users-request(a)redhat.com > To: libvirt-users(a)redhat.com > Date: 26/03/2011 18:08 > Subject: libvirt-users Digest, Vol 15, Issue 25 > Sent by: libvirt-users-bounces(a)redhat.com > > Send libvirt-users mailing list submissions to > libvirt-users(a)redhat.com > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.redhat.com/mailman/listinfo/libvirt-users > or, via email, send a message with subject or body 'help' to > libvirt-users-request(a)redhat.com > > You can reach the person managing the list at > libvirt-users-owner(a)redhat.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of libvirt-users digest..." > > > Today's Topics: > > 1. saslpasswd2 and virsh -c qemu+tcp:///system <command> > (Zvi Dubitzky) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 26 Mar 2011 16:27:06 +0300 > From: Zvi Dubitzky <DUBI(a)il.ibm.com> > To: libvirt-users(a)redhat.com > Subject: [libvirt-users] saslpasswd2 and virsh -c qemu+tcp:///system > <command> > Message-ID: > <OF80114F71.6895179C-ONC225785F.00498EC8-C225785F.0049E967(a)il.ibm.com> > Content-Type: text/plain; charset="US-ASCII" > > I need define a user /password for sasl but want that to do the > verification > automatically no -promting ( or even maybe avoid the verification) while > using a tcp socket with some applications that need authentication (e.g > libvirt) > > so I try : saslpasswd2 -c -p -a libvirt <user> > > and it hangs (if i now press Enter it says : "invalid parameter > supplied") . if I avoid the -p flag the above commad works fine and > prompts for password and later when using the tc p (virsh -c > qemu+tcp:...) it prompts for the above defined user/password and > autheticates ok . > But I want without the prompting > > The man pages says > -p Pipe mode - saslpasswd2 will neither prompt for the password nor > verify that it was entered correctly. This is the default when standard > input is not a terminal. > > In the past (before some upgrading of libvirt via rpm) the SASL > authentication was done automatically no need for prompting > Don't know how to restore it . > > Any help ? > > thanks > > Zvi Dubitzky > Email:dubi@il.ibm.com > > > > > ------------------------------ > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users > > End of libvirt-users Digest, Vol 15, Issue 25 > *********************************************

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[libvirt-users] saslpasswd2 and virsh -c qemu+tcp:///system <command>
by Zvi Dubitzky 26 Mar '11

26 Mar '11

I need define a user /password for sasl but want that to do the verification automatically no -promting ( or even maybe avoid the verification) while using a tcp socket with some applications that need authentication (e.g libvirt) so I try : saslpasswd2 -c -p -a libvirt <user> and it hangs (if i now press Enter it says : "invalid parameter supplied") . if I avoid the -p flag the above commad works fine and prompts for password and later when using the tc p (virsh -c qemu+tcp:...) it prompts for the above defined user/password and autheticates ok . But I want without the prompting The man pages says -p Pipe mode - saslpasswd2 will neither prompt for the password nor verify that it was entered correctly. This is the default when standard input is not a terminal. In the past (before some upgrading of libvirt via rpm) the SASL authentication was done automatically no need for prompting Don't know how to restore it . Any help ? thanks Zvi Dubitzky Email:dubi@il.ibm.com

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[libvirt-users] how to restart the network connection of kvm guest OS ?
by 何文聪 26 Mar '11

26 Mar '11

When a vm move from one VLAN(e.g. VLAN 1) to another VLAN (e.g. VLAN 2), it is needed to restart the network connection of guest OS, so that it can begin a dhcp discover and get a new ip again. But i can't find the way to restart the guest os's network connection by libvirt (neither python API nor virsh command). Is any other ways? PS: i found that the VirtualBox can detach the cable of VMs and re-attach so that the guest OS will recognize and restart a dhcp discover when the cable re-attach. I guess the KVM will have some feature like that , is anybody know something about that? thanks and looking forward to your answers.

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[libvirt-users] livemigration over specific bridge/nic?
by Christoph Raible 25 Mar '11

25 Mar '11

Hi @all, I have a question about the livemigration with libvirt / kvm. I have two bridges configured in my setup of each host. Now I want to set br1 (private network) as default NIC for live migration. Is there any solution to get this work for me? I tried to bind libvirt to those IP-Range but after that the livemigration doesn't works. If you need more details please tell me :) Regards, Christoph -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Michel Lepert Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196

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Re: [libvirt-users] libvirt unavailable while a VM is in migration?]
by Igor Serebryany 24 Mar '11

24 Mar '11

On Mon, Dec 20, 2010 at 02:14:42PM +0100, Jiri Denemark wrote: > Ouch, I wonder if that could be the reason... Just to make sure that my strange compiling/packages aren't causing the problem, I've set up two servers running fedora 14 with the official libvirt packages. i experience the same problem -- while a vm is in migration, nothing else works. my traces reveal libvirt getting stuck at the same exact spot as on my debian machines. at this point, i'm pretty sure that this is a bug in libvirt. Has libvirt ever had the ability to perform other operations while a qemu migration is in progress? If so than this is a regression, and a pretty serious one. For me, this makes live-migrations totally unusable, and since I cannot run my project without live-migrations and I cannot use any outside tools to do live-migrations when I'm using libvirt this makes libvirt totally unusable. i am desperate to get this bug fixed, and i don't think i have the resources to try to patch it myself. is there anything i can do to help you guys? more debugging info? foot massage? --Igor

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[libvirt-users] storage pool vs storage volume
by Zvi Dubitzky 23 Mar '11

23 Mar '11

Can anybody give a good reference to understand the difference between storage pool and storage volume >From what I have seem storage volume describes the physical storage media and the pool a collection of such But from the XML at libvirt I do not exactly understand that . thanks Zvi Dubitzky Email:dubi@il.ibm.com

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[libvirt-users] using more than 1 core by a virtual machine
by Zvi Dubitzky 22 Mar '11

22 Mar '11

My virtual machine xml file has <vcpu>2</vcpu> clause while the host has 2 physical cpus (cores). Is this enough to cause a VM running 2 endless loop threads to use the 2 cores ? In my case the VM running reports (cat /roc/cpuinfo) that it has 2 vcpus but it uses only 1 core (at a time) because the 'top' at the host shows 100%cpu (out of total 200%) used by the endless loop application Also virsh vcpuinfo <vm> shows only 1 CPU and 1 vcpu any idea ? thanks Zvi Dubitzky Email:dubi@il.ibm.com

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[libvirt-users] About monitoring
by kadir yüceer 22 Mar '11

22 Mar '11

Hello all, As I've been exporing libvirt api, I've seen event registerers, and types of events are defined, undefined, and you know the rest. Is it all for event types? Any ideas about how to look for a device access event, for example? Kind regards

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[libvirt-users] start/stop hooks
by Mateusz Kijowski 22 Mar '11

22 Mar '11

Hi list, I have a quick question. Is there a way to run a script on the libvirt host after a domain is started/stopped ? -- Mateusz

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[libvirt-users] error : remoteDispatchAuthPolkit:3799 : Policy kit denied action org.libvirt.unix.manage from pid 2381
by Christoph Raible 21 Mar '11

21 Mar '11

Hi @all, first my system: OS: Scientific Linux 6.0 Hypervisor: KVM + libvirt I got the following error /*error : remoteDispatchAuthPolkit:3799 : Policy kit denied action org.libvirt.unix.manage from pid 2381*/ when I want to connect with: /*virsh -c qemu:///system*/ to the hypervisor with a new added user. The user is in in kvm and qmeu group and the connection with virsh -c qemu://$hostname/system works fine. Also root login with the "login" works fine. I configured libvirt to use TLS-authetification... Did anyone of you have a solution to solve this problem. Best Regards Christoph Raible -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Michel Lepert Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196

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