- Users - libvirt List Archives

[libvirt-users] ESX VM from scratch
by Paul Apostolescu 02 Apr '15

02 Apr '15

I want to create a virtual machine from scratch in ESX but I can't figure out how to create the disks - the vmdk files. Any hints on how that can be done or even if it's possible at all ? Thanks

4 6

[libvirt-users] couple of ceph/rbd questions
by Brian Kroth 01 Apr '15

01 Apr '15

Hi, I've recently been working on setting up a set of libvirt compute nodes that will be using a ceph rbd pool for storing vm disk image files. I've got a couple of issues I've run into. First, per the standard ceph documentation examples [1], the way to add a disk is to create a block in the VM definition XML that looks something like this: <disk type='network' device='disk'> <source protocol='rbd' name='libvirt-pool/new-libvirt-image'> <host name='{monitor-host-1}' port='6789'/> <host name='{monitor-host-2}' port='6789'/> <host name='{monitor-host-3}' port='6789'/> </source> <target dev='vda' bus='virtio'/> <auth username='libvirt'> <secret type='ceph' uuid='9ec59067-fdbc-a6c0-03ff-df165c0587b8'/> </auth> </disk> The trouble with this approach is that those ceph cluster details (secret uuid and monitor host lists), need to be stored separately in every single VM disk definition separately. That makes for a lot of maintenance when those details need to change (eg: replace a monitor host (common), or change the auth details (less common)). I'd prefer to be able to define a libvirt storage pool that contains those details, and then reference the disks within each VM as volumes, so that I only need to change the ceph monitor/auth details once per libvirt compute host, rather than for every single VM disk definition. I've rebuilt my libvirt packages using --with-rbd-support so that I can successfully define a libvirt storage pool as follows: <pool type='rbd'> <name>libvirt-rbd-pool</name> <source> <name>libvirt-pool</name> <host name='{monitor-host-1}' port='6789'/> <host name='{monitor-host-2}' port='6789'/> <host name='{monitor-host-3}' port='6789'/> <auth username='libvirt' type='ceph'> <secret uuid='9ec59067-fdbc-a6c0-03ff-df165c0587b8'/> </auth> </source> </pool> However, when I go to start a VM with a volume created in that pool as follows, I get an error: <disk type='volume' device='disk'> <source pool='libvirt-rbd-pool' volume='{rbd-volume-name}'/> <driver name='qemu' type='raw' cache='writethrough'/> <target dev='vda' bus='virtio'/> </disk> "using 'rbd' pools for backing 'volume' disks isn't yet supported" When I dug through the code, it appears that there's an explicit check for RBD type storage pools (VIR_STORAGE_POOL_RBD) that disables that (libvirt-1.2.13/src/storage/storage_driver.c:3159). Is there a particular reason for that? Has it just not been implemented yet, or am I specifying the disk definition in the wrong way? Second, using the former disk definition method, I'm able to run VMs under qemu, *and* migrate them. Very slick. Nice work all. However, I found that since by default virt-manager leaves the VM defined on both the source and destination, I'm actually able to start the VM in both places. I didn't see an option to disable that, so I just wrote a simple wrapper script to do the right thing via virsh using --undefinesource, but I can't guarantee that some other admin might not skip that and just use the GUI. It appears that libvirt (or is it qemu?) doesn't set rbd locks on the disk image files by default. After running across [2], I had originally thought about writing some hooks to set and release locks on the VMs using the rbd cli, but after reading the docs on the migration process [3], I think that's probably not possible since the VM is started in both places temporarily. I think my other option is to setup some shared fs (maybe cephfs) and point virtlockd at it so that all of the libvirt compute hosts register locks on VMs properly. However, I thought I'd ask if anyone knows if there's some magic other parameter or setting I can use to have libvirt/qemu just use rbd locks natively. Or, is that not implemented either? Thanks for your help. Cheers, Brian [1] <http://ceph.com/docs/master/rbd/libvirt/#configuring-the-vm> [2] <https://www.redhat.com/archives/libvirt-users/2014-January/msg00058.html> [3] <https://libvirt.org/hooks.html#qemu_migration>

2 2

[libvirt-users] Lispvirt: porting Libvirt API for Common Lisp
by Julio Faracco 01 Apr '15

01 Apr '15

Hi everyone! I'm developing a Libvirt bindings for Common Lisp. The project is called "Lispvirt". I created this project because I was doing a project in Lisp to manage Virtual Machines. So, I needed to implement some code using C and set up Lisp to access those methods in C. This project was becoming a mess. The better scenario is using only Lisp. That's why I started to develop this bindings for Lisp. Now, I'm only using Lisp for it. For a while, I'm hosting this project on GitHub: https://github.com/jcfaracco/lispvirt But I'm planning to move it to common-lisp.net. There is still many things to do (callbacks, structures, some project decisions and planings, documentation, etc). Any contribution or suggestions would be helpful. The most important things to do now are test, test and test. Just sharing if someone is interested to help us. Thanks! *--* *Julio Cesar Faracco*

1 0

[libvirt-users] Networking issues in host
by G. Richard Bellamy 30 Mar '15

30 Mar '15

I've been having intermittent network issues on my Host - they go away when I stop and disable libvirtd and then reboot. They do not go away if I just stop libvirtd and don't reboot. I'm at a loss as to where to start with my troubleshooting, and being a relative n00b to libvirt, I'd love any pointers. Regards, Richard

2 2

[libvirt-users] No package 'libvirt' found
by Rudy YAYON 29 Mar '15

29 Mar '15

Hi, After successful libvirt compilation on Cygwin, I am trying to run virt-manage which requests LibvirtGLib: $ virt-manager Traceback (most recent call last): File "/usr/share/virt-manager/virt-manager", line 30, in <module> from gi.repository import LibvirtGLib ImportError: cannot import name LibvirtGLib I understand that I need to compile libvirt-glib. The problem is that I get the following error once running ./configure: checking whether C compiler handles -fexceptions... yes checking whether C compiler handles -fasynchronous-unwind-tables... yes checking whether C compiler handles -fipa-pure-const... yes checking whether C compiler handles -Wno-suggest-attribute=pure... yes checking whether C compiler handles -Wno-suggest-attribute=const... yes checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking for LIBVIRT... no configure: error: Package requirements (libvirt >= 0.10.2) were not met: No package 'libvirt' found Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you may set the environment variables LIBVIRT_CFLAGS and LIBVIRT_LIBS to avoid the need to call pkg-config. See the pkg-config man page for more details. The only "libraries" I have been able to find are: $ cp /usr/local/bin/cygvirt- cygvirt-0.dll cygvirt-lxc-0.dll cygvirt-qemu-0.dll Copying it to /usr/lib doesn't change anything. Renaming these files from cygvirt* to libvirt* either. Any idea? Cordialement,Rudy YAYON

1 0

Re: [libvirt-users] 答复: libvirtd can't start
by Martin Kletzander 27 Mar '15

27 Mar '15

On Thu, Mar 26, 2015 at 02:55:04PM +0800, 梅磊 wrote: >Thanks for your reply, Martin, I have read the coredump, but I am not familiar with libvirt, so could you help me to figure it out why it crash? >Attachment is the coredump gdb output and all the generate files when libvirtd stop. > I forgot to ask you to install debuginfo packages to further investigate. But looking at the log only netcf-debuginfo is needed. Could you install it and then run the "t a a bt f" again, please? From the current logs I can only guess that there is some network XML mangled and netcf can't read it. When you're power went out, as you said, is it possible you were updating something in the meantime? Try running "rpm -Va" to see if there's something broken in the system. >And Do you think this issue is the same issue with the below root cause? >https://bugzilla.redhat.com/show_bug.cgi?id=1179981 > It is not, that is caused by something else. > > > >-Best Regards, >Andy > > >-----邮件原件----- >发件人: Martin Kletzander [mailto:mkletzan@redhat.com] >发送时间: 24 March 2015 21:20 >收件人: 梅磊 >抄送: libvirt-users(a)redhat.com >主题: Re: [libvirt-users] libvirtd can't start > >On Tue, Mar 24, 2015 at 04:29:07PM +0800, 梅磊 wrote: >>Hi experts, >> The libvirtd can’t start on my server after the server interruption of >>power supply, the status is below: >> >>[root@openstack3 libvirt]# service libvirtd status Redirecting to >>/bin/systemctl status libvirtd.service libvirtd.service - >>Virtualization daemon >> Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled) >> Active: failed (Result: signal) since Tue 2015-03-24 16:10:31 CST; >>7min ago >> Process: 27372 ExecStart=/usr/sbin/libvirtd $LIBVIRTD_ARGS >>(code=killed, >>signal=SEGV) >> Main PID: 27372 (code=killed, signal=SEGV) >> >>Mar 24 16:10:31 openstack3 libvirtd[27372]: 2015-03-24 08:10:31.412+0000: >>27383: debug : virFileClose:90 : Closed fd 22 Mar 24 16:10:31 >>openstack3 libvirtd[27372]: 2015-03-24 08:10:31.412+0000: >>27383: debug : virFileClose:90 : Closed fd 22 Mar 24 16:10:31 >>openstack3 libvirtd[27372]: 2015-03-24 08:10:31.412+0000: >>27383: debug : virFileClose:90 : Closed fd 22 Mar 24 16:10:31 >>openstack3 libvirtd[27372]: 2015-03-24 08:10:31.412+0000: >>27383: debug : virFileClose:90 : Closed fd 22 Mar 24 16:10:31 >>openstack3 libvirtd[27372]: 2015-03-24 08:10:31.413+0000: >>27383: debug : virFileClose:90 : Closed fd 22 Mar 24 16:10:31 >>openstack3 libvirtd[27372]: 2015-03-24 08:10:31.413+0000: >>27383: debug : virStateInitialize:847 : Running global init for netcf >>state driver Mar 24 16:10:31 openstack3 libvirtd[27372]: 2015-03-24 >>08:10:31.413+0000: >>27383: debug : virObjectNew:199 : OBJECT_NEW: obj=0x7f73f0080d00 >>classname=virNetcfDriverState Mar 24 16:10:31 openstack3 >>libvirtd[27372]: ====== end of log ===== Mar 24 16:10:31 openstack3 >>systemd[1]: libvirtd.service: main process exited, code=killed, >>status=11/SEGV Mar 24 16:10:31 openstack3 systemd[1]: Unit >>libvirtd.service entered failed state. >> >>And the attachment is the log after restart the libvirtd. >> >>After long time search on google, I didn’t get any useful information, >>so anyone can give me some hint on this issue? >> > >What did you search for? > >According to the log: >abrt-hook-ccpp: Saved core dump of pid 28928 (/usr/sbin/libvirtd) to >/var/tmp/abrt/ccpp-2015-03-24-16:19:22-28928 (97218560 bytes) > >libvirtd has segfaulted and you have the coredump. Use gdb to open >it: ># gdb -c /var/tmp/abrt/ccpp-2015-03-24-16:19:22-28928 > >and then look at what happened, if you can't make anything of it, post it as an attachment here or create a bug from it: > >(gdb) bt >(gdb) t a a bt full > >>-BR, >>Andy >> > > >>_______________________________________________ >>libvirt-users mailing list >>libvirt-users(a)redhat.com >>https://www.redhat.com/mailman/listinfo/libvirt-users

3 4

[libvirt-users] Channel Device virConnectListAllNodeDevices
by Neel Basu 27 Mar '15

27 Mar '15

Hello, I've added a Channel Device through virt-manager GUI. virsh dumpxml shows the device as. <channel type='unix'> <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/ubuntusaucy.marx'/> <target type='virtio' name='marx'/> <alias name='channel2'/> <address type='virtio-serial' controller='0' bus='0' port='3'/> </channel> I am expecting virConnectListAllNodeDevices to have the device in its output. But I don't see it there. Is it the right function to call ? virNodeDevicePtr* devices; int dev_count = virConnectListAllNodeDevices(conn, &devices, 0); std::cout << "Devices: " << dev_count << std::endl; for(virNodeDevicePtr* device = devices; device < devices+dev_count; ++device){ std::cout << virNodeDeviceGetName(*device) << std::endl; } returns 66 devices but once I loop through devices I don't get any corresponding name for the channel device. Tried using virConnectListAllNodeDevices(conn, &devices, VIR_CONNECT_LIST_NODE_DEVICES_CAP_VPORTS); returns 0 devices. Thanks.

1 1

[libvirt-users] Installation of libvirt on Ubuntu
by WANG Cheng D 27 Mar '15

27 Mar '15

Dear all, I wonder if libvirt can work on Ubuntu. As you know, it is very convenient to install libvirt on Fedora. I can download the libvirt packet from libvirt.org and install it using command ./configure, make and make install. As I am going to install an open source simulation system named openairinterface, Ubuntu is the recommended OS, and I want to install the simulation system in libvirt lxc. (as you may know, there is another lxc user space tool on Ubuntu whose official website is "https://linuxcontainers.org", which I don't want to use). My questions are: 1) Can I install libvirt on Ubuntu with the same installation steps as on Fedora (i.e., manually download the tar.gz packet and install it locally)? I found a link talking about installation libvirt on Ubuntu which installs something like "libvirt-bin" (https://help.ubuntu.com/lts/serverguide/libvirt.html) I am not sure if libvirt can be installed following this instruction? 2) How can I create the rootfs for a Ubuntu container if libvirt can be installed on Ubuntu? I create the rootfs for Fedora container using: # yum --installroot=/root/fedora16linux container --releasever=19 install -y openssh, bridge-utils". How can I achieve this on Ubuntu? 3) If libvirt can work on Ubuntu, Can a disk file on the host OS be exposed to a Ubuntu container just like on Fedora? With my warmest regards, Cheng Wang

2 2

Re: [libvirt-users] pty pairing host - guest
by Neel Basu 27 Mar '15

27 Mar '15

Getting no output on /dev/hvcNN On Thu, Mar 19, 2015 at 3:15 PM, Daniel P. Berrange <berrange(a)redhat.com> wrote: > On Thu, Mar 19, 2015 at 01:29:37PM +0530, Neel Basu wrote: > > HI!, > > > > I am using virt-manager GUI. There I can add a `Console Device` through > > Add Hardware. I can add a virtio pty WITHOUT restarting the VM. also I > get > > a pty allocated to host machine say `/dev/pty/M` > > > > My expectation is this `host:/dev/pty/M` is connected with a > > `guest:/dev/ttyN`. so If I open minicom or screen and write to > > `host:/dev/pty/M` it will be propagated to 'guest:/dev/ttyN'. Is my > > expectation correct ? > > > > If it is correct how will I know what is the guest tty allocated against > > this host pty ? > > No, that's not how it works. The <console> devices are exposed to > the guest as /dev/hvcNN devices. Starting with NN==0 > > as per the dumpxml output <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> I expected host:/dev/pts/1 is paired with guest:/dev/hvc0 So I tried to communicate with minicom,echo,cat with these two but I saw no output. what I echo on /dev/pts/1 doesn't pass to /dev/hvc0 or vice verse. > > > Similar to console device I can add a Serial device but that requires a > > reboot of the guest VM. However I tried that though I prefer to do it > > without a guest restart. > > > > <serial type='pty'> > > <source path='/dev/pts/1'/> > > <target port='0'/> > > <alias name='serial0'/> > > </serial> > > > > here also I expected host:/dev/pts/1 is paired with /dev/ttyS0 but > couldn't > > communicate. > > The serial port device supported is a 1990 era ISA bus serial port > so there's no hotplug for that. Only the paravirt consoles can be > hotplugged. > > Regards, > Daniel > -- > |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ > :| > |: http://libvirt.org -o- http://virt-manager.org > :| > |: http://autobuild.org -o- http://search.cpan.org/~danberr/ > :| > |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc > :| >

1 0

[libvirt-users] virConnectListAllNodeDevices requires number of devices to be known
by Neel Basu 27 Mar '15

27 Mar '15

Hi, virConnectListAllNodeDevices() takes a virNodeDevicePtr **devices. So I need to create an array of virNodeDevicePtr. For that I need to know size / Number of devices. What is the function for that ? Thank You.

2 1