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[libvirt-users] Default lib/include dirs location in OS X
by Radek Simko 05 Sep '14

05 Sep '14

Hi, I have installed libvirt via Homebrew = compiled from source <https://github.com/Homebrew/homebrew/blob/master/Library/Formula/libvirt.rb> . Then I wanted to install *ruby-libvirt* gem install ruby-libvirt and end up with this error: /usr/local/Cellar/ruby/2.1.2_3/bin/ruby extconf.rb *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/local/Cellar/ruby/2.1.2_3/bin/ruby --with-libvirt-include --without-libvirt-include --with-libvirt-lib --without-libvirt-lib --with-libvirt-config --without-libvirt-config --with-pkg-config --without-pkg-config extconf.rb:73:in `<main>': libvirt library not found in default locations (RuntimeError) extconf failed, exit code 1 so then I passed the locations of *include* & *lib* directories as the configuration options: gem install ruby-libvirt -- --with-libvirt-include=/usr/local/Cellar/libvirt/1.2.7/include --with-libvirt-lib=/usr/local/Cellar/libvirt/1.2.7/lib which *worked*, but it's not very clean and effective solution, especially if you have *ruby-libvirt* as a requirement in your Gemfile and you need to install it via Bundler. I reckon that a possible solution would be to change Homebrew formula, so that it either installs or symlinks both dirs into locations where *ruby-libvirt* will look for it, but *what's the default location actually*? -- *Radek Simko*

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[libvirt-users] Unable to find security driver for label selinux
by Qiang Guan 05 Sep '14

05 Sep '14

Hi experts, I want to have a test on security driver for libvirt lxc on my debian system. What I do is as the following steps: 1) download the source code from git://libvirt.org/libvirt.git 2) compile and install with the source code as following: ./autogen.sh --system ./configure --with-selinux=yes --with-secdriver-selinux=yes make -j8 & make install root@debian:~/github/libvirt.git/tools# ./virsh --version=long Virsh command line tool of libvirt 1.2.8 See web site at http://libvirt.org/ Compiled with support for: Hypervisors: QEMU/KVM LXC UML OpenVZ VMWare VirtualBox Test Networking: Remote Network Bridging Interface udev Nwfilter VirtualPort Storage: Dir Filesystem SCSI Multipath LVM Miscellaneous: Daemon Nodedev SELinux Secrets Debug Modular 3) then I define a lxc vm with the seclabel : root@debian:~/images# vir dumpxml lxc <domain type='lxc'> <name>lxc</name> <uuid>b1b787a1-d20e-48bd-938b-16ba61d22405</uuid> <memory unit='KiB'>419404</memory> <currentMemory unit='KiB'>419404</currentMemory> <vcpu placement='static'>1</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> <cmdline>console=tty0 console=ttyS0</cmdline> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/local/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/tmp/rootfs'/> <target dir='/'/> </filesystem> <console type='pty'> <target type='lxc' port='0'/> </console> </devices> <seclabel type='dynamic' relabel='yes'/> </domain 4) When I start the vm, It output an error: root@debian:~/images# vir start lxc error: Failed to start domain lxc error: unsupported configuration: Unable to find security driver for label selinux What's the problem? Really appreciate for any help. -- ------------ Jackie Best Regards

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[libvirt-users] virtio-serial port that listens tcp socket on host
by Vasiliy Tolstov 05 Sep '14

05 Sep '14

Hello. Is that possible to create virtio-serial port that on host listens tcp socket and how to avoid duplicate listened ports in case of migration? -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

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[libvirt-users] Fwd: Does virsh actually work?
by Gary Hook 04 Sep '14

04 Sep '14

On Wed, Sep 3, 2014 at 2:12 PM, Eric Blake <eblake(a)redhat.com> wrote: > On 09/03/2014 01:05 PM, Gary Hook wrote: > > > > > root@huey:/tmp# virsh migrate --live --p2p > > This command does not default to migrating storage,... > Oh, you mean like this? root@huey:/tmp# virsh migrate --live --p2p --copy-storage-all e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f qemu+ssh://10.10.11.204/system --verbose error: Failed to open file '/mnt/store01/virt/e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2': No such file or directory Apologies; I should have used this one in the first place. Too many attempts in the command history.... I'm guessing I"m still missing something... > > > > (huey is 10.10.11.203, dewey is 10.10.11.204; DNS works, but I thought to > > eliminate that as a source of this problem.) As can be seen, the .qcow2 > > files exists on the source system, and does not exist on the target > system. > > ...therefore, this error message is expected if the storage is not > already present on the destination. > > Migration requires either that you have shared storage (both source and > destination can see THE SAME FILE, and if one side sees the file via > NFS, then both sides must see the file via NFS [you can't mix local and > NFS]). OR, you have to tell migration that you want to migrate storage > as well as machine state, by adding the --copy-storage-all flag to your > command line. > Understood; perfectly sensible. See above. > http://libvirt.org/migration.html should document useful information > such as this; would you like to submit a patch to help improve that web > page? The sources are in libvirt.git under docs/migration.html.in. > Yep, read that page (several times). At such point I have anything of substance to add, absolutely, yes, I very much want to contribute. I am just starting out building my skills on KVM and libvirt (background is with PHYP on Power) but fully intend to become conversant with the packages.

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[libvirt-users] Fwd: Does virsh actually work?
by Gary Hook 04 Sep '14

04 Sep '14

On Wed, Sep 3, 2014 at 2:12 PM, Brian Rak <brak(a)gameservers.com> wrote: > Try creating a blank file on the target system at > /mnt/store01/virt/e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2 on 'dewey'. > Yes, tried that before posting. At least, with a simple "touch" command. > Migrations really don't go well when the target disk doesn't exist. I'm > not certain why this is, I think the migration feature was mainly built > with shared storage in mind. > I appreciate that, but unless it's a documented and designed restriction, it seems it oughta work. And I know for a fact that it does (details which I will not include here). Thank you for your time; much appreciated. > On 9/3/2014 3:05 PM, Gary Hook wrote: > > I have been beating my head against a wall attempting to get virsh to > migrate a simple VM from one host to another. > > I have two systems running Ubuntu 14.04 with libvirt 1.2.2. Yes, they > are bridged. Non-shared storage. Modest guest VM that only requires 100G of > disk space; there is far more available. > > In trying to accomplish even the simplest migration (per every page I > can find from both the Fedore Project and Red Hat) I consistently get the > following results: > > root@huey:/tmp# virsh list --all > Id Name State > ---------------------------------------------------- > 9 e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f running > - 81c50b5a-24ef-47d5-88ae-16ee7f4f9537 shut off > - acd06610-c919-450b-97c8-8e49b9a0d45c shut off > > root@huey:/tmp# virsh migrate --live --p2p > e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f qemu+ssh://10.10.11.204/system > error: Failed to open file > '/mnt/store01/virt/e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2': No such > file or directory > > root@huey:/tmp# ls -al /mnt/store01/virt > total 9140768 > drwxr-xr-x 2 libvirt-qemu kvm 4096 Sep 3 10:17 . > drwxr-xr-x 13 root root 4096 Aug 28 10:39 .. > -rw-r--r-- 1 libvirt-qemu kvm 3271688192 Aug 29 14:39 > 81c50b5a-24ef-47d5-88ae-16ee7f4f9537.qcow2 > -rw-r--r-- 1 libvirt-qemu kvm 2523136000 Aug 29 14:47 > acd06610-c919-450b-97c8-8e49b9a0d45c.qcow2 > -rw-r--r-- 1 libvirt-qemu kvm 3565486080 Sep 3 13:52 > e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2 > > root@dewey:~ >ls -al /mnt/store01/virt > total 8 > drwxrwxrwx 2 libvirt-qemu kvm 4096 Sep 3 12:30 . > drwxr-xr-x 13 root root 4096 Aug 29 16:36 .. > root@dewey:~ > > > (huey is 10.10.11.203, dewey is 10.10.11.204; DNS works, but I thought > to eliminate that as a source of this problem.) As can be seen, the .qcow2 > files exists on the source system, and does not exist on the target system. > The directory shown is where images are to be stored. There is no problem > starting and stopping VMs on the systems. It is not at all clear where the > failure is occurring; there is no documentation that discusses this > failure, of course. > > I believe that I am invoking a basic migration per every page I can find > in a web search. Please correct any errors. > > I am working as root on both systems, and use ssh to get from one system > to another, no passwords, no authentication required. All works well. > > Any observations, or suggestions as to what configuration parameters I > should check, would be greatly appreciated. > > Thank you. > > Gary > >

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[libvirt-users] Does virsh actually work?
by Gary Hook 04 Sep '14

04 Sep '14

I have been beating my head against a wall attempting to get virsh to migrate a simple VM from one host to another. I have two systems running Ubuntu 14.04 with libvirt 1.2.2. Yes, they are bridged. Non-shared storage. Modest guest VM that only requires 100G of disk space; there is far more available. In trying to accomplish even the simplest migration (per every page I can find from both the Fedore Project and Red Hat) I consistently get the following results: root@huey:/tmp# virsh list --all Id Name State ---------------------------------------------------- 9 e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f running - 81c50b5a-24ef-47d5-88ae-16ee7f4f9537 shut off - acd06610-c919-450b-97c8-8e49b9a0d45c shut off root@huey:/tmp# virsh migrate --live --p2p e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f qemu+ssh://10.10.11.204/system error: Failed to open file '/mnt/store01/virt/e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2': No such file or directory root@huey:/tmp# ls -al /mnt/store01/virt total 9140768 drwxr-xr-x 2 libvirt-qemu kvm 4096 Sep 3 10:17 . drwxr-xr-x 13 root root 4096 Aug 28 10:39 .. -rw-r--r-- 1 libvirt-qemu kvm 3271688192 Aug 29 14:39 81c50b5a-24ef-47d5-88ae-16ee7f4f9537.qcow2 -rw-r--r-- 1 libvirt-qemu kvm 2523136000 Aug 29 14:47 acd06610-c919-450b-97c8-8e49b9a0d45c.qcow2 -rw-r--r-- 1 libvirt-qemu kvm 3565486080 Sep 3 13:52 e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2 root@dewey:~ >ls -al /mnt/store01/virt total 8 drwxrwxrwx 2 libvirt-qemu kvm 4096 Sep 3 12:30 . drwxr-xr-x 13 root root 4096 Aug 29 16:36 .. root@dewey:~ > (huey is 10.10.11.203, dewey is 10.10.11.204; DNS works, but I thought to eliminate that as a source of this problem.) As can be seen, the .qcow2 files exists on the source system, and does not exist on the target system. The directory shown is where images are to be stored. There is no problem starting and stopping VMs on the systems. It is not at all clear where the failure is occurring; there is no documentation that discusses this failure, of course. I believe that I am invoking a basic migration per every page I can find in a web search. Please correct any errors. I am working as root on both systems, and use ssh to get from one system to another, no passwords, no authentication required. All works well. Any observations, or suggestions as to what configuration parameters I should check, would be greatly appreciated. Thank you. Gary

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[libvirt-users] How to have a directory and its subdirectories as a storage pool
by Marc Haber 04 Sep '14

04 Sep '14

Hi, I would like to use btrfs subvolumes as storage place for VM images to use snapshots. Unfortunately, this does not seem to work in virt-manager at least since the "filesystem directory" storage pool type does not allow me to descend into subdirectories. Is there a trick to do this? Can I do it with virsh, or in the XML? Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402 Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600420

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[libvirt-users] Network reconfiguration glitch after migration
by Joaquim Barrera 03 Sep '14

03 Sep '14

Hello everyone, I have the following scenario: * 2 host machines (H1 and H2) running VMs. I execute migrations (QEMU) from one host to the other, and so on. The migrations are done in a dedicated LAN (eth1 in both hosts) while regular department LAN runs on eth0 * 1 computer (my desktop computer) also connected to this common LAN on eth0. The VMs have a Python script sending UDP packets to my desktop computer (which has the server part of the Python script), every 250 ms, to be able to mesure downtime and other stuff. Once I run a live migration from H1 to H2, I would expect the downtime to be in the order of ms, or maybe a few seconds, but it takes something like 10 to 20 seconds on average for the packets to resume arriving at my computer. One could think about the network reconfiguration delay, or other reasons, but here comes the tricky part: If I have a ping running on the destination host to the internal IP that the VM is supposed to have once the migration is done, the UDP packets resume just a few ms after the migration os done. Is like: if the VM only has outgoing connections, it takes a lot of time to resume its operation, but if it has some incoming connection, the network resumes very quick. I know it may sound wierd, but maybe there is a clear reason for this issue. Any ideas? Thank you!

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[libvirt-users] libvirt ignores ip setting when creating a xen domU?
by Kim Larry 02 Sep '14

02 Sep '14

Hi, I'm currently writing a script to avoid ip conflict but I couldn't get ip address from xenstore when I create a guest using libvirt with libxl connector. With 'xl create' command, it works everything fine, but not with libvirt. So I dug into the source code, I couldn't find any code for declaring x_nic->ip field in libxlMakeNic(). Or I just created XML file the wrong way? Here is a part of domain XML: <interface type="bridge"> <mac address="00:16:3e:51:6b:19" /> <protocol family="ipv4"> <ip address="10.0.1.119" prefix="24" /> <route gateway="10.0.1.1"/> </protocol> <source bridge="virbr0" /> </interface> Hope someone can help me out. - Larry

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[libvirt-users] How can I get the pid mapping relationship between the container and the native OS
by WANG Cheng D 01 Sep '14

01 Sep '14

Dear all, I want to dynamically change the CPU affinity of multiple processes/threads started in a container. Changing affinity operation is done in native OS. My problem is how to obtain the mapping relationship between the two pids owned by the process/thread. As you know, one pid is given by the container, which is different from the corresponding pid seen by the native OS. Thank you in advance. Cheng

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