July 2013 - Users - libvirt List Archives

[libvirt-users] some problem with snapshot by libvirt
by xingxing gao 22 Nov '14

22 Nov '14

Hi,all,i am using libvirt to manage my vm,in these days i am testing the libvirt snapshot ,but meet some problem: the snapshot was created from this command: snapshot-create-as win7 --disk-only --diskspec vda,snapshot=external --diskspec hda,snapshot=no but when i tried to revert from the snapshot which created from the above command ,i got error below: virsh # snapshot-revert win7 1338041515 --force error: unsupported configuration: revert to external disk snapshot not supported yet version: virsh # version Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 1.0.93

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[libvirt-users] How to insert vcpupin in guest xml file
by Peeyush Gupta 09 Sep '13

09 Sep '13

Hi all, I am trying to add vcpupin in the guest xml file. I am working with openstack and the code I have is python bound. I investigated through the code and found that the elemets in xml file are set in get_guest_config function. Now the thing is I am not able to set vcpupin element. I mean I tried guest.cputune_vcpupin but it's not working. Help me out, please! Thanks. ~Peeyush Gupta

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[libvirt-users] Modify Iptables Rules (virbr0 & virbr1)
by Jorge Fábregas 13 Aug '13

13 Aug '13

Hi, I have some guests running in the "default" network (virbr0) and I've also created a similar (NAT) network (virbr1). Therefore, the FORWARD chain for the CentOS 6.4 host looks like this: http://fpaste.org/29229/75281379/ ...where line 3-7 are related to virbr0 and 8-12 to virbr1. My 2 questions: 1) I've noticed that I can ping from a guest within virbr0 to any guest on the virbr1 network. However, I can't do the same from virbr1 (ping guests on virbr0). This is because of "line 6" on the pastebin, where the traffic is REJECTED. I originally thought that If I create multiple NAT networks (just like the default virbr0) they would be able to talk to each other (the host doing the actual forwarding) but as you can see, based on the iptables rules that libvirt injects, this only happens for the first network. That is, the first network can reach all other networks (just because it happens to be the first one defined). Is this the intention (only default can talk to the others but not the other way around)? 2) I would like both networks to talk to each other. If I remove line #6 I can make virbr1 guests talk to virbr0 guests. What is the correct way to handle this? I obviously don't want to perform "iptables -D FORWARD line-number..." every time I start libvirt. (I really like to leave the networks as they are, NAT, dhcp running etc). Thanks! Jorge

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[libvirt-users] Getting nwfilter to work on Debian Wheezy
by Sven Schwedas 06 Aug '13

06 Aug '13

Hi, I'm trying to configure nwfilter for KVM, but so far I haven't managed to figure out a working configuration. Network setup: The dom0 (Debian 7.1, kernel 3.2.46-1, libvirt 0.9.12) is connected via eth0, part of the external subnet 192.168.17.0/24, and has an additional subnet 192.168.128.160/28 routed to its main address 192.168.17.125. The host's subnet is configured as bridge in virsh: > <network> > <name>foo</name> > <forward dev='eth0' mode='route'> > <interface dev='eth0'/> > </forward> > <bridge name='foo-br0' stp='off' delay='0' /> > <ip address='192.168.128.161' netmask='255.255.255.240'> > </ip> > </network> The domU is configured to use this bridge (static IP configured in DomU): > <interface type='network'> > <source network='foo'/> > <target dev='vnet0'/> > <model type='virtio'/> > <filterref filter='test-eth0'> > <parameter name='CTRL_IP_LEARNING' value='none'/> > <parameter name='IP' value='192.168.128.162'/> > </filterref> > <alias name='net0'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> > </interface> With an empty filter, connectivity is working fine. Now, if I add the example ruleset suggested in the documentation ( http://libvirt.org/formatnwfilter.html#nwfwriteexample ), *incoming* ICMP works (but not outgoing), and inbound SSH traffic is blocked, together with outbound DNS. The linked rules produce the following iptables chains: > Chain INPUT (policy ACCEPT) > target prot opt source destination > libvirt-host-in all -- 0.0.0.0/0 0.0.0.0/0 > ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:53 > ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:53 > ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:67 > ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:67 > > Chain FORWARD (policy ACCEPT) > target prot opt source destination > libvirt-in all -- 0.0.0.0/0 0.0.0.0/0 > libvirt-out all -- 0.0.0.0/0 0.0.0.0/0 > libvirt-in-post all -- 0.0.0.0/0 0.0.0.0/0 > ACCEPT all -- 0.0.0.0/0 192.168.128.160/28 > ACCEPT all -- 192.168.128.160/28 0.0.0.0/0 > ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 > REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable > REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable > > Chain OUTPUT (policy ACCEPT) > target prot opt source destination > > Chain FI-vnet0 (1 references) > target prot opt source destination > RETURN tcp -- 0.0.0.0/0 0.0.0.0/0 tcp spt:22 state ESTABLISHED ctdir ORIGINAL > RETURN tcp -- 0.0.0.0/0 0.0.0.0/0 tcp spt:80 state ESTABLISHED ctdir ORIGINAL > RETURN icmp -- 0.0.0.0/0 0.0.0.0/0 state NEW,ESTABLISHED ctdir REPLY > RETURN udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:53 state NEW,ESTABLISHED ctdir REPLY > DROP all -- 0.0.0.0/0 0.0.0.0/0 > > Chain FO-vnet0 (1 references) > target prot opt source destination > ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 state NEW,ESTABLISHED ctdir REPLY > ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 state NEW,ESTABLISHED ctdir REPLY > ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED ctdir ORIGINAL > ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp spt:53 state ESTABLISHED ctdir ORIGINAL > DROP all -- 0.0.0.0/0 0.0.0.0/0 > > Chain HI-vnet0 (1 references) > target prot opt source destination > RETURN tcp -- 0.0.0.0/0 0.0.0.0/0 tcp spt:22 state ESTABLISHED ctdir ORIGINAL > RETURN tcp -- 0.0.0.0/0 0.0.0.0/0 tcp spt:80 state ESTABLISHED ctdir ORIGINAL > RETURN icmp -- 0.0.0.0/0 0.0.0.0/0 state NEW,ESTABLISHED ctdir REPLY > RETURN udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:53 state NEW,ESTABLISHED ctdir REPLY > DROP all -- 0.0.0.0/0 0.0.0.0/0 > > Chain libvirt-host-in (1 references) > target prot opt source destination > HI-vnet0 all -- 0.0.0.0/0 0.0.0.0/0 [goto] PHYSDEV match --physdev-in vnet0 > > Chain libvirt-in (1 references) > target prot opt source destination > FI-vnet0 all -- 0.0.0.0/0 0.0.0.0/0 [goto] PHYSDEV match --physdev-in vnet0 > > Chain libvirt-in-post (1 references) > target prot opt source destination > ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 PHYSDEV match --physdev-in vnet0 > > Chain libvirt-out (1 references) > target prot opt source destination > FO-vnet0 all -- 0.0.0.0/0 0.0.0.0/0 [goto] PHYSDEV match --physdev-out vnet0 I've tried fidgeting with the configuration (direction inout instead of in/out, etc.), but I didn't find a setup that works as intended. What am I missing? -- Mit freundlichen Grüßen, / Best Regards, Sven SCHWEDAS Systemadministrator TAO Beratungs- und Management GmbH | Lendplatz 45 | A - 8020 Graz Mail/XMPP: sven.schwedas(a)tao.at | +43 (0)680 301 7167 http://software.tao.at

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[libvirt-users] Installing libvirt
by Peeyush Gupta 03 Aug '13

03 Aug '13

Hi, I am trying to install new libvirt version on Ubuntu 12.04 LTS. Now I downloaded libvirt 1.0.5 from libvirt.org/sources then I issued three commands: ./autogen.sh make make install This installs the libvirt on my system. But there are some issues, I have to run libvirtd explicitly everytime I reboot my system. And whenever I try to run virt-manager from terminal, it says "No D-Bus daemon running". But when I do "sudo virt-manager", it runs fine. Any idea what am I doing wrong? Thanks. ~Peeyush Gupta

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[libvirt-users] start lxc container on fedora 19
by Aarti Sawant 02 Aug '13

02 Aug '13

hello, i am new to lxc, i have created a lxc container on fedora 19 i created a container rootfs of fedora 19 by using yum --installroot=/containers/test1 --releasever=19 install openssh test1.xml file for container test1 <domain type="lxc"> <name>test1</name> <vcpu placement="static">1</vcpu> <cputune> <shares>1024</shares> <period>1000000</period> </cputune> <memtune> <hard_limit unit="M">1024</hard_limit> <soft_limit unit="M">128</soft_limit> <min_guarantee unit="M">64</min_guarantee> </memtune> <blkiotune> <weight>800</weight> </blkiotune> <memory unit="KiB">102400</memory> <os> <type>exe</type> <init>/bin/bash</init> </os> <clock offset="utc"/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/"/> <target dir="/"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/var"/> <target dir="/var"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/dev"/> <target dir="/dev"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/root"/> <target dir="/root"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/home"/> <target dir="/home"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/opt"/> <target dir="/opt"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/media"/> <target dir="/media"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/bin"/> <target dir="/bin"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/lib64"/> <target dir="/lib64"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/etc"/> <target dir="/etc"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/lib"/> <target dir="/lib"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/run"/> <target dir="/run"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/srv"/> <target dir="/srv"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/sys"/> <target dir="/sys"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/tmp"/> <target dir="/tmp"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/boot"/> <target dir="/boot"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/usr"/> <target dir="/usr"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/mnt"/> <target dir="/mnt"/> </filesystem> <filesystem accessmode="passthrough" type="mount"> <source dir="/containers/test1/sbin"/> <target dir="/sbin"/> </filesystem> <interface type="bridge"> <source bridge="br0"/> </interface> <console port="0" type="pty"/> </devices> </domain> the host network files: /etc/sysconfig/network-script/ifcfg-br0 DEVICE="br0" TYPE="Bridge" USERCTL="no" BOOTPROTO="dhcp" ONBOOT="yes" NM_CONTROLLED="no" /etc/sysconfig/network-script/ifcfg-p2p1 DEVICE="p2p1" BOOTPROTO="dhcp" BRIDGE="br0" NM_CONTROLLED="no" ONBOOT="yes" TYPE="Ethernet" the fstab of host # # /etc/fstab # Created by anaconda on Fri Jul 26 05:26:08 2013 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # UUID=b49ce5dc-afb7-4c8e-9487-c1ed101d9166 / ext4 defaults 1 1 UUID=3dfa07fd-a06b-4a1a-a3fd-4e2f5e0d0e6a /boot ext4 defaults 1 2 UUID=3d1cb255-721a-48d2-b2e9-86f52b5fbec6 swap swap defaults 0 0 none /sys/fs/cgroup cgroup defaults 0 0 when i try to start the container using virsh i get error virsh --connect lxc:// virsh # define /containers/test1/test1.xml Domain test1 defined from /containers/test1/test1.xml virsh # start test1 error: Failed to start domain test1 error: internal error guest failed to start: PATH=/bin:/sbin TERM=linux container=lxc-libvirt container_uuid=05a7239d-f610-4ae9-ad47-4bf47f2f9b54 LIBVIRT_LXC_UUID=05a7239d-f610-4ae9-ad47-4bf47f2f9b54 LIBVIRT_LXC_NAME=test1 /bin/lxc_defaultinit.sh Unable to send container continue message: Broken pipe has anyone face the same problem with fedora 19. can anyone guide me.. Thanks, Aarti Sawant

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[libvirt-users] Quick questions on virtio-serial transport
by Hari Pyla 01 Aug '13

01 Aug '13

Hi, I am using the virtio-serial transport for communication between the host and the guest. I've created the channel using virt-install: virt-install --name=centos --import --disk /var/lib/libvirt/images/centos.img,size=15 \ --ram 2048 \ --vcpus=2 \ --arch=x86_64 --os-type linux --network=bridge:br1 --graphics vnc \ --noautoconsole \ --channel pty,target_type=virtio,name=guest1 This correctly creates a file "/dev/virtio-ports/guest1" in the guest for the guest to communicate with the host. So the guest side of things are good. Now on the host side, I see a two files being created in /dev/pts directory. $ ls -alt /dev/pts crw--w---- 1 qemu tty 136, 1 Jul 31 15:49 1 crw--w---- 1 qemu tty 136, 2 Jul 31 15:49 2 So here are my questions: i) I was wondering if there is anyway of knowing which of these files correspond to the other end of the channel without having to manually echoing data to each of these files and see which of the data shows up on the guest side. ii) I was also wondering if there is anyway of identifying the host side endpoint i.e., /dev/pts/FILE of the channel programatically iii) Better yet can the /dev/pts/FILE be explicitly passed as an argument while creating a channel in the guest so the host knows that it is supposed to use the /dev/pts/FILE if it wants to talk to the guest. I read a prior post on this mailing list: https://www.redhat.com/archives/libvir-list/2012-May/msg00964.html It mentions that from the host side one could dump the xml of the guest and identify the "source path" of the channel, something in the lines of <channel type='pty'> <source path='/dev/pts/12'/> <target type='virtio' name='arbitrary.virtio.serial.port.name'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='2'/> </channel> but I do not find the source path in the XML description of the guest I've created. This is what I see in the XML file. <channel type='pty'> <target type='virtio' name='guest1'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> I was wondering if I am missing something. Any help is greatly appreciated. Thanks, --Hari

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[libvirt-users] filesystem accessmode='passthrough'
by Yury Goltsov 31 Jul '13

31 Jul '13

Hello. I am trying to 'passthrough' the part of host filesystem to kvm guest. libvirt xml: <filesystem type='mount' accessmode='passthrough'> <source dir='/var/guests/mail-var'/> <target dir='mail-var'/> </filesystem> kvm is started from root. After mounting in guest mount -t 9p mail-var /mnt -o trans=virtio,version=9p2000.L or mount -t 9p www-var /mnt -o trans=virtio if I try to make file or directory in guest, I have problem with permissions: ruser@www:~# ls -ld /mnt/ruser/ drwxr-xr-x 2 ruser www-data 4096 May 28 13:13 /mnt/ruser/ ruser@www:~# ls -ld /mnt/tmp/ drwxrwxrwx 2 root root 4096 Jul 26 09:01 /mnt/tmp/ root@www:~# touch /mnt/tmp/file1 OK: root@www:~# touch /mnt/ruser/file2 touch: cannot touch `/mnt/ruser/file2': Permission denied root@www:~# su ruser ruser@www:~$ touch /mnt/ruser/file3 touch: cannot touch `/mnt/ruser/file3': Permission denied ruser@www:~$ touch /mnt/tmp/file4 touch: setting times of `/mnt/tmp/file4': No such file or directory I have read in documentation, that in "passthrough" security model, files are stored using the same credentials as they are created on the guest (like NFS3). Suggest me, please, what is it: I do something wrong, or I must update qemu-kvm or/and libvirt to recent version, or I need to find other solution for sharing host filesystem? Thanks. Yury in host: root@host:~# libvirtd --version libvirtd (libvirt) 0.9.12 root@host:~# kvm --version QEMU emulator version 1.1.2 (qemu-kvm-1.1.2+dfsg-6, Debian), Copyright (c) 2003-2008 Fabrice Bellard root@host:~# uname -a Linux host 3.2.0-4-amd64 #1 SMP Debian 3.2.46-1 x86_64 GNU/Linux root@host:~$ cat /etc/os-release PRETTY_NAME="Debian GNU/Linux 7 (wheezy)"

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[libvirt-users] Fail to destroy lxc container: internal error Some container PIDs refused to die
by hzguanqiang 31 Jul '13

31 Jul '13

Hey guys, When I destroy a lxc container, It reported an error with details as following: root@debian:~$ vir destroy 901eef81-06b2-4252-aeef-53b87c402585 error: Failed to destroy domain 901eef81-06b2-4252-aeef-53b87c402585 error: internal error Some container PIDs refused to die root@debian:~$ vir version Compiled against library: libvirt 1.1.0 Using library: libvirt 1.1.0 Using API: LXC 1.1.0 Running hypervisor: LXC 3.2.46 What's the problem? How could I destroy the lxc just like this? Thanks. -------------- Best regards! GuanQiang 2013-07-31

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Re: [libvirt-users] Installing libvirt
by Peeyush Gupta 31 Jul '13

31 Jul '13

Hi, I am not sure what exactly "libvirt-related packages" mean. But I didn't have anything else on my system. I mean, I launch a VM (with Ubuntu 12.04) and the first thing I installed is libvirt only. Thanks. ~Peeyush Gupta

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[libvirt-users] lxc-enter-namespace error: security model cannot be entered.
by hzguanqiang 30 Jul '13

30 Jul '13

Hi Guys, I started a lxc container with libvit in ubuntu Operating system, and succeed using lxc-enter-namespace to enter the namespaces and security context of the container. But when I do the same thing in debian OS, It reported an error, with details as following: root@debian:/etc# vir list Id Name State ---------------------------------------------------- 4424 instance-00000007 running 25913 instance-00000008 running root@debian:/etc# vir dumpxml 4424 <domain type='lxc' id='4424'> <name>instance-00000007</name> <uuid>f1ce5360-bb5e-4cfc-b5ef-d05f8db52618</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>3</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/lib/libvirt/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/opt/stack/data/nova/instances/f1ce5360-bb5e-4cfc-b5ef-d05f8db52618/rootfs'/> <target dir='/'/> </filesystem> <interface type='bridge'> <mac address='fa:16:3e:3a:c6:11'/> <source bridge='br100'/> <target dev='veth0'/> <filterref filter='nova-instance-instance-00000007-fa163e3ac611'/> </interface> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='lxc' port='0'/> <alias name='console0'/> </console> </devices> <seclabel type='none'/> </domain> root@debian:/etc# vir lxc-enter-namespace 4424 /bin/sh/ libvirt: error : argument unsupported: Security model cannot be entered Is there anything that needs to be configured in debian OS for using the 'lxc-enter-namespace' interface? -------------- Best regards! GuanQiang 2013-07-30

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[libvirt-users] ANNOUNCE: Oz 0.11.0 release
by Chris Lalancette 30 Jul '13

30 Jul '13

All, I'm pleased to announce release 0.11.0 of Oz. Oz is a program for doing automated installation of guest operating systems with limited input from the user. Release 0.11.0 is a bugfix and feature release for Oz. Some of the highlights between Oz 0.10.0 and 0.11.0 are: * Add support for installing Ubuntu 13.04 * Add the ability to get user-specific ICICLE information * Add the ability to generate ICICLE safely, by using a disk snapshot * Add the ability to include extra files and directories on the installation ISO * Add the ability to install to alternate file types, like qcow2, etc. * Add support for installing Ubuntu 5.04/5.10 * Add support for installing Fedora 19 * Add support for installing Debian 7 * Add support for Windows 2012 and 8 * Add support for getting files over http for the commands/files section of the TDL * Add support for setting a custom MAC address to guests during installation * Add support for user specified disk and NIC model * Add support for OpenSUSE 12.3 * Add support for URL based installs for Ubuntu A tarball and zipfile of this release is available on the Github releases page: https://github.com/clalancette/oz/releases . Packages for Fedora-18 and Fedora-19 have been built in Koji and will eventually make their way to stable. Instructions on how to get and use Oz are available at http://github.com/clalancette/oz/wiki . If you have questions or comments about Oz, please feel free to contact me at clalancette at gmail.com, or open up an issue on the github page: http://github.com/clalancette/oz/issues . This was one of the most active Oz releases ever, because of the feedback and patches from the community. Thanks to everyone who contributed to this release through bug reports, patches, and suggestions for improvement. Chris Lalancette

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[libvirt-users] Libvirt and Glusterfs pool
by Pierre-Gilles Mialon 28 Jul '13

28 Jul '13

Hi, I use the QEMU-GlusterFS native integration (no Fuse mount) with the libvirt. Now I create a volume issuing : # qemu-img create gluster://localhost/gv1/test.img 5G Then using the libvirt I declare the following lines in my domain.xml : <disk type='network' device='disk'> <driver name='qemu' cache='none'/> <source protocol='gluster' name='gv1/test.img'> <host name='127.0.0.1' transport='tcp' /> </source> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> It works really well. But the better way, would be to only use the libvirt. Is it planned to support a native glusterFS pool type ? That would be great to be able to define a pool like this: <pool type='glusterfs'> <name>myname</name> <source protocol='gluster' volume='gv0'> <host name='127.0.0.1'/> </source> <target> <permissions> <mode>0700</mode> <owner>-1</owner> <group>-1</group> </permissions> </target> </pool> And then create new images using vol-create. Regards, -- Pierre-Gilles Mialon

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[libvirt-users] pinVcpu not working
by Peeyush Gupta 27 Jul '13

27 Jul '13

Hi all, I am working with libvirt and I am trying to set cpu affinity. Now I can always use virsh vcpupin <domain_name> <vcpu> <pcpu> to pin vcpus to pcpus. I want to do it using Python API. Now, there is function pinVcpu which is supposed to do that. But this is not working. For example I gave dom.pinVcpu(0,1) but still my vcpu affinity is for all the pcpus. The function returns 0 (success). Any idea what am I doing wrong? Thanks. ~Peeyush Gupta

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[libvirt-users] dual head with virt-manager, kvm, debian
by Thomas Koch 26 Jul '13

26 Jul '13

Hi, I try to run a debian testing guest inside a debian stable host and would like to use both physical displays to show virtual displays of my guest. Is this possible? I tried setting the heads attribute in the domain xml as described here: https://bugzilla.redhat.com/show_bug.cgi?id=885806#c1 I've tried virt-managers internal viewer, virt-viewer and spicy without any indication of a second display. Regards, Thomas Koch

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[libvirt-users] How to trigger a script in a guest after resume? (aka guest system clock incorrect after host reboot with suspended guest)
by Nils Toedtmann 25 Jul '13

25 Jul '13

Hi Is there a way i can trigger a script within a libvirt guest immediately after resume? E.g. i don't see any log message that indicates to a guest that it had been paused and was just woken up. The problem that i am trying to solve is that when i reboot the host (pausing all guests), the guests' system clocks are a few minutes late after resume. The guests RTC (current_clocksource = kvm-clock) are correct though, so a "hwclock --hctosys" fixed the offset. I only need to find out how to call hwclock right after resume! Right now i call hwclock every few minutes, but i'd like to shorten the window of wrong time. OTOH i'd like to avoid installing ntpd into all guests, given their perfectly fine RTCs. On the host i am using CentOS 6.4 with all patches and the packaged libvirt-0.10.2 and qemu-kvm-0.12.1.2. All guests are Ubuntu 12.04. /nils.

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[libvirt-users] API to set cpuset.cpu_exclusive flag
by Peeyush Gupta 24 Jul '13

24 Jul '13

Hi all, I have been trying to set cpu_exclusive flag. Now I can do it using "echo". I want to know is there any other way (an API) to set this flag? Is it possible to set this flag using API? Thanks. ~Peeyush Gupta

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[libvirt-users] How to monitor a lxc container started by libvirt_lxc from inside ?
by hzguanqiang 24 Jul '13

24 Jul '13

Hi Guys, When I created a lxc container by libvirt, I logged into the lxc container and noticed that info under /proc/ dir did not match the lxc container resource. Is the /proc dir in lxc container just showing the same thing as the lxc host? If I want to monitor the realtime resource usage inside the lxc container, What should I do? -------------- Best regards! GuanQiang 2013-07-23

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[libvirt-users] Is there any document about the feauture and usage of lxc supported by libvirt?
by hzguanqiang 24 Jul '13

24 Jul '13

Hi Guys, Recently, I'm doing some tests on openstack with lxc virtualization supported by libvirt. I need some recently new documents about libvirt lxc. Anything related is just ok. Thanks! -------------- Best regards! GuanQiang 2013-07-23

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[libvirt-users] Resize errors with virt-resize/vgchange
by Alex 23 Jul '13

23 Jul '13

Hi, I have an fc18 system and trying to resize an LVM partition with an ext4 filesystem and receiving the following message from virt-resize: # virt-resize -d --expand /dev/sda1 --LV-expand /dev/mapper/prop-home prop-1.img prop-expand.img command line: virt-resize -d --expand /dev/sda1 --LV-expand /dev/mapper/prop-home prop-1.img prop-expand.img Examining prop-1.img ... libguestfs: trace: add_drive "prop-1.img" "readonly:true" libguestfs: trace: add_drive = 0 libguestfs: trace: add_drive "prop-expand.img" "readonly:false" libguestfs: trace: add_drive = 0 libguestfs: trace: launch libguestfs: trace: get_tmpdir libguestfs: trace: get_tmpdir = "/tmp" libguestfs: trace: get_cachedir libguestfs: trace: get_cachedir = "/var/tmp" libguestfs: trace: disk_format "/var/lib/libvirt/images/prop-expand.img" libguestfs: trace: disk_format = "raw" libguestfs: trace: get_cachedir libguestfs: trace: get_cachedir = "/var/tmp" [...] 100% --:-- libguestfs: trace: launch = 0 libguestfs: trace: lvm_set_filter "/dev/sda" libguestfs: trace: lvm_set_filter = -1 (error) Fatal error: exception Guestfs.Error("lvm_set_filter: vgchange: Couldn't find device with uuid zouQ8X-qxqJ-mp6p-pzg3-mi2i-K9YM-A763Kc. Refusing activation of partial LV home. Use --partial to override. Refusing activation of partial LV swap. Use --partial to override. R libguestfs: trace: close libguestfs: trace: internal_autosync libguestfs: trace: internal_autosync = 0 I don't understand this error message. I also see that vgchange doesn't even have a 'partial' option, so I'm not sure how to troubleshoot it. Here is the filesystem layout for this system: # df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 7.9G 0 7.9G 0% /dev tmpfs 7.9G 0 7.9G 0% /dev/shm tmpfs 7.9G 3.9M 7.9G 1% /run tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup /dev/mapper/prop-root 15G 7.4G 6.3G 55% / tmpfs 7.9G 0 7.9G 0% /tmp /dev/mapper/prop-boot 477M 95M 358M 21% /boot /dev/mapper/prop-home 222G 212G 9.9G 96% /home The image is the 222G /home partition only. The other partitions are on another image. Any ideas how to troubleshoot this would be greatly appreciated. Thanks, Alex

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[libvirt-users] Libvirt-lxc and systemd question
by Matt Hicks 23 Jul '13

23 Jul '13

Warning - I'm fairly new to libvirt, lxc and systemd so there is a good chance I'm doing something terribly wrong here. However, instead of continuing to struggle, I figured I would mail the list for some advice. What I'm trying to accomplish is a libvirt-lxc, systemd-based container running on my system (Fedora 19). I've read that sharing the underlying OS filesystem with the containers doesn't work, so I've installed a minimal Fedora 19 install in /srv/mycontainer. Everything seems to work okay but what I'm struggling with is how to setup the initial accounts. I've tried to attach to the container using 'nsenter' (entering all the namespaces) but it doesn't appear that the bind mounts are in place. For example, I see the /etc/passwd for my host OS, not the container. Is there a better way to setup the initial accounts on the container? Here is what I have installed: $ rpm -qa | grep lxc libvirt-daemon-driver-lxc-1.0.5.2-1.fc19.x86_64 libvirt-daemon-lxc-1.0.5.2-1.fc19.x86_64 $ rpm -qa | grep systemd systemd-libs-204-9.fc19.x86_64 systemd-python-204-9.fc19.x86_64 systemd-sysv-204-9.fc19.x86_64 systemd-libs-204-9.fc19.i686 systemd-204-9.fc19.x86_64 Here is the scenario I'm trying to go through: $ export LIBVIRT_DEFAULT_URI=lxc:/// $ getenforce Enforcing $ sudo yum -y --releasever=19 --nogpg --installroot=/srv/mycontainer --disablerepo='*' --enablerepo=fedora install systemd passwd yum fedora-release vim-minimal ... lots of output $ ls /srv/mycontainer/ bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var $ cat test2.xml <domain type='lxc'> <name>test2</name> <memory>102400</memory> <os> <type arch='x86_64'>exe</type> <init>/bin/systemd</init> </os> <devices> <console type='pty'/> <filesystem type='mount'> <source dir='/srv/mycontainer'/> <target dir='/'/> </filesystem> </devices> </domain> $ virsh define test2.xml Domain test2 defined from test2.xml $ virsh start test2 Domain test2 started # Attach to container to set account passwords $ sudo nsenter -m -u -i -n -p -t `pgrep -f test2` [sudo] password for mhicks: [root@localhost /]# diff -q /srv/mycontainer/etc/passwd /etc/passwd Files /srv/mycontainer/etc/passwd and /etc/passwd differ Any ideas? -Matt

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[libvirt-users] Clipboard
by Dean Hunter 22 Jul '13

22 Jul '13

I am unable to cut and paste between a Fedora 19 host and a Fedora 19 guest. Am I doing something wrong or is this a known problem that I have not been able to find?

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[libvirt-users] Any API in Java Binding for retrieving the actual Memory and CPU usage of a domain?
by V Plus 22 Jul '13

22 Jul '13

I tried some like 'domain.getInfo().memory;', but it is not the actual usage..

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[libvirt-users] CfP 8th Workshop on Virtualization in High-Performance Cloud Computing (VHPC '13)
by VHPC 12 20 Jul '13

20 Jul '13

we apologize if you receive multiple copies of this CfP ================================================================= CALL FOR PAPERS 8th Workshop on Virtualization in High-Performance Cloud Computing (VHPC '13) as part of SC 13, Denver, Colorado | sponsored by ACM sighpc ================================================================= Date: November 22, 2013 Workshop URL: http://vhpc.org Paper Submission Deadline: September 23, 2013 CALL FOR PAPERS Virtualization has become a common abstraction layer in modern data centers, enabling resource owners to manage complex infrastructures independently of their applications. Conjointly, virtualization is becoming a driving technology for a manifold of industry grade IT services. The cloud concept includes the notion of a separation between resource owners and users, adding services such as hosted application frameworks and queueing. Utilizing the same infrastructure, clouds carry significant potential for use in cpu-intensive or data-intensive computing. The ability of clouds to provide for requests and releases of vast computing resources dynamically and close to the marginal cost of providing the services is unprecedented in the history of scientific and commercial computing. This workshop aims to bring together industrial providers with the application community in order to foster discussion, collaboration and mutual exchange of knowledge and experience. The workshop will be one day in length, composed of 20 min paper presentations, each followed by 10 min discussion sections. Lightning talks are limited to 5 minutes. Presentations may be accompanied by interactive demonstrations. TOPICS Topics of interest include, but are not limited to: - Management, deployment and monitoring of VM-based environments - VM-cloud performance monitoring - VM cloud topology management and optimization - Operating systems virtualization supportpptimization - VM-based cloud performance modelling - Network virtualization for VM-environments - Data virtualization - Cloudbursting - Evolved grid architectures including such based on network virtualization - Workload characterization for VM-based environments - Optimized communication libraries/protocols in the cloud - System and process/bytecode VM convergence - Cloud frameworks and APIs - GPU Virtualization architectures and APIs - Checkpointing/migration of large compute jobs - Instrumentation interfaces and languages - VMM performance (auto-)tuning on various load types - Cloud reliability, fault-tolerance, and security - Heterogeneous virtualized environments - Paravirtualized I/O - Services in cloud HPC - Research and education use cases - Virtualization in cloud, cluster and grid environments - Cross-layer VM optimizations - Cloud HPC use cases including optimizations - Energy-aware virtualization - Performance and cost modelling - QoS and and service levels - Languages for describing highly-distributed compute jobs - VM cloud and cluster distribution algorithms, load balancing - Instrumentation interfaces and languages - Hypervisor extensions and tools for cluster and grid computing - Virtual machine monitor platforms - Cluster provisioning in the cloud Important Dates: Rolling Paper registration September 23, 2013 - Full paper submission October 21, 2013 - Acceptance notification November 8, 2013 - Camera-ready version due Lightning Talks: August 9, 2013 - Deadline for lightning talk abstracts September 2, 2013 - Lightning talk notification November 22, 2013 - Workshop Date TPC CHAIR Michael Alexander (chair), TU Wien, Austria Gianluigi Zanetti (co-chair), CRS4, Italy Anastassios Nanos (co-chair), NTUA, Greece PROGRAM COMMITTEE Costas Bekas, IBM, Switzerland Jakob Blomer, CERN Giovanni Busonera, CRS4, Italy Roberto Canonico, University of Napoli Federico II, Italy Simon Crosby, Bromium, USA Tommaso Cucinotta, Alcatel-Lucent Bell Labs, Ireland Casimer DeCusatis, IBM, USA William Gardner, University of Guelph, USA Marcus Hardt, Forschungszentrum Karlsruhe, Germany Sverre Jarp, CERN, Switzerland Xuxian Jiang, NC State, USA Krishna Kant, George Mason University, USA Romeo Kinzler, IBM, Switzerland Nectarios Koziris, National Technical University of Athens, Greece Simone Leo, CRS4, Italy Jean-Marc Menaud, Ecole des Mines de Nantes, France Dimitrios Nikolopoulos, Queen's University of Belfast, UK Josh Simons, VMWare, USA Borja Sotomayor, University of Chicago, USA Yoshio Turner, HP Labs, USA Kurt Tutschku, Blekinge Institute of Technology, Sweden Chao-Tung Yang, Tunghai University, Taiwan PAPER SUBMISSION-PUBLICATION Papers submitted to the workshop will be reviewed by at least two members of the program committee and external reviewers. Submissions should include abstract, key words, the e-mail address of the corresponding author, and must not exceed 8 pages, including tables and figures at a main font size no smaller than 11 point. Submission of a paper should be regarded as a commitment that, should the paper be accepted, at least one of the authors will register and attend the conference to present the work. Accepted papers will be published in the ACM International Conference Proceedings Series. The format must be according to the ACM SIG style. Initial submissions are in PDF; authors of accepted papers will be requested to provide source files. Format Guidelines: http://www.acm.org/sigs/publications/sigguide-v2.2sp Style template: http://www.acm.org/sigs/publications/proceedings-templates Abstract Submission Link: http://edas.info/newPaper.php?c=14791 LIGHTNING TALKS Lightning Talks are non-paper track synoptical in nature that are strictly limited to 5 minutes. They can be used to gain early feedback on ongoing research, for demonstrations, to present research results, early research ideas, perspectives and positions of interest to the community. GENERAL INFORMATION The workshop will be held as part of SC’13, Denver, Colorado. SC 2013: http://sc13.supercomputing.org/

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[libvirt-users] Changing CPU cache size of guest
by Peter Matulis 20 Jul '13

20 Jul '13

Hi everybody, Using libvirt 1.0.0 how does one change the L2 cache size of the virtual CPU? I can change the CPU model but the cache size never changes: <cpu mode='host-passthrough'/> <model>Nehalem</model> OR <cpu match='exact' mode='custom'/> <model>Nehalem</model> Is there a qemu requirement? -- peter matulis

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