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[libvirt-users] CfP 10th Workshop on Virtualization in High-Performance Cloud Computing (VHPC '15)
by VHPC 15 11 Mar '15

11 Mar '15

================================================================= CALL FOR PAPERS 10th Workshop on Virtualization in High-Performance Cloud Computing (VHPC '15) held in conjunction with Euro-Par 2015, August 24-28, Vienna, Austria (Springer LNCS) ================================================================= Date: August 25, 2015 Workshop URL: http://vhpc.org Paper Submission Deadline: May 22, 2015 CALL FOR PAPERS Virtualization technologies constitute a key enabling factor for flexible resource management in modern data centers, cloud environments, and increasingly in HPC as well. Providers need to dynamically manage complex infrastructures in a seamless fashion for varying workloads and hosted applications, independently of the customers deploying software or users submitting highly dynamic and heterogeneous workloads. Thanks to virtualization, we have the ability to manage vast computing and networking resources dynamically and close to the marginal cost of providing the services, which is unprecedented in the history of scientific and commercial computing. Various virtualization technologies contribute to the overall picture in different ways: machine virtualization, with its capability to enable consolidation of multiple under-utilized servers with heterogeneous software and operating systems (OSes), and its capability to live-migrate a fully operating virtual machine (VM) with a very short downtime, enables novel and dynamic ways to manage physical servers; OS-level virtualization, with its capability to isolate multiple user-space environments and to allow for their co-existence within the same OS kernel, promises to provide many of the advantages of machine virtualization with high levels of responsiveness and performance; I/O Virtualization allows physical network adapters to take traffic from multiple VMs; network virtualization, with its capability to create logical network overlays that are independent of the underlying physical topology and IP addressing, provides the fundamental ground on top of which evolved network services can be realized with an unprecedented level of dynamicity and flexibility; These technologies have to be inter-mixed and integrated in an intelligent way, to support workloads that are increasingly demanding in terms of absolute performance, responsiveness and interactivity, and have to respect well-specified Service- Level Agreements (SLAs), as needed for industrial-grade provided services. Indeed, among emerging and increasingly interesting application domains for virtualization, we can find big-data application workloads in cloud infrastructures, interactive and real-time multimedia services in the cloud, including real-time big-data streaming platforms such as used in real-time analytics supporting nowadays a plethora of application domains. Distributed cloud infrastructures promise to offer unprecedented responsiveness levels for hosted applications, but that is only possible if the underlying virtualization technologies can overcome most of the latency impairments typical of current virtualized infrastructures (e.g., far worse tail-latency). The Workshop on Virtualization in High-Performance Cloud Computing (VHPC) aims to bring together researchers and industrial practitioners facing the challenges posed by virtualization in order to foster discussion, collaboration, mutual exchange of knowledge and experience, enabling research to ultimately provide novel solutions for virtualized computing systems of tomorrow. The workshop will be one day in length, composed of 20 min paper presentations, each followed by 10 min discussion sections, and lightning talks, limited to 5 minutes. Presentations may be accompanied by interactive demonstrations. TOPICS Topics of interest include, but are not limited to: - Virtualization in supercomputing environments, HPC clusters, cloud HPC and grids - Optimizations of virtual machine monitor platforms, hypervisors and OS-level virtualization - Hypervisor and network virtualization QoS and SLAs - Cloud based network and system management for SDN and NFV - Management, deployment and monitoring of virtualized environments - Performance measurement, modelling and monitoring of virtualized/cloud workloads - Programming models for virtualized environments - Cloud reliability, fault-tolerance, high-availability and security - Heterogeneous virtualized environments, virtualized accelerators, GPUs and co-processors - Optimized communication libraries/protocols in the cloud and for HPC in the cloud - Topology management and optimization for distributed virtualized applications - Cluster provisioning in the cloud and cloud bursting - Adaptation of emerging HPC technologies (high performance networks, RDMA, etc..) - I/O and storage virtualization, virtualization aware file systems - Job scheduling/control/policy in virtualized environments - Checkpointing and migration of VM-based large compute jobs - Cloud frameworks and APIs - Energy-efficient / power-aware virtualization Important Dates April 29, 2015 - Abstract registration May 22, 2015 - Full paper submission June 19, 2014 - Acceptance notification October 2, 2014 - Camera-ready version due August 25, 2014 - Workshop Date TPC CHAIR Michael Alexander (chair), TU Wien, Austria Anastassios Nanos (co-chair), NTUA, Greece Balazs Gerofi (co-chair), RIKEN Advanced Institute for Computational Science, Japan PROGRAM COMMITTEE Stergios Anastasiadis, University of Ioannina, Greece Costas Bekas, IBM Zurich Research Laboratory, Switzerland Jakob Blomer, CERN Ron Brightwell, Sandia National Laboratories, USA Roberto Canonico, University of Napoli Federico II, Italy Julian Chesterfield, OnApp, UK Patrick Dreher, MIT, USA William Gardner, University of Guelph, Canada Kyle Hale, Northwestern University, USA Marcus Hardt, Karlsruhe Institute of Technology, Germany Iftekhar Hussain, Infinera, USA Krishna Kant, Temple University, USA Eiji Kawai, National Institute of Information and Communications Technology, Japan Romeo Kinzler, IBM, Switzerland Kornilios Kourtis, ETH, Switzerland Nectarios Koziris, National Technical University of Athens, Greece Massimo Lamanna, CERN Che-Rung Roger Lee, National Tsing Hua University, Taiwan Helge Meinhard, CERN Jean-Marc Menaud, Ecole des Mines de Nantes France Christine Morin, INRIA, France Amer Qouneh, University of Florida, USA Seetharami Seelam, IBM Watson Research Center, USA Josh Simons, VMWare, USA Borja Sotomayor, University of Chicago, USA Kurt Tutschku, Blekinge Institute of Technology, Sweden Yasuhiro Watashiba, Osaka University, Japan 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 10 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 Springer LNCS series - the format must be according to the Springer LNCS Style. Initial submissions are in PDF; authors of accepted papers will be requested to provide source files. Format Guidelines: http://www.springer.de/comp/lncs/authors.html Submission Link: https://easychair.org/conferences/?conf=europar2015ws GENERAL INFORMATION The workshop is one day in length and will be held in conjunction with Euro-Par 2015, 24-28 August, Vienna, Austria

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[libvirt-users] Issues with XML validation after upgrade to 1.2.12
by Brian Rak 10 Mar '15

10 Mar '15

After we upgraded to 1.2.12, we've been having issues with libvirt... it complains that our formerly valid guest definitions are now invalid: error: Failed to start domain XXXX error: internal error: Cannot instantiate filter due to unresolvable variables or unavailable list elements: DHCPSERVER We looked into this, and found that it's the XML validation that's failing: # xmllint --noout --relaxng "/share/libvirt/schemas/domain.rng" XXXX.xml --recover Relax-NG validity error : Extra element devices in interleave test.xml:1: element domain: Relax-NG validity error : Element domain failed to validate content test.xml fails to validate And, a minimal domain XML to reproduce it (this won't boot, but it shows the issue): <domain type='kvm' id='65'> <name>XXXX</name> <uuid>b602b5f2-b9d7-43bd-a949-acc7eeeb9f8f</uuid> <memory unit='KiB'>1048576</memory> <devices> <interface type='bridge'> <filterref filter='myfilter'> <parameter name='CTRL_IP_LEARNING' value='none'/> <parameter name='DHCPSERVER' value='104.156.226.10'/> <parameter name='IP' value='104.207.129.11'/> <parameter name='IP6_ADDR' value='2001:19f0:300:2102::'/> <parameter name='IP6_MASK' value='64'/> </filterref> </interface> </devices> </domain> The cause seems to be having multiple parameters in a <filterref> block. We applied the following patch to fix it: diff -ur src_clean/docs/schemas/domaincommon.rng src/docs/schemas/domaincommon.rng --- src_clean/docs/schemas/domaincommon.rng 2015-01-23 06:46:24.000000000 -0500 +++ src/docs/schemas/domaincommon.rng 2015-03-10 11:30:42.057441342 -0400 @@ -4468,6 +4468,7 @@ <data type="NCName"/> </attribute> <optional> + <zeroOrMore> <element name="parameter"> <attribute name="name"> <ref name="filter-param-name"/> @@ -4476,6 +4477,7 @@ <ref name="filter-param-value"/> </attribute> </element> + </zeroOrMore> </optional> </define>

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[libvirt-users] Unable to start sandbox: Kernel module dir /lib/modules/3.18.5-x86_64-linode52/kernel does not exist
by Adam Smith 09 Mar '15

09 Mar '15

Dear all, I have been trying to set up the set up Libvirt Sandbox without success. I want to use virt-sandbox in order to run untrusted programs in a secure environment. I am had no knowledge about virtualization until a couple of days ago, so I am probably doing something wrong. The scenario is the following: Linode instance. OS that I have tried: Ubuntu 14.04, Ubuntu 14, Fedora 21. Both compiling from source and installing the pre-compiled packages. But I always reach the same error: """ $ virt-sandbox -c qemu:///session /bin/date Unable to start sandbox: Kernel module dir /lib/modules/3.18.5-x86_64-linode52/kernel does not exist """ I have been told by the guys of Linode that: "The kernels we use are completely compiled and do not utilize modules. In addition, the kernels are loaded from the host rather than the /boot directory" Any hints to solve this issue? Is the only solution to compile my own kernel? Also, if I decide to use a service like Linode, AWS, Digital Ocean...then the server that I would be using would be already a virtual server. Is it a problem to run virt-sandbox within a server which is already a virtual server? Thanks a lot!

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[libvirt-users] Hyper-V 2008 R2 support ?
by Jean-François FILIPPI 08 Mar '15

08 Mar '15

Hi, I'm trying libvirt to connect to Hyper-V servers. It works fine for Hyper-V 2012 servers, however it doesn't work for Hyper-V 2008 R2 (the exact error is | Call to virConnectOpenAuth failed: internal error: Transport error during enumeration: Could not connect (7) (Libvirt::ConnectionError)|.). I'm using the code provided by libvirt documentation (http://libvirt.org/ruby/examples/open_auth.rb) and have authorized basic auth plus unencrypted connection on both 2008 R2 & 2012 servers (http://libvirt.org/drvhyperv.html#auth) Surfing the Internet to find some solutions, I found this (https://www.redhat.com/archives/libvir-list/2014-April/msg00802.html) where a developer talks about stopping 2008 R2 support (because of some technical stuff), while in the documentation (http://libvirt.org/drvhyperv.html) it is explicitely said to be supporting 2008 R2. My question is : does the support has been stopped or does the code to connect to a 2008 R2 server is different from the 2012 server ? I'm using libvirt 1.2.2 and ruby-libvirt 1.2.2. Thanks for your help, Jean-François FILPPI

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[libvirt-users] ANNOUNCE: Oz 0.13.0 release
by Chris Lalancette 07 Mar '15

07 Mar '15

All, I'm pleased to announce release 0.13.0 of Oz. Oz is a program for doing automated installation of guest operating systems with limited input from the user. Release 0.13.0 is a bugfix and feature release for Oz. Some of the highlights between Oz 0.12.0 and 0.13.0 are: - For Fedora, if the user specifies a version, but that isn't supported yet, try the last supported version (in this case), as that will often work. - Fix a regression where we forgot to force the qcow2 image type - Allow installs that use more than one installation device - Add support for RHEL 6.5 - Rename OEL-6 to OL-6 - Add support for Ubuntu 14.04 - Add Windows 8.1 support - Add CentOS-7 support - Add the ability to specify kernel parameters in the TDL - Make sure to remove dhcp leases from guests after the install - Fix support for FreeBSD - Add in support for TDL "precommands"; these are commands that are run *before* package installation - Fix up file locking - Add support for RHEL 5.11 - Remove Ubuntu ssh keys at the end of installation - Add support for Ubuntu 14.10 - Add support for XInclude, for merging various TDLs together - Add Fedora 21 support - Add support for ppc64 and ppc64le A tarball and zipfile of this release is available on the Github releases page: https://github.com/clalancette/oz/releases . Packages for Fedora-20, Fedora-21, Fedora-22, EPEL-6, and EPEL-7 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 . Thanks to everyone who contributed to this release through bug reports, patches, and suggestions for improvement. Chris Lalancette

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[libvirt-users] live migration - qemu hook
by Martin Klepáč 05 Mar '15

05 Mar '15

Hi, I am using qemu hook script to track status of VM live migration - libvirt 1.2.9 as included in Debian Wheezy backports. I would like to be informed of the fact that VM migration has successfully finished as soon as possible. Based on the steps below, when would that be possible? Sample VM migration as detected by qemu hook script: 1.) Destination hypervisor: [10:27:42.224] Args: one-16 migrate begin 2.) Destination hypervisor: [10:27:42.253] Args: one-16 prepare begin 3.) Destination hypervisor: [10:27:42.472] Args: one-16 start begin 4.) Destination hypervisor: [10:27:42.890] Args: one-16 started begin 5.) Actual VM migration...takes approximately 10 seconds in this case. 6.) Source hypervisor: [10:27:51.847] Args: one-16 stopped end 7.) Source hypervisor: [10:27:51.882] Args: one-16 release end Based on the website, "Unless an error occurs during the migration process, the *qemu* hook script on the *source* host is then executed with the "stopped" and "release" operations to indicate it is no longer running on this host." So the source hypervisor in steps no. 6 and 7 knows that it is no longer running a VM, right? Does that mean that the destination hypervisor is already running the VM at the moment corresponding to step no. 6? If so, is there any hook on the destination hypervisor, which would inform of the fact that the hypervisor has copied the last portions of VM memory and has become responsible for the VM in question? Thank you, Martin

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Re: [libvirt-users] [virt-tools-list] libvirt/virt-manager source integration with xen
by Cole Robinson 04 Mar '15

04 Mar '15

On 03/02/2015 10:55 AM, Wayne Mills wrote: > Hi, > > I built and installed Xen 4.5.0 from source, on top of Ubuntu 14.04.2, using > "make world" and "make install" targets. I then installed latest virt-manager > from pre-built packages. After bringing up virt-manager I attempt to connect > to Xen hypervisor and got: > > unable to connect to libvirt > Failed to connect socket to /var/run/libvirt/libvirt-sock' No such file > or directory > > I then noticed libvirt-bin isn't running. If I try to issue 'service > libvirt-bin start' it gives me back a process number, but it apparently dies > quickly because the service still shows as down. Three log files are touched > during my start attempt: > > -rw-r--r-- 1 root root 39757 Feb 27 06:00 /var/log/xenstored-access.log > -rw-r--r-- 1 root root 44908 Feb 27 06:00 > /var/log/libvirt/libxl/libxl-driver.log > -rw------- 1 root root 46396 Feb 27 06:00 /var/log/libvirt/libvirtd.log > > * xenstored-access.log has 22 new entries, grouped into pairs that increment > an "Axx" identifier and go from A63 to A73. Here is the A63 logs: > > [20150227T11:00:29.478Z] A63 newconn > [20150227T11:00:29.479Z] A63 endconn > > * libxl-driver.log also has 11 log groupings that are just the same set of > logs repeated 11 times. Here is the first group: > > xc: detail: sysctl operation failed -- need to rebuild the user-space > tool set? > libxl: error: libxl.c:4320:libxl_get_physinfo: getting physinfo: > Permission denied > xc: debug: hypercall buffer: total allocations:7 total releases:7 > xc: debug: hypercall buffer: current allocations:0 maximum allocations:1 > xc: debug: hypercall buffer: cache current size:1 > xc: debug: hypercall buffer: cache hits:6 misses:1 toobig:0 > > * libvirtd.log also has 11 log groupings, that are just the same set of logs > repeated 11 times. Here is that group: > > 2015-02-27 11:00:29.479+0000: 4842: info : libvirt version: 1.2.2 > 2015-02-27 11:00:29.479+0000: 4842: error : libxlDriverConfigNew:1131 : > Unable to configure libxl's memory management parameters > 2015-02-27 11:00:29.479+0000: 4842: error : virStateInitialize:749 : > Initialization of LIBXL state driver failed: Unknown problem > 2015-02-27 11:00:29.479+0000: 4842: error : daemonRunStateInit:920 : > Driver state initialization failed > > When I google for libxl_get_physinfo I see other reported errors during "xl > info" and other "xl" commands. I tried "xl info" and that works for me and > does not alter the log files: > > root@<server>:~# xl info > host : server > release : 3.13.0-46-generic > version : #75-Ubuntu SMP Tue Feb 10 15:24:04 UTC 2015 > machine : x86_64 > nr_cpus : 8 > max_cpu_id : 7 > nr_nodes : 2 > cores_per_socket : 4 > threads_per_core : 1 > cpu_mhz : 2400 > hw_caps : > bfebfbff:2c100800:00000000:00003f00:17bee3ff:00000000:00000001:00000000 > virt_caps : hvm hvm_directio > total_memory : 98168 > free_memory : 128 > sharing_freed_memory : 0 > sharing_used_memory : 0 > outstanding_claims : 0 > free_cpus : 0 > xen_major : 4 > xen_minor : 5 > xen_extra : .0 > xen_version : 4.5.0 > xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 > hvm-3.0-x86_32p hvm-3.0-x86_64 > xen_scheduler : credit > xen_pagesize : 4096 > platform_params : virt_start=0xffff800000000000 > xen_changeset : Mon Jan 12 11:30:05 2015 -0500 git:a8ac229 > xen_commandline : placeholder > cc_compiler : gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2 > cc_compile_by : root > cc_compile_domain : cisco.com <http://cisco.com> > cc_compile_date : Thu Feb 19 07:26:00 EST 2015 > xend_config_format : 4 > root@<server>:~# > > After consulting with xen-users mailer, I was given this response by "Ian": > > "Did you install libvirt from source or from packages? If the latter then you > may have a disconnect between the packaged version and your source-built Xen. > You'll probably need to rebuild libvirt against your Xen libraries." > > What are the virt-related steps to take to test out Ian's idea? I have root > access to one machine that serves both as a host to VM's as well as a build > environment for source builds such as this. I already built xen 4.5.0 and > installed it. Do I now need to separately download and build libvirt, then > download and build virt-manager? Is it important to place the virt* code > within the xen source tree, or do something else so that the virt* code > compiles "against" an appropriate xen environment? > > In summary, I would like some guidance on how to build libvirt, and if needed, > virt-manager, source against a specific Xen version. > Distro packages of virt-manager should work fine, once you get libvirt building. I recommend you download the ubuntu .deb config files for libxl, and rebuild+install libxl with the exact same build flags your distro packages use. They've already figured out the necessary flags to make things work together with the other distro packages. Then do the same with libvirt. - Cole

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[libvirt-users] Broken OS when booting rootfs from 9p share
by Olivier Mauras 02 Mar '15

02 Mar '15

Hello, I've been trying to boot a VM with the rootfs being a 9P share from the host. The VM OS is centos 7. The OS boots but no services can work and it appears that the authentication system is broken. Now the funny thing is that booting the same OS on the same 9P share manually with Qemu works as expected with a fully functionnal OS... So I'm wondering what could libvirt do that render the OS on the share broken - Something with rights ? Selinux is disabled on the host, and accessmode to the share is set to passthrough in both cases. Here's my working Qemu line: qemu -kernel /srv/overlay/kernels/grsec-3.14.33-101/vmlinuz-3.14.33-101.el6.x86_64 -initrd /srv/overlay/kernels/grsec-3.14.33-101/initramfs-3.14.33-101.el6.x86_64.img -fsdev local,id=r,path=/srv/overlay/run/irc,security_model=passthrough -device virtio-9p-pci,fsdev=r,mount_tag=root -nographic -m 256M -machine pc-i440fx-2.1,accel=kvm -netdev tap,id=net0 -device virtio-net,netdev=net0,mac=52:54:00:12:36:34 -smp 1,sockets=1,cores=1 -append 'root=virtfs:root rootflags=trans=virtio,version=9p2000.u ro rootfstype=9p console=ttyS0' And here my libvirt VM config: <domain type='kvm'> <name>irc</name> <uuid>ffbd32eb-a693-eadd-8923-18de80137472</uuid> <memory unit='KiB'>262144</memory> <currentMemory unit='KiB'>262144</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64' machine='pc-i440fx-2.1'>hvm</type> <kernel>/srv/overlay/kernels/grsec-3.14.33-101/vmlinuz-3.14.33-101.el6.x86_64</kernel> <initrd>/srv/overlay/kernels/grsec-3.14.33-101/initramfs-3.14.33-101.el6.x86_64.img</initrd> <cmdline>root=virtfs:root rootflags=trans=virtio,version=9p2000.u ro rootfstype=9p</cmdline> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-system-x86_64</emulator> <controller type='usb' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'/> <filesystem type='mount' accessmode='passthrough'> <source dir='/srv/overlay/run/irc'/> <target dir='root'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </filesystem> <interface type='bridge'> <mac address='52:54:00:00:36:34'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> </domain> My libvirt version is 1.2.9, and qemu is 2.1.2. Thanks for your help, Olivier

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[libvirt-users] simple network and firewalld errors
by lejeczek 02 Mar '15

02 Mar '15

hi everybody I have a simple network: <network> <name>default</name> <uuid>1e71fa47-4893-4435-8b60-575d2b51c231</uuid> <forward mode='nat'> <nat> <port start='1024' end='65535'/> </nat> </forward> <bridge name='virbr0' stp='on' delay='0' /> <mac address='52:54:00:58:47:4b'/> <ip address='192.168.4.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.4.2' end='192.168.4.254' /> </dhcp> </ip> </network and I wonder what might be wrong, I get many errors in firewalld when I restart libvirtd Main PID: 13194 (firewalld) CGroup: /system.slice/firewalld.service └─13194 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid 2015-03-01 17:12:46 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete FORWARD --out-interface virbr0 --jump REJECT' failed: iptables: No chain/target/match by that name. 2015-03-01 17:12:46 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete FORWARD --in-interface virbr0 --jump REJECT' failed: iptables: No chain/target/match by that name. 2015-03-01 17:12:47 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete INPUT --in-interface virbr0 --protocol udp --destination-port 53 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?). 2015-03-01 17:12:47 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete INPUT --in-interface virbr0 --protocol tcp --destination-port 53 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?). 2015-03-01 17:12:47 ERROR: COMMAND_FAILED: '/sbin/iptables --table mangle --delete POSTROUTING --out-interface virbr0 --protocol udp --destination-port 68 --jump CHECKSUM --checksum-fill' failed: iptables: No chain/target/match by that name. 2015-03-01 17:12:48 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete INPUT --in-interface virbr0 --protocol udp --destination-port 67 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?). 2015-03-01 17:12:48 ERROR: COMMAND_FAILED: '/sbin/iptables --table filter --delete INPUT --in-interface virbr0 --protocol tcp --destination-port 67 --jump ACCEPT' failed: iptables: Bad rule (does a matching rule exist in that chain?). 2015-03-01 17:36:03 ERROR: NOT_ENABLED 2015-03-01 17:36:04 ERROR: NOT_ENABLED 2015-03-01 18:19:35 ERROR: NOT_ENABLED grateful for all suggestions thanks

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[libvirt-users] Failed to connect socket to '/usr/local/libvirt/var/run/libvirt/libvirt-sock
by Aditi Aggarwal 01 Mar '15

01 Mar '15

With respect to your thread started Tue, 30 Oct 2012, please guide me if you were able to solve the error. link to the thread. https://www.redhat.com/archives/libvirt-users/2012-October/msg00139.html Thanks!

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[libvirt-users] DriveReady error after live migration
by Steve Gaarder 27 Feb '15

27 Feb '15

I have three machines running libvirt under Scientific Linux (RHEL derivative) version 6. The virtual machine disk images are running SL 5 and 6, are all stored on NFS, and I can do live migrations with virsh migrate --live guestname qemu+ssh://vmhostname.math.cornell.edu/system Trouble is, within a day or two after the migration, the guest hangs up with repeated DriveReady errors and has to be shut down forcibly and rebooted. I am using Sanlock, with the lock files also stored on NFS. Any ideas? Steve Gaarder System Administrator, Dept of Mathematics Cornell University, Ithaca, NY, USA gaarder(a)math.cornell.edu

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[libvirt-users] KVM management through the web with libvirt and mist.io
by Markos Gogoulos 26 Feb '15

26 Feb '15

Hi, I would like to announce that we have integrated libvirt for managing KVM vms on mist.io. Mist.io is an open source project and a service that can assist you in managing your vms on a unified way, providing a simple interface for all of your infrastructure (multiple public cloud providers, OpenStack based public/private clouds, Docker servers, bare metal servers and now KVM hypervisors). Adding a KVM backend via libvirt will show a list of all of the virtual machines (running and terminated), along with the hypervisor itself. You can execute actions such as reboot, shutdown and start. Instead of having to log in to the hypervisor to reboot a VM that has hanged, you can do it with a few taps on your smartphone, laptop or tablet, along with the rest of your infrastructure. You can also have a web ssh shell if you add an ssh key. Creation of new VMs is not supported yet but is on our plans. You can have a look on a blog post we've written recently at http://blog.mist.io/post/110890044256/announcing-kvm-and-vcloud-support, use the open source tool (http://github.com/mistio/mist.io) or try out the service (https://mist.io) offering more features such as monitoring, adding custom metrics, scripts and logs. Hope you'll find it usefull Cheers, Markos

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[libvirt-users] Adding timestamps for all emulator output
by Andrey Korolyov 26 Feb '15

26 Feb '15

Hello, I think it would be useful if libvirt will be able to prefix all messages from emulator pipes with the date stamping, for example I am trying to catch very rare and non-fatal race with virtio-serial-bus: Guest failure in adding device virtio-serial0.0 which is specific to the Windows guests on qemu-kvm. I have supporting infrastructure which can tell me exact times for every action upon this VM, but as bug is not frequent, the continuous monitoring looks like an overkill for a desired goal - find a correlation between emulator event and message from stderr. Patching emulator itself is barely an option, as it is ugly, requires refresh of the running code via loopback migration and completely non-universal, as every hypervisor should be modified seperately. I`d highly appreciate positive consideration for such functionality addition or can write a patch shortly, if needed. Thanks!

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[libvirt-users] Questión about DNS config on dnsmasq
by Carlos Miranda Molina (Mstaaravin) 26 Feb '15

26 Feb '15

Hello guys... I'm using libvirt in my local laboratory and I have a question/problem about DNS settings over dnsmasq (by libvirt) I have a NAT network separately from my real network, i need simulated some DNS hosts to NAT network like ftp.debian.org (for testing purposes, etc) This is for example a dumpxml (yes, i'm using PXE boot for testing and is working fine) <network> <name>net0</name> <uuid>5a014735-f658-7a87-c7d4-e6b0f488c332</uuid> <forward mode='nat'/> <bridge name='net0' stp='on' delay='0'/> <mac address='52:54:00:b5:24:7b'/> <dns> <host ip='192.168.122.1'> <hostname>mirrors.kernel.org</hostname> <hostname>mirrors.dcarsat.com.ar</hostname> <hostname>ftp.debian.org</hostname> </host> </dns> <ip address='192.168.122.1' netmask='255.255.255.0'> <tftp root='/home/tftp'/> <dhcp> <range start='192.168.122.2' end='192.168.122.99'/> <bootp file='pxelinux.0'/> </dhcp> </ip> </network> Look <dns> & <hostname> section, that works correctly but only if I add hostnames on net0 when was offline. <dns> <host ip='192.168.122.1'> <hostname>mirrors.kernel.org</hostname> <hostname>mirrors.dcarsat.com.ar</hostname> <hostname>ftp.debian.org</hostname> </host> </dns> How i can add more hostnames with my network (net0) are still online...? virsh net-update default add-last dns-host (for example, doesn't work) and the official documentation @ http://libvirt.org/formatnetwork.html#elementsAddress doesn't say more. I test with <forwarder > but doesn't work (192.168.10.100 is a dnsmasq outside libvirt control) <network> <name>net0</name> <uuid>5a014735-f658-7a87-c7d4-e6b0f488c332</uuid> <forward mode='nat'/> <bridge name='net0' stp='on' delay='0'/> <mac address='52:54:00:b5:24:7b'/> <dns> <forwarder addr="192.168.10.100"/> </dns> <ip address='192.168.122.1' netmask='255.255.255.0'> <tftp root='/home/tftp'/> <dhcp> <range start='192.168.122.2' end='192.168.122.99'/> <bootp file='pxelinux.0'/> </dhcp> </ip> </network> Anyone can help me...? thanks -- "La Voluntad es el único motor de nuestros logros" http://blog.ngen.com.ar/

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[libvirt-users] A problem with converting an OVA appliance
by Marko Dimjašević 25 Feb '15

25 Feb '15

Hi all, I've been having a problem when trying to convert an Open Virtualization Appliance (OVA) format appliance to the "virt-image" format. This is how I try to convert the appliance: $ virt-convert --arch=i686 -i ovf appliance.ova The result is: ERROR Couldn't import file "appliance.ova": must be string without null bytes or None, not str This happens on a Debian Wheezy (7.8) machine. virt-convert is at version 0.600.1. All libvirt* packages are at version 1.2.9. Unfortunately, I couldn't find anyone else through web searches having the same issue and then applying their solution. It'd be great if someone can help with trying to figure out what is going on here... -- Regards, Marko http://dimjasevic.net/marko

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[libvirt-users] Fwd: Unattended guest installation fails
by ChandraShekar Shastri 25 Feb '15

25 Feb '15

Hi, I am following the below link to install a Fedora19 guest on Fedora19 Host. http://kashyapc.com/2011/08/18/unattended-guest-install-with-a-local-kickst… Version : libvirtd (libvirt) 1.0.5.1, QEMU emulator version 1.4.2, Copyright (c) 2003-2008 Fabrice Bellard I have the iso which I loop mounted and created a http repo using python module "python -m SimpleHTTPServer". This repo is properly accessible and the guest is able to pull the initrd.img and vmlinuz but further it fails. Please find the attached xml and console messages and let me know how to proceed further. Thanks, Chandrashekar

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[libvirt-users] libvirt unprivileged user and containers
by Vasiliy Tolstov 24 Feb '15

24 Feb '15

Hello. I need to create container on remote host that runs libvirt. Does it possible to download container image, extract it and run via libvirt? As i see in all cases libvirt need prepared dir with root file system, but in my case i'm not able to unpack archive on remote side because it need root privileges. How can i solve my problem? -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

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[libvirt-users] live migration
by Thomas Stein 24 Feb '15

24 Feb '15

Hola. Just tried a live migration after fixing the pc-q35-2.1 error. Now i have new problem. It seems during live migration only the ram gets migrated. I use the following command. # virsh migrate --live domain qemu+ssh://newhost/system --copy-storage-all --verbose --persistent It works without problems. Apart from beeing way to fast. # virsh migrate --live domain qemu+ssh://newhost/system --copy-storage-all --verbose --persistent Migration: [100 %] On the destination i can enter the VM but thats it. There is no filesystem and so on. Did the migration syntax change? I use libvirt 1.2.12 and qemu 2.2.0. Thanks for any hints. best regards

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[libvirt-users] libvirt 1.2.12 + xen 4.4 wont migrate
by albie 24 Feb '15

24 Feb '15

Hi, We have been trying to get live migration working between two xen boxes running libvirt 1.2.12, However i seem to be getting the following error root@libvirt-xen1:~# virsh migrate --live trusty-image qemu+ssh://192.168.13.9/system --copy-storage-all --verbose --persistent --undefinesource root(a)192.168.13.9's password: error: unsupported flags (0x48) in function libxlDomainMigrateBegin3Params root@libvirt-xen1:~# virsh migrate --live trusty-image xen+ssh://192.168.13.9/system --copy-storage-all --verbose --persistent --undefinesource root(a)192.168.13.9's password: error: unsupported flags (0x48) in function libxlDomainMigrateBegin3Params Any ideas as to why this might be happening ? Regards, Albie Thomson

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[libvirt-users] HugePages - can't start guest that requires them
by G. Richard Bellamy 23 Feb '15

23 Feb '15

Hello All, I'm trying to enable hugepages, I've turned off THP (Transparent Huge Pages), and enabled hugepages in memoryBacking, and set my 2MB hugepages count via sysctl. I'm getting "libvirtd[5788]: Failed to autostart VM 'atlas': internal error: Unable to find any usable hugetlbfs mount for 16777216 KiB" where atlas is one of my guests and 16777216 KiB is the amount of memory I'm trying to give to the guest. Yes, i can see the hugepages via numastat -m and hugetlbfs is mounted via /dev/hugepages and there is a dir structure /dev/hugepages/libvirt/qemu (it's empty). HugePages is big enough to accommodate the 16G i'm allocating... and changing the perms on that directory structure to 777 doesn't work either. Any help is much appreciated. HOST: http://sprunge.us/SEdc GUEST: http://sprunge.us/VCYB Regards, Richard

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[libvirt-users] Broken OS when booting rootfs from 9p share
by Olivier Mauras 23 Feb '15

23 Feb '15

Hello, I've been trying to boot a VM with the rootfs being a 9P share from the host. The VM OS is centos 7. The OS boots but no services can work and it appears that the authentication system is broken. Now the funny thing is that booting the same OS on the same 9P share manually with Qemu works as expected with a fully functionnal OS... So I'm wondering what could libvirt do that render the OS on the share broken - Something with rights ? Selinux is disabled on the host, and accessmode to the share is set to passthrough in both cases. Here's my working Qemu line: qemu -kernel /srv/overlay/kernels/grsec-3.14.33-101/vmlinuz-3.14.33-101.el6.x86_64 -initrd /srv/overlay/kernels/grsec-3.14.33-101/initramfs-3.14.33-101.el6.x86_64.img -fsdev local,id=r,path=/srv/overlay/run/irc,security_model=passthrough -device virtio-9p-pci,fsdev=r,mount_tag=root -nographic -m 256M -machine pc-i440fx-2.1,accel=kvm -netdev tap,id=net0 -device virtio-net,netdev=net0,mac=52:54:00:12:36:34 -smp 1,sockets=1,cores=1 -append 'root=virtfs:root rootflags=trans=virtio,version=9p2000.u ro rootfstype=9p console=ttyS0' And here my libvirt VM config: <domain type='kvm'> <name>irc</name> <uuid>ffbd32eb-a693-eadd-8923-18de80137472</uuid> <memory unit='KiB'>262144</memory> <currentMemory unit='KiB'>262144</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64' machine='pc-i440fx-2.1'>hvm</type> <kernel>/srv/overlay/kernels/grsec-3.14.33-101/vmlinuz-3.14.33-101.el6.x86_64</kernel> <initrd>/srv/overlay/kernels/grsec-3.14.33-101/initramfs-3.14.33-101.el6.x86_64.img</initrd> <cmdline>root=virtfs:root rootflags=trans=virtio,version=9p2000.u ro rootfstype=9p</cmdline> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-system-x86_64</emulator> <controller type='usb' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'/> <filesystem type='mount' accessmode='passthrough'> <source dir='/srv/overlay/run/irc'/> <target dir='root'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </filesystem> <interface type='bridge'> <mac address='52:54:00:00:36:34'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> </domain> My libvirt version is 1.2.9, and qemu is 2.1.2. Thanks for your help, Olivier

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[libvirt-users] virtio nic dosent use 10gbe speed.
by Kalil de A. Carvalho 20 Feb '15

20 Feb '15

Hello all. We are moving from Xenserver 6.5 environment to KVM because we can't use 10gbe speed in our VM's so we decided to test KVM. To inicial test I've create script, using qemu commands, to build two VM's and test the nic speed. Each VM has one nic, using virtio, into it own bridge. In this bridge we associate one 10gbe physical nic. They can communicate each other. When we try do a copy, through SCP, the speed is 300mbps. And if we open another copy this speed been the half. What we are using: S.O: CentOS 7 Kernel 3.10.0-123.el7.x86_64 qemu-kvm.x86_64 10:1.5.3-60.el7 libvirt-daemon.x86_64 1.1.1-29.el7 Hardware: Dell PowerEdge R720 16GB RAM 2TB SAS Two Broadcom Corporation NetXtreme II BCM57810 10 Gigabit Command to start VM's: /usr/libexec/qemu-kvm -m 1024 -enable-kvm -k en-us -hda teste1.img -net nic,model=virtio,macaddr=00:01:02:aa:bb:cc -net tap,ifname=tap1,script=no,downscript=no -vnc :0 What Do I doing wrong? Is my test right? Is my interpretation right? Is my enviroment correct? Can I improve or fix any think with my libvirt or command arguments? Best regards -- Atenciosamente, Kalil de A. Carvalho

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[libvirt-users] encryption
by Henry Noack 16 Feb '15

16 Feb '15

Hello you guys, it is possible to decrypt a kvm volume only by using the command line after starting it? Best regards Henry

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[libvirt-users] spice session locking
by Jon Doe 16 Feb '15

16 Feb '15

Hi List, Is it possible to prevent other clients from stealing my libvirtd hosted spice session? This is a problem for me where multiple co-workers access the same guest over a qemu+ssh:// connection. Instead of simply disconnecting clients, I'd like libvirtd to deny the new client. I've been looking at polkit acl rules and the vnc sharePolicy attribute but so far no luck.

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[libvirt-users] libvirt live migration, qcow2 image, nbd server
by Edward Young 15 Feb '15

15 Feb '15

Hi all, When I live migrate a vm using "migrate --live --copy-storage-all mig-vm qemu+ssh://192.168.1.3/system tcp://192.168.1.3" I got the following error WARNING: Image format was not specified for 'nbd://node2:49155/drive-virtio-disk0' and probing guessed raw. 258 Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. 259 Specify the 'raw' format explicitly to remove the restrictions. >From the error itself, I can tell that nbd server treat this image as raw, rather than qcow2. My platform is libvirt+qemu. the image type of this vm is indeed qcow2. I do not know how to let nbd know this image format. Thanks! Ed

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