Bridged Networking - Virtual Environments
by Jorge Fábregas
Hello everyone,
I'm learning about bridged networking and how it is applied to virtual
environments (bypassing all the automation provided by libvirtd etc) .
I have a question regarding ip configuration for the virtual bridge.
Let's say I have a host (my machine) where I want to run 3 VMs bridged
to my home network (thru eth0). I have a DHCP server running on my DSL
router, and I have dhcp enabled on my 3 VMs so they all should get a
lease from the DHCP.
As far as a I know these are the raw steps needed to accomplish this:
1- create br0
2- remove current ip address from eth0
3- enslave eth0 to br0
4- create tap devices
5- attach tap devices to br0
6- assign tap devices to every VM
As you can see I haven't assigned an ip address to the virtual bridge
(br0). Why is it that (on almost any site that I visit with this setup)
they always end up assigning an ip address to br0?
Thanks in advance!
Jorge
11 years, 8 months
proprietary virtualbox extensions for usb, rdb, and pxe boot
by drew einhorn
I used to grit my teeth and use them, but Oracle's behavior in the Oracle
v. Google lawsuit disgusts me, and I don't want to have anything to do with
Oracle. You have to have an Oracle account for the virtualbox forums.
Trying to sort through the alternatives. I really want usb, rdb, and pxe
boot. But I can live without them for now if I have to. Virtualbox ran
well on systems without svm, or vmx flag, and I'm not ready to upgrade
boxes.
--
Drew Einhorn
"You can see a lot by just looking."
-- Yogi Berra
11 years, 10 months
Fedora 17 testing as Xen VM / Xorg issue
by Pasi Kärkkäinen
Hello,
I just did some installs with F17 RC4 (the GA version) as a Xen VM.
Xen host/dom0: RHEL 5.8 x86_64 with the included Xen rpms.
Tested F17 RC4 VMs:
- 32bit F17 PV domU: graphical GUI install works OK using the Xen vfb/pvfb
but Xorg fails to start during normal boot after installation.
- 64bit F17 PV domU: graphical GUI install works OK using the Xen vfb/pvfb
but Xorg fails to start during normal boot after installation.
- 32bit F17 PVHVM guest: X fails to start so VNC install must be used, install works OK thru VNC.
Xorg fails to start during normal boot after installation.
- 64bit F17 PVHVM guest: X fails to start so VNC install must be used, install works OK thru VNC.
Xorg fails to start during normal boot after installation.
(PVHVM == HVM fully virtualized guest with optimized Xen PV drivers.
Optimized Xen PVHVM drivers are nowadays included and used as a default with
recent upstream Linux kernel versions (2.6.36+), so disk/net IO doesn't have to be emulated by Xen Qemu-dm.)
I wonder if the problem with X failing to start is related to:
http://fedoraproject.org/wiki/Features/DRI2DriversOnly
Xen HVM guests have Qemu-dm emulated Cirrus VGA adapter (or stdvga) visible to the VM..
which doesn't have DRM/KMS drivers, and I think it's the same for xen-fbfront.
I think I saw Cirrus (Qemu) DRM/KMS driver being worked on dri-devel mailinglist..
Any ideas/comments?
-- Pasi
11 years, 10 months
[ANNOUNCE] libguestfs 1.18 released - tools for managing virtual machines and disk images
by Richard W.M. Jones
I'm pleased to announce the latest stable release of libguestfs, a
library and a set of tools for reading, writing, managing, inspecting,
rescuing, resizing and aligning disk images, and offline and live
virtual machines. There are many new features and bug fixes in this
release; see the release notes below.
You can get libguestfs 1.18.0 from:
Main website: http://libguestfs.org
Source: http://libguestfs.org/download/1.18-stable/
Fedora 17: https://admin.fedoraproject.org/updates/libguestfs-1.18.0-1.fc17
Debian/Ubuntu: [coming soon]
Rich.
Release notes for libguestfs 1.18.0
-----------------------------------
These release notes only cover the differences from the previous
stable/dev branch split (1.16.0). For detailed changelogs, please see
the git repository, or the ChangeLog file distributed in the tarball.
New features
virt tools:
- virt-sysprep has been rewritten and expanded (thanks Wanlong Gao)
http://libguestfs.org/virt-sysprep.1.html
- virt-sparsify --zero is a new option that zeroes the named
partition or filesystem
- virt-sparsify can now safely sparsify Linux swap partitions
- virt-sparsify fixed so it cleans up after ^C
http://libguestfs.org/virt-sparsify.1.html
- a new tool 'libguestfs-make-fixed-appliance' is provided to build
fixed appliances that can be copied to other machines that don't
have febootstrap support
http://libguestfs.org/libguestfs-make-fixed-appliance.1.html
- virt-filesystems now displays the parents (containers) of MD
devices and volume groups
- virt-alignment-scan, run with no args, displays alignment information
for all libvirt domains
- virt-df and virt-alignment-scan will display information from all
guests even when a disk is inaccessible
- virt-rescue new --scratch option to make scratch disks
https://rwmj.wordpress.com/2012/04/26/virt-rescue-scratch/#content
- virt-make-fs can now be used to create btrfs
- virt-edit preserves permissions, UID, GID and SELinux context
when editing files
- guestfish passes the close event over stdout and remote correctly
- guestfish new '--pipe-error' option lets you detect errors in pipe
commands
- guestfish globs now expand device names
- comma and colon characters in filenames now handled correctly by
all virt tools
inspection:
- added support for Fedora 17+
- added support for FreeDOS
- added support for Buildroot and Cirros
- inspection is now compatible with Windows guests that have been
sysprepped (thanks Grant Williamson).
API:
- broad support for btrfs added, including adding multiple devices,
fsck, snapshots (thanks Wanlong Gao)
- the new 'mount-local' API brings FUSE support directly into the
core libguestfs API
https://rwmj.wordpress.com/2012/05/14/tip-using-mount-local-api-from-c/#c...
- new man page: guestfs-performance(1), which contains performance
tuning tips
http://libguestfs.org/guestfs-performance.1.html
- new man page: guestfs-faq(1), Frequently Asked Questions
http://libguestfs.org/guestfs-faq.1.html
- ENOTSUP (from guestfs_last_errno) is now returned for APIs that
are not supported
examples:
- 'copy_over' example showing how to copy between two handles
- 'display_icon' program displays the icon associated with a guest
- 'mount_local.c' example shows how to use the mount-local API
Security
(no security problems were found or fixed in this release)
New APIs
btrfs-device-add: Add devices to a btrfs filesystem.
btrfs-device-delete: Remove devices from a btrfs filesystem.
btrfs-filesystem-sync: Sync a btrfs filesystem.
btrfs-filesystem-balance: Balance a btrfs filesystem.
btrfs-fsck: Check btrfs filesystem.
btrfs-set-seeding: Enable or disable seeding.
btrfs-subvolume-create: Create a btrfs snapshot.
btrfs-subvolume-delete: Delete a btrfs snapshot.
btrfs-subvolume-list: List btrfs snapshots and subvolumes.
btrfs-subvolume-set-default: Set default btrfs subvolume.
btrfs-subvolume-snapshot: Create a writable btrfs snapshot.
get-e2attrs: List ext2 file attributes of a file.
get-e2generation: Get ext2 file generation of a file.
isoinfo, isoinfo-device: Get information from the header of ISO files.
llz: List files with SELinux information.
lvcreate-free: Create an LVM logical volume in % remaining free space.
md-stat: Return underlying devices from an MD device.
mkfs-brtfs: Make btrfs filesystem, with all tunables.
mount-local, mount-local-run, umount-local: FUSE support in the API.
ntfsclone-in, ntfsclone-out: Save, restore NTFS from backup.
ntfsfix: Fix common errors and force Windows to check NTFS.
set-e2attrs: Set or clear ext2 file attributes of a file.
set-e2generation: Set ext2 file generation of a file.
set-label: Unified interface for setting filesystem label.
vgmeta: Get volume group metadata.
wipefs: Wipe filesystem signatures from a device.
zero-free-space: Zero free space in a filesystem.
Internals
- The debian/ subdirectory has been removed. We recommend you use
the official Debian packages made by Hilko Bengen.
http://people.debian.org/~bengen/libguestfs/
http://packages.debian.org/search?keywords=libguestfs
- O_CLOEXEC / SOCK_CLOEXEC is now used for almost all file
descriptors that the library opens.
- posix_fadvise is called when sequentially reading or writing large
files.
- close all file descriptors and remove all signal handlers in the
recovery process
- multiple gcc warnings and Coverity bugs have been fixed; many
strict-overflow bugs have also been fixed
- use ./configure --enable-valgrind-daemon to use valgrind on the
daemon; many errors have been fixed
- use ./configure --with-qemu-options to pass extra options to qemu
- the daemon now has a growable strings buffer type (DECLARE_STRINGSBUF)
- the <guestfs.h> header file works with C++ and we have a regression
test for this
- multiple APIs which should only be called in the CONFIG state now
give an error if they are not
- .gitignore fixed to use absolute paths
- gobject bindings have been expanded, including mapping libguestfs
events to gobject signals (thanks Matt Booth)
- gobject documentation is generated properly (thanks Matt Booth)
- gobject header files now live in a subdirectory
- CompareWithString test in the generator now works
- FUInt32, FUInt64 struct field types now use the correct XDR type
- OCaml tests are now run on bytecode and native code.
- java -Xlint:all is used, and all warnings have been fixed
- bmptopng, wrestool (etc) missing or failure no longer prints
warning messages
- ruby: Use RbConfig instead of Config.
- PYTHONPATH is set by the ./run script.
- appliance building is now thread-safe.
- appliance now uses 'ip' instead of 'ifconfig' and 'netstat'
commands
- several fixes to make parallel builds work properly
- guestfish --listen now cleans up properly
- the BUSY state has been removed
- gettextize has been removed, replaced by a simple Makefile.am
- gettext support now covers virt-resize, virt-sparsify and virt-sysprep
- better support for the arm architecture
Bugs fixed
- 822490 virt-ls error: "libguestfs: error: checksum: path: parameter cannot be NULL"
- 816839 data overflow error when debug progress -1
- 816098 virt-make-fs fails to make a btrfs filesystem because it doesn't allocate enough space
- 811872 inspection fails on ubuntu 10.04 guest with encrypted swap
- 811650 guestfs_last_error not set when qemu fails early during launch
- 811649 libguestfs cannot open disk images which are symlinks to files that contain ':' (colon) character
- 811117 [RFE][virt-sysprep] net-hwaddr not removed from "ifcfg-*" files on rhel
- 811112 [RFE][virt-sysprep] hostname can not be changed on rhel system
- 809361 inspection doesn't recognize Fedora 18 (grub2 + GPT)
- 807905 mkfs blocksize option breaks when creating btrfs
- 805070 virt-filesystems should show 'parents' of LV and RAID devices
- 804464 libguestfs cannot be built when LINGUAS is different then ja or uk
- 803664 libguestfs inspection fails on Windows XP: libguestfs: error: hivex: could not locate HKLM\SYSTEM\MountedDevices
- 803533 guestfish: write error
- 802389 event handlers for 'close' event doesn't work in remote mode
- 802109 libguestfs uses putc on stderr, results in many individual 1 byte writes of debug messages
- 801640 [RFE] the error reported by resize2fs-M need to be more clear
- 801298 Possible null dereference and resource leaks
- 801273 Document for set-pgroup need to be updated
- 798196 virt-resize confuses format and output_format variables; using --output-format sets the input format
- 797986 virt-resize on Windows XP in sysprep state causes "UNMOUNTABLE_BOOT_VOLUME" BSOD
- 796520 [RFE] Prevent user from running some appliance configure commands after appliance boot up
- 790721 multiprovider build error: RuntimeError: link: /tmp/.guestfs-0/kernel /tmp/.guestfs-0/kernel.10139: File exists
- 789960 guestfsd crash when try to mount non-exist disk
- 789504 virt-df (other tools?) should not give up if a guest disk is missing
- 788641 virt-edit doesn't preserve file permissions
- 786215 libguestfs inspection does not recognize FreeDOS operating system
- 786188 libguestfs inspection does not recognize FreeDOS install CD
- 785668 aug-defnode: daemon crash
- 784647 Libguestfs uses deprecated net-tools
- 769304 virt-resize on RHEL 6 kernel fails to re-read the partition table
- 755729 Error message for resize2fs-M needs tweaking
- 701814 virt-win-reg fails on a libvirt guest that has no defined disk format: "format parameter is empty or contains disallowed characters"
- 679737 libguestfs: improve error message when zerofree is not available in the appliance
- 635971 glob mkfs ext2 /dev/vd[b-t]1 does not expand
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://et.redhat.com/~rjones/virt-top
11 years, 11 months
vcpu affinity issue after host resumes from suspend
by Chuck Mattern
I am running a Lenovo T410 with an Intel Core i5 CPU M 560 @ 2.67GHz and 8
gigs RAM. When the laptop resumes from the suspended stat any running VM
will have it's CPU affinity locked to CPU0. Has anyone else seen this?
Any workarounds or permanent fixes?
--
"As iron sharpens iron, so one man sharpens another."
-Proverbs 27:17
11 years, 11 months
Log filling with bogus(?) VLAN-related error message
by Ian Pilcher
My syslog is getting flooded with messages like this:
Nov 19 15:27:16 ian libvirtd: 15:27:16.949: 2725: error :
virInterfaceDefParseXML:807 : XML description for vlan interface misses
the vlan element is not well formed or invalid
I do have tagged VLAN interfaces on the host (br0.1, br0.4, and
br0.251), but none of my VMs are using them. I am not using any
libvirt-managed networks at all:
[pilcher@ian ~]$ sudo virsh net-list --all
Name State Autostart
-----------------------------------------
default inactive no
I am running libvirt-0.8.8-7.fc15.x86_64.
Any ideas?
Thanks!
--
========================================================================
Ian Pilcher arequipeno(a)gmail.com
"If you're going to shift my paradigm ... at least buy me dinner first."
========================================================================
11 years, 11 months
Submission Deadline Extension
by VHPC 15
we apologize if you receive multiple copies of this CFP
===================================================================
CALL FOR PAPERS
7th Workshop on
Virtualization in High-Performance Cloud Computing
VHPC '12
as part of Euro-Par 2012, Rhodes Island, Greece
===================================================================
Date: August 28, 2012
Workshop URL: http://vhpc.org
SUBMISSION DEADLINE:
June 11, 2012 - Full paper submission (extended)
SCOPE:
Virtualization has become a common abstraction layer in modern
data centers, enabling resource owners to manage complex
infrastructure 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
high-performance scientific 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.
Distributed computing concepts that leverage federated resource
access are popular within the grid community, but have not seen
previously desired deployed levels so far. Also, many of the scientific
data centers have not adopted virtualization or cloud concepts yet.
This workshop aims to bring together industrial providers with the
scientific 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.
Presentations may be accompanied by interactive demonstrations.
TOPICS
Topics of interest include, but are not limited to:
Higher-level cloud architectures, focusing on issues such as:
- Languages for describing highly-distributed compute jobs
- Workload characterization for VM-based environments
- Optimized communication libraries/protocols in the cloud
- Cross-layer optimization of numeric algorithms on VM infrastructure
- System and process/bytecode VM convergence
- Cloud frameworks and API sets
- Checkpointing/migration of large compute jobs
- Instrumentation interfaces and languages
- VMM performance (auto-)tuning on various load types
- Cloud reliability, fault-tolerance, and security
- Software as a Service (SaaS) architectures
- Research and education use cases
- Virtualization in cloud, cluster and grid environments
- Cross-layer VM optimizations
- Cloud use cases including optimizations
- VM-based cloud performance modelling
- Performance and cost modelling
Lower-level design challenges for Hypervisors, VM-aware I/O devices,
hardware accelerators or filesystems in VM environments, especially:
- Cloud, grid and distributed filesystems
- Hardware for I/O virtualization (storage/network/accelerators)
- Storage and network I/O subsystems in virtualized environments
- Novel software approaches to I/O virtualization
- Paravirtualized I/O subsystems for modified/unmodified guests
- Virtualization-aware cluster interconnects
- Direct device assignment
- NUMA-aware subsystems in virtualized environments
- Hardware Accelerators in virtualization (GPUs/FPGAs)
- Hardware extensions for virtualization
- VMMs/Hypervisors for embedded systems
Data Center management methods, including:
- QoS and and service levels
- VM cloud and cluster distribution algorithms
- VM load-balancing in Clouds
- Hypervisor extensions and tools for cluster and grid computing
- Fault tolerant VM environments
- Virtual machine monitor platforms
- Management, deployment and monitoring of VM-based environments
- Cluster provisioning in the Cloud
PAPER SUBMISSION
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
Style template:
ftp://ftp.springer.de/pub/tex/latex/llncs/latex2e/llncs2e.zip
Abstract Submission Link: http://edas.info/newPaper.php?c=11943
IMPORTANT DATES
Rolling abstract submission
June 11, 2012 - Full paper submission (extended)
June 29, 2012 - Acceptance notification
July 20, 2012 - Camera-ready version due
August 28, 2012 - Workshop Date
CHAIR
Michael Alexander (chair), TU Wien, Austria
Gianluigi Zanetti (co-chair), CRS4, Italy
Anastassios Nanos (co-chair), NTUA, Greece
PROGRAM COMMITTEE
Paolo Anedda, CRS4, Italy
Giovanni Busonera, CRS4, Italy
Brad Calder, Microsoft, USA
Roberto Canonico, University of Napoli Federico II, Italy
Tommaso Cucinotta, Alcatel-Lucent Bell Labs, Ireland
Werner Fischer, Thomas-Krenn AG, Germany
William Gardner, University of Guelph, USA
Marcus Hardt, Forschungszentrum Karlsruhe, Germany
Sverre Jarp, CERN, Switzerland
Shantenu Jha, Louisiana State University, USA
Xuxian Jiang, NC State, USA
Nectarios Koziris, National Technical University of Athens, Greece
Simone Leo, CRS4, Italy
Ignacio Llorente, Universidad Complutense de Madrid, Spain
Naoya Maruyama, Tokyo Institute of Technology, Japan
Jean-Marc Menaud, Ecole des Mines de Nantes, France
Dimitrios Nikolopoulos, Foundation for Research&Technology Hellas, Greece
Jose Renato Santos, HP Labs, USA
Walter Schwaiger, TU Wien, Austria
Yoshio Turner, HP Labs, USA
Kurt Tutschku, University of Vienna, Austria
Lizhe Wang, Indiana University, USA
Chao-Tung Yang, Tunghai University, Taiwan
DURATION: Workshop Duration is one day.
GENERAL INFORMATION
The workshop will be held as part of Euro-Par 2012.
Euro-Par 2012: http://europar2012.cti.gr/
11 years, 11 months
Re: [fedora-virt] [Fedora-xen] Reminder: Fedora 17 virt test day going on right now!
by Dario Faggioli
On Fri, 2012-05-04 at 13:11 -0400, Gordon McLellan wrote:
> Specs:
> Core i7-3820 Sandy Bridge-E cpu 4 core, 8 thread
> Asus Sabertooth x79 main board
> 32gb ddr3-1600 ram
> Radeon HD7970 graphics adapter
>
>
> I'll post up my vt-d success story in a separate thread, but I was
> grinning ear to ear when it first started working.
>
That is very cool! If you want to put it on the Xen wiki as well
(http://wiki.xen.org/wiki/Main_Page), please feel free to go there and
post an article. Maybe here http://wiki.xen.org/wiki/Category:Tutorial,
or here http://wiki.xen.org/wiki/Category:HowTo, or as a followup of
this http://wiki.xen.org/wiki/Fedora_16_Dom0 ...or wherever you think it
fits. We're really striving for that kind of contribution! :-)
Regards,
Dario
--
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://retis.sssup.it/people/faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
11 years, 11 months
Re: [fedora-virt] [Fedora-xen] Reminder: Fedora 17 virt test day going on right now!
by M A Young
On Fri, 4 May 2012, Konrad Rzeszutek Wilk wrote:
> On Fri, May 04, 2012 at 09:36:49AM -0400, Gordon McLellan wrote:
>>
>> I'm going to buy a serial card for this machine so I can do the serial
>> console on Xen and get more information. But so far, so good!
>
> You can try to do (on Xen) 'console=vga vga=text-80x50 guest_loglvl=all loglvl=all noreboot"
> and on the Linux command line: "console=hvc0 earlyprintk=xen loglevel=8 debug radeon.modeset=0 radeon.modeset=0"
>
> That should give you some idea where it is crashing and take a photo.
If you are capturing logging with a photo, it can be helpful to add a
boot_delay parameter eg. boot_delay=100 to the kernel line, particularly
if the interesting lines scroll off the top of the screen before you can
capture them. It does slow the boot down considerably though so you may
need to adjust the parameter to get the balance right between it being
slow enough to capture without taking ages to get to the crash.
Michael Young
11 years, 11 months
