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| | [[Category:Virtualization]] <!-- do not copy into FWN issue --> |
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| {{Anchor|Virtualization}} | | {{Anchor|Virtualization}} |
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| == Virtualization == | | == Virtualization == |
| In this section, we cover discussion on the @et-mgmnt-tools-list, @fedora-xen- list, @libvirt-list and @ovirt-devel-list of Fedora virtualization technologies. | | In this section, we cover discussion of Fedora virtualization technologies on the |
| | | @fedora-virt list. |
| Contributing Writer: [[DaleBewley | Dale Bewley]]
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| === Fedora 10 Virtualization ===
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| This section contains a description of the virtualization features of the brand new Fedora 10 release.
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| ==== New Features ====
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| The Fedora 10 release includes a number of virtualization enhancements over previous releases.
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| In the Virtualization Beat of the release notes[1] you will find
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| details on new software packages and major new features such as:
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| * '''Unified Kernel Image'''
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| : The <code>kernel-xen</code> package has been obsoleted by the integration of paravirtualization operations in the upstream kernel.
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| * '''Virtualization Storage Management'''
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| : Advances in libvirt now provide the ability to list, create, and delete storage volumes on remote hosts.
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| * '''Remote Installation of Virtual Machines'''
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| : Improvements in Virtualization Storage Management have enabled the creation of guests on remote host systems.
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| [1] http://fedoraproject.org/wiki/Docs/Beats#Virtualization
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| ==== Updates to Virtualization Software ====
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| Virtualization on Fedora is achieved through the hard work of many projects including
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| <code>kvm</code>,
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| <code>libvirt</code>,
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| <code>virt-manager</code>,
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| <code>xen</code>,
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| and others.
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| Below is a listing of some of the virtualization software found in Fedora, illustrating the updates since the release of Fedora 9.
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| {| class="wikitable" border="1"
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| |+ Virtualization Software Versions
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| |-
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| ! Software !! F9 Release !! F10 Release !! Release Notes or Changes
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| |-
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| | kvm || 65-1 || 74-5 || http://kvm.qumranet.com/kvmwiki/ChangeLog
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| |-
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| | libvirt || 0.4.2-1 || 0.4.6-3 || http://www.libvirt.org/news.html
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| |-
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| | python-virtinst||0.300.3-5 || 0.400.0-4 || http://virt-manager.et.redhat.com/download.html
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| |-
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| | virt-df || n/a || 2.1.4-2 || http://et.redhat.com/~rjones/virt-df/
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| |-
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| | virt-manager || 0.5.4-3 || 0.6.0-3 || http://virt-manager.et.redhat.com/download.html
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| |-
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| | virt-mem || n/a || 0.2.9-6 || http://et.redhat.com/~rjones/virt-mem/faq.html
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| |-
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| | virt-top || 0.4.1.1-1 || 1.0.3-2 || http://et.redhat.com/~rjones/virt-top/ChangeLog.txt
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| |-
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| | virt-viewer || 0.0.3-1 || 0.0.3-3 || http://virt-manager.et.redhat.com/download.html
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| |-
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| | xen || 3.2.0-10 || 3.3.0-1 || http://www.xen.org/download/
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| |-
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| | xenner || 0.29-2 || 0.46-3 || http://cvs.bytesex.org/xenner.html
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| |-
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| | xenwatch || n/a || 0.5.3-1 || http://cvs.bytesex.org/xenwatch.html
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| |}
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| === Enterprise Management Tools List ===
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| This section contains the discussion happening on the [https://www.redhat.com/mailman/listinfo/et-mgmt-tools et-mgmt-tools list]
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| ==== Connecting to VNC Console on Remote System Installs ====
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| While executing <code>virt-install</code> on a remote system, Stephan found[1]
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| that the installer created a VNC service listening on 127.0.0.1, and wanted to
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| know how to connect to this service or move it to a public interface on the
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| remote system.
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| [[DanielBerrange|Daniel P. Berrange]] answered[2] that
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| modifying the <code>vnc_listen</code> parameter in <code>/etc/libvirt/qemu.conf</code>
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| will affect the IP used, but this isn't necessary. The <code>virt-viewer</code> application will automatically tunnel[3][4] VNC connection over SSH.
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| <pre>virt-viewer --connect qemu+ssh://root@remotehost/system centos1</pre>
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| [1] http://www.redhat.com/archives/et-mgmt-tools/2008-November/msg00041.html
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| [2] http://www.redhat.com/archives/et-mgmt-tools/2008-November/msg00042.html
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| [3] http://virt-manager.org/page/RemoteSSH
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| [4] http://libvirt.org/remote.html
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| | |
| ==== Specifying Installation Media URLs ====
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| [[EnzoMedici|Enzo Medici]] became[1] frustrated while trying to provision Xen
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| domUs with <code>virt-manager</code>. "What constitutes a valid install media
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| URL?" "How do you get a valid install media URL for a particular Linux
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| distribution?"
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| [[ColeRobinson|Cole Robinson]] explained[2]
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| "We actually don't have support in the backend for fetching kernels
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| from Ubuntu trees" yet. "This may work at the moment though since it could be detected as a debian tree." Cole then described the installation URLs for some popular distributions.
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| * For Fedora, it has varied a bit for different releases, but basically whatever ends in <code>{ARCH}/os</code>:
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| : http://download.fedora.redhat.com/pub/fedora/linux/releases/9/Fedora/x86_64/os/
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| * CentOS is similar, but seems to have ARCH and os reversed:
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| : http://mirrors.cmich.edu/centos/5/os/x86_64/
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| * Debian/Ubuntu trees are everything up to the <code>install-{ARCH}</code> dir:
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| : http://us.archive.ubuntu.com/ubuntu/dists/etch/main/installer-i386
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| [1] http://www.redhat.com/archives/et-mgmt-tools/2008-November/msg00044.html
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| [2] http://www.redhat.com/archives/et-mgmt-tools/2008-November/msg00046.html
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| === Fedora Xen List ===
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| This section contains the discussion happening on the [https://www.redhat.com/mailman/listinfo/fedora-xen fedora-xen list].
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| ==== Xen No Graphical Console and CentOS ====
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| While creating a domU on CentOS 5.2, Jason passed
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| <code>--nographics</code> to <code>virt-install</code>
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| and received the error message: ''No console available for domain''.
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| Investigation <code>/var/log/xen</code> uncovered:
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| ''Could not initialize SDL - exiting''.
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| [[Cole Robinson|Cole Robinson]] responded[2] that
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| "This is actually a known bug: <code>xen</code> doesn't abide nographics
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| and tries to init <code>SDL</code>. This will almost always fail if
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| run through [CentOS] 5.2 <code>libvirt</code>. This bug will be fixed in [CentOS] 5.3."
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| The <code>--vnc</code> flag may be used as a workaround this crash in the meantime.
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| [1] http://www.redhat.com/archives/fedora-xen/2008-November/msg00015.html
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| [2] http://www.redhat.com/archives/fedora-xen/2008-November/msg00016.html | | Contributing Writer: [[User:Dale | Dale Bewley]] |
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| === Libvirt List === | | === Fedora Virtualization List === |
| This section contains the discussion happening on the [https://www.redhat.com/mailman/listinfo/libvir-list libvir-list]. | | This section contains the discussion happening on the |
| | [http://www.redhat.com/mailman/listinfo/fedora-virt fedora-virt list]. |
|
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| ==== User Mode Linux Support ==== | | ==== Virt Status Report ==== |
| [[DanielBerrange|Daniel P. Berrange]] improved[1] the user mode linux | | [[JustinForbes|Justin Forbes]] |
| driver[2] (See FWN#148[3]), by improving stability and adding documentation.
| | posted<ref>http://www.redhat.com/archives/fedora-virt/2009-December/msg00056.html</ref> a Fedora virtualization status report. |
| Network support is not yet available, but the driver is planned for
| | Justin pointed out F13 bugs<ref>http://fedoraproject.org/wiki/Virtualization_bugs</ref> now include Important and Pony classifications in addition to Blocker and Target. |
| release with <code>libvirt</code> 0.5.0.
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|
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| [1] http://www.redhat.com/archives/libvir-list/2008-November/msg00239.html
| | <references /> |
|
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| [2] http://libvirt.org/drvuml.html
| | ==== RHEL and Fedora Virtualization Feature Parity ==== |
| | Robert Day wondered how the virtualization features<ref>http://www.redhat.com/virtualization/rhev/</ref> of Red Hat Enterprise Linux 5.4 |
| | compared to Fedora 12. |
|
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| [3] http://fedoraproject.org/wiki/FWN/Issue148#Experimental_User_Mode_Linux_Driver | | [[DanielBerrange|Daniel Berrange]] |
| | explained<ref>http://www.redhat.com/archives/fedora-virt/2009-December/msg00040.html</ref> |
| | "The KVM based virtualization in RHEL-5.4 is not nearly so far behind |
| | Fedora as you might think. The {{package|libvirt}} mgmt stack in RHEL-5.4 was |
| | rebased to be near parity with [[Releases/11|Fedora 11]], and KVM in RHEL-5.4 is |
| | also pretty close to that using what's best described as a hybrid of |
| | kvm-83 and kvm-84." |
|
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| ==== Increased Network Throughput with Large MTU ====
| | <references /> |
| [[ChrisWright|Chris Wright]] created[1] a proof of concept patch
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| "for setting a large MTU size on a tap[2] device. With this we are able to improve net i/o throughput substantially (~40%
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| improvement on TX and ~130% improvement on RX). This is just RFC because
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| it's hardcoded to an MTU of 9000 for any tap device."
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|
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| [1] http://www.redhat.com/archives/libvir-list/2008-November/msg00225.html
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|
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| [2] http://www.mjmwired.net/kernel/Documentation/networking/tuntap.txt
| | ==== ==== |
| | <references /> |
|
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|
| === oVirt Devel List === | | ==== ==== |
| This section contains the discussion happening on the [https://www.redhat.com/mailman/listinfo/ovirt-devel ovirt-devel list].
| | <references /> |
libvirt