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== Virtualization ==
 
== Virtualization ==
 
In this section, we cover discussion of Fedora virtualization technologies on the
 
In this section, we cover discussion of Fedora virtualization technologies on the
@fedora-virt and @fedora-xen-list
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@fedora-virt, @fedora-xen-list, @libguestfs, @libvirt-list,
lists.
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and @virt-tools-list lists.
  
 
Contributing Writer: [[User:Dale | Dale Bewley]]
 
Contributing Writer: [[User:Dale | Dale Bewley]]
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[http://www.redhat.com/mailman/listinfo/fedora-virt fedora-virt list].
 
[http://www.redhat.com/mailman/listinfo/fedora-virt fedora-virt list].
  
==== KSM Tuning Service  ====
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==== Fedora Virt Status ====
A new feature for [[Releases/12 | Fedora 12]], Kernel Samepage Merging<ref>http://fedoraproject.org/wiki/Features/KSM</ref>,
+
In the latest Fedora virtualization status report,
enables KVM guest virtual machines to share identical memory pages. This is especially useful when running multiple guests from the same or similar base operating system image. Because memory is shared, the combined memory usage of the guests is reduced. KSM works by scanning memory, looking for identical pages.
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[[MarkMcLoughlin|Mark McLoughlin]]
 +
reminds<ref>http://www.redhat.com/archives/fedora-virt/2009-September/msg00040.html</ref>
 +
us
 +
"The Fedora 12 release is looming large. At this stage, all efforts
 +
should be focused on polishing off everything for the final release."
 +
and "September 17th, we will be holding be holding Fedora
 +
Test Day<ref>http://fedoraproject.org/wiki/Test_Day:2009-09-17_Virtualization</ref> in order to test all the latest Fedora 12 virt goodies".
 +
 
 +
Read on for Mark's full treatment of the latest developments in virtualization.
  
[[DanKenigsberg |Dan Kenigsberg ]]
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<references />
posted<ref>http://www.redhat.com/archives/fedora-virt/2009-September/msg00023.html</ref>
 
a KSM control daemon in a
 
"simple script that controls whether (and with what vigor) should ksm search duplicated memory pages."
 
  
"An unattended host running a variable number of qemu-kvm's needs to tune
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==== Fedora 12 Virtualization Release Notes ====
ksm automatically, since when memory is tight, it's better to spend more
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The initial draft of the virtualization portion<ref>http://fedoraproject.org/wiki/Documentation_Virtualization_Beat</ref> of the release notes is
cpu on merging pages. In more relaxed cases, it's just a waste of time."
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complete. Read all about the 11 amzaing new features and other improvements! F12 F11 had 6 new
 +
features by comparison.
  
 
<references />
 
<references />
  
==== Host Iptables Settings for Bridged Guests ====
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=== Fedora Xen List ===
[[MarkMcLoughlin|Mark McLoughlin]]
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This section contains the discussion happening on the
pointed<ref>http://www.redhat.com/archives/fedora-virt/2009-September/msg00014.html</ref>
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[http://www.redhat.com/mailman/listinfo/fedora-xen fedora-xen list].
out that the recommended<ref>http://wiki.libvirt.org/page/Networking#Fedora.2FRHEL_Bridging</ref>
 
means of configuring iptables on the host to allow traffic to pass to
 
a bridged guest is to disable netfilter on the bridge altogether.
 
  
<pre>
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==== ====
  # cat >> /etc/sysctl.conf <<EOF
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<references />
net.bridge.bridge-nf-call-ip6tables = 0
 
net.bridge.bridge-nf-call-iptables = 0
 
net.bridge.bridge-nf-call-arptables = 0
 
EOF
 
# sysctl -p /etc/sysctl.conf
 
</pre>
 
  
This "will be the default with Fedora 12."
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=== Virtualization Tools List ===
 +
This section contains the discussion happening on the
 +
[http://www.redhat.com/mailman/listinfo/virt-tools-list virt-tools-list list].
  
 +
====  ====
 
<references />
 
<references />
  
=== Fedora Xen List ===
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=== Libguestfs List ===
 
This section contains the discussion happening on the
 
This section contains the discussion happening on the
[http://www.redhat.com/mailman/listinfo/fedora-xen fedora-xen list].
+
[http://www.redhat.com/mailman/listinfo/libguestfs libguestfs list].
  
==== Xen Domain0 Kernels ====
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==== ====
Until support for pv_ops<ref>http://fedoraproject.org/wiki/Features/XenPvopsDom0</ref> is added to the upstream kernel (F13?), it takes some twiddling to host Xen guests on Fedora.
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<references />
Even then it isn't recommended for anything more than experimentation at this time.
 
More adventurous users are reporting some success with experimental kernels and running a Xen dom0.<ref>http://www.redhat.com/archives/fedora-xen/2009-September/msg00000.html</ref>
 
<ref>http://www.redhat.com/archives/fedora-xen/2009-September/msg00025.html</ref>
 
<ref>http://bderzhavets.wordpress.com/2009/09/05/setup-xen-3-4-1-libvirt-on-top-f12-alpha-rawhide/</ref>
 
  
Current dom0 kernel options include
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=== Libvirt List ===
building<ref>http://www.redhat.com/archives/fedora-xen/2009-September/msg00019.html</ref>
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This section contains the discussion happening on the
one from Jeremy Fitzhardinge's git repository or
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[http://www.redhat.com/mailman/listinfo/libvir-list libvir-list].
installing<ref>http://www.redhat.com/archives/fedora-xen/2009-August/msg00083.html</ref>
 
Brian Young's RPM.  
 
  
 +
====  ====
 
<references />
 
<references />

Revision as of 04:40, 13 September 2009


Virtualization

In this section, we cover discussion of Fedora virtualization technologies on the @fedora-virt, @fedora-xen-list, @libguestfs, @libvirt-list, and @virt-tools-list lists.

Contributing Writer: Dale Bewley

Fedora Virtualization List

This section contains the discussion happening on the fedora-virt list.

Fedora Virt Status

In the latest Fedora virtualization status report, Mark McLoughlin reminds[1] us "The Fedora 12 release is looming large. At this stage, all efforts should be focused on polishing off everything for the final release." and "September 17th, we will be holding be holding Fedora Test Day[2] in order to test all the latest Fedora 12 virt goodies".

Read on for Mark's full treatment of the latest developments in virtualization.

Fedora 12 Virtualization Release Notes

The initial draft of the virtualization portion[1] of the release notes is complete. Read all about the 11 amzaing new features and other improvements! F12 F11 had 6 new features by comparison.

Fedora Xen List

This section contains the discussion happening on the fedora-xen list.


Virtualization Tools List

This section contains the discussion happening on the virt-tools-list list.


Libguestfs List

This section contains the discussion happening on the libguestfs list.


Libvirt List

This section contains the discussion happening on the libvir-list.