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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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| === 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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| ==== Starting Guests from a Desktop Icon ====
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| [[OrionPoplawski|Orion Poplawski]] said[1]
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| "I'd like to provide an icon that would startup the virtual machine and connect to it."
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| [[ColeRobinson|Cole Robinson]] posted[2] a couple of ways to accomplish this.
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| * With <code>virt-manager</code> and support for CDROM and USB devices
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| <pre>
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| UUID=`virsh --connect qemu:///system domuuid vm-name`
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| virsh --connect qemu:///system start $UUID
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| virt-manager --connect qemu:///system \
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| --show-domain-console=$UUID
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| </pre>
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| * With <code>virt-viewer</code> which won't support CDROM and USB access
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| <pre>
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| UUID=`virsh --connect qemu:///system domuuid vm-name`
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| virsh --connect qemu:///system start $UUID
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| virt-viewer --connect qemu:///system $UUID
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| </pre>
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| Each solution requires adequate user permissions to work.
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| [1] https://www.redhat.com/archives/et-mgmt-tools/2008-October/msg00100.html
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| [2] https://www.redhat.com/archives/et-mgmt-tools/2008-October/msg00103.html
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| ==== libvirt Plugins for Performance Monitoring Applications ====
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| [[GuidoGünther|Guido Günther]] announced[1] the creation
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| of plugins[2] for net and block I/O monitoring in Munin[3].
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| [[DanielVeillard|Daniel Veillard]] posted[4] a patch to add this and
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| similar plugins for collectd[5] and Nagios[6] to the libvirt
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| applications page[7].
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| [1] https://www.redhat.com/archives/et-mgmt-tools/2008-October/msg00118.html
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| [2] http://munin.projects.linpro.no/
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| [3] http://honk.sigxcpu.org/projects/libvirt/monitor/
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| [4] https://www.redhat.com/archives/et-mgmt-tools/2008-October/msg00121.html
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| [5] http://collectd.org/plugins/libvirt.shtml
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| [6] http://et.redhat.com/~rjones/nagios-virt/
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| [7] http://libvirt.org/apps.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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| === Libvirt List ===
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| This section contains the discussion happening on the [https://www.redhat.com/mailman/listinfo/libvir-list libvir-list].
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| ==== Openvz Bridge Support and Related Patches ====
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| [[DanielBerrange|Daniel Berrange]] posted[1] a
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| patch series "derived from [[AntonProtopopov|Anton Protopopov]] / [[EvgeniySokolov|Evgeniy Sokolov]] bridge device patches. It first does some generic refactoring of MAC
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| address handler in all drivers, then adds code to extract OpenVZ[2] version
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| number, then does network config, and finally does filesystem config."
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| [1] https://www.redhat.com/archives/libvir-list/2008-October/msg00323.html
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| [2] http://wiki.openvz.org/
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| ==== Guest Image Locking ====
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| [[ItamarHeim|Itamar Heim]] asked[1]
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| "how libvirt envisions image locking. i.e., how do we make sure multiple nodes are not trying to access the same storage volume".
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| [[DanielBerrange|Daniel Berrange]] said[2]
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| in the domain XML format "the semantics are that every <disk> section
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| added to a guest config is read-write, with an exclusive lock. To allow
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| multiple guests to use the same disk, is intended that you add either
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| <readonly/> or <sharable/> element within the <disk>."
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| Adding, "we only implement this for the Xen driver, handing off
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| the actuall logic to XenD to perform. That we don't implement this in
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| the QEMU driver is a clear shortcoming that needs addressing. "
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| The problem on a single host is relatively simple, but more complex among multiple host nodes.
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| [[GuidoGünther|Guido Günther]] has been toying[3] "with the idea of using
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| DLM[4] for libvirt".
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| [1] https://www.redhat.com/archives/libvir-list/2008-October/msg00334.html
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| [2] https://www.redhat.com/archives/libvir-list/2008-October/msg00336.html
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| [3] https://www.redhat.com/archives/libvir-list/2008-October/msg00342.html
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| [4] http://sources.redhat.com/cluster/dlm/ | | Contributing Writer: [[User:Dale | Dale Bewley]] |
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| ==== Exporting the Label on Block Devices ==== | | === Fedora Virtualization List === |
| [[ChrisLalancette|Chris Lalancette]] described[1] his patch
| | This section contains the discussion happening on the |
| "To support LVM partitioning in oVirt, one of the things we need is the ability
| | [http://www.redhat.com/mailman/listinfo/fedora-virt fedora-virt list]. |
| to tell what kind of label is currently on a block device. Here, a 'label' is
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| used in the same sense that it is used in parted; namely, it defines which kind
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| of partition table is on the disk, whether it be DOS, LVM2, SUN, BSD, etc." Not
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| the partition type.
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| [1] https://www.redhat.com/archives/libvir-list/2008-October/msg00341.html | | ==== Virt Status Report ==== |
| | [[JustinForbes|Justin Forbes]] |
| | posted<ref>http://www.redhat.com/archives/fedora-virt/2009-December/msg00056.html</ref> a Fedora virtualization status report. |
| | 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. |
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| ==== Experimental User Mode Linux Driver ====
| | <references /> |
| [[DanielBerrange|Daniel P. Berrange]] applied[1] a patch that
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| "implements a driver supporting User Mode Linux[2] guests. User mode
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| linux is a kind of paravirtualized kernel which runs on a plain Linux host.
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| It requires no elevated privileges at all, except for some of the network
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| integration. It is a pretty straightforward thing to invoke, so I figured
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| it would be easy to write a driver to support it. I was right :-)"
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| [1] https://www.redhat.com/archives/libvir-list/2008-October/msg00355.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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| [2] http://user-mode-linux.sourceforge.net/ | | [[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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| ==== Experimental Driver Thread Safety ====
| | <references /> |
| [[DanielBerrange|Daniel P. Berrange]] continued[1] work toward making libvirt thread-safe.
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| The "series of 5 patches implement basic thread safety for the
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| QEMU, LXC and Network drivers. It does not address the OpenVZ or Test
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| driver yet. The Xen driver is totally stateless so does not require
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| changes - though I do need to verify there's no 'static' variables that
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| are used in an unsafe yet in Xen drivers." Daniel's earlier work was referenced[2] in FWN #146.
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| [1] https://www.redhat.com/archives/libvir-list/2008-October/msg00417.html
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| [2] http://fedoraproject.org/wiki/FWN/Issue146#libvirtd_Multi-threaded_Support_in_the_Works
| | ==== ==== |
| | <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