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| {{Anchor|Virtualization}} | | {{Anchor|Virtualization}} |
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| == Virtualization == | | == Virtualization == |
| In this section, we cover discussion of Fedora virtualization technologies on the @et-mgmnt-tools-list, @fedora-xen-list, @libvirt-list and @ovirt-devel-list lists. | | In this section, we cover discussion of Fedora virtualization technologies on the |
| | @fedora-virt list. |
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| Contributing Writer: [[User:Dale | Dale Bewley]] | | Contributing Writer: [[User:Dale | Dale Bewley]] |
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| === Enterprise Management Tools List ===
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| This section contains the discussion happening on the
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| [http://www.redhat.com/mailman/listinfo/et-mgmt-tools et-mgmt-tools list]
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| ==== ====
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| <references />
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| === Fedora Virtualization List === | | === Fedora Virtualization List === |
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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]. |
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| ==== F12 Feature: Host Information ==== | | ==== Virt Status Report ==== |
| [[RichardJones|Richard Jones]] | | [[JustinForbes|Justin Forbes]] |
| posted<ref>http://www.redhat.com/archives/fedora-virt/2009-June/msg00123.html</ref> | | posted<ref>http://www.redhat.com/archives/fedora-virt/2009-December/msg00056.html</ref> a Fedora virtualization status report. |
| an RFC for a feature<ref>http://fedoraproject.org/wiki/Features/Hostinfo</ref> he's working on for [[Releases/12|Fedora 12]].
| | 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. |
| The feature will "Allow a virtual machine to see information and statistics from the
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| host operating system."
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| For example, it will "Allow a virtual machine to look at host information (such as number of
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| physical, not just virtual CPUs), and statistics like the load on the
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| host."
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| [[DanielBerrange|Daniel Berrange]]
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| noted<ref>http://www.redhat.com/archives/fedora-virt/2009-June/msg00130.html</ref>
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| that "a core goal of this
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| hostinfo service is to avoid any use of networking. We don't want to
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| presume that a guest has a NIC, nor that the host has a configured
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| NIC on the same LAN as the guest." So this feature will make use of serial
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| ports to pass queries and responses between the guest and the host.
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| <references /> | | <references /> |
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| ==== libguestfs Super-minimized Appliance ==== | | ==== RHEL and Fedora Virtualization Feature Parity ==== |
| [[RichardJones|Richard Jones]]
| | Robert Day wondered how the virtualization features<ref>http://www.redhat.com/virtualization/rhev/</ref> of Red Hat Enterprise Linux 5.4 |
| created<ref>http://www.redhat.com/archives/fedora-virt/2009-June/msg00118.html</ref>
| | compared to Fedora 12. |
| a set of "very experimental" patches to {{package|libguestfs}}
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| "which allow you to build a so-called 'supermin (super-minimized) appliance'."
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| Within <code>libguestfs</code>, "The normal appliance is a self-contained Linux operating system, based
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| on the Fedora/RHEL/CentOS Linux distro. So it contains a complete
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| copy of all the libraries and programs needed, like kernel, libc,
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| bash, coreutils etc etc."
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| "The supermin appliance removes the kernel and all the executable
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| libraries and programs from the appliance. That just leaves a
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| skeleton of config files and some data files, which is obviously
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| massively smaller than the normal appliance. At runtime we rebuild
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| the appliance on-the-fly from the libraries and programs on the host
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| (eg. pulling in the real /lib/libc.so, the real /bin/bash etc.)"
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| "The new appliance is a mere 500K, so <code>libguestfs</code> RPMs will be a lot
| | [[DanielBerrange|Daniel Berrange]] |
| smaller. Of course that just means they will have many more
| | explained<ref>http://www.redhat.com/archives/fedora-virt/2009-December/msg00040.html</ref> |
| dependencies, so the amount pulled down will be the same or greater."
| | "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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| <references /> | | <references /> |
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| ==== A guest fish in the pipes ====
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| [[RichardJones|Richard Jones]]
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| patched<ref>http://www.redhat.com/archives/fedora-virt/2009-June/msg00177.html</ref>
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| {{package|libguestfs|guestfish}}. "This patch adds support for pipes to guestfish, so you can pipe output
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| from a <code>guestfish</code> command through a command on the host. The canonical
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| example is:
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| ><fs> hexdump /bin/ls | less
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| Another example, looking for root backdoors in the password file:
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| ><fs> cat /etc/passwd | awk -F: '$3 == 0 { print }' | grep -v ^root:
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| Anything right of the first pipe symbol gets passed to the local
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| shell, thus expansion, redirection and so on work on that."
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|
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| | ==== ==== |
| <references /> | | <references /> |
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|
| | | ==== ==== |
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| === Libvirt List === | |
| This section contains the discussion happening on the
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| [http://www.redhat.com/mailman/listinfo/libvir-list libvir-list].
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| ==== Safe PCI Device Passthrough ====
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| [[MirkoRaasch|Mirko Raasch]]
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| asked<ref>http://www.redhat.com/archives/libvir-list/2009-June/msg00516.html</ref>
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| "How can i start my guest with three pci devices passed through and {{package|libvirt}}?" Starting <code>qemu</code> by hand appeared to work.
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| But virsh start produced an error:
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| <pre>
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| libvirtd: 15:44:55.459: warning : pciTrySecondaryBusReset:483 : Other
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| devices on bus with 0000:05:01.0, not doing bus reset
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| </pre>
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| [[DanielBerrange|Daniel Berrange]]
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| recalled<ref>http://www.redhat.com/archives/libvir-list/2009-June/msg00518.html</ref>
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| "what <code>libvirt</code> is complaining about is that there are other devices
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| in the PCI bus which are not associated with this guest, and thus there
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| is no way to safely reset the device you are trying to assign, without
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| endangering the host OS or other guest OS."
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| Adding "when you launch QEMU manually there is no
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| checking for whether the PCI devices are in use by other guests,
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| or by the host OS. So while it may launch QEMU, it is not running
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| safely, and eg, if your guest OS does a PCI bus reset it could
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| kill/harm your host OS."
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| PCI device passthrough is a new feature<ref>http://fedoraproject.org/wiki/Features/KVM_PCI_Device_Assignment</ref> in Fedora 11.
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| <references />
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| ==== VMware ESX driver status update ====
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| [[MatthiasBolte|Matthias Bolte]]
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| continued<ref>http://www.redhat.com/archives/libvir-list/2009-June/msg00469.html</ref> work (FWN #177<ref>http://fedoraproject.org/wiki/FWN/Issue177#Libvirt_VMWare_ESX_Driver_In_Development</ref>) to create a VMware ESX driver for <code>libvirt</code>.
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| Matthias is currently "working on the VMX config to domain XML mapping for
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| dump/create XML" using the VMware Infrastructure API<ref>http://www.vmware.com/support/developer/vc-sdk/visdk25pubs/ReferenceGuide/</ref>.
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| <references /> | | <references /> |
libvirt