From Fedora Project Wiki
< Features
(Created page with "<!-- All fields on this form are required to be accepted by FESCo. We also request that you maintain the same order of sections so that all of the feature pages are uniform. --...") |
No edit summary |
||
| (8 intermediate revisions by 2 users not shown) | |||
| Line 7: | Line 7: | ||
== Summary == | == Summary == | ||
A new storage architecture for KVM based on SCSI | A new storage architecture for KVM based on SCSI. <!-- A sentence or two summarizing what this feature is and what it will do. This information is used for the overall feature summary page for each release. --> | ||
== Owner == | == Owner == | ||
| Line 14: | Line 14: | ||
<!-- Include you email address that you can be reached should people want to contact you about helping with your feature, status is requested, or technical issues need to be resolved--> | <!-- Include you email address that you can be reached should people want to contact you about helping with your feature, status is requested, or technical issues need to be resolved--> | ||
* Email: [mailto:pbonzini@redhat.com] | * Email: [mailto:pbonzini@redhat.com pbonzini@redhat.com] | ||
== Current status == | == Current status == | ||
* Targeted release: [[Releases/17 | Fedora 17 ]] | * Targeted release: [[Releases/17 | Fedora 17 ]] | ||
* Last updated: 2011-07 | * Last updated: 2011-02-07 | ||
* Percentage of completion: | * Percentage of completion: 100% | ||
== Detailed Description == | == Detailed Description == | ||
| Line 28: | Line 28: | ||
== Scope == | == Scope == | ||
The guest driver will be included as part of the distribution's kernel and as part of the seabios ROMs installed together with QEMU. The host drivers will be included in the qemu package. | The guest driver will be included as part of the distribution's kernel and as part of the seabios ROMs installed together with QEMU. The host drivers will be included in the qemu package. For Fedora 17, management tools based on libvirt will not support this yet. <!-- What work do the developers have to accomplish to complete the feature in time for release? Is it a large change affecting many parts of the distribution or is it a very isolated change? What are those changes?--> | ||
== How To Test == | == How To Test == | ||
# Install the qemu-kvm package. | |||
# Download an install image for this release of Fedora (network or DVD). | |||
# Prepare a large file to be used as the disk for a Fedora virtual machine. | |||
# Use the following command to install Fedora: <code>qemu-kvm -drive if=none,id=hd,file=/path/to/test.img -device virtio-scsi-pci,id=scsi --enable-kvm -device scsi-hd,drive=hd -cdrom /path/to/boot.iso</code>. | |||
# Reboot and test that the virtual machine can boot from the virtio-scsi hard disk. | |||
# Use the following command to (re)install Fedora: <code>qemu-kvm -drive if=none,id=cd,file=/path/to/boot.iso -device scsi-cd,drive=cd,bootindex=0 -drive if=none,id=hd,file=/path/to/test.img -device virtio-scsi-pci,id=scsi --enable-kvm -device scsi-hd,drive=hd</code>. The virtual machine will boot from the virtio-scsi image. | |||
<!-- This does not need to be a full-fledged document. Describe the dimensions of tests that this feature is expected to pass when it is done. If it needs to be tested with different hardware or software configurations, indicate them. The more specific you can be, the better the community testing can be. | <!-- This does not need to be a full-fledged document. Describe the dimensions of tests that this feature is expected to pass when it is done. If it needs to be tested with different hardware or software configurations, indicate them. The more specific you can be, the better the community testing can be. | ||
| Line 50: | Line 56: | ||
== Contingency Plan == | == Contingency Plan == | ||
Each piece (kernel, qemu, libvirt) can | Each piece (kernel, qemu, libvirt) can be included separately, so there is no need to revert partial changes. | ||
== Documentation == | == Documentation == | ||
Since libvirt did not make the F17 deadline and documentation was supposed to be there, it still has to be written. <!-- Is there upstream documentation on this feature, or notes you have written yourself? Link to that material here so other interested developers can get involved. --> | |||
== Release Notes == | == Release Notes == | ||
<!-- The Fedora Release Notes inform end-users about what is new in the release. Examples of past release notes are here: http://docs.fedoraproject.org/release-notes/ --> | <!-- The Fedora Release Notes inform end-users about what is new in the release. Examples of past release notes are here: http://docs.fedoraproject.org/release-notes/ --> | ||
<!-- The release notes also help users know how to deal with platform changes such as ABIs/APIs, configuration or data file formats, or upgrade concerns. If there are any such changes involved in this feature, indicate them here. You can also link to upstream documentation if it satisfies this need. This information forms the basis of the release notes edited by the documentation team and shipped with the release. --> | <!-- The release notes also help users know how to deal with platform changes such as ABIs/APIs, configuration or data file formats, or upgrade concerns. If there are any such changes involved in this feature, indicate them here. You can also link to upstream documentation if it satisfies this need. This information forms the basis of the release notes edited by the documentation team and shipped with the release. --> | ||
KVM | KVM supports a new advanced SCSI-based storage stack, virtio-scsi. Right now, virtio-scsi can be used on guests running Fedora 17. It will be included in the mainline kernel starting at release 3.4. | ||
== Comments and Discussion == | == Comments and Discussion == | ||
| Line 64: | Line 70: | ||
[[Category: | [[Category:FeatureAcceptedF17]] | ||
<!-- When your feature page is completed and ready for review --> | <!-- When your feature page is completed and ready for review --> | ||
<!-- remove Category:FeaturePageIncomplete and change it to Category:FeatureReadyForWrangler --> | <!-- remove Category:FeaturePageIncomplete and change it to Category:FeatureReadyForWrangler --> | ||
<!-- After review, the feature wrangler will move your page to Category:FeatureReadyForFesco... if it still needs more work it will move back to Category:FeaturePageIncomplete--> | <!-- After review, the feature wrangler will move your page to Category:FeatureReadyForFesco... if it still needs more work it will move back to Category:FeaturePageIncomplete--> | ||
<!-- A pretty picture of the page category usage is at: https://fedoraproject.org/wiki/Features/Policy/Process --> | <!-- A pretty picture of the page category usage is at: https://fedoraproject.org/wiki/Features/Policy/Process --> | ||
Latest revision as of 07:33, 27 March 2012
virtio-scsi
Summary
A new storage architecture for KVM based on SCSI.
Owner
- Name: Paolo Bonzini
- Email: pbonzini@redhat.com
Current status
- Targeted release: Fedora 17
- Last updated: 2011-02-07
- Percentage of completion: 100%
Detailed Description
virtio-scsi improves the storage stack in terms of scalability (easily overcomes the current limit of ~30 freely hot-pluggable/unpluggable storage devices), flexibility (support features such as SCSI passthrough or persistent reservations), extensibility (exposing new features to the guest does not require updating drivers in both the host and the guest).
Benefit to Fedora
Fedora users will be able to use an industry-standard storage stack for their virtual machines.
Scope
The guest driver will be included as part of the distribution's kernel and as part of the seabios ROMs installed together with QEMU. The host drivers will be included in the qemu package. For Fedora 17, management tools based on libvirt will not support this yet.
How To Test
- Install the qemu-kvm package.
- Download an install image for this release of Fedora (network or DVD).
- Prepare a large file to be used as the disk for a Fedora virtual machine.
- Use the following command to install Fedora:
qemu-kvm -drive if=none,id=hd,file=/path/to/test.img -device virtio-scsi-pci,id=scsi --enable-kvm -device scsi-hd,drive=hd -cdrom /path/to/boot.iso. - Reboot and test that the virtual machine can boot from the virtio-scsi hard disk.
- Use the following command to (re)install Fedora:
qemu-kvm -drive if=none,id=cd,file=/path/to/boot.iso -device scsi-cd,drive=cd,bootindex=0 -drive if=none,id=hd,file=/path/to/test.img -device virtio-scsi-pci,id=scsi --enable-kvm -device scsi-hd,drive=hd. The virtual machine will boot from the virtio-scsi image.
Dependencies
None.
Contingency Plan
Each piece (kernel, qemu, libvirt) can be included separately, so there is no need to revert partial changes.
Documentation
Since libvirt did not make the F17 deadline and documentation was supposed to be there, it still has to be written.
Release Notes
KVM supports a new advanced SCSI-based storage stack, virtio-scsi. Right now, virtio-scsi can be used on guests running Fedora 17. It will be included in the mainline kernel starting at release 3.4.