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= Feature Name = | = Feature Name = | ||
GRUB2 | GRUB2 | ||
| Line 13: | Line 14: | ||
== Current status == | == Current status == | ||
* Targeted release: | * Targeted release: 16 | ||
* Last updated: | * Last updated: 8/10/2011 | ||
* Percentage of completion: | * Percentage of completion: 85% | ||
http://koji.fedoraproject.org/koji/buildinfo?buildID=242356 | |||
At least probably 10% of this feature is creating and updating the packages to reflect changes in http://ftp.gnu.org/gnu/grub/. | |||
== Detailed Description == | == Detailed Description == | ||
We currently use what is essentially a fork of GRUB 0.9x in Fedora for a variety of historical reasons. It would be nice to get back to the upstream developed version, even though it is in many ways an entirely new project. | We currently use what is essentially a fork of GRUB 0.9x in Fedora for a variety of historical reasons. It would be nice to get back to the upstream developed version, even though it is in many ways an entirely new project. | ||
GRUB2 | GRUB2 has reached version 1.99 (equivalent to r.c. 3). The upstream wiki can be found at http://grub.enbug.org/ (This was down for me so http://www.gnu.org/software/grub/.) | ||
== Benefit to Fedora == | == Benefit to Fedora == | ||
There could be new functionality, but that's currently less of the driver. | |||
There could | |||
***---*** | ***---*** | ||
Grub (legacy) is no longer supported. Patches are not accepted. Grub2 is also nearing a stable release ( | Grub (legacy) is no longer supported. Patches are not accepted. Grub2 is also nearing a stable release (14-May-2011 GRUB 1.99) which is something that Grub (legacy) never reached. | ||
== Scope == | == Scope == | ||
| Line 55: | Line 56: | ||
* Auto-detection of Windows and adding it to the config file | * Auto-detection of Windows and adding it to the config file | ||
* Can we ship the unifont ? | * Can we ship the unifont ? | ||
* support for multiple initrds | |||
** Also, as I had it "built", the font wasn't quite right | ** Also, as I had it "built", the font wasn't quite right | ||
* Ensuring all the other features we have and care about are present (if someone wants to make a list of these, it would be helpful) | * Ensuring all the other features we have and care about are present (if someone wants to make a list of these, it would be helpful) | ||
| Line 91: | Line 93: | ||
=== From a DVD with Anaconda === | === From a DVD with Anaconda === | ||
An install DVD can be used to install or repair grub, after setting up a working chroot of your filesystems. From a root console: | |||
#make a directory to work in: | |||
<code><nowiki>mkdir /mnt/sysimage</nowiki></code> | |||
#mount your filesystems (device nodes are examples, be sure to fill in your own!): | |||
<code><nowiki>mount /dev/sda2 /mnt/sysimage</nowiki></code> | |||
<code><nowiki>mount /dev/sda1 /mnt/sysimage/boot</nowiki></code> | |||
#bind mount your system filesystems: | |||
<code><nowiki>mount --bind /dev /mnt/sysimage/dev</nowiki></code> | |||
<code><nowiki>mount --bind /proc /mnt/sysimage/proc</nowiki></code> | |||
<code><nowiki>mount --bind /sys /mnt/sysimage/sys</nowiki></code> | |||
#enter your chroot | |||
<code><nowiki>chroot /mnt/sysimage/</nowiki></code> | |||
You should now be able to install grub2 to your device without interference from the temporary system. | |||
<!-- This does not need to be a full-fledged document. Describe the dimensions of tests that this | <!-- 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. | 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. | ||
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3. What are the expected results of those actions? | 3. What are the expected results of those actions? | ||
--> | --> | ||
Test matrix here: https://fedoraproject.org/wiki/User:Pjones/Grub2TestMatrix | |||
== User Experience == | == User Experience == | ||
| Line 123: | Line 145: | ||
<!-- 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. --> | ||
Fedora switched from grub legacy to grub2 in Fedora 16. Grub 2 allows better configuration options, better support for non x86 architectures, scripting and localization support. | |||
Grub 2 has new configuration format and and files. Please consult the grub manual for more information. | |||
== Comments and Discussion == | == Comments and Discussion == | ||
* See [[Talk:Features/Grub2]] <!-- This adds a link to the "discussion" tab associated with your page. This provides the ability to have ongoing comments or conversation without bogging down the main feature page --> | * See [[Talk:Features/Grub2]] <!-- This adds a link to the "discussion" tab associated with your page. This provides the ability to have ongoing comments or conversation without bogging down the main feature page --> | ||
* [http://en.gentoo-wiki.com/wiki/Grub2 http://en.gentoo-wiki.com/wiki/Grub2] | |||
* [https://help.ubuntu.com/community/Grub2 https://help.ubuntu.com/community/Grub2] | |||
* [http://wiki.debian.org/Grub http://wiki.debian.org/Grub] | |||
* [http://en.opensuse.org/GRUB http://en.opensuse.org/GRUB] | |||
* [https://wiki.archlinux.org/index.php/GRUB2 https://wiki.archlinux.org/index.php/GRUB2] | |||
* [http://www.dedoimedo.com/computers/grub-2.html GRUB 2 bootloader-Full tutorial] | |||
* [http://en.wikipedia.org/wiki/GNU_GRUB wikipedia-GRUB] | |||
[[Category: | [[Category:FeatureAcceptedF16]] | ||
<!-- 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 --> | ||
Latest revision as of 00:04, 7 March 2012
Feature Name
GRUB2
Summary
THIS IS VERY VERY EARLY STAGE
This is very early stage, but I'm trying to document the progress here rather than just locally
Switch to using grub2 instead of grub legacy for boot loading an installed x86 system
Owner
- Name: Peter Jones
Current status
- Targeted release: 16
- Last updated: 8/10/2011
- Percentage of completion: 85%
http://koji.fedoraproject.org/koji/buildinfo?buildID=242356 At least probably 10% of this feature is creating and updating the packages to reflect changes in http://ftp.gnu.org/gnu/grub/.
Detailed Description
We currently use what is essentially a fork of GRUB 0.9x in Fedora for a variety of historical reasons. It would be nice to get back to the upstream developed version, even though it is in many ways an entirely new project.
GRUB2 has reached version 1.99 (equivalent to r.c. 3). The upstream wiki can be found at http://grub.enbug.org/ (This was down for me so http://www.gnu.org/software/grub/.)
Benefit to Fedora
There could be new functionality, but that's currently less of the driver.
- ---***
Grub (legacy) is no longer supported. Patches are not accepted. Grub2 is also nearing a stable release (14-May-2011 GRUB 1.99) which is something that Grub (legacy) never reached.
Scope
The changes are somewhat localized, but there's a lot to be done. The current status based on the testing I've done so far.
What Currently Works
- MBR Bios booting as chainloaded from grub1 works
- Booting from the MBR works
- Graphics mode works
- You have to have freetype2-devel installed and build with --enable-mkfont
- Also had to grab the unifont from http://unifoundry.com/unifont.html
- Simple hacked up module to load a background image is okay. Could certainly be made better
- Creating /usr/local/etc/defaults/grub (would be /etc, but prefix=/usr/local) allowed me to set the following
- default timeout, default distro name, default to graphics mode
- some of this is lame and should get auto-detected (eg, parse /etc/system-release)
Things that still have to be tested/worked on
- EFI mode
- passwords -- Debian and Ubuntu are working on this upstream as of 8 July
- hidden menu support that we use for flicker-less boot
- serial terminal support (with the timeouts)
- bootonce
- Always adding single user entry is not so good -- set GRUB_DISABLE_LINUX_RECOVERY in /etc/default/grub
- Chainloading various versions of Windows
- Auto-detection of Windows and adding it to the config file
- Can we ship the unifont ?
- support for multiple initrds
- Also, as I had it "built", the font wasn't quite right
- Ensuring all the other features we have and care about are present (if someone wants to make a list of these, it would be helpful)
- Documentation, documentation, documentation...
External things that would need work
- anaconda needs to be able to create the new file. Or at least run grub-mkconf
- grubby to update. Or phase out for grub-updconf?
How To Test
It is very easy to test from Grub Legacy type environment, but we will also need to test from Anaconda/Firstinstall.
From an Installed System with Grub Legacy
This was adapted from http://en.gentoo-wiki.com/wiki/Grub2
The following will automatically generate a GRUB2 configuration file including kernels images within your /boot folder, using the auto configuration scripts in /etc/grub.d, the -o specifices an output file, here the default, /boot/grub2/grub.cfg:
grub2-mkconfig -o /boot/grub2/grub.cfg
Testing With Chain Loading
GRUB2 includes a boot image that's loadable from GRUB Legacy, so you can try it out without wiping out your existing, working MBR. To set up GRUB2 without actually writing to the MBR, run
grub2-install --grub-setup=/bin/true /dev/sda
Writing to the MBR
If that works, you can go on testing to writing to your MBR. Same steps as above, but don't tell grub to run the dummy setup program /bin/true
grub2-install /dev/sda
Congratulations! You've reached the point of no return! If you can't boot now you will need to run a rescue CD
From a DVD with Anaconda
An install DVD can be used to install or repair grub, after setting up a working chroot of your filesystems. From a root console:
- make a directory to work in:
mkdir /mnt/sysimage
- mount your filesystems (device nodes are examples, be sure to fill in your own!):
mount /dev/sda2 /mnt/sysimage
mount /dev/sda1 /mnt/sysimage/boot
- bind mount your system filesystems:
mount --bind /dev /mnt/sysimage/dev
mount --bind /proc /mnt/sysimage/proc
mount --bind /sys /mnt/sysimage/sys
- enter your chroot
chroot /mnt/sysimage/
You should now be able to install grub2 to your device without interference from the temporary system.
Test matrix here: https://fedoraproject.org/wiki/User:Pjones/Grub2TestMatrix
User Experience
Ultimately, the main thing a user could change is the different config file (grub.cfg vs grub.conf) and the different syntax in the config file. During the normal boot process, the idea should be that it's not that noticeable
Dependencies
We'll have to be sure to update anaconda for the new config file format and also deal with things like grubby (which updates boot loader configs)
Contingency Plan
Keep using GRUB legacy
Documentation
- The only docs right now are at the upstream site, but they're slim at best.
Release Notes
Fedora switched from grub legacy to grub2 in Fedora 16. Grub 2 allows better configuration options, better support for non x86 architectures, scripting and localization support. Grub 2 has new configuration format and and files. Please consult the grub manual for more information.
Comments and Discussion
- http://en.gentoo-wiki.com/wiki/Grub2
- https://help.ubuntu.com/community/Grub2
- http://wiki.debian.org/Grub
- http://en.opensuse.org/GRUB
- https://wiki.archlinux.org/index.php/GRUB2
- GRUB 2 bootloader-Full tutorial
- wikipedia-GRUB