[PATCH] add capability to install grub2 but not update the MBR

Gene Czarcinski gczarcinski at ec.rr.com
Mon Sep 15 13:26:05 UTC 2014

On 09/15/2014 08:59 AM, Vratislav Podzimek wrote:
> On Mon, 2014-09-15 at 08:54 -0400, Gene Czarcinski wrote:
>> >On 09/15/2014 02:30 AM, Vratislav Podzimek wrote:
>>> > >Where is the kickstart support? Or do you by "Kickstart install" mean
>>> > >installation where both 'ks=...' and 'inst.nombr' are provided as boot
>>> > >options? I think we still need something like 'bootloader --nombr' if
>>> > >this is the right way to go to fix that bug.
>>> > >
>>> > >
>> >I decided to keep things as simple as possible and just have to boot
>> >parameter "nombr" which will apply to any install including kickstart.
>> >I did consider adding code so that like --extlinux, you could specify
>> >--nombr on kickstart's bootloader command.  But, more code is a chance
>> >for additional errors.
>> >
>> >But, if there is a strong desire to have --nombr as another option on
>> >kickstart's bootloader command, I can add it.
> A general policy in the Anaconda installer is that every feature should
> be implemented in kickstart first. That's the most comprehensive and
> feature-complete "installation mode". So please add that code as well.
v1.1 coming "real soon now"

Since you brought up the fact that it is Anaconda Installer policy that 
every feature be implemented in kickstart first, how about my kickstart 
"--reclaim" option for kickstart's btrfs command.

The problem:  When I manually configure the storage layouts on a regular 
gui or live install, one of the things I can do is to delete an existing 
subvolume so that the space and the subvolume's name can be reused.  In 
kickstart, currently I can one create new subvolumes or re-use an 
existing subvolume.  There is also the requirement that the the rootfs 
("/") subvolume always be freshly "formatted".

So, to provide the same capability to kickstart that is available in a 
regular install, I create a "reclaim" patch.  With the patch applied, 
you can specify something like:
          btrfs  /           --subvol  --name=root1  btrfs_vol --reclaim
          btrfs  /home  --subvol  --name=home  btrfs_vol  --noformat

which will result in two subvolume.  The home subvolume is reused 
whereas if the root1 subvolume already exists, it will be deleted and 
then reallocated.



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