Resizing root flash partition/filesystem on first boot

Resizing root flash partition/filesystem on first boot

[Alex J Lennon]

Hi,

I'd like to be able to build an SD card image, deploy to a system and
have it automatically resize on first boot. I haven't seen functionality
that would do this in Yocto. If there is a setting for this could
anybody let me know where that is?

Alternatively if this isn't supported out of the box I was thinking of
adding something, say as a recipe with a post installation task that ran
fdisk, then resizee2fs then either remounted the root f/s if possible or
alternatively rebooted.

I have had a look at this and in a manual hand-rolled way it seems to
work fine.

That said,

e2fsprogs doesn't seem to package resize2fs but I have a small patch to
enable that.

The next problem is that I can automate fdisk with a pipe but when I
delete a partition and create it the default is to start at 1,
overlapping the existing DOS partition that I have on my i.MX6 SD card
images. Odd as I am sure this is different behaviour from what I'd
expect from fdisk on a desktop. I'd have to do some parsing of the
existing partition sizes I guess which I would rather avoid for
simplicity if possible.

If anybody could let me know if this has been done so is a waste of my
time, or if there's a better way to achieve this I'd be grateful.

Thanks,

Alex

Re: Resizing root flash partition/filesystem on first boot

[J. Tang]

On Mar 4, 2015, at 16:32 , Alex J Lennon <ajlennon@dynamicdevices.co.uk> wrote:

> I'd like to be able to build an SD card image, deploy to a system and
> have it automatically resize on first boot. I haven't seen functionality
> that would do this in Yocto. If there is a setting for this could
> anybody let me know where that is?

I wrote a startup script that does exactly this. If you are interested, I can publish the code + BitBake recipe.

-- 
Jason Tang  /  tang@jtang.org

Re: Resizing root flash partition/filesystem on first boot

[Peter Balazovic]

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Hello Jason,

I'm interested in your code + BitBake recipe to be able to *automatically
resize on first boot*.

Thank you.
Peter

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Re: Resizing root flash partition/filesystem on first boot

[Khem Raj]

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> On Oct 12, 2016, at 11:13 PM, Peter Balazovic <balazovic.peter@gmail.com> wrote:
> 
> Hello Jason,
> 
> I'm interested in your code + BitBake recipe to be able to automatically resize on first boot.

Take a look at 96boards layer there is a recipe as well as systemd service file that will be packaged into image

https://github.com/96boards/meta-96boards/blob/master/recipes-bsp/96boards-tools/96boards-tools_0.7.bb <https://github.com/96boards/meta-96boards/blob/master/recipes-bsp/96boards-tools/96boards-tools_0.7.bb>


> 
> Thank you.
> Peter
> --
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