[yocto] Creating multiple filesystem images

[Amol Lad]

Thanks Andre!

That's a gem of an idea. It's working now.

Thanks again


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From: Andre McCurdy <armccurdy at gmail.com>
Sent: Tuesday, 14 August 2018 11:58 PM
To: Amol Lad <Amol.Lad at 4rf.com>
Cc: yocto at yoctoproject.org
Subject: Re: [yocto] Creating multiple filesystem images

On Mon, Aug 13, 2018 at 8:23 AM, Amol Lad <Amol.Lad at 4rf.com> wrote:
> Hi,
>
> Currently when we build say core-image-minimal, we get a root file
> system image (say ext4) after the build. However, I also need to
> create an ext4 image for /boot partition (which contains zImage and
> dtb). I do not want wic image. How I can do this? i.e. I want two ext4
> images after build: one root file system and another with content of
> /boot folder. Please advise

This isn't supported directly. However, if you look in meta/classes/image_types.bbclass -> oe_mkext234fs() you will find the commands which are run for the ext4 image type.

By copying and extending that code, you can define your own custom image type (e.g. "ext4-split") which creates two ext4 images from the rootfs instead of one.