[yocto] ask a question about filesystem in yocto

[Maciej Pijanowski]

On 10.08.2019 09:20, www wrote:
> Dear all,
Hi,
>
> I'm new learner and user of yocto. When I used it, I encountered a 
> problem. I don't know how to resolve it, so I ask for help.
> the problem is how can I create a new partition on yocto? if I have a 
> package named webui, it can be generate several execute files and 
> configuration files, the execute files will be install into 
> filesystem, such as "/usr/bin", and be packed to rofs. but I don't 
> want pack the configuration files  to rofs, and I want create a new 
> image and the image will be a partition of the global image, and pack 
> the configuration file to it, when the system start running, it can be 
> separate    mount to the filesystem.
>
> When pack to rofs image, I don't know how to separate the execute file 
> and configuration file in the webui package and pack to different 
> part. Can someone help me to tell me how to solve this problem?
Please take a look at wic: 
https://www.yoctoproject.org/docs/2.4.2/dev-manual/dev-manual.html#creating-partitioned-images-using-wic

You can for example exclude some subdirectory from main rootfs partition 
and place it onto another partition instead.

Take a look at following wic flags:
--rootfs-dir
--exclude-path

You can define subdirs to split in local.conf or another config file 
(e.g. distro config) using the WIC_CREATE_EXTRA_ARGS
and flags as: --rootfs-dir rootfs-main=${IMAGE_ROOTFS}
>
> I am looking forward to your reply.
>
> thanks，
> Byron
>
>
>
-- 
Maciej Pijanowski
Embedded Systems Engineer
https://3mdeb.com | @3mdeb_com

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