Update Modules

General Discussions
1

Hello,
i’m currently wrighting on my Bachelor-thesis and Mender is part of it. Therefore i would like to know if it is possible to deploy an Update Module as Update from hosted-Mender to a Client as application update. Or do i need to send a whole Image-Update.
If it is possible to update it as application update, do i need to write my own Update-Module which does this or is there a in-built solution for this case?
I didn’t find anything in the documentation which clearly gives an answer to this question.

Kind Regards
Florian

2

Hi Florian,

if I understand correct you can use the single-file update module to put your custom update module on a device (Single File). But in case of an image update the file will be lost and needs a re-deployment.

Cheers
Ruben

3

Hi @fbaer,

actually I needed a very simliar functionality just recently. You can find the source here, but as @ruben already pointed out: it will be gone after a full rootfs update.

Greetz,
Josef