Limit memory usage of the builder

[vkalach]

Hey everyone!
I was wondering is it possible to limit memory usage of builder's container?
I'm using github self-hosted runner and it looks like with every deploy my builder container consumes more and more memory and finally I receive OOM error and runner crashes.

[nickhammond]

Hey @vkalach,

It doesn't look like it if you're trying to do something like this https://docs.docker.com/build/buildkit/configure/#resource-limiting

Perhaps you could create the buildx instance before running Kamal with that setting and then Kamal would just utilize the newly created buildx instance.

Here's the line that's creating the buildx context via Kamal https://github.com/basecamp/kamal/blob/main/lib/kamal/commands/builder/local.rb#L3

You can pass build args to when the container is actually built but that's for for your actual container https://kamal-deploy.org/docs/configuration/builders/#build-arguments

[vkalach]

I can see how to set a remote builder but what if I want to use my custom local builder? How to set it?
Thanks for your help!

[vkalach]

or you mean that if I would create the instance with exact name kamal will just use it as it would think that it has created it?

[nickhammond]

The latter