Enable arm64 builds

[nanu-c]

Classification

Please delete options that are not relevant.

• Feature/Enhancement

Reproducibility

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• Always

Description

The images aren't build for arm64 but our new server is. Can we enable the build of arm64 images

Steps to reproduce

1. Run a arm64 vm and try to start the mailserver

Expected results

Mailserver starts

Actual results

Image not found

[AndrewSav]

I feel this is a hard task that none of the maintainers is likely to take on. If you can get this working, please submit a PR and let's see if we can shepherd it to conclusion. The main obstacle that I see that there are some dependencies that are not available for arm.

[nanu-c]

The mailu mailserver depends on similar components and has an arm64 build and debian has all packages also as arm64. I agree that there is the time constrain of adding support for it and maybe i will look into it, but i see no big obstacles in doing so.

[ksylvan]

If there is still interest in this, I am sure I can make a bit of time and get this done.

@nanu-c @AndrewSav @sknight80 @SaraSmiseth What do you all think?

[SaraSmiseth]

If it is not too much work I think this would be nice. I have a raspberry pi I could try it on.

What needs to be changed is how we get gucci. It is hardcoded to amd64 right now. Maybe other things as well.

https://github.com/mailserver2/debian-mail-overlay/blob/b57d01053c9d2f8fee94f55459d0e7635f7f3e18/Dockerfile#L115

[nanu-c]

In my opinion this is still relevant because the arm64 servers are now cheaper than the intel ones. And the raspberry pi 5 with 8gb ram is also a good target. But at the same time we have switched to mailcow for the same reason.

[AndrewSav]

@ksylvan It is nice to have if you have time for that. I have an RPi too, but I'm not sure if it will actually run on that memory and CPU wise. Happy to test.