[distrobuilder] How to compile a Centos container image in an Ubuntu environment (Github Action)?

Distrobuilder
1

Since I need some pre-built tools to install into my Centos system, how do I create and package a container image through distrobuilder in an Ubuntu environment?
I tried to build it using

sudo distrobuilder build-incus centos.yaml -o image.release=7 -o image.architecture=amd64 -o image.variant=cloud

but it seems that I can’t run the program:

Error: Error while downloading source: Failed to get release: Failed to find release

By default, it seems that I can only create and package container images on Ubuntu for systems that use apt as a package manager, such as kali.
Are there any examples? I’m a newbie and I’m happy to learn from any success stories.

2

All our images are built on Ubuntu or Debian systems.

We build the standard CentOS 7 image with:

distrobuilder build-incus centos.yaml -o image.serial=20240115_07:08 -o image.architecture=x86_64 -o image.release=7 -o image.variant=default -o packages.manager=yum

So I suspect the issue in your case would have been the image architecture causing the files to not be found on the CentOS servers.

3

You can look at the logs at https://jenkins.linuxcontainers.org/ to see exactly how we call distrobuilder. The same calls can be found in the jenkins/jobs directory of lxc-ci.

4

Thank you very much, I found that I can use -o image.architecture=amd64 only when compiling ubuntu, debian, kali and I have to use -o image.architecture=x86_64 when compiling other images such as centos, my problem is solved, thanks for the help!

But this raises another query for me, if I want to compile an image for, say, arm64 architecture, I have to make sure that the host for the compilation is arm64 architecture right? Or can I compile container images for arm64 architecture on amd64 architecture.

5

When I tried to compile archlinux:

distrobuilder build-incus archlinux.yaml -o image.release=current -o image.architecture=x86_64 -o image.variant=cloud -o packages.manager=pacman

I checked https://archive. archlinux.org/iso/ there is no corresponding file, so it caused the error:

Error: Error while downloading source: Failed to download "https://archive.archlinux.org/iso//current/archlinux-bootstrap-current-x86_64.tar.gz": Unable to fetch https://archive.archlinux.org/iso//current/archlinux-bootstrap-current-x86_64.tar.gz: 404 Not Found

May I ask if there is something wrong with what I wrote?

6

You’re trying to build archlinux cloud current on intel 64bit, that matches:
https://jenkins.linuxcontainers.org/job/image-archlinux/architecture=amd64,release=current,variant=cloud/

If you go see the log, you’ll see we run distrobuilder with:

-o image.serial=20240115_04:18 -o image.architecture=x86_64 -o image.variant=cloud

We do not pass a -o image.release

7

Thanks!