[yocto] meta-virtualization -> docker not packaged when using PACKAGE_CLASSES ?= "package_deb"

[Mark Junghanns]

Hello,
I encountered a funny behavior the other day. While trying to integrate Docker into my image using the openembedded meta-virtualization layer, I happened to not being able to get my image finalized.

Usually I build with
            PACKAGE_CLASSES ?= "package_deb".

I also added
            DISTRO_FEATURES_append = " virtualization"

The build process aborts at some point within do_rootfs, stating something like that the package 'docker' could not be found. I tracked down the problem to docker's  build/tmp/work/<something>/docker/<version>/deploy-debs/ directory. I found the following packages:

docker-contrib_17.06.0+gite639a70fbe999d96354a5bcf560231b7b8aa935c-r0_amd64.deb
docker-distribution-dev_v2.6.2-r0_amd64.deb
docker-registry_v2.6.2-r0_amd64.deb
docker-dbg_17.06.0+gite639a70fbe999d96354a5bcf560231b7b8aa935c-r0_amd64.deb
docker-distribution-ptest_v2.6.2-r0_amd64.deb
docker-distribution-dbg_v2.6.2-r0_amd64.deb
docker-ptest_17.06.0+gite639a70fbe999d96354a5bcf560231b7b8aa935c-r0_amd64.deb


The package that is actually missing, is the docker package itself. I suppose it would be named docker_17.06.0+gite639a70fbe999d96354a5bcf560231b7b8aa935c-r0_amd64.deb.

There is not any single warning or error thrown whatsoever during the build of docker, it seems to just silently refusing to build the package.

Yet, when change PACKAGE_CLASSES ?= "package_deb" to PACKAGE_CLASSES ?= "package_rpm" it would build all required docker RPM-Packages just fine. At the end of the day I way able to get a complete image with Docker integrated, which is fine for the moment. Unfortunately I need to stick with the DEB format for update reasons, so eventually I need to deal with this issue again.

Has anyone seen this happening as well? Any idea, where and how to fix this?

Thanks in advance for your help!

Mark