Problems building an OCI container image

[Guenther Meyer <g.meyer@signum-media.de>]

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Hi,

I am trying to build some OCI-containers, but there are some things that are 
not really clear to me:

Issue one: When I build my container image, these are the resulting files:

example-container-qemux86-64.testdata.json -> example-container-
qemux86-64-20221108152401.testdata.json
example-container-qemux86-64-20221108152401.testdata.json
example-container-qemux86-64.manifest -> example-container-
qemux86-64-20221108152401.rootfs.manifest
example-container-qemux86-64-20221108152401.rootfs.manifest
example-container-qemux86-64.qemuboot.conf -> example-container-
qemux86-64-20221108152401.qemuboot.conf
example-container-qemux86-64-20221108152401.qemuboot.conf
example-container-qemux86-64-20221108152401.rootfs.tar.bz2
example-container-qemux86-64.tar.bz2 -> example-container-
qemux86-64-20221108152401.rootfs.tar.bz2
example-container-qemux86-64-20221108152401.rootfs-oci
example-container-qemux86-64-20221108152401.rootfs-oci.tar

So the question is, why are there only stable symlinks for some of the files 
and not for the rootfs-oci files? How can this be changed?


The second issue is the resulting tar-file. I thought, I could directly load it 
as an image, but that results in an error.
Investigating the content of the archive, I found, that the necessary content 
like index.json, oci-layout ad blob/* is not on the root level but inside a 
subfolder "example-container-qemux86-64-20221108152401.rootfs-oci/".

Is that intentional, if yes, why?
Because when I create an archive with the same files on the root level, it can 
directly be used with podman or other tools.


Issue number three:
Maybe this is not directly related, but I'm fairly new into this container 
stuff, so forgive me, if I'm wrong:
If I want to use a predeployed image with k3s, what is the name of the image 
that I have to use in the deployment yaml? Is it just the filename or is it 
something else? If the latter, how do I set the image name during the build?

Cheers,
Guenther

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