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Images with same name cannot be compared. #74
Description
When loading an image with the same name as an already loaded image, it will be overwritten. I wanted to compare images with the same name built in two different environments, but i had to first use the docker tag command to change the name of one of the images before I exported it.
Activity
omus commentedon Jul 27, 2024
Does using the digest hash work? e.g.
debian@sha256:45f2e735295654f13e3be10da2a6892c708f71a71be845818f6058982761a6d3. You can determine the digest for your images withdocker image ls --digests <image>.Antiz96 commentedon Mar 31, 2026
For what it's worth, this is not a fully satisfactory solution as "renaming" an image with
docker tagwill reflect said rename in the image annotations metadata (inio.containerd.image.name&org.opencontainers.image.ref.name), whichdiffociwill complain about (if not ran with the--semanticflag).See for instance the following
diffocioutput (with the difference being introduced by usingdocker tagto "rename" one of the images with the "-rebuild" suffix, in order to avoid name collision).I tried to find a way to either rename / retag the image while preserving the original annotations metadata or, alternatively, find a way to edit the annotations back to their original value afterwards but I haven't been able to find a solution / workaround for that yet 😕
Note that I'm not implying that this is an issue with
diffoci, I'm aware it's just doing its job here 😛More of a limitation of the Docker / Podman image format I guess.