Image ID of Docker Hub tags

Docker Hub
1

Is there some way to find out the Image ID of a tagged image on Docker Hub? I don’t want to pull the image first.

I came across this, when i built some images locally and had to overwrite some existing tags on Docker Hub. I had no way to find out, if I already pushed the updated tag or not, wich left me confused.

2 Likes
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I’ve found a workaround using the docker hub api:

curl https://index.docker.io/v1/repositories/<username>/<repo>/tags

Not the nicest solution but at least it works.

Would be great to have this information included in the UI somewhere

2 Likes
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great! I think it could be a interesting feature to add in docker client, for other hand,
maybe @kencochrane is considering this feature

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curl https://index.docker.io/v1/repositories/<username>/<repo>/tags/<tag>/

Now seems to return a json array whereas in my private registry running v0.6.9 it returns a string. When was this change made?

curl https://index.docker.io/v1/repositories/<username>/<repo>/tags/

Now returns a 404

It doesn’t seem to be documented in the API here: https://docs.docker.com/reference/api/hub_registry_spec/#get-all-tags