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{{tag>docker registry}}

====== Deleting images from private docker registry ======

<wrap em>Your registry has to have set [[https://stackoverflow.com/questions/39801094/how-to-delete-an-image-from-a-private-docker-registry|REGISTRY_STORAGE_DELETE_ENABLED]] variable. </wrap>

  - get all repos <code>
curl -s localhost:52000/v2/_catalog | jq </code>
  - get all tags in repo <code>
curl -s localhost:52000/v2/test/tags/list | jq </code>
  - get digest of test repo with image tagged as test33 <code>
curl -s -I --request HEAD --header "Accept: application/vnd.docker.distribution.manifest.v2+json" localhost:52000/v2/test/manifests/test33 | grep ^Docker-Content-Digest | cut -d: -f2,3</code>

Now you can:

Delete the blob identified by name and digest
  curl --request DELETE --header "Accept: application/vnd.docker.distribution.manifest.v2+json" localhost:52000/v2/test/blobs/<digest>

or 

Delete the manifest or tag
  curl --request DELETE --header "Accept: application/vnd.docker.distribution.manifest.v2+json" localhost:52000/v2/test/manifests/<digest>

<WRAP center round important 60%>
You have to use the hash type in digest like sha256:FEWIoj3242ji...

  curl --request DELETE --header "Accept: application/vnd.docker.distribution.manifest.v2+json" localhost:52000/v2/test/manifests/sha256:FEWIoj3242ji
</WRAP>

However, delete only removes references within the repositories. To recover space you will need to [[https://distribution.github.io/distribution/about/garbage-collection/#run-garbage-collection|garbage collect]]. Example when running registry directly on server:

  docker run --rm registry:2 garbage-collect [--dry-run] /etc/docker/registry/config.yml

Example when running registry as a docker container:

  docker exec -it docker-registry sh # enter container first
  /bin/registry garbage-collect [--dry-run] /etc/docker/registry/config.yml

====== Tested on ======
  * docker registry image 01.2024

====== See also ======
  * [[wiki:private_docker_registry|Private docker registry]]
====== References ======
  * https://github.com/distribution/distribution/issues/1579
  * https://distribution.github.io/distribution/spec/api/
  * https://stackoverflow.com/questions/39801094/how-to-delete-an-image-from-a-private-docker-registry