Error in deleting repository in a private registry V2

[joda70]

I would like to know the status of the delete operation implementation in the API v2 of docker registry.
I am able to get information up to manifest reference but when I try the delete operation I obtain:

curl -v --cacert /usr/local/share/ca-certificates/ca.crt -u 'user:pwd' -X GET https://hostname/v2/name/manifests/reference
... (the output report digest information)

curl -v --cacert /usr/local/share/ca-certificates/ca.crt -u 'user:pwd' -X DELETE https://hostname/v2/name/manifests/reference
...

{"errors":[{"code":"UNSUPPORTED","message":"The operation is unsupported."}]}

• Connection #0 to host hostname left intact

[ybshen]

you can try to add REGISTRY_STORAGE_DELETE_ENABLED=true when start the registry

[bhanushrestha]

@ybshen I am sorry if this sounds too simple, but could you please specify how or where do we add that

REGISTRY_STORAGE_DELETE_ENABLED=true
flag when we start the registry. Is it some sort of environment variable or command line flag?

[jheiss]

@bhanushrestha See https://docs.docker.com/registry/configuration/ for details. But yes, REGISTRY_STORAGE_DELETE_ENABLED would be an environment variable that you would pass via the -e flag to docker run.

[Rukeith]

@jheiss Sorry, I might miss. But I didn't found the variables REGISTRY_STORAGE_DELETE_ENABLED in document. There is configuration file.

[jheiss]

The registry accepts configuration settings either via a file or via environment variables. So the environment variable REGISTRY_STORAGE_DELETE_ENABLED=true is equivalent to this in your config file:

storage:
  delete:
    enabled: true

[sosensible]

When I try to add the environment variable into my docker-compose.yaml it never seems to respond.

    environment:
      REGISTRY_STORAGE_DELETE_ENABLED: "true"

Changing it to equals failed as well as changing it to the number 1. It also would not work without quotes for text.

    environment:
      REGISTRY_STORAGE_DELETE_ENABLED: 1

[manishtomar]

@sosensible Did you try deleting image after enabling that environment variable? https://docs.docker.com/registry/spec/api/#deleting-an-image

[romangallego]

I just went through the same issue and want to confirm that the solution suggested about enabling that environment variable in the config file works.
storage:
delete:
enabled: true

[mickours]

When I try to add the environment variable into my docker-compose.yaml it never seems to respond.

    environment:
      REGISTRY_STORAGE_DELETE_ENABLED: "true"

Changing it to equals failed as well as changing it to the number 1. It also would not work without quotes for text.

    environment:
      REGISTRY_STORAGE_DELETE_ENABLED: 1

This is because you are using a map value instead of a list which the correct format for docker compose.

This is the working version:

    environment:
    - REGISTRY_STORAGE_DELETE_ENABLED=true