docker / docker/mcp-registry

Unable to use Custom Image Name

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#39 4 comments 2 reactions 0 assignees View on GitHub

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bug
Dominant language
Go
Stars
555
Forks
1.5k
Avg merge
9h 53m
Merged PRs (30d)
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Description

I tried used custom image name with my mcp server e.g. ghcr.io/my-image, I see when IO connect to client e.g. Claude I see the following error

pulling docker images: pulling docker image ghcr.io/my-image: Error response from daemon: error from registry: denied

But I was able to do docker pull ghcr.io/my-image successfully. This is preventing me from testing the server locally before sending the PR. I also tried using imagename mcp/<image> and did task build with same result from the client.

CC: @designcode

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the client connection with the custom image name ghcr.io/my-image and compare it with a direct docker pull, including the mcp/ variant and task build. Trace the image-pulling entry point in the Go project; done means the client can pull and use the custom image without the registry denied error.

Written by the indexing model from the issue text.

Assessment

Tech stack
docker, go
Domain
backend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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