CODEWITHSUNDEEP
docker
bythe4mile
bythe4mile

Reputation: 642

Getting the manifest list (fat manifest) from docker registry

While using the docker registry API, I was trying to access the manifest list (aka fat manifest) as described here.

The details of the curl call are: 

curl "https://myserver/v2/<repository>/manifests/<version/" -H "Accept: application/vnd.docker.distribution.manifest.list.v2+json"

However the response for this is with the schemaVersion of 1. An Accept header of application/vnd.docker.distribution.manifest.v2+json does seem to get the correct version of the manifest but doesn't seem to be working for the list type accept header.

Am I missing something in the URL or the headers?

Upvotes: 3

Views: 3879

Answers (1)

Tobias Furuholm
Tobias Furuholm

Reputation: 4817

You need to use the application/vnd.docker.distribution.manifest.list.v2+json header. There is however no guarantee that the registry serves you a manifest list, so you have to be able to handle ordinary image manifests as well.

From the docs:

When pulling images, clients indicate support for this new version of the manifest format by sending the application/vnd.docker.distribution.manifest.v2+json and application/vnd.docker.distribution.manifest.list.v2+json media types in an Accept header when making a request to the manifests endpoint. Updated clients should check the Content-Type header to see whether the manifest returned from the endpoint is in the old format, or is an image manifest or manifest list in the new format.

Upvotes: 1

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