Can I get an image digest without downloading the image?

Question

Similar to the question \"What´s the sha256 code of a docker image?\", I would like to find the digest of a Docker image. I can see the digest when I download an image:

Answer 1

Following up on ByteFlinger's suggestion, which did not have an example, I tried this, and this is how to calculate it:

$ docker-ls tag -registry https://myregistry.net:5000 
spicysomtam/zookeeper:latest
requesting manifest . done
repository: spicysomtam/zookeeper
tagName: latest
digest: sha256:bd5dd80253171e4dffccbea7c639c90a63d5424aa2d7fe655aea766405c83036

$ curl -ns -H "Accept: 
application/vnd.docker.distribution.manifest.v2+json" -X GET  
https://myregistry.net:5000/v2/spicysomtam/zookeeper/manifests/latest|sha256sum
bd5dd80253171e4dffccbea7c639c90a63d5424aa2d7fe655aea766405c83036  -

$ docker images --digests |grep zookeeper
myregistry.net:5000/spicysomtam/zookeeper           latest                                     sha256:bd5dd80253171e4dffccbea7c639c90a63d5424aa2d7fe655aea766405c83036   a983e71ca22d        29 hours ago        584MB