How to generate a Docker digest from a local image

Asked Aug 04 '20 at 10:10

Active Aug 05 '20 at 13:30

Viewed 464 times

I generated a Docker image locally and once created it appears in docker images --digests but without digest.

REPOSITORY    TAG     DIGEST   IMAGE ID            CREATED             SIZE
exampleimage  local   <none>   e143f92ce9bc        3 minutes ago       146MB

How can I generate a digest for this image without uploading it to a v2 registry ?

I plan to use it in a subsequent script and upload it only if the script succeed.

Thanks.

Edit: Apparently, the digest does not depend of the registry in v2-2 as found here Why digests are different depend on registry? so it should be possible to generate it locally.

edited Aug 05 '20 at 13:30

asked Aug 04 '20 at 10:10

Michée Lengronne

looking for this info as well - did you figure this out? – MaurGi Apr 27 '22 at 21:51
Sadly no. Sorry. – Michée Lengronne Apr 29 '22 at 07:06
I am pushing to the registry and then reading the digest, this seems to work. – MaurGi Apr 30 '22 at 20:43
Yes, but the question is about how to have a digest without pushing to the registry first. – Michée Lengronne May 02 '22 at 16:39

How to generate a Docker digest from a local image

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