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Story #16447

Updated by Tom Clegg about 1 year ago

We want to improve UX for common workflows like: 
 * Use Workbench2 (and no shell node) to run a workflow that depends on docker images that are available on dockerhub 
 * Build an image from a Dockerfile or git repo, and use that image to run Arvados containers without pushing it to dockerhub 
 * Build an image and share it with other users on your cluster without pushing it to dockerhub 
 * Share a project that contains a workflow execution plus all of the docker images needed to re-run it even after the referenced images on dockerhub/arvados have been updated or removed 

 Outline of tentative implementation strategy 
 * Each cluster has a "docker images" project. Any user with username X can use arv-keepdocker (or a new arvados-client command?) to save docker images in a subproject named X. A container request with container image "arvados:X/Y" will use the image saved in the collection named Y in the subproject named X, subject to usual permissions. 
 * A container request with container image "docker:abc/def" causes Arvados to fetch/update "abc/def" from dockerhub into an arvados collection, and use that collection PDH as the image in the resulting container. 

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