Docker开发版/快照

Question

I'm trying to achieve the same mechanism as maven provides for SNAPSHOT versions. Basically, whenever I have a development on a Dockerfile, I want to be able to create temporary versions in my private registry.

I could create a tag and force push on this tag, but I'd rather keep one version in the registry for a given tag.

If Docker image A depends FROM B (on 1.2.SNAPSHOT for instance), then the latest 1.2.x tag will get pulled.

Is there a special keyword in image version that performs what I'm actually trying to achieve ?

Hope this is clear enough :)

Answer 1

I hadn't used them, but it sounds like Maven snapshots are used to indicate a development version. As a result new versions are always checked for and fetched.

To get similar behavior in docker, I believe you'd need to check for a newer base image on each build. That's an option in docker build: --pull

docker build --pull -t myimage .