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> Uh, no, you don't ever overwrite a release. You build new versions, test them, deploy them, and if you find a bug along the way, you roll back. No, not reall

• peterwwillis 6y ago
  You absolutely should not ship updates by pulling from an unversioned tag; it's bad for a number of reasons. There's some simple ways to avoid it: # In your CI pipeline, something like this: $ cat Dockerfile ARG release_tag FROM baseimg:${release_tag} # etc; i think the container metadata keeps the base version, or you can store it in the container with a RUN line $ base_version_tag=$(./get-latest-versioned-tag.sh some-docker-repo:my_prefix/my_image:stable) $ new_container_version=$(./make-new-version.sh) $ docker build -t my_img:${new_container_version} --build-arg release_tag=${base_version_tag} Then you run your tests on the new image, maybe do a gradual deployment, and can quickly roll back to the last base image or skip broken versions. Your own container version is always rolling-forward, and you can revert the base image version at any time. If you do this with a specific stable tree (like debian:8-stable or something) you should only get security updates, but if you use :latest, that's a total nightmare.