Docker is a software that combines tools, standards and conventions to be able to

• contain software
• use container in different environments: cloud, bare metal server, vms

The software is abstracted as:

• executable
• ports
• storage
• environment variables

You can transfer a image via a file <myapp>-<version>.tar. After you import the container as a image you can start a new container with specific settings/ports via docker run using the <local/myapp>-<version> as the image tag.

docker export --output="<myapp>-<version>.tar" <container>
docker import <myapp>-<version>.tar <local/myapp>:<version>

See https://medium.com/the-code-review/docker-run-vs-exec-deep-dive-into-their-differences-19a1041735a3

docker run --name test2 --rm -it <image-id> sh

See https://medium.com/the-code-review/docker-run-vs-exec-deep-dive-into-their-differences-19a1041735a3

docker run --name test2 -it <image-id> sh
docker start test2
docker exec -it test2 sh

• install your registry: a heavy process for just one image export/import

• save containers
  • https://docs.docker.com/engine/reference/commandline/import
  • https://docs.docker.com/engine/reference/commandline/export
• save images - https://stackoverflow.com/questions/23935141/how-to-copy-docker-images-from-one-host-to-another-without-via-repository
• https://github.com/sameersbn/docker-gitlab/blob/master/docs/container_registry.md
• https://about.gitlab.com/2016/05/23/gitlab-container-registry/
• https://blog.docker.com/2013/07/how-to-use-your-own-registry/

• https://gist.github.com/bastman/5b57ddb3c11942094f8d0a97d461b430

docker commit <myContainerId> myContainerSnapshot
docker run -it myContainerSnapshot /bin/bash

docker exec -it -u root <myContainerId> bash

docker run -rm -it <image Id|Tag> /bin/sh

• http://blog.thoward37.me/articles/where-are-docker-images-stored/
• https://container.training/intro-fullday.yml.html#7
• https://docker-curriculum.com/ (hi paul)