CODEWITHSUNDEEP
dockerdocker-compose
kreaves
kreaves

Reputation: 13

docker-compose when loading a tar file

I'm working on a Node/Mongo project in Docker and I'm having some trouble starting it in a certain way.

docker image ls

REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE

projectName          latest              4adabfbf53f9        16 minutes ago      2.99GB

mongo                latest              a0f922b3f0a1        4 days ago          366MB

node                 latest              aa3e171e4e95        2 weeks ago         673MB

I'd like to be able to save these images to a tar file and load them onto another machine. Once they're loaded, running docker-compose up fails with an error about not being able to find a config file.

Is there a way save/load Docker images like this?

Upvotes: 1

Views: 5678

Answers (1)

Jite
Jite

Reputation: 5847

One of the core principles of docker is that the containers should be the same if you remove and start them again. Data that you wish to persist can be stored in separate docker volumes or even on a mounted volume which resides on your disk.

If you have a Dockerfile, can you not just move that to the other computer and build it there, or even use a docker registry like docker hub to store the pre-built image? That's the standard way of doing it.

With that said, it is possible to make changes to a container then commit them to the image so that the image itself is updated. Or you can dump the container directly to a tarball with the export command, but I'm not sure this is actually what you need.

Upvotes: 1

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