Docker – Downloading docker image for transfer to non-internet-connected machine

dockeroffline-files

I'm working in an office where my laptop is internet-connected, but tightly controlled. I am not allowed to install unauthorized software onto it.

My development workstation is mine to do with as I please, but it does not have an internet connection.

Is there any way for me to download Docker images from the hub as a file that I could then sneaker-net to my dev workstation? Similar to how I can download RPMs or Ruby Gems and burn them to CD? Or is the only way of downloading the images using the 'docker pull' command?

Best Answer

Short: use the save CLI command.

https://docs.docker.com/engine/reference/commandline/save/

You can pull the image on a computer that have access to the internet.

sudo docker pull ubuntu

Then you can save this image to a file

sudo docker save -o ubuntu_image.docker ubuntu

Transfer the file on the offline computer (USB/CD/whatever) and load the image from the file:

sudo docker load -i ubuntu_image.docker

(On older versions this was just docker load image.docker, see comments for more info.)

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