How to backup/restore docker image for deployment?

Question

I have an image to be updated with following command before each deployment.

$docker pull myusername/myproject:latest

This command overwrites t

Answer 1

How can I backup this image

Simply use the docker save command. $ docker save myusername/myproject:latest | gzip -c > myproject_img_bak20141103.tgz

You will later be able to restore it with the docker load command. gunzip -c myproject_img_bak20141103.tgz | docker load

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or change it to a different tag locally without committing to networking repository?

Use the docker tag command: $ docker tag myusername/myproject:latest myusername/myproject:bak20141103