How to copy Docker images from one host to another without using a repository

  • Backup docker image to tar a tar file
    docker save -o <path to image tar file> <image name>
    
  • Copy to another machine
  • Load image from tar file
    docker load -i <path to image tar file>
    

If all machines in the same network, we can use one line commands to do it.

docker save <image> | bzip2 | \
     ssh [email protected] 'bunzip2 | docker load'

if pv command is available, you can also use it to view the transfer status.

docker save <image> | bzip2 | pv | \
     ssh [email protected] 'bunzip2 | docker load'

Reference:
https://stackoverflow.com/questions/23935141/how-to-copy-docker-images-from-one-host-to-another-without-using-a-repository

Written on January 15, 2019