docker image create and export

https://raw.githubusercontent.com/docker/docker/master/contrib/mkimage-yum.sh或者https://github.com/moby/moby/blob/master/contrib/mkimage-yum.sh

[root@localhost /]# chmod 777 mkimage-yum.sh
[root@localhost /]#./mkimage-yum.sh -y /etc/yum.conf rhel7.7

#docker run -it rhel7.4-mk:7.7.1908 /bin/bash

There are few ways to export/import containers and images.

Export container

docker export container-name | gzip > Zip_File_Name.gz
Import container

zcat Zip_File_Name.gz | docker import - container-name
Docker save container/image in zip file

docker save -o Zip_File_Name.tar container_name
Docker load image from zip file

docker load -i Zip_File_Name.tar