######### docker image save(tar.gz) and load
특정 이미지 downlaod
$ docker pull centos:7.3.1611
받은 이미지를 tar.gz 로 변환
( https://docs.docker.com/engine/reference/commandline/image_save/ )
$ docker image save -o centos7.3.1611.tar.gz centos:7.3.1611
tar.gz 를 load
$ docker image load -i centos7.3.1611.tar.gz
######### docker image save(tar.gz) and load
“Error: open /tmp/docker-import-123456789/repo/bin/json: no such file or directory”
$ cat trac_2016.tar.gz | docker import - trac