How to mirror an image from Docker to a private registry

Docker is becoming more and more popular, and if your team is ready to start using Docker, then a private repository is essential, first of all to help you speed up the pull image from the server, and, second, to help you store a private image. This article is about how to open a images backup from a public server to a local private server.

An example of Ubuntu image in index is downloaded from the official Index server .

Docker pull Ubuntu

View existing Images

REPOSITORY	TAG	IMAGE ID	CREATED	VIRTUAL SIZE
Ubuntu	13.10	9f676bd305a4	5 weeks ago	178 MB
Ubuntu	Saucy	9f676bd305a4	5 weeks ago	178 MB
Ubuntu	Raring	Eb601b8965b8	5 weeks ago	166.5 MB
Ubuntu	13.04	Eb601b8965b8	5 weeks ago	166.5 MB
Ubuntu	12.10	5ac751e8d623	5 weeks ago	161 MB
Ubuntu	Quantal	5ac751e8d623	5 weeks ago	161 MB
Ubuntu	10.04	9cc9ea5ea540	5 weeks ago	180.8 MB
Ubuntu	Lucid	9cc9ea5ea540	5 weeks ago	180.8 MB
Ubuntu	12.04	9cd978db300e	5 weeks ago	204.4 MB
Ubuntu	Latest	9cd978db300e	5 weeks ago	204.4 MB
Ubuntu	Precise	9cd978db300e	5 weeks ago	204.4 MB

Generally speaking, we will use the latest version of Ubuntu, you can find multiple tags corresponding to the same image,tag is just a name. tag for image that needs to be push to private registry

Docker tag 9cd978db300e Rd-server:5000/ubuntu

We can perform Docker images viewing effects

REPOSITORY	TAG	IMAGE ID	CREATED	VIRTUAL SIZE
Ubuntu	13.10	9f676bd305a4	5 weeks ago	178 MB
Ubuntu	Saucy	9f676bd305a4	5 weeks ago	178 MB
Ubuntu	Raring	Eb601b8965b8	5 weeks ago	166.5 MB
Ubuntu	13.04	Eb601b8965b8	5 weeks ago	166.5 MB
Ubuntu	12.10	5ac751e8d623	5 weeks ago	161 MB
Ubuntu	Quantal	5ac751e8d623	5 weeks ago	161 MB
Ubuntu	10.04	9cc9ea5ea540	5 weeks ago	180.8 MB
Ubuntu	Lucid	9cc9ea5ea540	5 weeks ago	180.8 MB
Ubuntu	12.04	9cd978db300e	5 weeks ago	204.4 MB
Ubuntu