create multiple tag docker image
DockerDocker Problem Overview
How can several tags be attached to one Docker image? Is it possible to create multiple tags using one Dockerfile?
It is possible, somehow; for example docker pull ubuntu will get several images, some of which have multiple tags:
ubuntu 13.10 9f676bd305a4 2 weeks ago 182.1 MB
ubuntu saucy 9f676bd305a4 2 weeks ago 182.1 MB
ubuntu raring eb601b8965b8 2 weeks ago 170.2 MB
ubuntu 13.04 eb601b8965b8 2 weeks ago 170.2 MB
ubuntu 12.10 5ac751e8d623 2 weeks ago 161.4 MB
ubuntu quantal 5ac751e8d623 2 weeks ago 161.4 MB
ubuntu 10.04 9cc9ea5ea540 2 weeks ago 183 MB
ubuntu lucid 9cc9ea5ea540 2 weeks ago 183 MB
ubuntu 12.04 9cd978db300e 2 weeks ago 204.7 MB
ubuntu latest 9cd978db300e 2 weeks ago 204.7 MB
ubuntu precise 9cd978db300e 2 weeks ago 204.7 MB
Docker Solutions
Solution 1 - Docker
Since 1.10 release, you can now add multiple tags at once on build:
docker build -t name1:tag1 -t name1:tag2 -t name2 .
Source: Add ability to add multiple tags with docker build
Official Docker doc: https://docs.docker.com/engine/reference/commandline/build/#tag-an-image--t
Solution 2 - Docker
You can't create tags with Dockerfiles but you can create multiple tags on your images via the command line.
Use this to list your image ids:
$ docker images
Then tag away:
$ docker tag 9f676bd305a4 ubuntu:13.10
$ docker tag 9f676bd305a4 ubuntu:saucy
$ docker tag eb601b8965b8 ubuntu:raring
...
Solution 3 - Docker
How not to do it:
When building an image, you could also tag it this way.
docker build -t ubuntu:14.04 .
Then you build it again with another tag:
docker build -t ubuntu:latest .
If your Dockerfile makes good use of the cache, the same image should come out, and it effectively does the same as retagging the same image. If you do docker images then you will see that they have the same ID.
There's probably a case where this goes wrong though... But like @david-braun said, you can't create tags with Dockerfiles themselves, just with the docker command.