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UsingFedora35
Asked: 2022-05-08 03:05:25 +0800 CST 2022-05-08 03:05:25 +0800 CST

What arguments should I give instead of -t to my build Dockerfile command?

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I am trying to build a Docker image from a dockerfile command I received from the previous developer:

bash-5.1$ ls
data_collection  demonstrateur.ipynb  demo.py  Dockerfile  examples  README.md  requirements.txt  serious_game  start.py  test
bash-5.1$ docker build -t serious-game:0.0.1 -t serious-game:latest Dockerfile .
"docker build" requires exactly 1 argument.
See 'docker build --help'.

Usage:  docker build [OPTIONS] PATH | URL | -

Build an image from a Dockerfile

I am a complete beginner to docker but why did you put two -t arguments? "-t", this seems to tell the main process inside docker that its input is a terminal device.

docker

2 Answers

  1. Best Answer

    As written in the docs , Docker uses the file named Dockerfile by default. If you want to specify the file you can use the --fileor option -fof the command docker build.

    In my case I can simply use to solve the problem :

    docker build -t serious-game:0.0.1 -t serious-game:latest .

    But to specify another file called TestDockerfile (example for testing):

    docker build -t serious-game:0.0.1 -t serious-game:latest -f TestDockerfile .
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  2. What you say about the terminal is for the subcommand docker run. Each docker subcommand has its own options.

    In the case of docker buildthe option , -tit is to put a "tag" on the resulting image. That is the name by which you can later refer to it (which usually includes a version number).

    From version 1.10 you can repeat the option -tto put more than one "tag" (name).

    Since it gave you an error, that indicates that you have a very old version of docker. I would recommend updating it. However, you can also add tags afterwards. For example:

    $ docker build -t serious-game:0.0.1 Dockerfile .
[...]

$ docker tag serious-game:0.0.1 serious-game:latest

    The first command creates the image with the tag "serious-game:0.0.1" and once the image is created, another tag is assigned with the command docker tag.

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