Question 246823 in Docker Question posted in
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Docker console output as a log, not as a pseudo-GUI

Many Docker commands show something that in the lack of a better word I’d call a "pseudo-GUI" on the console, like for example Docker build. This GUI is staying at the same position on the console and updating live:

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I’d rather like to have a simple stream of output, like it is written by most console applications. Means no control characters, no colors, just writing line after line.

Is there a command option to do so on the Docker CLI?

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Answers


  1. 0

    That’s the default behavior of buildkit. To achieve the desired output, use --progress=plain when building the image:

    $ docker build --progress-plain ...

    or you can disable BUILDKIT altogether for the build:

    $ DOCKER_BUILDKIT=0 docker build ...
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  2. 0

    The change in output format happened because BuildKit is now the default builder in Docker (as of version 23.0).

    You can add --progress=plain to your docker command to have the output stream in a simpler format.

    If you want to set that as the default, you can set the BUILDKIT_PROGRESS environment variable to plain in your shell startup file.

    You can opt out of using BuildKit by setting the environment variable DOCKER_BUILDKIT to 0. Then it’ll use the legacy builder and the output will look like you’re used to. I won’t recommend this though and the legacy builder will likely be removed in a future version of Docker.

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