I’d like to be able to capture the output of a docker build task into a log file. I assumed that docker build <arguments> --progress=plain >> docker-build.log would suffice however the resulting file is empty. I’ve tried to see if docker keeps a log file anywhere of the output from builds however …

That’s because the output is not on the standard output but the standard error stream. So you can try this to redirect everything into the file: docker build --no-cache --progress=plain . &> build.log or just redirect standard error if you think there should be some other output to show in the te…

That worked perfectly. Thank you!

Is there extra magic that you need to do on a Mac? I ran docker build \ -t my-image:latest \ -f docker/Dockerfile \ --build-arg SOME_ARG=value \ --target sometarget \ --progress=plain \ . inside a script, and launched the script as my-script.sh 2>&1 > bu…

No magic on Mac. I had three examples, but none of those are what you tried. [image] rimelek: docker build --no-cache --progress=plain . 2>&1 | tee build.log As you can see I used the tee command after a pipe character (|). What you did just redirected the error stream to the standard outpu…

Capture ouput of docker build into a log file?

General

rimelek (Ákos Takács) April 7, 2022, 7:04pm 4

I am glad it helped.

When I came back to see your response I noticed I left the --no-cache option in all of my commands. That option is not required of course. You can remove it.

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Capture ouput of docker build into a log file?

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