No output from RUN commands

[johnrhunt]

I'm trying to debug changes I've made in the Dockerfile but can't get any output when I run make build

eg:
RUN echo "Hello world"

has no output (although the build process does output the literal line from the Dockerfile itself).

How can I enable output of commands when building?

[sherifabdlnaby]

@johnrhunt This is the Docker BUILDKIT default configuration, you need to pass an environment variable that makes buildkit print out all the logs.

It's BUILDKIT_PROGRESS=plain
so just run

export BUILDKIT_PROGRESS=plain

before building and you shall see all the logs from builds steps.