Go build not working when volume is mounted in Docker

[bene-dt0]

I'm facing a problem when I try to run the docker run command:

docker run -it --volume $(pwd):/project mmdb-from-go:latest /bin/bash

and afterwards the Go build command:

go build && ./mmdb-from-go-blogpost

I need to update the go build command to the following to get it working:

go build -buildvcs=false && ./mmdb-from-go-blogpost

Is this something only I'm having trouble with or is this a general problem?

[horgh]

Do you get an error without -buildvcs=false? Can you show what it is? I'm not able to reproduce an issue.

[bene-dt0]

Yes, the following:

root@85db0eddc1fb:/project# go build && ./mmdb-from-go-blogpost
error obtaining VCS status: exit status 128
	Use -buildvcs=false to disable VCS stamping.

[horgh]

Thank you. I think the issue is the --volume argument. I don't think that is necessary as we copy the files in when building the image in this example code, so removing it is one solution.

I believe what is happening is that with --volume the repo directory is ending up at /project in the container with a different owner than what the container is running as, and git is not allowing commands due to its safe.directory settings. You could test this by running git status in /project in the container. I think it will complain about ownership.

Assuming that is the problem, if you want to keep using the --volume command, in the container you could run this: git config --global --add safe.directory /project. Both git status and go build should then work.