I don't want to run anything in a docker container as root. And I want minimalistic images.
I can run my compiled Go app in the scratch-image without a problem. But when I don't want it to run as root (i assume its running as root) and define USER nobody in the dockerfile I get
014/10/25 06:07:10 Error response from daemon: Cannot start container 4822f34e54e20bb580f8cd1d38d7be3c828f28595c2bebad6d827a17b4c2fe21: finalize namespace setup user get supplementary groups Unable to find user nobody
here is my dockerfile
FROM scratch ADD lichtpunkt_go_linux_amd64 /lichtpunkt_go_linux_amd64 ADD web /web USER nobody CMD ["./lichtpunkt_go_linux_amd64"] EXPOSE 3001
turns out that scratch is empty, very empty.
RUN useradd would execute /bin/sh -c useradd but there is no /bin/sh . RUN ["useradd"] would exec directly. but there is no useradd. i d have to add rootfs.tar and build stuff from zero.
i ll use debian as i don't wont to run anything as root within a container because ...