How do I copy some log files from container to the host while running docker build
from commands under Dockerfile
? As soon as the build fails the building container disappear.
One way is to after every RUN command swallow the non-zero exit code, output the logs to the STDOUT and then re-push the original exit code. But it doesn't seem to scale up, like if we want to copy a whole directory, we won't be zipping and outputting that to console :P
Is there any possible potential solution? Maybe connecting a file from host to container or mounting a directory under build process?