www/content/blog/docker/shell-usage-in-dockerfile.md

title	date	description	tags
Shell usage in dockerfile	2019-02-04	How to use a proper shell in a dockerfile	docker

The problem

The default shell is [“/bin/sh”, “-c”], which doesn't handle pipe fails when chaining commands.

The fix

To process errors when using pipes use this :

SHELL ["/bin/bash", "-eux", "-o", "pipefail", "-c"]

References

• https://bearstech.com/societe/blog/securiser-et-optimiser-notre-liste-des-bonnes-pratiques-liees-aux-dockerfiles/