sedenv

reads from stdin and writes to stdout, turns __SOME_TEXT__ into whatever env var $SOME_TEXT is set to.

Useful in Kubernetes to create config files in entrypoint.sh from env vars, if the program won't accept them.

Written in C++ to remove need for runtime dependencies. binary can just be copied into a docker image.

https://github.com/philliptaylorpro/sedenv

example usage in Kubernetes

In your docker file

COPY entrypoint.sh /app/entrypoint.sh
COPY monstache-template.toml /app/monstache-template.toml
COPY sedenv /app/sedenv

ENTRYPOINT /app/entrypoint.sh

In your entrypoint script

sedenv < /app/monstache-template.toml > /app/monstache.toml
monstache -f /monstache-conf/monstache.toml --replay

Now you ensure your Kubernetes deployment.yaml environmental variables can be written into your configs.

compile and build

the binary (linux x86_64) already in git repo and ready to use.

Otherwise you need g++ and make available.

license

This is GPLv2