envsubst

envsubst < cluster-config.yaml | eksctl create cluster -f - 

• https://aws.amazon.com/blogs/containers/start-pods-faster-by-prefetching-images/

• gettext, envsubst
• Variables: Environment variables, env, env-cmd, .env/, SHELL, PS1, HOME, $?, PATH, HISTFILE, PWD, LD_LIBRARY_PATH, printenv, getenv, getenv, direnv, AWS cli environmental variables, envsubst, env:, env_file (docker-compose)

https://aws.amazon.com/blogs/containers/start-pods-faster-by-prefetching-images/