How to use Docker Build Args and Environment Variables
Containerization is a core part of modern application development, and docker containers have changed how development teams deploy their applications. As part of standard practices of containerization, it is crucial to manage the build arguments and environment variables through proper configuration instead of just hard coding them.
Today, we will discuss docker ARG and ENV variables in detail. We will go through various examples of dockerfile and docker compose for build arguments and env variables. As security is an inevitable part of containerization, we will discuss securing the env parameters and secrets.
ARG and ENV are dockerfile instructions through which you can apply the different configurations. However, both look pretty similar when you look at the dockerfile. Some of the notable differences between these two are below:
Find below a snippet from a dockerfile where you can see two build ARG values, one for the Ubuntu version and the other for the CUDA library version.
