How to Use Environment Variables in Docker Compose

Disclaimer/Disclosure: Some of the content was synthetically produced using various Generative AI (artificial intelligence) tools; so, there may be inaccuracies or misleading information present in the video. Please consider this before relying on the content to make any decisions or take any actions etc. If you still have any concerns, please feel free to write them in a comment. Thank you.
---

Summary: Learn how to use environment variables in Docker Compose to manage your Docker container configurations effectively and securely.
---

In modern application development, managing configuration and secrets efficiently is crucial. Environment variables offer a simple yet powerful way to handle these configurations, and Docker Compose provides robust support for incorporating environment variables into your Docker workflows. This guide will walk you through various methods to use environment variables in Docker Compose.

Using Environment Variables in Docker Compose

[[See Video to Reveal this Text or Code Snippet]]

Using .env Files

Create a .env file:

[[See Video to Reveal this Text or Code Snippet]]

[[See Video to Reveal this Text or Code Snippet]]

Overriding Variables at Runtime

You can override environment variables at runtime using the command line. This is useful for temporary overrides and can be done using the -e flag or by exporting variables in your shell session.

Using the -e flag:

[[See Video to Reveal this Text or Code Snippet]]

Exporting in the shell session:

[[See Video to Reveal this Text or Code Snippet]]

Using External Environment Files

[[See Video to Reveal this Text or Code Snippet]]

[[See Video to Reveal this Text or Code Snippet]]

Combining Methods

[[See Video to Reveal this Text or Code Snippet]]

Conclusion