DevOps and Docker Talk: Cloud Native Interviews and Tooling Docker Environment Configs, Variables, and Entrypoints
Mar 6, 2019
Discover the best practices for managing environment variables in Docker containers. Learn how to separate configuration effectively and address security concerns around sensitive information. Explore various methods for passing variables, including Dockerfile and docker-compose.yml. Delve into practical examples, including a MySQL official image script that securely creates ENV variables from files. Boost your team's development workflow with essential Docker Compose features.
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Separate Config and Code
- Strictly separate configuration settings from your application's codebase.
- This principle from 12-factor apps simplifies environment management and containerization.
Universality of Environment Variables
- Every OS and system supports environment variables, making them a consistent configuration method.
- This universality simplifies management across diverse applications and platforms like Java, Node.js, and databases.
Middleware for Legacy Apps
- If your application uses YAML, INI, or other config files, write a middleware layer.
- This layer bridges environment variables and application settings, enabling dynamic configuration.