How to Use Environment Variables for Secure Api Keys in Jekyll

When building websites with Jekyll, securing your API keys is essential to prevent unauthorized access and protect sensitive data. Using environment variables is a best practice that helps keep your API keys safe and out of your codebase.

What Are Environment Variables?

Environment variables are dynamic values stored outside your code, typically in your server or local machine environment. They allow you to store sensitive information like API keys securely without hardcoding them into your project files.

Setting Up Environment Variables in Jekyll

To use environment variables in Jekyll, follow these steps:

• Define your environment variables in your server or local environment. For example, in Unix-based systems, you can add them to your shell profile.
• Use a plugin like jekyll-environment-variables or access them directly in your code.
• Reference the variables in your Jekyll templates using the ENV object in Liquid.

Using Environment Variables in Your Jekyll Site

Once your environment variables are set, you can access them in your Jekyll templates. For example, to include an API key securely:

{% raw %}{{ site.api_key }}{% endraw %}

And in your _config.yml file, you can set:

defaults:
  -
    scope:
      path: ""
      type: "posts"
    values:
      api_key: "{{ ENV['API_KEY'] }}"

Make sure to set the API_KEY environment variable in your server or local environment before building your site.

Best Practices for Managing API Keys

To keep your API keys secure:

• Never hardcode API keys directly into your codebase.
• Use environment variables for sensitive data.
• Restrict API key permissions to only what is necessary.
• Regularly rotate your API keys.

By following these practices, you can enhance the security of your Jekyll site and protect your API keys from potential threats.