What are GitLab CI variables and how do they work in different environments?

Can you explain what GitLab CI variables are?

GitLab CI variables are key-value pairs that can be used to customize your CI/CD pipeline. They can store sensitive data, configuration settings, or any other information needed during the build process.

How do I set environment-specific variables in GitLab CI?

You can set environment-specific variables in your .gitlab-ci.yml file under the variables section, or you can define them in the GitLab UI under your project's settings.

What is the difference between predefined and custom variables?

Predefined variables are built-in variables provided by GitLab, like CI_COMMIT_SHA, while custom variables are user-defined and can be tailored to your specific needs.

Can I use variables in my scripts?

Yes, you can reference variables in your scripts using the syntax $VARIABLE_NAME.

Are there any security concerns with using variables?

Yes, be cautious with sensitive data. Use masked variables for secrets to prevent them from being exposed in job logs.