Protecting the Build Secrets

Protecting build secrets, even when using GitLab CI/CD variables, is crucial for maintaining the security of your pipelines. GitLab CI/CD provides a feature called "masked variables" to help prevent secrets from being exposed in logs. Here's how you can use this feature:

Masking Variables

You can mask variables in your .gitlab-ci.yml file by using the CI_JOB_TOKEN predefined variable. This token is automatically set by GitLab and can be used to mask any variable value you want to keep hidden.

For example, if you have a variable named MY_SECRET_KEY, you can use it like this:

my_job:
  script:
    - echo "$MY_SECRET_KEY" # This will expose the secret
    - echo "masked: $CI_JOB_TOKEN" # This will mask the secret

Use Secure Variables

If you want to store secrets securely in GitLab, you can use GitLab CI/CD variables with the "Masked" option enabled. These variables are stored securely and are never exposed in job logs, even if you use them directly in your scripts. To create a secure variable:

• Go to the GitLab project.

• Navigate to Settings > CI/CD > Variables.

• Add a new variable, select the "Masked" checkbox, and provide the value.

• Once you've added a secure variable, you can use it in your .gitlab-ci.yml file without worrying about it being exposed in logs.

Note: Ensure that your job scripts do not inadvertently echo or print sensitive information, even when using masked variables. Double-check your scripts to avoid unintentional exposure of secrets.

Access Control

Limit access to CI/CD variables and logs. Only authorized can view job logs and variables in GitLab. You can configure project-level and group-level access controls to achieve this.