GitLab & DevOps Best Practices

CI/CD automation, cloud integrations, and GitLab configuration guides

GitLab CI/CD Pipeline Structure
Understanding the core components of GitLab pipelines

Pipeline Stages

Build

Compile code, install dependencies

Test

Run unit & integration tests

Security

SAST, DAST, dependency scanning

Package

Build containers, artifacts

Deploy

Release to environments

Key CI/CD Concepts

Jobs

Individual tasks that run scripts. Jobs in the same stage run in parallel.

Parallelizable

Stages

Groups of jobs that run sequentially. All jobs in a stage must complete before the next stage starts.

Sequential

Runners

Agents that execute jobs. Can be shared, group-specific, or project-specific.

Execution Environment

Artifacts

Files generated by jobs that can be downloaded or passed to subsequent stages.

Build Outputs

Best Practices

Fast Feedback

  • Run quick tests early in pipeline
  • Use parallel jobs where possible
  • Cache dependencies between runs
  • Fail fast on critical errors

Reliability

  • Use specific image versions, not :latest
  • Implement retry logic for flaky tests
  • Version lock your dependencies
  • Test pipeline changes in feature branches

Security

  • Never commit secrets to .gitlab-ci.yml
  • Use CI/CD variables for sensitive data
  • Enable secret detection scanning
  • Implement least privilege for runners

Maintainability

  • Use templates for reusable components
  • Keep pipeline configuration DRY
  • Document complex pipeline logic
  • Regular review and cleanup of old jobs