GitLab & DevOps Best Practices
CI/CD automation, cloud integrations, and GitLab configuration guides
GitLab provides a complete DevOps platform with integrated CI/CD, security scanning, and cloud deployment capabilities.
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.
ParallelizableStages
Groups of jobs that run sequentially. All jobs in a stage must complete before the next stage starts.
SequentialRunners
Agents that execute jobs. Can be shared, group-specific, or project-specific.
Execution EnvironmentArtifacts
Files generated by jobs that can be downloaded or passed to subsequent stages.
Build OutputsBest 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