GitLab	Source Code + CI/CD	Stores code and manages pipelines
GitLab Runner	CI/CD Agent	Executes pipeline jobs

  Kubernetes

  Helm

  Ingress

  Prometheus/Grafana

  Redis

  Kafka

  GitLab CI + GitLab Runner

  Argo CD (GitOps)

  OpenShift

· Create a GitLab project.

· Register a GitLab Runner.

· Write .gitlab-ci.yml.

· Build Java with Maven.

· Build Next.js with pnpm.

· Build images with Buildah.

· Push images to your local registry.

· Deploy to Kubernetes automatically.

· Use pipeline variables and secrets.