What is CI/CD and what tools have you worked with?

CI/CD (Continuous Integration / Continuous Delivery or Continuous Deployment) is a practice of automating the processes of building, testing, and delivering software.

• Continuous Integration (CI) — regularly integrating changes into a shared repository with automatic build and test runs to quickly identify errors.
• Continuous Delivery (CD) — automating the release of new software versions to testing or staging environments, ready for release.
• Continuous Deployment — automatically releasing changes to production without manual intervention.

Tools commonly used:

• Jenkins — a powerful automation server with many plugins.
• GitLab CI/CD — built-in pipeline tool in GitLab.
• GitHub Actions — automation of workflows directly in GitHub.
• CircleCI, Travis CI — cloud CI/CD services.
• Argo CD, Spinnaker — for managing deployment in Kubernetes.

Example of a simple pipeline in GitLab CI:

stages:
  - build
  - test
  - deploy

build_job:
  stage: build
  script:
    - go build ./...

test_job:
  stage: test
  script:
    - go test ./...

deploy_job:
  stage: deploy
  script:
    - ./deploy.sh
  when: manual

Thus, CI/CD helps improve the quality and speed of development through automation and standardization of processes.