How can you set up an automated integration and delivery process for three teams within CI/CD?

To set up an automated integration and delivery process (CI/CD) for three teams, the following approaches can be used:

1. Repository or branch separation: Each team can work in a separate repository or in separate branches of one repository.

2. Configuring CI/CD pipelines:

   • Create separate pipelines for each team, which will run when changes are made in the respective branches or repositories.
   • Use tools such as Jenkins, GitLab CI, GitHub Actions, or Azure DevOps.

3. Common and individual stages:

   • Common stages (e.g., building basic components) can be extracted into separate tasks that are reused.
   • Individual stages for each team (testing, deployment) are configured separately.

4. Automating testing and deployment:

   • Set up automatic launching of unit tests and integration tests.
   • Automatic deployment to test environments for each team.

5. Monitoring and notifications:

   • Configure notifications about build and deployment statuses for each team.

6. Overall coordination:

   • Use common coding standards and review processes to avoid conflicts.

Example of a GitLab CI configuration for two teams in one repository:

stages:
  - build
  - test
  - deploy

build_team1:
  stage: build
  script: ./build_team1.sh
  only:
    - team1_branch

test_team1:
  stage: test
  script: ./test_team1.sh
  only:
    - team1_branch

deploy_team1:
  stage: deploy
  script: ./deploy_team1.sh
  only:
    - team1_branch

build_team2:
  stage: build
  script: ./build_team2.sh
  only:
    - team2_branch

# and so on for team 3

Thus, each team has its isolated CI/CD process, but all processes can be centrally managed and monitored.