Docker build

Docker build

Building container image uses services

Use docker:dind for containerized Docker daemon

The GitLab runner must be configured to run privileged container

Alternatives: Rootless and or daeamonless builds using…

• kaniko
• podman/buildah
• BuildKit

Hands-On 1/

Package binary in container image

1. Add Dockerfile to repository
2. Create new stage called package after test

3. Add job package in stage package

    package:
      image: docker:20.10.21
      stage: package
      script:
      - docker build --tag hello .
   

Hands-On 2/2

Package binary in container image

1. Add service to job package

    package:
      services:
      - name: docker:20.10.21-dind
        command: [ "dockerd", "--host", "tcp://0.0.0.0:2375" ]
      #...
   

See new .gitlab-ci.yml:

git checkout origin/160_gitlab_ci/230_docker -- '*'