Re: [PATCH RFC 2/3] gitlab: build all container images during CI

[Philippe Mathieu-Daudé]

On 6/22/20 5:33 PM, Daniel P. Berrangé wrote:
> We have a number of container images in tests/docker/dockerfiles
> that are intended to provide well defined environments for doing
> test builds. We want our CI system to use these containers too.
> 
> This introduces builds of all of them as the first stage in the
> CI, so that the built containers are available for later build
> jobs. The containers are setup to use the GitLab container
> registry as the cache, so we only pay the penalty of the full
> build when the dockerfiles change. The main qemu-project/qemu
> repo is used as a second cache, so that users forking QEMU will
> see a fast turnaround time on their CI jobs.

OMG you did it! Lovely... 😍

Looking at https://gitlab.com/berrange/qemu/-/pipelines/158854797
why gitlab isn't caching the docker images? the cache isn't
populated on all the runners yet? Or we have to use the same
runner again to hit its cache?

> 
> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
> ---
>  .gitlab-ci.d/containers.yml | 248 ++++++++++++++++++++++++++++++++++++
>  .gitlab-ci.yml              |   3 +
>  2 files changed, 251 insertions(+)
>  create mode 100644 .gitlab-ci.d/containers.yml
> 
> diff --git a/.gitlab-ci.d/containers.yml b/.gitlab-ci.d/containers.yml
> new file mode 100644
> index 0000000000..ea1edbb196
> --- /dev/null
> +++ b/.gitlab-ci.d/containers.yml
> @@ -0,0 +1,248 @@
> +
> +
> +.container_job_template: &container_job_definition
> +  image: docker:stable
> +  stage: containers
> +  services:
> +    - docker:dind
> +  before_script:
> +    - export TAG="$CI_REGISTRY_IMAGE/ci-$NAME:latest"
> +    - export COMMON_TAG="$CI_REGISTRY/qemu-project/qemu/ci-$NAME:latest"
> +    - docker info
> +    - docker login registry.gitlab.com -u "$CI_REGISTRY_USER" -p 
> "$CI_REGISTRY_PASSWORD"
> +  script:
> +    - docker pull "$TAG" || docker pull "$COMMON_TAG" || true
> +    - sed -i -e "s,FROM qemu:,FROM $CI_REGISTRY_IMAGE/ci-," 
> tests/docker/dockerfiles/$NAME.docker
> +    - docker build --cache-from "$TAG" --cache-from "$COMMON_TAG" --tag 
> "$TAG" -f "tests/docker/dockerfiles/$NAME.docker" tests/docker/dockerfiles
> +    - docker push "$TAG"
> +  after_script:
> +    - docker logout
> +
> +amd64-centos7-container:
> +  <<: *container_job_definition
> +  variables:
> +    NAME: centos7
[...]