Re: [PATCH 11/11] tests/gitlab: use kaniko to build images

["Daniel P. Berrangé" <berrange@redhat.com>]

On Thu, Mar 30, 2023 at 11:11:41AM +0100, Alex Bennée wrote:
> Apparently the docker-in-docker approach has some flaws including
> needing privileged mode to run and being quite slow. An alternative
> approach is to use Google's kaniko tool. It also works across
> different gitlab executors.
> 
> Following the gitlab example code we drop all the direct docker calls
> and usage of the script and make a direct call to kaniko and hope the
> images are cacheable by others.
> 
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> Message-Id: <20230224180857.1050220-8-alex.bennee@linaro.org>
> 
> ---
> v2
>   - add danpb's --cache suggestions
> ---
>  .gitlab-ci.d/container-template.yml | 22 ++++++++++------------
>  1 file changed, 10 insertions(+), 12 deletions(-)
> 
> diff --git a/.gitlab-ci.d/container-template.yml b/.gitlab-ci.d/container-template.yml
> index 519b8a9482..cd8e0a1ff6 100644
> --- a/.gitlab-ci.d/container-template.yml
> +++ b/.gitlab-ci.d/container-template.yml
> @@ -1,21 +1,19 @@
>  .container_job_template:
>    extends: .base_job_template
> -  image: docker:stable
> +  image:
> +    name: gcr.io/kaniko-project/executor:v1.9.0-debug
> +    entrypoint: [""]
>    stage: containers
> -  services:
> -    - docker:dind
>    before_script:
>      - export TAG="$CI_REGISTRY_IMAGE/qemu/$NAME:latest"
>      - export COMMON_TAG="$CI_REGISTRY/qemu-project/qemu/qemu/$NAME:latest"
> -    - apk add python3
> -    - docker info
> -    - docker login $CI_REGISTRY -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD"
>    script:
>      - echo "TAG:$TAG"
>      - echo "COMMON_TAG:$COMMON_TAG"
> -    - docker build --tag "$TAG" --cache-from "$TAG" --cache-from "$COMMON_TAG"
> -      --build-arg BUILDKIT_INLINE_CACHE=1
> -      -f "tests/docker/dockerfiles/$NAME.docker" "."
> -    - docker push "$TAG"
> -  after_script:
> -    - docker logout
> +    - /kaniko/executor
> +          --reproducible
> +          --context "${CI_PROJECT_DIR}"
> +          --cache=true
> +          --cache-repo "${COMMON_TAG}"

IIRC with docker if we told it to cache we would have to first have done
a  'docker pull $COMMON_TAG' as it wouldn't pull down the image if
it was not already local. I'm fuzzy on whether kaniko has the same
need or not ?  I guess we were broken already in that respect as
we already uses --cache-from with docker without a docker pull

> +          --dockerfile "${CI_PROJECT_DIR}/tests/docker/dockerfiles/$NAME.docker"
> +          --destination "${TAG}"


With regards,
Daniel
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