It's 2023. How do I build multiplatform Docker images in my gitlab.com CI pipeline?

GitLab CI/CD
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1

I’ve been trying for literally days to build multiplatform Docker images with buildx in my gitlab.com (SaaS, not self-hosted) CI pipelines & totally failing. I’ve searched the interwebs for answers and nothing works.

Can someone please tell me what the secret incantation should be in my .gitlab-ci.yml file for CI pipelines running on gitlab.com (SaaS, not self-hosted).

  • I’m trying to use docker buildx create --use and it’s failing with the message error: could not create a builder instance with TLS data loaded from environment. Please use docker context create to create a context for current environment and then create a builder instance withdocker buildx create `.

  • Using gitlab.com SaaS

  • Add the CI configuration from .gitlab-ci.yml and other configuration if relevant (e.g. docker-compose.yml)

Relevant job of .gitlab-ci.yml:

push-image:
  stage: push-image
  dependencies:
    - build
  variables:
    DOCKER_TLS_CERTDIR: "/certs"
  image: docker:stable
  services:
    - docker:stable-dind
  before_script:
    - docker info
  script:
    - time docker login -u $CI_REGISTRY_USER -p $CI_JOB_TOKEN $CI_REGISTRY
    - export COMMIT_TAG="$(cat VERSION)"
    - if $(echo "$CI_COMMIT_TAG" | grep -q -E "$FORCE_REGEX"); then export COMMIT_TAG="$COMMIT_TAG-$CI_COMMIT_TAG"; echo "LABEL ci-force=$CI_COMMIT_TAG" >> Dockerfile; fi
    - echo "$COMMIT_TAG"
    - export HIVEMQ_IMAGE_TAG="$(cat Dockerfile | grep -E '\s+as\s+download\s*$' | awk '{ print $2 }')"
    - echo "LABEL commit=$CI_COMMIT_SHA hivemq='$HIVEMQ_IMAGE_TAG'" >> Dockerfile
    - cat Dockerfile
    - export DOCKER_TAG_PREFIX=$CI_REGISTRY/artesion/private/edge/$CI_PROJECT_NAME
    - export DOCKER_TAG=$DOCKER_TAG_PREFIX:$COMMIT_TAG
    - echo $DOCKER_TAG
    - time docker buildx create --use
    - time docker buildx build --platform linux/amd64,linux/arm64 -t $DOCKER_TAG --push .
  rules:
    - if: '$CI_COMMIT_TAG =~ $CI_RULES_PRERELEASE_VERSION_REGEX || $CI_COMMIT_TAG =~ $CI_RULES_GA_RELEASE_VERSION_REGEX || $CI_COMMIT_TAG =~ $CI_RULES_FORCE_REGEX'
  • What troubleshooting steps have you already taken? Can you link to any docs or other resources so we know where you have been?

All over the Internet

2

I’m having this exact problem. Did you find any solution yet?

EDIT: I found the solution in another website, you just need to create the context and use that very same name on buildx create:

- docker context create builder
- docker buildx create builder --use
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