cloudbuild.yaml

# K8s infra build example: https://github.com/kubernetes/test-infra/blob/master/config/jobs/image-pushing/README.md
# GCloud build docs: https://cloud.google.com/cloud-build/docs/build-config
# Builds go to https://console.cloud.google.com/gcr/images/k8s-staging-sig-storage/GLOBAL
# Build logs in https://testgrid.k8s.io/sig-storage-image-build
timeout: 3000s
options:
  substitution_option: 'ALLOW_LOOSE'
  machineType: 'E2_HIGHCPU_8'
substitutions:
  # K8s provides custom substitutions _GIT_TAG and _PULL_BASE_REF:
  #   https://github.com/kubernetes/test-infra/blob/master/config/jobs/image-pushing/README.md#custom-substitutions
  _GIT_TAG: '12345'  # e.g., vYYYYMMDD-hash, vYYYYMMDD-tag, or vYYYYMMDD-tag-n-ghash
  _PULL_BASE_REF: 'master'  # e.g., master or release-0.2 for a PR merge, or v0.2 for a tag
  # COSI substitutions:
  _IMAGE: objectstorage-sidecar
  _PLATFORMS: linux/amd64,linux/arm64 # add more platforms here if desired
steps:
  # based on k8s infra build example and modified to use docker buildx
  # buildx refs: https://github.com/docker/buildx/blob/master/docs/reference/buildx.md
  - id: set-up-multi-arch-builder-as-default
    name: gcr.io/cloud-builders/docker
    args: ["buildx", "create", "--use", "--name", "multi-arch", "--platform=${_PLATFORMS}"]
  - id: bootstrap-multi-arch-builder
    name: gcr.io/cloud-builders/docker
    args: ["buildx", "inspect", "--bootstrap"]
  - id: do-multi-arch-build
    name: gcr.io/cloud-builders/docker
    args:
      - buildx
      - build
      - --push # --load doesn't work with multi-platform builds, so just push from docker build
      - --platform=${_PLATFORMS}
      - --tag=gcr.io/k8s-staging-sig-storage/${_IMAGE}:${_GIT_TAG}
      # using _PULL_BASE_REF as a tag will often just build and overwrite the same 'master' tag,
      # BUT! if the commit has a git tag, it will build that tag instead. this mechanism allows
      # creating the semver-tagged images that will be auto-promoted to release
      - --tag=gcr.io/k8s-staging-sig-storage/${_IMAGE}:${_PULL_BASE_REF}
      - --tag=gcr.io/k8s-staging-sig-storage/${_IMAGE}:latest
      - .