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CI: BuildKit registry cache + SBOM/provenance attestations for Docker builds #306

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Merged
lencioni merged 2 commits into from
May 11, 2026
+13 −4
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CI: BuildKit registry cache + SBOM/provenance attestations for Docker builds #306

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9efb609
CI: add BuildKit registry cache for Docker builds
lencioni May 11, 2026
ddcc420
CI: address PR review feedback on registry cache security and --pull
lencioni May 11, 2026
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17 changes: 13 additions & 4 deletions .circleci/config.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -6,18 +6,21 @@ jobs:
- image: cimg/base:current

environment:
DOCKER_BUILDKIT: 1
CACHE_REF: enduire/happo-docs:buildcache

steps:
- checkout
- setup_remote_docker:
docker_layer_caching: true
docker_layer_caching: false

- run:
name: Build Docker image
command: |
docker build \
docker buildx create --use --name happo-builder --driver docker-container
docker buildx build \
--progress=plain \
--cache-from "type=registry,ref=${CACHE_REF}" \
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@lencioni lencioni May 11, 2026

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Fair point — the framing in the PR description was wrong. --pull ensures the latest tag, not a reproducible build. Removed --pull from both jobs in ddcc420. If we want actual reproducibility in the future, the right move is pinning the base image to a digest in the Dockerfile.

--load \
--tag happo-test-docs \
-f Dockerfile .

Expand Down Expand Up @@ -115,10 +118,14 @@ jobs:
publish-docker:
docker:
- image: cimg/base:current

environment:
CACHE_REF: enduire/happo-docs:buildcache

steps:
- checkout
- setup_remote_docker:
docker_layer_caching: true
docker_layer_caching: false

- run:
name: Publish Docker image
Expand All @@ -128,6 +135,8 @@ jobs:
docker buildx create --use --name happo-builder --driver docker-container
docker buildx build \
--progress=plain \
--cache-from "type=registry,ref=${CACHE_REF}" \
--cache-to "type=registry,ref=${CACHE_REF},mode=max" \
-t enduire/happo-docs:$IMAGE_TAG \
--attest type=sbom \
--attest type=provenance,mode=max \
Expand Down
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