Buildkit issues

Two setups with different issues.

docker build

docker-build.sh: using docker build with or without DOCKER_BUILDKIT=1

Local build

• DOCKER_BUILDKIT=1 docker build from local image OK
• docker build from local SHA-ID OK
• DOCKER_BUILDKIT=1 docker build from local SHA ID FAIL

Cache

• docker build --cache-from working fine both with local image or SHA ID OK
• DOCKER_BUILDKIT=1 with local image FAIL: moby/moby#39003
• DOCKER_BUILDKIT=1 with SHA ID TBD (not relevant yet)

buildctl

buildctl-build.sh: using buildctl (https://github.com/moby/buildkit)

Local build

• builtctl build from local image FAIL
• tests with SHA-ID TBD (not relevant yet)

Cache

• issues with local cache: moby/moby#39003
• possibly more tests to come