Spike: Operator changes for multi-arch

[Maleware]

As an Example, we will spike changes for all operators on the example of Kafka.

As long as the Image-Selection-ADR is not implemented (ISSUE TBD), we will show how we need to change the operator.

For the spike, we gonna change things hard-coded, for a more elaborated GH-Action, the ADR023 must be implemented.

Changes for image dependencies:

• rust/operator/src/kafka_contoller.rs
  • stackable/kafka:{} -> stackable-experimental/kafka:{}
  • stackable/tools: -> stackable-experimental/tools: 2x
  • stackable/edenhill/kcat:1.7.0" -> stackable-experimental/edenhill/kcat:1.7.0"
    For this to work, a multi-arch-image of those dependencies has to present. Therefore we change those paths

Changes in Cargo.toml:

• rust/crd/Cargo.toml
  • OpenSSL: openssl = { version = "0.10.41", features = ["vendored"] }

Makefile:

• Enable buildx in makefile, proposed option:
  docker-build-multi:
docker buildx create --name builder --use
docker buildx build --force-rm --build-arg VERSION=${VERSION} -t "docker.stackable.tech/stackable-experimental/kafka-operator:${VERSION}" -f docker/Dockerfile --platform linux/arm64,linux/amd64 --push .
docker buildx rm builder

Dockerfile:

• stackable/ubi8-rust-builder -> stackable-experimental/ubi8-rust-builder
  For this to work a updated Rust-builder which is already prepared for multi-arch is necessary. At the stackable-experimental repository, there is already the correct one present. This is build as a multi-arch-image and was made from the multi-arch-branch

Working-Branches:

• Kafka: https://github.com/stackabletech/kafka-operator/tree/stackable-experimental
• Rust-Builder: https://github.com/stackabletech/docker-images/tree/ubi8-rust-builder-multi-arch

[vsupalov]

The image selection feature implementation for kafka-operator is being worked on in #482 as part of the ADR implementation stackabletech/operator-rs#470

[vsupalov]

Integrating the new image selection ADR and moving away from a hard-coded tools image is explored in #504

[vsupalov]

The "completed" state of this spike will be a union of:

• the pending ADR changes (Add product image selection struct operator-rs#470) + “reference implementation in kafka-op” ([Merged by Bors] - Implement product image selection #482)
• removing the tools image usage Remove usage of the tools image #504
• the changes to make multi-arch work which are described above and prototyped in the mentioned working branch

[vsupalov]

Retiring this spike, as it is outdated.