COSI-33: Add Helm Charts and Update Release Stage to release helm package

[anurag4DSB]

Note to reviewers: Tests for helm coming in next PR
Sample release: 0.1.0-PW.11

Generated using co-pilot:

This PR introduces Helm chart packaging and updates the release pipeline to support multi-platform builds and Helm chart distribution. Key changes include:

1. Added Helm Charts for COSI Driver

   • Introduced a Helm chart for the Scality COSI Driver located in the ./helm/scality-cosi-driver directory.
   • Helm chart is packaged and pushed to GitHub Container Registry (GHCR) as an OCI artifact.

2. Updated Release Pipeline

   • Modified the release stage to:
   • Support multi-platform builds (linux/amd64, linux/arm64).
   • Default to building for linux/amd64 unless the all_platforms input is set to true.
   • Add a Helm chart packaging step to create and upload the chart to GHCR.

3. New GitHub Actions Jobs

   • package-helm-chart: This job packages the Helm chart, uploads it as an artifact, and pushes it to GHCR for distribution.
   • create-github-release: Continues to handle release notes and tagging.

Summary:

•	Added Helm chart for the Scality COSI Driver.
•	Updated release pipeline to handle multi-platform builds and Helm chart packaging.
•	Helm chart is now pushed to GHCR for easy installation and distribution.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.52%. Comparing base (c0f97c6) to head (f5a8ee7).
Report is 7 commits behind head on main.

Additional details and impacted files

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  Coverage   75.52%   75.52%           
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  Files           4        4           
  Lines         237      237           
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  Hits          179      179           
  Misses         51       51           
  Partials        7        7           

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[anurag4DSB]

rebased and pushed

[anurag4DSB]

We will fill this once we have a release, till then we have install-helm.md
I need to add features supported docs

[anurag4DSB]

rebased as merging other PR's review comments.

[fredmnl]

LGTM (M being still a super k8s noob).

We talked in other PRs about the fact that COSI retrieves AK/SK as k8s secrets, I would have expected them to be mentioned in the helm chart, why am I wrong?

[fredmnl]

Aren't show and template kind of redundant? (Since template also shows the chart)

[anurag4DSB]

They actually serve different purpose

• helm template command renders the Helm chart templates into Kubernetes manifest files (YAML), without actually installing the chart in a Kubernetes cluster.
• Test: ensure that the templates are correctly rendered into valid Kubernetes manifests.
• helm show command displays information about a chart, such as its metadata, values, or dependencies. It doesn’t render the chart into manifests like helm template but instead provides insight into the structure of the chart.
• Test: show to check chart details (metadata, values).

helm template is focused on rendering and validating the Kubernetes manifests, which is the primary output of a Helm chart. helm show, on the other hand, is about inspecting the chart’s metadata and configuration options. One would need both to ensure the chart is both well-formed (via helm show) and generates the right manifests (via helm template).

[anurag4DSB]

LGTM (M being still a super k8s noob).

We talked in other PRs about the fact that COSI retrieves AK/SK as k8s secrets, I would have expected them to be mentioned in the helm chart, why am I wrong?

We can further enhance cosi driver by adding that option, and limit one COSI driver to 1 AK/SK, I am open to that.