chore(base-cluster/monitoring): migrate oauth2-proxy away from bitnami

[cwrau]

Summary by CodeRabbit

• Chores
  • Updated the oauth2-proxy Helm chart to a new repository with a newer version.
  • Enhanced monitoring and security configurations, including service account and pod security settings.
  • Improved ingress and TLS setup for clearer and more flexible management.
  • Refined dependency handling and metrics service integration.

[coderabbitai]

Walkthrough

The oauth-proxy HelmRelease was updated to use the official oauth2-proxy chart repository, replacing Bitnami. The manifest was restructured to enhance dependency management, ingress, security contexts, service account, and monitoring configurations. The values.yaml added the new oauth2-proxy Helm repository with updated chart version and conditions. Trusted registries were updated to allow quay.io/oauth2-proxy images.

Changes

File(s)	Change Summary
charts/base-cluster/templates/monitoring/kube-prometheus-stack/oauth-proxy.yaml	Replaced Bitnami chart repo with oauth2-proxy; restructured values for image, ingress, pod and container security contexts, service account, pod disruption budget, monitoring, and dependencies.
charts/base-cluster/values.yaml	Removed oauth2-proxy from Bitnami repo; added separate oauth2-proxy repo with updated URL, chart version, and enablement conditions; added grafana-tempo chart to Bitnami repo.
.github/trusted_registries.yaml	Added quay.io/oauth2-proxy repository to trusted registries with all tags allowed.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~15 minutes

Poem

In the cluster’s gentle night,
A proxy hops to newer light—
From Bitnami’s burrow it leaps away,
To oauth2-proxy fields of gray.
With secrets safe and metrics bright,
This rabbit sleeps well tonight! 🐇✨

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📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between ad24b43 and d108b82.

📒 Files selected for processing (3)

• .github/trusted_registries.yaml (1 hunks)
• charts/base-cluster/templates/monitoring/kube-prometheus-stack/oauth-proxy.yaml (2 hunks)
• charts/base-cluster/values.yaml (1 hunks)

✅ Files skipped from review due to trivial changes (1)

• .github/trusted_registries.yaml

🚧 Files skipped from review as they are similar to previous changes (2)

• charts/base-cluster/values.yaml
• charts/base-cluster/templates/monitoring/kube-prometheus-stack/oauth-proxy.yaml

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (3)

• GitHub Check: check licenses
• GitHub Check: lint helm chart (base-cluster)
• GitHub Check: wait-for-checks

✨ Finishing Touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/base-cluster/migrate-oauth2-proxy-away-from-bitnami

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[Copilot]

Pull Request Overview

This PR migrates the oauth2-proxy chart from the Bitnami repository to the official oauth2-proxy repository, updating from version 6.2.13 to 7.14.1. This change is part of a broader initiative to move away from Bitnami dependencies in the base-cluster monitoring configuration.

• Migrated oauth2-proxy chart source from Bitnami to official oauth2-proxy repository
• Updated oauth2-proxy version from 6.2.13 to 7.14.1
• Refactored Helm template configuration to align with new chart structure and API changes

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
charts/base-cluster/values.yaml	Updates chart repository configuration to use official oauth2-proxy source
charts/base-cluster/templates/monitoring/kube-prometheus-stack/oauth-proxy.yaml	Refactors template to accommodate new chart structure and configuration options

[coderabbitai]

Actionable comments posted: 3

♻️ Duplicate comments (2)

charts/base-cluster/templates/monitoring/kube-prometheus-stack/oauth-proxy.yaml (2)

34-36: nameOverride duplicates fullnameOverride
Both keys resolve to the exact same value, which provides no benefit and can cause chart-level naming overrides to behave unexpectedly.
Remove nameOverride unless you intentionally need both.

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67-70: Redundant automountServiceAccountToken when service account creation is disabled

enabled: false prevents any service account object from being rendered, so the automountServiceAccountToken field has no effect and just adds template noise.

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between eec214f and a84cc8a.

📒 Files selected for processing (2)

• charts/base-cluster/templates/monitoring/kube-prometheus-stack/oauth-proxy.yaml (2 hunks)
• charts/base-cluster/values.yaml (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)

• GitHub Check: lint helm chart (base-cluster)
• GitHub Check: wait-for-checks