fix(base-cluster/monitoring): use the correct prometheus datasource id

[cwrau]

Summary by CodeRabbit

• Chores
  • Updated Grafana dashboard configuration for improved data source compatibility.

[Copilot]

Pull Request Overview

This PR fixes the Prometheus datasource identifier in the Grafana dashboard configuration to use the correct lowercase value.

Key Changes:

• Updated the datasource reference from "Prometheus" to "prometheus" in the kubernetes-cluster-monitoring-via-prometheus dashboard configuration

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[coderabbitai]

Walkthrough

A single Grafana dashboard data source reference in the Kubernetes cluster monitoring configuration was updated from uppercase "Prometheus" to lowercase "prometheus" for consistency with the actual data source naming convention.

Changes

Cohort / File(s)	Change Summary
Grafana Configuration charts/base-cluster/templates/monitoring/kube-prometheus-stack/_grafana-config.yaml	Normalized Grafana dashboard data source name for kubernetes-cluster-monitoring-via-prometheus from "Prometheus" to "prometheus" (lowercase)

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested labels

base-cluster

Suggested reviewers

• marvinWolff
• tasches
• teutonet-bot

Poem

🐰 A whisker of a change, so small and neat,
Prometheus now lowercase—oh how sweet!
Case sensitivity fixed with care,
The monitoring stack's beyond compare! ✨

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The PR title "fix(base-cluster/monitoring): use the correct prometheus datasource id" directly and accurately reflects the main change in the pull request. The changeset modifies a Grafana dashboard configuration to update the datasource from "Prometheus" (uppercase) to "prometheus" (lowercase), which is precisely what the title describes. The title is specific, concise, uses conventional commit format, and avoids vague terminology or noise. It provides sufficient context for a developer scanning the history to understand that this is a correction to the datasource identifier in the monitoring configuration.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/base-cluster/prometheus-datasource-id

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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 0a4c774 and ef74153.

📒 Files selected for processing (1)

• charts/base-cluster/templates/monitoring/kube-prometheus-stack/_grafana-config.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). (3)

• GitHub Check: check licenses
• GitHub Check: Update release-please config file for a possibly new chart
• GitHub Check: lint helm chart (base-cluster)

🔇 Additional comments (2)

charts/base-cluster/templates/monitoring/kube-prometheus-stack/_grafana-config.yaml (2)

115-116: Change is correct: datasource ID matches kube-prometheus-stack convention.

The modification updates the datasource reference from uppercase "Prometheus" to lowercase "prometheus" to align with the actual datasource uid used in kube-prometheus-stack's ConfigMap generation. Due to the YAML anchor on line 115 (&dashboard), this change cascades to all dashboards that use the anchor (lines 120, 123, 127, 131, 136, 141, 145, 150, 157, 164, 170, 176, 182), ensuring consistent datasource references across all imported dashboards.

No additional updates are needed; the change is complete and correct.

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1-210: Check for other uppercase "Prometheus" datasource references in related files.

While this file is updated, verify there are no inconsistencies in other Grafana dashboard or datasource provisioning files that might still reference uppercase "Prometheus".

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