Export Kubernetes cluster metrics to a remote monitoring host

[mattkjames7]

Summary

This branch extends remote monitoring for both memgraph and memgraph-high-availability charts by adding optional Kubernetes cluster metrics scraping to vmagentRemote.

What’s added

• vmagentRemote.kubernetes support in both vmagent templates:
  • optional scrape jobs for kube-state-metrics, node-exporter, and kubelet
  • optional kubelet “additional metrics” scrape path support
• Fail-fast template validation for required Kubernetes scraping settings (targets, API server address, metrics paths).
• Conditional Kubernetes RBAC resources (ServiceAccount, ClusterRole, ClusterRoleBinding) and conditional serviceAccountName usage when Kubernetes scraping is enabled.
• New values schema in both charts:
  • charts/memgraph/values.yaml
  • charts/memgraph-high-availability/values.yaml
• Updated top-level README.md with configuration guidance.
• Added runnable example values files:
  • examples/remote-monitoring/values-standalone-k8s-metrics.yaml
  • examples/remote-monitoring/values-ha-k8s-metrics.yaml

Impact

• Default behavior is unchanged unless vmagentRemote.kubernetes.enabled=true.
• When enabled, vmagent can forward both Memgraph exporter metrics and broader Kubernetes node/workload metrics to the configured remote_write backend.

[Copilot]

Pull request overview

Adds optional Kubernetes infrastructure metrics scraping to the vmagentRemote component in both Memgraph Helm charts, allowing forwarding of kube-state-metrics, node-exporter, and kubelet metrics to a remote_write backend alongside Memgraph exporter metrics.

Changes:

• Introduces vmagentRemote.kubernetes.* values and appends optional Kubernetes scrape jobs to vmagent config.
• Adds conditional RBAC (ServiceAccount/ClusterRole/ClusterRoleBinding) and conditional serviceAccountName usage when Kubernetes scraping is enabled.
• Updates documentation and provides runnable example values for standalone and HA deployments.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 13 comments.

Show a summary per file

File	Description
examples/remote-monitoring/values-standalone-k8s-metrics.yaml	Adds an example enabling remote_write plus Kubernetes scrape jobs (standalone).
examples/remote-monitoring/values-ha-k8s-metrics.yaml	Adds an example enabling remote_write plus Kubernetes scrape jobs (HA).
charts/memgraph/values.yaml	Adds vmagentRemote.kubernetes configuration defaults/options for standalone chart.
charts/memgraph/templates/vmagent.yaml	Appends Kubernetes scrape jobs, validations, and conditional RBAC/SA wiring for standalone chart.
charts/memgraph-high-availability/values.yaml	Adds vmagentRemote.kubernetes configuration defaults/options for HA chart.
charts/memgraph-high-availability/templates/vmagent.yaml	Appends Kubernetes scrape jobs, validations, and conditional RBAC/SA wiring for HA chart.
README.md	Documents how to enable Kubernetes infrastructure scraping with vmagentRemote and links examples.

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[antejavor]

Leaving it to @as51340 for 🟢 since he is the most active operator here.

[as51340]

Merge after fixing CI