feat(monitoring): migrate to kube-prometheus-stack Helm chart
Replace standalone Prometheus/node-exporter/kube-state-metrics with
kube-prometheus-stack Helm chart. Add ServiceMonitor CRDs, PrometheusRule
CRDs (HFT + broker alerts), comprehensive network policies, and wire
AlertManager to Mattermost via incoming webhook.
- Delete old standalone prometheus.yaml, node-exporter.yaml, kube-state-metrics.yaml
- Add prometheus-stack-values.yaml (Helm values with Scaleway Kapsule tuning)
- Add service-monitors.yaml (foxhunt-services + dcgm-exporter ServiceMonitors)
- Add prometheus-rules-hft.yaml and prometheus-rules-broker.yaml (PrometheusRule CRDs)
- Rewrite prometheus network policy for operator-managed pods (DNS, kube-state-metrics,
operator, alertmanager sidecar, monitoring namespace for DCGM)
- Add alertmanager network policy (Mattermost egress)
- Upgrade Grafana: AlertManager datasource, unified alerting, fix nodeSelector
- Fix Tempo: tolerations for GPU nodes, resource tuning
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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