## Why
Kubernetes container metrics are entirely missing from VictoriaMetrics, leaving the CNPG dashboard CPU panels empty. The `kubernetes-nodes`/`kubernetes-nodes-cadvisor` scrape jobs use a blanket `labelmap` on `__meta_kubernetes_node_label_(.+)`, copying ~50+ node-feature-discovery labels onto every series; every kubelet/cadvisor series then exceeds vminsert's 40-label default and 100% are silently dropped (`vm_rows_ignored_total{reason="too_many_labels"}` ~38B). On top of that, kube-state-metrics, VMAlert and the kube-prometheus `k8s.rules` recording rules were never deployed, so `node_namespace_pod_container:container_cpu_usage_seconds_total:sum_irate` (and companions) have no producer.
## Changes
- replaces the blanket node-label `labelmap` in both node scrape jobs with a single `__meta_kubernetes_node_name -> node` relabel
- renames the node jobs so series carry `job="kubelet"` plus `metrics_path` (`/metrics` and `/metrics/cadvisor`), matching kube-prometheus selectors; the cadvisor job keeps a distinct `job_name` (uniqueness requirement) and forces `job=kubelet` via relabel
- adds kube-state-metrics v2.20.0 (Deployment, standard ClusterRole/Binding, headless Service, VMServiceScrape with `jobLabel` yielding `job="kube-state-metrics"`), image routed through the artifactapi `k8s-registry` remote
- adds a VMAlert CR (datasource vmselect-main, remoteWrite/remoteRead vminsert/vmselect-main, `notifier.blackhole` since it only evaluates recording rules)
- adds a VMRule with the kube-prometheus `k8s.rules` recording group (cpu sum_irate, memory working_set/rss/cache/swap, namespace requests/limits sums, `kube_pod_owner` workload relabel rules)
## Prerequisite
The artifactapi `k8s-registry` remote exists but its `patterns` allowlist (`^autoscaling/vpa-`, `^external-dns/`, `^sig-storage/`) does not cover `kube-state-metrics/` — terraform-artifactapi needs `^kube-state-metrics/` added to `config/remote_docker/k8s-registry.yaml` before/with this merge, or the KSM pod will ImagePullBackOff.
## Notes
- validated with `kustomize build` (base + au-syd1 overlay) and kubeconform (VM CRD schemas skipped)
- the grafana CNPG dashboard also has stale datasource uids — separate follow-up, deliberately not touched here
Reviewed-on: #399
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>
unkin-agent
e608dadae7