fix: from NetworkRxBytes. PVIOStats will include Namespace

Author: zeroc0d3

CHANGELOG.md

@@ -163,6 +163,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **eBPF build constraints**: Restored `//go:build linux` and `//go:build !linux` constraints to all 9 eBPF package files after bulk header replacement had stripped them
   - `types.go`, `gen.go`, `loader.go`, `helpers.go`, `config_linux.go`, `linux.go`, `hubble_linux.go` → `//go:build linux`
   - `linux_other.go`, `hubble_other.go` → `//go:build !linux`
+- **Node network rx drop not synced** (`internal/collector/kubernetes/nodes.go`): `NodeState.NetworkRxDrop` field was declared but never populated during collection — now assigned from `totalRxDrop` alongside `NetworkRxBytes` and `NetworkTxBytes` in the Kubelet summary scrape loop
+- **PV I/O stats missing namespace** (`internal/collector/kubernetes/storage.go`): `PVIOStats` now includes `Namespace` from the PV's `ClaimRef`, enabling the platform backend to filter and group PV I/O data per namespace in dashboards and alerting rules
 
 ### Changed
 
@@ -171,6 +173,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **All config files updated** (`configs/`, `deploy/`): Added extended K8s metrics fields (`apiserver_metrics`, `coredns_metrics`, `container_extended_metrics`, `pv_io_stats`) to all config variants — `configs/tfo-agent.yaml`, `configs/tfo-agent.default.yaml`, `configs/tfo-agent-one-for-all.yaml`, `deploy/helm/values.yaml`, `deploy/helm/values-one-for-all.yaml`, `deploy/kubernetes/configmap.yaml`
 - **K8s config**: Added `network_policies: true` to all config files under `collectors.kubernetes`
 - **`ClusterState` type**: Added `NetworkPolicies []NetworkPolicyState` field for platform sync
+- **`NodeState` type**: Added `NetworkRxDrop *uint64` field for cumulative network receive drops/errors from Kubelet summary
+- **`PVIOStats` type**: Added `Namespace string` field sourced from PV ClaimRef for per-namespace filtering
 - **RBAC ClusterRole**: Added `networkpolicies` (networking.k8s.io) resource permission for NetworkPolicy collector
 
 ### Dependencies

internal/collector/kubernetes/nodes.go

@@ -269,6 +269,7 @@ func collectNodes(
 					}
 					state.NetworkRxBytes = &totalRx
 					state.NetworkTxBytes = &totalTx
+					state.NetworkRxDrop = &totalRxDrop
 					totalIO := totalRx + totalTx
 					metrics = append(metrics,
 						collector.NewMetric("k8s.node.network.io", float64(totalIO), collector.MetricTypeGauge).

internal/collector/kubernetes/storage.go

@@ -371,7 +371,7 @@ func buildPVIOStats(pvStates []PVState, pvcData []pvcVolumeData) []PVIOStats {
 		if !ok {
 			continue
 		}
-		stat := PVIOStats{PVName: pv.Name}
+		stat := PVIOStats{PVName: pv.Name, Namespace: pv.ClaimRef.Namespace}
 		stat.UsedBytes = pd.usedBytes
 		stat.CapacityBytes = pd.capacityBytes
 		stat.AvailableBytes = pd.availableBytes

internal/collector/kubernetes/types.go

@@ -144,6 +144,7 @@ type ClusterState struct {
 // The agent maps PVC volume usage data to the corresponding PV name using ClaimRef.
 type PVIOStats struct {
 	PVName         string `json:"pv_name"`
+	Namespace      string `json:"namespace,omitempty"`
 	UsedBytes      *int64 `json:"used_bytes,omitempty"`
 	CapacityBytes  *int64 `json:"capacity_bytes,omitempty"`
 	InodesUsed     *int64 `json:"inodes_used,omitempty"`
@@ -223,6 +224,7 @@ type NodeState struct {
 	ImageFSCapacityBytes        *uint64           `json:"image_fs_capacity_bytes,omitempty"`  // container image fs capacity (Kubelet summary)
 	NetworkRxBytes              *uint64           `json:"network_rx_bytes,omitempty"`         // cumulative network rx bytes (Kubelet summary)
 	NetworkTxBytes              *uint64           `json:"network_tx_bytes,omitempty"`         // cumulative network tx bytes (Kubelet summary)
+	NetworkRxDrop               *uint64           `json:"network_rx_drop,omitempty"`          // cumulative network rx drops/errors (Kubelet summary)
 	InternalIP                  string            `json:"internal_ip,omitempty"`
 	ExternalIP                  string            `json:"external_ip,omitempty"`
 	Taints                      []TaintState      `json:"taints,omitempty"`