Collect k8s endpoints, ingress, and services in kube_inventory plugin (#6105)

plugins/inputs/kube_inventory/endpoint.go

@@ -0,0 +1,82 @@
+package kube_inventory
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"github.com/ericchiang/k8s/apis/core/v1"
+
+	"github.com/influxdata/telegraf"
+)
+
+func collectEndpoints(ctx context.Context, acc telegraf.Accumulator, ki *KubernetesInventory) {
+	list, err := ki.client.getEndpoints(ctx)
+	if err != nil {
+		acc.AddError(err)
+		return
+	}
+	for _, i := range list.Items {
+		if err = ki.gatherEndpoint(*i, acc); err != nil {
+			acc.AddError(err)
+			return
+		}
+	}
+}
+
+func (ki *KubernetesInventory) gatherEndpoint(e v1.Endpoints, acc telegraf.Accumulator) error {
+	if e.Metadata.CreationTimestamp.GetSeconds() == 0 && e.Metadata.CreationTimestamp.GetNanos() == 0 {
+		return nil
+	}
+
+	fields := map[string]interface{}{
+		"created":    time.Unix(e.Metadata.CreationTimestamp.GetSeconds(), int64(e.Metadata.CreationTimestamp.GetNanos())).UnixNano(),
+		"generation": e.Metadata.GetGeneration(),
+	}
+
+	tags := map[string]string{
+		"endpoint_name": e.Metadata.GetName(),
+		"namespace":     e.Metadata.GetNamespace(),
+	}
+
+	for _, endpoint := range e.GetSubsets() {
+		for _, readyAddr := range endpoint.GetAddresses() {
+			fields["ready"] = true
+
+			tags["hostname"] = readyAddr.GetHostname()
+			tags["node_name"] = readyAddr.GetNodeName()
+			if readyAddr.TargetRef != nil {
+				tags[strings.ToLower(readyAddr.GetTargetRef().GetKind())] = readyAddr.GetTargetRef().GetName()
+			}
+
+			for _, port := range endpoint.GetPorts() {
+				fields["port"] = port.GetPort()
+
+				tags["port_name"] = port.GetName()
+				tags["port_protocol"] = port.GetProtocol()
+
+				acc.AddFields(endpointMeasurement, fields, tags)
+			}
+		}
+		for _, notReadyAddr := range endpoint.GetNotReadyAddresses() {
+			fields["ready"] = false
+
+			tags["hostname"] = notReadyAddr.GetHostname()
+			tags["node_name"] = notReadyAddr.GetNodeName()
+			if notReadyAddr.TargetRef != nil {
+				tags[strings.ToLower(notReadyAddr.GetTargetRef().GetKind())] = notReadyAddr.GetTargetRef().GetName()
+			}
+
+			for _, port := range endpoint.GetPorts() {
+				fields["port"] = port.GetPort()
+
+				tags["port_name"] = port.GetName()
+				tags["port_protocol"] = port.GetProtocol()
+
+				acc.AddFields(endpointMeasurement, fields, tags)
+			}
+		}
+	}
+
+	return nil
+}