Add kube_inventory input plugin (#5110)

plugins/inputs/kube_inventory/deployment.go

@@ -0,0 +1,40 @@
+package kube_inventory
+
+import (
+	"context"
+	"time"
+
+	"github.com/ericchiang/k8s/apis/apps/v1beta1"
+
+	"github.com/influxdata/telegraf"
+)
+
+func collectDeployments(ctx context.Context, acc telegraf.Accumulator, ki *KubernetesInventory) {
+	list, err := ki.client.getDeployments(ctx)
+	if err != nil {
+		acc.AddError(err)
+		return
+	}
+	for _, d := range list.Items {
+		if err = ki.gatherDeployment(*d, acc); err != nil {
+			acc.AddError(err)
+			return
+		}
+	}
+}
+
+func (ki *KubernetesInventory) gatherDeployment(d v1beta1.Deployment, acc telegraf.Accumulator) error {
+	fields := map[string]interface{}{
+		"replicas_available":   d.Status.GetAvailableReplicas(),
+		"replicas_unavailable": d.Status.GetUnavailableReplicas(),
+		"created":              time.Unix(d.Metadata.CreationTimestamp.GetSeconds(), int64(d.Metadata.CreationTimestamp.GetNanos())).UnixNano(),
+	}
+	tags := map[string]string{
+		"deployment_name": d.Metadata.GetName(),
+		"namespace":       d.Metadata.GetNamespace(),
+	}
+
+	acc.AddFields(deploymentMeasurement, fields, tags)
+
+	return nil
+}