fix output

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"log"
@@ -29,8 +30,19 @@ var (
 	location  *time.Location
 	sha1ver   string // sha1 revision used to build the program
 	buildTime string // when the executable was built
+	results   []DrsResults
 )
 
+type DrsResults struct {
+	ClusterName            string
+	DrsScore               int32
+	NumVmsDrsBucket0To20   int32
+	NumVmsDrsBucket21To40  int32
+	NumVmsDrsBucket41To60  int32
+	NumVmsDrsBucket61To80  int32
+	NumVmsDrsBucket81To100 int32
+}
+
 /*
 	func findPerfCounter(perfManager *vim25.PerformanceManager, counterName string) (*vim25.PerfCounterInfo, error) {
 		perfCounters, err := perfManager.QueryPerfCounter(context.Background(), nil)
@@ -255,7 +267,6 @@ func query(t reflect.Type) {
 
 func getNumVmsPerDrsScoreBucket(client *govmomi.Client) error {
 	//properties := []string{"drsVmConfig.numVmPerDrsScoreBucket"}
-	properties := []string{"configurationEx"}
 	ctx := context.Background()
 	m := view.NewManager(client.Client)
 
@@ -269,27 +280,46 @@ func getNumVmsPerDrsScoreBucket(client *govmomi.Client) error {
 
 	err = clusters.Retrieve(ctx, []string{"ClusterComputeResource"}, nil, &clusterList)
 	if err != nil {
+		log.Printf("Error retrieving cluster list : '%s'\n", err)
 		return err
 	}
 
 	for _, cluster := range clusterList {
-		fmt.Printf("Cluster: %s\n", cluster.Name)
+		log.Printf("Cluster: %s\n", cluster.Name)
 
 		pc := property.DefaultCollector(client.Client)
-
-		//var clusterProps *types.ComputeResourceSummary
 		clusterProps := mo.ClusterComputeResource{}
 
-		err := pc.RetrieveOne(ctx, cluster.Reference(), properties, &clusterProps)
+		//err := pc.RetrieveOne(ctx, cluster.Reference(), properties, &clusterProps)
+		err := pc.RetrieveOne(ctx, cluster.Reference(), nil, &clusterProps)
 		if err != nil {
-			fmt.Printf("Error retrieving property : '%s'\n", err)
+			log.Printf("Error retrieving property : '%s'\n", err)
 			return err
 		}
 
-		foo := clusterProps.ConfigurationEx
-		bar := foo.GetComputeResourceConfigInfo()
-		fmt.Printf("foo: %v\n", foo)
-		fmt.Printf("bar: %v\n", bar)
+		// Properties defined at https://vdc-download.vmware.com/vmwb-repository/dcr-public/bf660c0a-f060-46e8-a94d-4b5e6ffc77ad/208bc706-e281-49b6-a0ce-b402ec19ef82/SDK/vsphere-ws/docs/ReferenceGuide/vim.ClusterComputeResource.Summary.html
+		ccr := clusterProps.Summary.(*types.ClusterComputeResourceSummary)
+		/*
+			fmt.Printf("DRS Score: %v\n", ccr.DrsScore)
+			fmt.Printf("VMs in DRS Score Bucket 0%% to 20%% : %d\n", ccr.NumVmsPerDrsScoreBucket[0])
+			fmt.Printf("VMs in DRS Score Bucket 21%% to 40%% : %d\n", ccr.NumVmsPerDrsScoreBucket[1])
+			fmt.Printf("VMs in DRS Score Bucket 41%% to 60%% : %d\n", ccr.NumVmsPerDrsScoreBucket[2])
+			fmt.Printf("VMs in DRS Score Bucket 61%% to 80%% : %d\n", ccr.NumVmsPerDrsScoreBucket[3])
+			fmt.Printf("VMs in DRS Score Bucket 81%% to 100%% : %d\n", ccr.NumVmsPerDrsScoreBucket[4])
+		*/
+
+		// Create a new result
+		result := DrsResults{
+			ClusterName:            cluster.Name,
+			DrsScore:               ccr.DrsScore,
+			NumVmsDrsBucket0To20:   ccr.NumVmsPerDrsScoreBucket[0],
+			NumVmsDrsBucket21To40:  ccr.NumVmsPerDrsScoreBucket[1],
+			NumVmsDrsBucket41To60:  ccr.NumVmsPerDrsScoreBucket[2],
+			NumVmsDrsBucket61To80:  ccr.NumVmsPerDrsScoreBucket[3],
+			NumVmsDrsBucket81To100: ccr.NumVmsPerDrsScoreBucket[4],
+		}
+		// Append to list of all results
+		results = append(results, result)
 
 		/*
 			// Print properties (fields)
@@ -306,12 +336,6 @@ func getNumVmsPerDrsScoreBucket(client *govmomi.Client) error {
 				fmt.Printf("Method %d: %s\n", i, method.Name)
 			}
 		*/
-
-		//bar := types.ClusterConfigInfoEx(foo).getNumVmsPerDrsScoreBucket()
-		//fmt.Printf("%v\n", clusterProps)
-
-		//fmt.Printf("Cluster: %s\n", clusterProps.Name)
-		//fmt.Printf("NumVmsPerDrsScoreBucket: %d\n", clusterProps.DrsVmConfig.NumVmPerDrsScoreBucket)
 	}
 
 	return nil
@@ -374,7 +398,15 @@ func main() {
 	//getSpecificVMMetrics(ctx, c.Client, *vmName)
 	err = getNumVmsPerDrsScoreBucket(c)
 	if err != nil {
-		fmt.Println("Error retrieving NumVmsPerDrsScoreBucket:", err)
+		log.Printf("Error retrieving NumVmsPerDrsScoreBucket: %s\n", err)
 		return
 	}
+
+	// Output final results in JSON
+	if len(results) > 0 {
+		j, _ := json.Marshal(results)
+		fmt.Println(string(j))
+	} else {
+		fmt.Println("{}")
+	}
 }