Use goroutine

Author: chaspy

go.mod

@@ -5,4 +5,5 @@ go 1.15
 require (
 	github.com/aws/aws-sdk-go v1.37.1
 	github.com/prometheus/client_golang v1.9.0
+	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
 )

go.sum

@@ -312,6 +312,7 @@ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

main.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/aws/aws-sdk-go/aws"
@@ -109,16 +110,25 @@ func getECRImageScanFindings(repositories []string) error {
 		return fmt.Errorf("failed to get image tags: %w", err)
 	}
 
+	var wg sync.WaitGroup
+
 	for _, repo := range repositories {
 		for _, imageTag := range imageTags {
-			result, err := describeImageScanFindings(svc, repo, imageTag)
-			if err != nil {
-				return fmt.Errorf("failed to describe image scan findings: %w", err)
-			}
+			wg.Add(1)
 
-			collectMetrics(result)
+			go func(svc *ecr.ECR, repo string, imageTag string) {
+				result, err := describeImageScanFindings(svc, repo, imageTag)
+				if err != nil {
+					log.Printf("failed to describe image scan findings: %v", err)
+				}
+
+				collectMetrics(result)
+				wg.Done()
+			}(svc, repo, imageTag)
 		}
 	}
+	wg.Wait()
+
 	return nil
 }