[feat] - S3 metrics

pkg/sources/s3/metrics.go

@@ -0,0 +1,99 @@
+package s3
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+
+	"github.com/trufflesecurity/trufflehog/v3/pkg/common"
+)
+
+// metricsCollector defines the interface for recording S3 scan metrics.
+type metricsCollector interface {
+	// Object metrics.
+
+	RecordObjectScanned(bucket string)
+	RecordObjectSkipped(bucket, reason string)
+	RecordObjectError(bucket string)
+
+	// Role metrics.
+
+	RecordRoleScanned(roleArn string)
+	RecordBucketForRole(roleArn string)
+}
+
+type collector struct {
+	objectsScanned *prometheus.CounterVec
+	objectsSkipped *prometheus.CounterVec
+	objectsErrors  *prometheus.CounterVec
+	rolesScanned   *prometheus.GaugeVec
+	bucketsPerRole *prometheus.GaugeVec
+}
+
+var metricsInstance metricsCollector
+
+func init() {
+	metricsInstance = &collector{
+		objectsScanned: promauto.NewCounterVec(prometheus.CounterOpts{
+			Namespace: common.MetricsNamespace,
+			Subsystem: common.MetricsSubsystem,
+			Name:      "objects_scanned_total",
+			Help:      "Total number of S3 objects successfully scanned",
+		}, []string{"bucket"}),
+
+		objectsSkipped: promauto.NewCounterVec(prometheus.CounterOpts{
+			Namespace: common.MetricsNamespace,
+			Subsystem: common.MetricsSubsystem,
+			Name:      "objects_skipped_total",
+			Help:      "Total number of S3 objects skipped during scan",
+		}, []string{"bucket", "reason"}),
+
+		objectsErrors: promauto.NewCounterVec(prometheus.CounterOpts{
+			Namespace: common.MetricsNamespace,
+			Subsystem: common.MetricsSubsystem,
+			Name:      "objects_errors_total",
+			Help:      "Total number of errors encountered during S3 scan",
+		}, []string{"bucket"}),
+
+		rolesScanned: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Namespace: common.MetricsNamespace,
+			Subsystem: common.MetricsSubsystem,
+			Name:      "roles_scanned",
+			Help:      "Number of AWS roles being scanned",
+		}, []string{"role_arn"}),
+
+		bucketsPerRole: promauto.NewGaugeVec(prometheus.GaugeOpts{
+			Namespace: common.MetricsNamespace,
+			Subsystem: common.MetricsSubsystem,
+			Name:      "buckets_per_role",
+			Help:      "Number of buckets accessible per AWS role",
+		}, []string{"role_arn"}),
+	}
+}
+
+func (c *collector) RecordObjectScanned(bucket string) {
+	c.objectsScanned.WithLabelValues(bucket).Inc()
+}
+
+func (c *collector) RecordObjectSkipped(bucket, reason string) {
+	c.objectsSkipped.WithLabelValues(bucket, reason).Inc()
+}
+
+func (c *collector) RecordObjectError(bucket string) {
+	c.objectsErrors.WithLabelValues(bucket).Inc()
+}
+
+const defaultRoleARN = "default"
+
+func (c *collector) RecordRoleScanned(roleArn string) {
+	if roleArn == "" {
+		roleArn = defaultRoleARN
+	}
+	c.rolesScanned.WithLabelValues(roleArn).Set(1)
+}
+
+func (c *collector) RecordBucketForRole(roleArn string) {
+	if roleArn == "" {
+		roleArn = defaultRoleARN
+	}
+	c.bucketsPerRole.WithLabelValues(roleArn).Inc()
+}

pkg/sources/s3/s3.go

@@ -48,6 +48,7 @@ type Source struct {
 
 	checkpointer *Checkpointer
 	sources.Progress
+	metricsCollector metricsCollector
 
 	errorCount    *sync.Map
 	jobPool       *errgroup.Group
@@ -94,6 +95,7 @@ func (s *Source) Init(
 	s.conn = &conn
 
 	s.checkpointer = NewCheckpointer(ctx, conn.GetEnableResumption(), &s.Progress)
+	s.metricsCollector = metricsInstance
 
 	s.setMaxObjectSize(conn.GetMaxObjectSize())
 
@@ -106,11 +108,12 @@ func (s *Source) Init(
 
 func (s *Source) Validate(ctx context.Context) []error {
 	var errs []error
-	visitor := func(c context.Context, defaultRegionClient *s3.S3, roleArn string, buckets []string) {
+	visitor := func(c context.Context, defaultRegionClient *s3.S3, roleArn string, buckets []string) error {
 		roleErrs := s.validateBucketAccess(c, defaultRegionClient, roleArn, buckets)
 		if len(roleErrs) > 0 {
 			errs = append(errs, roleErrs...)
 		}
+		return nil
 	}
 
 	if err := s.visitRoles(ctx, visitor); err != nil {
@@ -307,6 +310,7 @@ func (s *Source) scanBuckets(
 
 	bucketsToScanCount := len(bucketsToScan)
 	for bucketIdx := pos.index; bucketIdx < bucketsToScanCount; bucketIdx++ {
+		s.metricsCollector.RecordBucketForRole(role)
 		bucket := bucketsToScan[bucketIdx]
 		ctx := context.WithValue(ctx, "bucket", bucket)
 
@@ -385,8 +389,9 @@ func (s *Source) scanBuckets(
 
 // Chunks emits chunks of bytes over a channel.
 func (s *Source) Chunks(ctx context.Context, chunksChan chan *sources.Chunk, _ ...sources.ChunkingTarget) error {
-	visitor := func(c context.Context, defaultRegionClient *s3.S3, roleArn string, buckets []string) {
+	visitor := func(c context.Context, defaultRegionClient *s3.S3, roleArn string, buckets []string) error {
 		s.scanBuckets(c, defaultRegionClient, roleArn, buckets, chunksChan)
+		return nil
 	}
 
 	return s.visitRoles(ctx, visitor)
@@ -427,6 +432,7 @@ func (s *Source) pageChunker(
 
 	for objIdx, obj := range metadata.page.Contents {
 		if obj == nil {
+			s.metricsCollector.RecordObjectSkipped(metadata.bucket, "nil_object")
 			if err := s.checkpointer.UpdateObjectCompletion(ctx, objIdx, metadata.bucket, metadata.page.Contents); err != nil {
 				ctx.Logger().Error(err, "could not update progress for nil object")
 			}
@@ -442,6 +448,7 @@ func (s *Source) pageChunker(
 		// Skip GLACIER and GLACIER_IR objects.
 		if obj.StorageClass == nil || strings.Contains(*obj.StorageClass, "GLACIER") {
 			ctx.Logger().V(5).Info("Skipping object in storage class", "storage_class", *obj.StorageClass)
+			s.metricsCollector.RecordObjectSkipped(metadata.bucket, "storage_class")
 			if err := s.checkpointer.UpdateObjectCompletion(ctx, objIdx, metadata.bucket, metadata.page.Contents); err != nil {
 				ctx.Logger().Error(err, "could not update progress for glacier object")
 			}
@@ -451,6 +458,7 @@ func (s *Source) pageChunker(
 		// Ignore large files.
 		if *obj.Size > s.maxObjectSize {
 			ctx.Logger().V(5).Info("Skipping %d byte file (over maxObjectSize limit)")
+			s.metricsCollector.RecordObjectSkipped(metadata.bucket, "size_limit")
 			if err := s.checkpointer.UpdateObjectCompletion(ctx, objIdx, metadata.bucket, metadata.page.Contents); err != nil {
 				ctx.Logger().Error(err, "could not update progress for large file")
 			}
@@ -460,6 +468,7 @@ func (s *Source) pageChunker(
 		// File empty file.
 		if *obj.Size == 0 {
 			ctx.Logger().V(5).Info("Skipping empty file")
+			s.metricsCollector.RecordObjectSkipped(metadata.bucket, "empty_file")
 			if err := s.checkpointer.UpdateObjectCompletion(ctx, objIdx, metadata.bucket, metadata.page.Contents); err != nil {
 				ctx.Logger().Error(err, "could not update progress for empty file")
 			}
@@ -469,6 +478,7 @@ func (s *Source) pageChunker(
 		// Skip incompatible extensions.
 		if common.SkipFile(*obj.Key) {
 			ctx.Logger().V(5).Info("Skipping file with incompatible extension")
+			s.metricsCollector.RecordObjectSkipped(metadata.bucket, "incompatible_extension")
 			if err := s.checkpointer.UpdateObjectCompletion(ctx, objIdx, metadata.bucket, metadata.page.Contents); err != nil {
 				ctx.Logger().Error(err, "could not update progress for incompatible file")
 			}
@@ -483,6 +493,7 @@ func (s *Source) pageChunker(
 
 			if strings.HasSuffix(*obj.Key, "/") {
 				ctx.Logger().V(5).Info("Skipping directory")
+				s.metricsCollector.RecordObjectSkipped(metadata.bucket, "directory")
 				return nil
 			}
 
@@ -508,8 +519,12 @@ func (s *Source) pageChunker(
 				Key:    obj.Key,
 			})
 			if err != nil {
-				if !strings.Contains(err.Error(), "AccessDenied") {
+				if strings.Contains(err.Error(), "AccessDenied") {
+					ctx.Logger().Error(err, "could not get S3 object; access denied")
+					s.metricsCollector.RecordObjectSkipped(metadata.bucket, "access_denied")
+				} else {
 					ctx.Logger().Error(err, "could not get S3 object")
+					s.metricsCollector.RecordObjectError(metadata.bucket)
 				}
 				// According to the documentation for GetObjectWithContext,
 				// the response can be non-nil even if there was an error.
@@ -563,6 +578,7 @@ func (s *Source) pageChunker(
 
 			if err := handlers.HandleFile(ctx, res.Body, chunkSkel, sources.ChanReporter{Ch: chunksChan}); err != nil {
 				ctx.Logger().Error(err, "error handling file")
+				s.metricsCollector.RecordObjectError(metadata.bucket)
 				return nil
 			}
 
@@ -580,6 +596,7 @@ func (s *Source) pageChunker(
 			if err := s.checkpointer.UpdateObjectCompletion(ctx, objIdx, metadata.bucket, metadata.page.Contents); err != nil {
 				ctx.Logger().Error(err, "could not update progress for scanned object")
 			}
+			s.metricsCollector.RecordObjectScanned(metadata.bucket)
 
 			return nil
 		})
@@ -633,14 +650,16 @@ func (s *Source) validateBucketAccess(ctx context.Context, client *s3.S3, roleAr
 // If no roles are configured, it will call the function with an empty role ARN.
 func (s *Source) visitRoles(
 	ctx context.Context,
-	f func(c context.Context, defaultRegionClient *s3.S3, roleArn string, buckets []string),
+	f func(c context.Context, defaultRegionClient *s3.S3, roleArn string, buckets []string) error,
 ) error {
 	roles := s.conn.GetRoles()
 	if len(roles) == 0 {
 		roles = []string{""}
 	}
 
 	for _, role := range roles {
+		s.metricsCollector.RecordRoleScanned(role)
+
 		client, err := s.newClient(defaultAWSRegion, role)
 		if err != nil {
 			return fmt.Errorf("could not create s3 client: %w", err)
@@ -651,7 +670,9 @@ func (s *Source) visitRoles(
 			return fmt.Errorf("role %q could not list any s3 buckets for scanning: %w", role, err)
 		}
 
-		f(ctx, client, role, bucketsToScan)
+		if err := f(ctx, client, role, bucketsToScan); err != nil {
+			return err
+		}
 	}
 
 	return nil

pkg/sources/s3/s3_integration_test.go

@@ -82,6 +82,37 @@ func TestSource_ChunksLarge(t *testing.T) {
 	assert.Equal(t, got, wantChunkCount)
 }
 
+func TestSourceChunksNoResumption(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
+	defer cancel()
+
+	s := Source{}
+	connection := &sourcespb.S3{
+		Credential: &sourcespb.S3_Unauthenticated{},
+		Buckets:    []string{"trufflesec-ahrav-test-2"},
+	}
+	conn, err := anypb.New(connection)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = s.Init(ctx, "test name", 0, 0, false, conn, 1)
+	chunksCh := make(chan *sources.Chunk)
+	go func() {
+		defer close(chunksCh)
+		err = s.Chunks(ctx, chunksCh)
+		assert.Nil(t, err)
+	}()
+
+	wantChunkCount := 19787
+	got := 0
+
+	for range chunksCh {
+		got++
+	}
+	assert.Equal(t, got, wantChunkCount)
+}
+
 func TestSource_Validate(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*15)
 	defer cancel()