Only delete bucket if the volume is the alone user

pkg/driver/controllerserver.go

@@ -45,7 +45,8 @@ const (
 
 func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
 	params := req.GetParameters()
-
+	capacityBytes := int64(req.GetCapacityRange().GetRequiredBytes())
+	mounterType := params[mounter.TypeKey]
 	volumeID := sanitizeVolumeID(req.GetName())
 	bucketName := volumeID
 	prefix := ""
@@ -70,58 +71,47 @@ func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
 		return nil, status.Error(codes.InvalidArgument, "Volume Capabilities missing in request")
 	}
 
-	capacityBytes := int64(req.GetCapacityRange().GetRequiredBytes())
-
-	mounter := params[mounter.TypeKey]
-
 	glog.V(4).Infof("Got a request to create volume %s", volumeID)
+
+	meta := &s3.FSMeta{
+		BucketName:    bucketName,
+		Prefix:        prefix,
+		Mounter:       mounterType,
+		CapacityBytes: capacityBytes,
+		FSPath:        defaultFsPath,
+	}
+
 	client, err := s3.NewClientFromSecret(req.GetSecrets())
 	if err != nil {
 		return nil, fmt.Errorf("failed to initialize S3 client: %s", err)
 	}
+
 	exists, err := client.BucketExists(bucketName)
 	if err != nil {
 		return nil, fmt.Errorf("failed to check if bucket %s exists: %v", volumeID, err)
 	}
-	var meta *s3.FSMeta
-	if exists {
-		meta, err = client.GetFSMeta(bucketName, prefix)
 
-		if err != nil {
-			glog.Warningf("Bucket %s exists, but failed to get its metadata: %v", volumeID, err)
-			meta = &s3.FSMeta{
-				BucketName:    bucketName,
-				Prefix:        prefix,
-				Mounter:       mounter,
-				CapacityBytes: capacityBytes,
-				FSPath:        defaultFsPath,
-				CreatedByCsi:  false,
-			}
-		} else {
+	if exists {
+		// get meta, ignore errors as it could just mean meta does not exist yet
+		m, err := client.GetFSMeta(bucketName, prefix)
+		if err == nil {
 			// Check if volume capacity requested is bigger than the already existing capacity
-			if capacityBytes > meta.CapacityBytes {
+			if capacityBytes > m.CapacityBytes {
 				return nil, status.Error(
 					codes.AlreadyExists, fmt.Sprintf("Volume with the same name: %s but with smaller size already exist", volumeID),
 				)
 			}
-			meta.Mounter = mounter
 		}
 	} else {
 		if err = client.CreateBucket(bucketName); err != nil {
 			return nil, fmt.Errorf("failed to create bucket %s: %v", bucketName, err)
 		}
+	}
+
 	if err = client.CreatePrefix(bucketName, path.Join(prefix, defaultFsPath)); err != nil {
 		return nil, fmt.Errorf("failed to create prefix %s: %v", path.Join(prefix, defaultFsPath), err)
 	}
-		meta = &s3.FSMeta{
-			BucketName:    bucketName,
-			Prefix:        prefix,
-			Mounter:       mounter,
-			CapacityBytes: capacityBytes,
-			FSPath:        defaultFsPath,
-			CreatedByCsi:  !exists,
-		}
-	}
+
 	if err := client.SetFSMeta(meta); err != nil {
 		return nil, fmt.Errorf("error setting bucket metadata: %w", err)
 	}
@@ -155,38 +145,30 @@ func (cs *controllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVol
 	if err != nil {
 		return nil, fmt.Errorf("failed to initialize S3 client: %s", err)
 	}
-	exists, err := client.BucketExists(bucketName)
-	if err != nil {
-		return nil, err
+
+	if _, err := client.GetFSMeta(bucketName, prefix); err != nil {
+		glog.V(5).Infof("FSMeta of volume %s does not exist, ignoring delete request", volumeID)
+		return &csi.DeleteVolumeResponse{}, nil
 	}
-	if exists {
-		meta, err := client.GetFSMeta(bucketName, prefix)
-		if err != nil {
-			return nil, fmt.Errorf("failed to get metadata of buckect %s", volumeID)
-		}
-		if prefix != "" {
-			if err := client.RemovePrefix(bucketName, prefix); err != nil {
-				return nil, fmt.Errorf("unable to remove prefix: %w", err)
-			}
-		}
-		if meta.CreatedByCsi {
+
+	if prefix == "" {
+		// prefix is empty, we delete the whole bucket
 		if err := client.RemoveBucket(bucketName); err != nil {
 			glog.V(3).Infof("Failed to remove volume %s: %v", volumeID, err)
 			return nil, err
 		}
-			glog.V(4).Infof("Bucket %s removed", volumeID)
+		glog.V(4).Infof("Bucket %s removed", bucketName)
 	} else {
-			glog.V(4).Infof("Bucket %s is not created by csi-s3, will not be deleted by csi-s3 automatically.", volumeID)
+		if err := client.RemovePrefix(bucketName, prefix); err != nil {
+			return nil, fmt.Errorf("unable to remove prefix: %w", err)
 		}
-	} else {
-		glog.V(5).Infof("Bucket %s does not exist, ignoring request", volumeID)
+		glog.V(4).Infof("Prefix %s removed", prefix)
 	}
 
 	return &csi.DeleteVolumeResponse{}, nil
 }
 
 func (cs *controllerServer) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error) {
-
 	// Check arguments
 	if len(req.GetVolumeId()) == 0 {
 		return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")

pkg/s3/client.go

@@ -39,7 +39,6 @@ type FSMeta struct {
 	Mounter       string `json:"Mounter"`
 	FSPath        string `json:"FSPath"`
 	CapacityBytes int64  `json:"CapacityBytes"`
-	CreatedByCsi  bool   `json:"CreatedByCsi"`
 }
 
 func NewClient(cfg *Config) (*s3Client, error) {

test/test.sh

@@ -5,4 +5,4 @@ export MINIO_SECRET_KEY=DSG643HGDS
 mkdir -p /tmp/minio
 minio server /tmp/minio &>/dev/null &
 sleep 5
-go test ./... -cover
+go test ./... -cover -ginkgo.noisySkippings=false