validate otlp config compression for grpc

Signed-off-by: Alex Boten <[email protected]>

Author: Alex Boten

service/internal/proctelemetry/config.go

@@ -280,7 +280,14 @@ func initOTLPgRPCExporter(ctx context.Context, otlpConfig *telemetry.OtlpMetric)
 	}
 
 	if otlpConfig.Compression != nil {
-		opts = append(opts, otlpmetricgrpc.WithCompressor(*otlpConfig.Compression))
+		switch *otlpConfig.Compression {
+		case "gzip":
+			opts = append(opts, otlpmetricgrpc.WithCompressor(*otlpConfig.Compression))
+		case "none":
+			break
+		default:
+			return nil, fmt.Errorf("unsupported compression %q", *otlpConfig.Compression)
+		}
 	}
 	if otlpConfig.Timeout != nil {
 		opts = append(opts, otlpmetricgrpc.WithTimeout(time.Millisecond*time.Duration(*otlpConfig.Timeout)))
@@ -344,7 +351,14 @@ func initOTLPgRPCSpanExporter(ctx context.Context, otlpConfig *telemetry.Otlp) (
 	}
 
 	if otlpConfig.Compression != nil {
-		opts = append(opts, otlptracegrpc.WithCompressor(*otlpConfig.Compression))
+		switch *otlpConfig.Compression {
+		case "gzip":
+			opts = append(opts, otlptracegrpc.WithCompressor(*otlpConfig.Compression))
+		case "none":
+			break
+		default:
+			return nil, fmt.Errorf("unsupported compression %q", *otlpConfig.Compression)
+		}
 	}
 	if otlpConfig.Timeout != nil && *otlpConfig.Timeout > 0 {
 		opts = append(opts, otlptracegrpc.WithTimeout(time.Millisecond*time.Duration(*otlpConfig.Timeout)))

service/internal/proctelemetry/config_test.go

@@ -162,7 +162,7 @@ func TestMetricReader(t *testing.T) {
 						Otlp: &telemetry.OtlpMetric{
 							Protocol:    "grpc/protobuf",
 							Endpoint:    "http://localhost:4317",
-							Compression: strPtr("gzip"),
+							Compression: strPtr("none"),
 							Timeout:     intPtr(1000),
 							Headers: map[string]string{
 								"test": "test1",
@@ -226,6 +226,7 @@ func TestMetricReader(t *testing.T) {
 					},
 				},
 			},
+			err: errors.New("unsupported compression \"invalid\""),
 		},
 		{
 			name: "periodic/otlp-http-exporter",
@@ -442,7 +443,7 @@ func TestSpanProcessor(t *testing.T) {
 					},
 				},
 			},
-			err: errors.New("unsupported protocol http/invalid"),
+			err: errors.New("unsupported protocol \"http/invalid\""),
 		},
 		{
 			name: "batch/otlp-grpc-exporter-no-endpoint",
@@ -553,6 +554,7 @@ func TestSpanProcessor(t *testing.T) {
 					},
 				},
 			},
+			err: errors.New("unsupported compression \"invalid\""),
 		},
 		{
 			name: "batch/otlp-http-exporter",