Enable batch sender in oltpexporter (#10846)

#### Description

This PR adds opt-in support to oltp exporter for the experimental batch
sender
(#8122).
By default batch sender is not enabled.

Similar:
*
open-telemetry/opentelemetry-collector-contrib#34238
*
open-telemetry/opentelemetry-collector-contrib#32563

#### Link to tracking issue

Resolves
#10834

#### Testing

`exporter/otlpexporter/config_test.go`

#### Documentation

Updated the `oltpexporter` README to point to `exporterhelper` README
for batching.

---------

Co-authored-by: Dmitrii Anoshin <[email protected]>

Author: sfc-gh-sili

.chloggen/add-batching-option-to-otlp-exporter.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: exporter/otlp
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Add batching option to otlp exporter"
+
+# One or more tracking issues or pull requests related to the change
+issues: [8122]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

exporter/otlpexporter/README.md

@@ -59,4 +59,4 @@ Several helper files are leveraged to provide additional capabilities automatica
 
 - [gRPC settings](https://github.com/open-telemetry/opentelemetry-collector/blob/main/config/configgrpc/README.md)
 - [TLS and mTLS settings](https://github.com/open-telemetry/opentelemetry-collector/blob/main/config/configtls/README.md)
-- [Queuing, retry and timeout settings](https://github.com/open-telemetry/opentelemetry-collector/blob/main/exporter/exporterhelper/README.md)
+- [Queuing, batching, retry and timeout settings](https://github.com/open-telemetry/opentelemetry-collector/blob/main/exporter/exporterhelper/README.md)

exporter/otlpexporter/config.go

@@ -14,6 +14,7 @@ import (
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/config/configgrpc"
 	"go.opentelemetry.io/collector/config/configretry"
+	"go.opentelemetry.io/collector/exporter/exporterbatcher"
 	"go.opentelemetry.io/collector/exporter/exporterhelper"
 )
 
@@ -23,6 +24,10 @@ type Config struct {
 	QueueConfig                    exporterhelper.QueueSettings `mapstructure:"sending_queue"`
 	RetryConfig                    configretry.BackOffConfig    `mapstructure:"retry_on_failure"`
 
+	// Experimental: This configuration is at the early stage of development and may change without backward compatibility
+	// until https://github.com/open-telemetry/opentelemetry-collector/issues/8122 is resolved
+	BatcherConfig exporterbatcher.Config `mapstructure:"batcher"`
+
 	configgrpc.ClientConfig `mapstructure:",squash"` // squash ensures fields are correctly decoded in embedded struct.
 }
 

exporter/otlpexporter/config_test.go

@@ -19,6 +19,7 @@ import (
 	"go.opentelemetry.io/collector/config/configtls"
 	"go.opentelemetry.io/collector/confmap"
 	"go.opentelemetry.io/collector/confmap/confmaptest"
+	"go.opentelemetry.io/collector/exporter/exporterbatcher"
 	"go.opentelemetry.io/collector/exporter/exporterhelper"
 )
 
@@ -53,6 +54,16 @@ func TestUnmarshalConfig(t *testing.T) {
 				NumConsumers: 2,
 				QueueSize:    10,
 			},
+			BatcherConfig: exporterbatcher.Config{
+				Enabled:      true,
+				FlushTimeout: 200 * time.Millisecond,
+				MinSizeConfig: exporterbatcher.MinSizeConfig{
+					MinSizeItems: 1000,
+				},
+				MaxSizeConfig: exporterbatcher.MaxSizeConfig{
+					MaxSizeItems: 10000,
+				},
+			},
 			ClientConfig: configgrpc.ClientConfig{
 				Headers: map[string]configopaque.String{
 					"can you have a . here?": "F0000000-0000-0000-0000-000000000000",

exporter/otlpexporter/factory.go

@@ -13,6 +13,7 @@ import (
 	"go.opentelemetry.io/collector/config/configretry"
 	"go.opentelemetry.io/collector/consumer"
 	"go.opentelemetry.io/collector/exporter"
+	"go.opentelemetry.io/collector/exporter/exporterbatcher"
 	"go.opentelemetry.io/collector/exporter/exporterhelper"
 	"go.opentelemetry.io/collector/exporter/otlpexporter/internal/metadata"
 )
@@ -29,10 +30,14 @@ func NewFactory() exporter.Factory {
 }
 
 func createDefaultConfig() component.Config {
+	batcherCfg := exporterbatcher.NewDefaultConfig()
+	batcherCfg.Enabled = false
+
 	return &Config{
 		TimeoutSettings: exporterhelper.NewDefaultTimeoutSettings(),
 		RetryConfig:     configretry.NewDefaultBackOffConfig(),
 		QueueConfig:     exporterhelper.NewDefaultQueueSettings(),
+		BatcherConfig:   batcherCfg,
 		ClientConfig: configgrpc.ClientConfig{
 			Headers: map[string]configopaque.String{},
 			// Default to gzip compression
@@ -56,8 +61,10 @@ func createTracesExporter(
 		exporterhelper.WithTimeout(oCfg.TimeoutSettings),
 		exporterhelper.WithRetry(oCfg.RetryConfig),
 		exporterhelper.WithQueue(oCfg.QueueConfig),
+		exporterhelper.WithBatcher(oCfg.BatcherConfig),
 		exporterhelper.WithStart(oce.start),
-		exporterhelper.WithShutdown(oce.shutdown))
+		exporterhelper.WithShutdown(oce.shutdown),
+	)
 }
 
 func createMetricsExporter(
@@ -73,6 +80,7 @@ func createMetricsExporter(
 		exporterhelper.WithTimeout(oCfg.TimeoutSettings),
 		exporterhelper.WithRetry(oCfg.RetryConfig),
 		exporterhelper.WithQueue(oCfg.QueueConfig),
+		exporterhelper.WithBatcher(oCfg.BatcherConfig),
 		exporterhelper.WithStart(oce.start),
 		exporterhelper.WithShutdown(oce.shutdown),
 	)
@@ -91,6 +99,7 @@ func createLogsExporter(
 		exporterhelper.WithTimeout(oCfg.TimeoutSettings),
 		exporterhelper.WithRetry(oCfg.RetryConfig),
 		exporterhelper.WithQueue(oCfg.QueueConfig),
+		exporterhelper.WithBatcher(oCfg.BatcherConfig),
 		exporterhelper.WithStart(oce.start),
 		exporterhelper.WithShutdown(oce.shutdown),
 	)

exporter/otlpexporter/testdata/config.yaml

@@ -14,6 +14,11 @@ retry_on_failure:
   multiplier: 1.3
   max_interval: 60s
   max_elapsed_time: 10m
+batcher:
+  enabled: true
+  flush_timeout: 200ms
+  min_size_items: 1000
+  max_size_items: 10000
 auth:
   authenticator: nop
 headers: