Add OpenTelemetry blog (#2915)
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+---
+description: "This case shows using OpenTelemetry as the Tracer in the Dubbo project to report the Trace information to the Otlp Collector, which then forwards it to Zipkin and Jagger."
+linkTitle: Tracing Dubbo With OpenTelemetry
+date: 2024-01-31
+tags: ["ecosystem", "tracing", "OpenTelemetry"]
+---
+
+## Overview
+
+This case shows using OpenTelemetry(otlp) as the Tracer in the Dubbo project to report the Trace information to the Otlp Collector, which then forwards it to Zipkin and Jagger. [Code address](https://github.com/conghuhu/dubbo-samples/tree/master/4-governance/dubbo-samples-tracing/dubbo-samples-spring-boot-tracing-otel-otlp)
+
+It consists of three parts：
+
+- dubbo-samples-spring-boot-tracing-otel-oltp-interface
+- dubbo-samples-spring-boot-tracing-otel-oltp-provider
+- dubbo-samples-spring-boot-tracing-otel-oltp-consumer
+
+## Architecture
+
+
+
+## Quick Start
+
+### Install & start Otlp Collector
+
+Follow [OpenTelemetry Collector Quick Start](https://OpenTelemetry.io/docs/collector/getting-started/) to start the otlp collector.
+
+### Start Provider
+
+Run `org.apache.dubbo.springboot.demo.provider.ProviderApplication` directly from IDE.
+
+### Start Consumer
+
+Start `org.apache.dubbo.springboot.demo.consumer.ConsumerApplication` directly from IDE.
+
+### View trace information
+
+Open the zipkin dashboard `http://localhost:9411/zipkin/` in the browser:
+
+
+
+
+
+Open the Jaeger dashboard `http://localhost:16686/search` in the browser:
+
+
+
+
+
+## How to use it in Spring Boot project
+
+### 1. Add dependencies to your project
+
+For Spring Boot projects, you can use `dubbo-spring-boot-tracing-otel-otlp-starter`:
+
+```xml
+
+<!-- OpenTelemetry as Tracer, Otlp as exporter -->
+<dependency>
+ <groupId>org.apache.dubbo</groupId>
+ <artifactId>dubbo-spring-boot-tracing-otel-otlp-starter</artifactId>
+</dependency>
+```
+
+### 2. Configuration
+
+#### application.yml
+
+```yaml
+dubbo:
+ tracing:
+ enabled: true # default is false
+ sampling:
+ probability: 0.5 # sampling rate, default is 0.1
+ propagation:
+ type: W3C # W3C/B3 default is W3C
+ tracing-exporter:
+ otlp-config:
+ endpoint: http://localhost:4317
+ timeout: 10s # default is 10s
+ compression-method: none # none/gzip The method used to compress payloads, default is "none"
+ headers: # customized added headers, default is empty
+ auth: admin
+
+# tracing info output to logging
+logging:
+ level:
+ root: info
+ pattern:
+ console: '[%d{dd/MM/yy HH:mm:ss:SSS z}] %t %5p %c{2} [%X{traceId:-}, %X{spanId:-}]: %m%n'
+```
+
+## How to use based on Dubbo API
+
+### 1. Add dependencies to your project
+
+```xml
+ <!-- Required, dubbo-tracing core dependency -->
+ <dependency>
+ <groupId>org.apache.dubbo</groupId>
+ <artifactId>dubbo-tracing</artifactId>
+ </dependency>
+ <!-- Opentelemetry as Tracer -->
+ <dependency>
+ <groupId>io.micrometer</groupId>
+ <artifactId>micrometer-tracing-bridge-otel</artifactId>
+ </dependency>
+ <!-- OTlp as exporter -->
+ <dependency>
+ <groupId>io.opentelemetry</groupId>
+ <artifactId>opentelemetry-exporter-otlp</artifactId>
+ </dependency>
+```
+
+### 2. Configuration
+
+```java
+TracingConfig tracingConfig = new TracingConfig();
+// Enable dubbo tracing
+tracingConfig.setEnabled(true);
+// Set the sampling
+tracingConfig.setSampling(new SamplingConfig(1.0f));
+// Set Propagation, default is W3C, optional W3C/B3
+tracingConfig.setPropagation(new PropagationConfig("W3C"));
+// Set trace reporting
+ExporterConfig exporterConfig = new ExporterConfig();
+// Set up trace reporting to Zipkin
+exporterConfig.setZipkin(new ExporterConfig.OtlpConfig("http://localhost:4317", Duration.ofSeconds(10), "none"));
+tracingConfig.setExporter(exporterConfig);
+```
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