add otel

Author: SmilingPixel

otel_java_agent_download.sh

@@ -0,0 +1,5 @@
+wget https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/latest/download/opentelemetry-javaagent.jar
+wget https://github.com/alibabacloud-observability/opentelemetry-best-practice/raw/refs/heads/main/opentelemetry-javaagent-extension/ot-java-agent-extension-1.28.0.jar
+
+mv opentelemetry-javaagent.jar ./ts-gateway-service/
+mv ot-java-agent-extension-1.28.0.jar ./ts-gateway-service/

ts-gateway-service/Dockerfile

@@ -2,7 +2,11 @@ FROM java:8-jre
 
 RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone
 
-ADD ./target/ts-gateway-service-1.0.jar /app/
-CMD ["java", "-Xmx1024m",  "-jar", "/app/ts-gateway-service-1.0.jar"]
+ADD ./target/ts-gateway-service-1.0.jar \
+    ./opentelemetry-javaagent.jar \
+    ./ot-java-agent-extension-1.28.0.jar \
+    /app/
 
-EXPOSE 18888 
+CMD ["java", "-Xmx1024m", "-javaagent:/app/opentelemetry-javaagent.jar", "-Dotel.javaagent.extensions=/app/ot-java-agent-extension-1.28.0.jar", "-jar", "/app/ts-gateway-service-1.0.jar"]
+
+EXPOSE 18888

ts-gateway-service/pom.xml

@@ -41,6 +41,20 @@
             <groupId>com.alibaba.csp</groupId>
             <artifactId>sentinel-spring-cloud-gateway-adapter</artifactId>
         </dependency>
+
+        <dependency>
+            <groupId>io.opentelemetry.javaagent</groupId>
+            <artifactId>opentelemetry-javaagent</artifactId>
+            <version>1.28.0</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>io.opentelemetry</groupId>
+            <artifactId>opentelemetry-sdk</artifactId>
+            <version>1.45.0</version>
+        </dependency>
+
     </dependencies>
 
     <build>

ts-gateway-service/src/main/java/gateway/TestController.java

@@ -0,0 +1,14 @@
+package gateway;
+
+import javax.servlet.http.HttpServletResponse;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class TestController {
+
+    @GetMapping("/api/v1/gateway/test")
+    public String testEndpoint() {
+        return "OK";
+    }
+}