Jaeger (Tracing)
Introduction
Jaeger, inspired by Dapper and OpenZipkin, is a distributed tracing system released as open source by Uber Technologies. It is used for monitoring and troubleshooting microservices-based distributed systems, including:
- Distributed context propagation
- Distributed transaction monitoring
- Root cause analysis
- Service dependency analysis
- Performance / latency optimization
OpenCensus Java has support for this exporter available through package io.opencensus.exporter.trace.jaeger
For assistance setting up Jaeger, Click here for a guided codelab.
Creating the exporter
To create the exporter, we’ll need to:
- Create an exporter in code
- Have the Jaeger endpoint available to receive traces
If using Maven, add these to your pom.xml file
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<opencensus.version>0.15.0</opencensus.version> <!-- The OpenCensus version to use -->
</properties>
<dependencies>
<dependency>
<groupId>io.opencensus</groupId>
<artifactId>opencensus-api</artifactId>
<version>${opencensus.version}</version>
</dependency>
<dependency>
<groupId>io.opencensus</groupId>
<artifactId>opencensus-exporter-trace-jaeger</artifactId>
<version>${opencensus.version}</version>
</dependency>
<dependency>
<groupId>io.opencensus</groupId>
<artifactId>opencensus-impl</artifactId>
<version>${opencensus.version}</version>
<scope>runtime</scope>
</dependency>
</dependencies>package io.opencensus.tutorial.jaeger;
import io.opencensus.exporter.trace.jaeger.JaegerTraceExporter;
public class JaegerTutorial {
public static void main(String ...args) throws Exception {
JaegerTraceExporter.createAndRegister("http://127.0.0.1:14268/api/traces", "service-b");
}
}Viewing your traces
Please visit the Jaeger UI endpoint http://localhost:16686
Project link
You can find out more about the Jaeger project at https://www.jaegertracing.io/