/go-opentelemetry-demoapp

A demo application in Go showcasing an OpenTelemetry setup

Primary LanguageGoMIT LicenseMIT

Opentelemetry demoapp in Go

Sets up a make-believe scenario with two microservices:

  • Inventory service - calls MongoDB and then the Supplier Service
  • Supplier service - calls MySQL
+--------+     +---------+    +--------+    
|  Curl  | ->  |Inventory| -> |Supplier|
+--------+     +---------+    +--------+
                    |              |
                    V              V
                  _____          _____   
                 /_____\        /_____\  
                 |Mongo|        |MySQL|  
                 \_____/        \_____/

Running

Use a bunch of different console windows.

Start Jeager:

docker run --name jaeger \
  -e COLLECTOR_ZIPKIN_HTTP_PORT=9411 \
  -p 5775:5775/udp \
  -p 6831:6831/udp \
  -p 6832:6832/udp \
  -p 5778:5778 \
  -p 16686:16686 \
  -p 14268:14268 \
  -p 9411:9411 \
  jaegertracing/all-in-one:1.6

Start MongoDB:

docker run -p 27017:27017 mongo:latest

Start MySQL

docker run --name test -p 3306:3306 -e MYSQL_ROOT_PASSWORD=my-secret-pw mysql:latest

Note! Currently, you need to use a separate DB client to create the test database as well as creating the SUPPLIER table and a line in it:

CREATE TABLE SUPPLIER (
      ID VARCHAR(64) PRIMARY KEY,
      NAME VARCHAR(128)
);

INSERT INTO SUPPLIER VALUES(4, 'Acme Inc.');

Start Inventory service:

go run cmd/inventory/main.go

Start Supplier service:

go run cmd/supplier/main.go

Finally, call the inventory service using curl with a trace context header:

curl localhost:3333/whatever -H 'traceparent:00-4bf92f3577b34da6a3ce929d0e0e4799-a3ce929d0e0e4799-01'

Navigate to Jaeger's GUI at http://localhost:16686/ and explore your trace!

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