Start & Build open-telemetry/opentelemetry-demo Codebase

Prerequisites

Ensure that you have the required environments and dependencies installed for the respective languages in which the project is implemented. This guide focuses primarily on building and starting the project using Makefile, along with language-specific instructions when necessary.

Step-by-Step Guide

Clone the Repository

First, clone the opentelemetry-demo repository:

git clone https://github.com/open-telemetry/opentelemetry-demo.git
cd opentelemetry-demo

Using Makefile to Build and Start the Project

The project provides a Makefile that simplifies the build and run processes across different services. To build and start the demo project, follow these steps:

Navigate to the project directory:
```
cd opentelemetry-demo
```
Build the services:

Run the following command, which utilizes the Makefile to handle the build processes for all services:
```
make build
```
This command uses environment configurations found in the Makefile to compile the relevant services written in various programming languages.
Start the services:

After the build process is complete, run the following command to start the services:
```
make run
```

This command will execute the services defined in the Makefile and allow you to run the entire demo application.

Building and Running Individual Services

If you prefer to build and run specific services, follow these language-specific instructions:

Go Service (Checkout Service)

Build the Go Service:

Navigate to the checkout service directory:
```
cd src/checkoutservice
```
Use the following command to build the Go service. Ensure that you do not use the -mod=vendor flag:
```
go build .
```
Run the Go Service:

After building, you can run the service:
```
./checkoutservice
```

Java Service

Build the Java Service:

To build the Java service, navigate to the appropriate directory, typically under src/java:
```
cd src/java
```
Use a build tool such as Maven or Gradle to compile the project:
```
mvn clean install
```
Run the Java Service:

After building, you can start the service using:
```
java -jar target/your-jar-name.jar
```

Python Service

Build the Python Service:

Navigate to the Python service directory:
```
cd src/python
```
Install the required dependencies:
```
pip install -r requirements.txt
```
Run the Python Service:

Start the service using:
```
python app.py
```

Docker Support

If the project or specific services are containerized, you can also build and run using Docker:

Build the Docker Image:

Run the following command from the root directory of the project:
```
docker build -t opentelemetry-demo .
```
Run the Docker Container:

After the image is built, you can start a container:
```
docker run -p 8080:8080 opentelemetry-demo
```

Summary

By following the above steps, you can successfully build and start the OpenTelemetry demo project along with its services. Multiple languages are supported in the implementation, and building can be done through a unified Makefile or individually by navigating to specific service directories and executing the necessary build commands.

The information is derived from the project structure and common practices within the OpenTelemetry demo ecosystem.