Technical requirements

This chapter will use an application that is already instrumented with OpenTelemetry, a grocery store, and several backends to walk through the different concepts of the signals. The environment we will be launching relies on Docker Compose. The first step is to install Docker by following the installation instructions at https://docs.docker.com/get-docker/. Ensure Docker is running on your local system by using the following command:

$ docker version
Client:
 Cloud integration: 1.0.14
 Version:           20.10.6
 API version:       1.41
 Go version:        go1.16.3 ...

Next, let's ensure Compose is also installed by running the following command:

$ docker compose version
Docker Compose version 2.0.0-beta.1

Important Note

Compose was added to the Docker client in more recent client versions. If the previous command...