Go Local

Go Local is an application to demonstrate docker compose setup with infrastructure dependencies and a Makefile to make running the tasks convenient in the local environment with a minimum of host installation dependencies.

Development

Developing the application assumes you have Docker with docker compose. This can be more easily installed on the developer workstation by installing Docker Desktop.

Managing the environment is done using dotenv files. Since the containers are run through docker-compose, the .env file is automatically parsed and passed into the container. The following is the list of environment variables that are accepted by the application:

• APP_PORT: the port to expose the app on, defaults to 8080
• AUTORELOAD: enables autoreload of the application when the executable changes, defaults to true
• DB_URL: the url for connecting to the database, defaults to the db created by docker
• POSTGRES_DB: the postgres database name, defaults to example
• POSTGRES_PASSWORD: the postgres database password, defaults to example
• POSTGRES_USER: the postgres database user, defaults to example
• REDIS_URL: the url for connecting to the redis instance, defaults to the redis instance created by docker

Below are the common commands needed for local development. For a complete list of all commands, run make help

Running

To run in the background, execute

$ make start

If instead you prefer to run in the foregorund, run in interactive mode by executing

$ make run

Once the application is running, it will be available on the specified port, 8080 by default. You can verify that it's running by hitting the ping endpoint:

$ curl http://localhost:8080/ping

If running in the background, you can view the logs by

$ make logs

Building

To compile changes made to the application, run

$ make build

This will recompile the executable with your changes and restart the application if AUTORELOAD is enabled.

Dependencies

Dependency management is done via modules. To introduce a new dependency, import it in your code like a regular dependency. Then

$ make build-dependencies

This will download the dependency and modify the go.mod file to include it.

Shell

To connect to the container directly, run

$ make shell

Or to connect to the db shell, run

$ make shell-db

Testing and Linting

To test and lint the application, run

$ make test
$ make lint