Simple configuration on Go

Very often your new tool/service needs to have a configuration defined either via parameters or configuration file.
For example, you want to have different settings in development and production environments, or you just have a separate fleets for different clients.

It is pretty easy to add configuration support to you Go application using YAML for configurations and gopkg.in/yaml.v2 for deserializing YAML files into struct value.

Here is an example YAML configuration file. It contains service name and its listening endpoint, and also database connection URL. Pretty simple!

To read configuration, we first open and read whole configuration file, and then use yaml package to unmarshal it into value of Configuration type.

And finally a part of main function in our application, where we use parameter to pass a path to the configuration file, and load it to use configuration later:

That's it. Simple and fast!