config

Golang Microservice configuration module

Configuration module for microservices written on Go. Preserves corporate standards for services configuration.

Installation

Using go get:

go get github.com/imdario/mergo

Using dep:

dep ensure -add github.com/microparts/configuration-golang

Import in your configuration file

import (
    "github.com/microparts/configuration-golang"
)

Usage

Some agreements:

1. Configuration must be declared as struct and reveals yaml structure
2. Default config folder: ./configuration. If you need to override, pass your path in ReadConfig function
3. Default stage is development. To override, set STAGE env variable

Code example:

package main

import (
	"github.com/microparts/configuration-golang"
	"gopkg.in/yaml.v2"
	"log"
)


// Your app config structure. This must be related to yaml config file structure. Everything that is not
// in this struct will be passed and will not be processed.
// Keep in mind that inheritance must be implemented with `struct{}`
type ConfigStruct struct {
	Log struct {
		Level  string `yaml:"level"`
		Debug  bool   `yaml:"debug"`
		Format string `yaml:"yaml"`
	} `yaml:"log"`
	Database struct {
		Host           string `yaml:"host"`
		Port           string `yaml:"port"`
		User           string `yaml:"user"`
		Pass           string `yaml:"password"`
		Name           string `yaml:"name"`
		SslMode        string `yaml:"sslMode"`
		Logs           bool   `yaml:"logs"`
		MigrateOnStart bool   `yaml:"migrateOnStart"`
		MigrationPath  string `yaml:"migrationsPath"`
	} `yaml:"db"`
	Http struct {
		Host string `yaml:"host"`
		Port string `yaml:"port"`
	} `yaml:"ws"`
}

func main() {
	// Reader accept config path as param. Commonly it stored like STAGE in ENV.
	configPath := config.GetEnv("CONFIG_PATH", "./configuration")
	// Reading ALL config files in defaults configuration folder and recursively merge them with STAGE configs
	configBytes, err := config.ReadConfigs(configPath)
	if err != nil {
		log.Fatalf("config reading error: %+v", err)
	}

    var Config ConfigStruct 
    // unmarshal config into Config structure 
	err = yaml.Unmarshal(configBytes, &Config)
	if err != nil {
        log.Fatalf("config unmarshal error: %+v", err)
    }
} 

License

The MIT License

Copyright © 2019 teamc.io, Inc. https://teamc.io

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.