config's Introduction

config

This repository contains the configuration parsing and management package designed for Emitter (https://emitter.io) service and related services. The configuration contains a flexible and multi-level secret overrides with Environment Variable and Hashicorp Vault providers implemented out of the box.

Installation

If you want to use this package, you can simply go get it as shown below.

go get github.com/emitter-io/config

Usage

import (
	cfg "github.com/emitter-io/config"
)

// NewDefault creates a default configuration.
func NewDefault() cfg.Config {
	return &Config{
		ListenAddr: ":8080",
		Cluster: &ClusterConfig{
			ListenAddr:    ":4000",
			AdvertiseAddr: "public:4000",
			Passphrase:    "emitter-io",
		},
	}
}

// Config represents main configuration.
type Config struct {
	ListenAddr string              `json:"listen"`             // The API port used for TCP & Websocket communication.'
	License    string              `json:"license"`            // The port used for gossip.'
	TLS        *cfg.TLSConfig      `json:"tls,omitempty"`      // The API port used for Secure TCP & Websocket communication.'
	Secrets    *cfg.VaultConfig    `json:"vault,omitempty"`    // The configuration for the Hashicorp Vault.
	Storage    *cfg.ProviderConfig `json:"storage,omitempty"`  // The configuration for the storage provider.
	Contract   *cfg.ProviderConfig `json:"contract,omitempty"` // The configuration for the contract provider.
}

// Vault returns a vault configuration.
func (c *Config) Vault() *cfg.VaultConfig {
	return c.Secrets
}

func main() {
	// Parse the configuration
	cfg, err := config.ReadOrCreate("emitter", "config.json", NewDefault, config.NewEnvironmentProvider(), config.NewVaultProvider("app"))
	if err != nil {
		panic("Unable to parse configuration, due to " + err.Error())
	}

    ...
}

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