oc-schedulerd/conf/conf.go

package conf

import (
	"sync"

	"github.com/beego/beego/logs"
	"github.com/goraz/onion"
)

type Config struct {
	OcCatalogUrl 	string
	MongoUrl		string
	Logs 			string
	LokiUrl			string
	NatsUrl			string
}

var instance *Config
var once sync.Once

const defaultConfigFile = "/etc/oc/scheduler.json"
const localConfigFile = "./conf/local_scheduler.json"


func init(){
	
	configFile := ""
	var o *onion.Onion

	l3 := onion.NewEnvLayerPrefix("_", "OCSCHEDULER_")
	l2, err := onion.NewFileLayer(defaultConfigFile, nil)
	if err == nil {
		logs.Info("Config file found : " + defaultConfigFile)
		configFile = defaultConfigFile
	}
	l1, err := onion.NewFileLayer(localConfigFile, nil)
	if err == nil {
		logs.Info("Local config file found " + localConfigFile + ", overriding default file")
		configFile = localConfigFile
	}
	if configFile == "" {
		logs.Info("No config file found, using env")
		o = onion.New(l3)
	} else if l1 == nil && l2 == nil {
		o = onion.New(l1, l2, l3)
	} else if l1 == nil {
		o = onion.New(l2, l3)
	} else if l2 == nil {
		o = onion.New(l1, l3)
	}

	GetConfig().OcCatalogUrl = o.GetStringDefault("oc-catalog", "https://localhost:49618")
	GetConfig().Logs = o.GetStringDefault("loglevel", "info")
	GetConfig().LokiUrl = o.GetStringDefault("loki_url","http://127.0.0.1:3100")
	GetConfig().LokiUrl = o.GetStringDefault("nats_url","http://127.0.0.1:4222")
	GetConfig().MongoUrl = o.GetStringDefault("mongo_url","mongodb://127.0.0.1:27017")
}

func GetConfig() *Config {
	once.Do(func() {
		instance = &Config{}
	})
	return instance
}