[WIP] first implementation stubs

internal/config.go

@@ -0,0 +1,31 @@
+package internal
+
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/jinzhu/configor"
+)
+
+type Config = struct {
+	LogLevel      string `default:"Info" env:"MAIL_DNS_SERVICE_LOGLEVEL"`
+	LabelSelector string `default:"kops.k8s.io/instance-role=Node" env:"MAIL_DNS_SERVICE_LABELSELECTOR"`
+	HcloudToken   string `default:"" env:"MAIL_DNS_SERVICE_HCLOUD_TOKEN"`
+}
+
+func GenConfig() (cfg *Config, err error) {
+
+	cfg = &Config{}
+
+	err = configor.New(&configor.Config{
+		ENVPrefix:          "METALLB_IP_FLOATER",
+		AutoReload:         true,
+		Silent:             true,
+		AutoReloadInterval: time.Minute}).Load(cfg, "config.json")
+	if err != nil {
+		return nil, errors.New(fmt.Sprintf("Error generating Config: %s", err.Error()))
+	}
+	return cfg, nil
+
+}