dns server setup

functions/local.go

@@ -0,0 +1,53 @@
+package functions
+
+import (
+        "fmt"
+	"path/filepath"
+        "log"
+        "os"
+	"io/ioutil"
+)
+
+
+func FileExists(f string) bool {
+    info, err := os.Stat(f)
+    if os.IsNotExist(err) {
+        return false
+    }
+    return !info.IsDir()
+}
+
+func ConfigureDNS() error {
+	dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
+	if err != nil {
+            return err
+	}
+	_, err = os.Stat(dir + "/config/dnsconfig")
+        if os.IsNotExist(err) {
+                os.Mkdir(dir +"/config/dnsconfig", 744)
+        } else if err != nil {
+                fmt.Println("couldnt find or create /config/dnsconfig")
+                return err
+        }
+
+	if !FileExists(dir + "/config/dnsconfig/Corefile") {
+
+		corefile := `. {
+    hosts /root/dnsconfig/netmaker.hosts {
+	fallthrough	
+    }
+    forward . 8.8.8.8 8.8.4.4
+    log
+}
+`
+		corebytes := []byte(corefile)
+
+		err = ioutil.WriteFile(dir + "/config/dnsconfig/Corefile", corebytes, 0644)
+		if err != nil {
+			log.Println(err)
+			log.Println("")
+			return err
+		}
+	}
+	return err
+}