enable dns w/ docker

Dockerfile

@@ -4,13 +4,13 @@
 
 FROM ubuntu:14.04
 
-RUN apt-get update -qq                               \
+RUN apt-get update -qq                                   \
 	&& apt-get -y install curl                       \ 
-		apt-transport-https                          \
-		ca-certificates                              \
-		curl                                         \
-		lxc                                          \
-		iptables                                     \
+		apt-transport-https                      \
+		ca-certificates                          \
+		curl                                     \
+		lxc                                      \
+		iptables                                 \
 	&& curl -sSL https://get.docker.com/ubuntu/ | sh \
 	&& rm -rf /var/lib/apt/lists/*
 

main.go

@@ -12,16 +12,17 @@ import (
 )
 
 type Docker struct {
-	Storage  string `json:"storage_driver"`
-	Registry string `json:"registry"`
-	Insecure bool   `json:"insecure"`
-	Username string `json:"username"`
-	Password string `json:"password"`
-	Email    string `json:"email"`
-	Auth     string `json:"auth"`
-	Repo     string `json:"repo"`
-	Tag      string `json:"tag"`
-	File     string `json:"file"`
+	Storage  string   `json:"storage_driver"`
+	Registry string   `json:"registry"`
+	Insecure bool     `json:"insecure"`
+	Username string   `json:"username"`
+	Password string   `json:"password"`
+	Email    string   `json:"email"`
+	Auth     string   `json:"auth"`
+	Repo     string   `json:"repo"`
+	Tag      string   `json:"tag"`
+	File     string   `json:"file"`
+	Dns      []string `json:"dns"`
 }
 
 func main() {
@@ -55,12 +56,16 @@ func main() {
 		cmd.Stderr = ioutil.Discard
 		cmd.Run()
 
-		args := []string{"-d", "-s", vargs.Storage}
+		args := []string{"daemon", "-s", vargs.Storage}
 
 		if vargs.Insecure && len(vargs.Registry) != 0 {
 			args = append(args, "--insecure-registry", vargs.Registry)
 		}
 
+		for _, value := range vargs.Dns {
+			args = append(args, "--dns", value)
+		}
+
 		cmd = exec.Command("docker", args...)
 		cmd.Stdout = ioutil.Discard
 		cmd.Stderr = ioutil.Discard
@@ -74,6 +79,8 @@ func main() {
 	// Set the Registry value
 	if len(vargs.Registry) == 0 {
 		vargs.Registry = "https://index.docker.io/v1/"
+	} else {
+		vargs.Repo = fmt.Sprintf("%s/%s", vargs.Registry, vargs.Repo)
 	}
 	// Set the Dockerfile path
 	if len(vargs.File) == 0 {