docker-push: add code to handle seperate registry, push a specific repository/tag #774

post-processor/docker-push/post-processor.go

@@ -10,6 +10,8 @@ import (
 type Config struct {
 	common.PackerConfig `mapstructure:",squash"`
 
+	Repository string `mapstructure:"repository"`
+	Tag        string `mapstructure:"tag"`
 	Registry   string `mapstructure:"registry"`
 	Username   string `mapstructure:"username"`
 	Password   string `mapstructure:"password"`
@@ -40,6 +42,7 @@ func (p *PostProcessor) Configure(raws ...interface{}) error {
 	templates := map[string]*string{
 		"username":   &p.config.Username,
 		"password":   &p.config.Password,
+		"repository": &p.config.Repository,
 	}
 
 	for key, ptr := range templates {
@@ -123,11 +126,23 @@ func (p *PostProcessor) PostProcess(ui packer.Ui, artifact packer.Artifact) (pac
 		}
 	}
 
-	cmd := exec.Command("docker", "push", id)
+	if p.config.Tag != "" {
+
+		cmd := exec.Command("docker", "push", p.config.Repository+":"+p.config.Tag)
+		if err := cmd.Run(); err != nil {
+			ui.Say("Failed to push image: " + id)
+			return nil, false, err
+		}
+
+	} else {
+
+		cmd := exec.Command("docker", "push", p.config.Repository)
 		if err := cmd.Run(); err != nil {
 			ui.Say("Failed to push image: " + id)
 			return nil, false, err
 		}
 
+	}
+
 	return nil, false, nil
 }