[lxd] allow passing of publish properties

builder/lxd/config.go

@@ -12,10 +12,11 @@ import (
 
 type Config struct {
 	common.PackerConfig `mapstructure:",squash"`
-	OutputImage         string `mapstructure:"output_image"`
-	ContainerName       string `mapstructure:"container_name"`
-	CommandWrapper      string `mapstructure:"command_wrapper"`
-	Image               string `mapstructure:"image"`
+	OutputImage         string            `mapstructure:"output_image"`
+	ContainerName       string            `mapstructure:"container_name"`
+	CommandWrapper      string            `mapstructure:"command_wrapper"`
+	Image               string            `mapstructure:"image"`
+	PublishProperties   map[string]string `mapstructure:"publish_properties"`
 	InitTimeout         time.Duration
 
 	ctx interpolate.Context

builder/lxd/step_publish.go

@@ -32,6 +32,10 @@ func (s *stepPublish) Run(state multistep.StateBag) multistep.StepAction {
 		"publish", name, "--alias", config.OutputImage,
 	}
 
+	for k, v := range config.PublishProperties {
+		publish_args = append(publish_args, fmt.Sprintf("%s=%s", k, v))
+	}
+
 	ui.Say("Publishing container...")
 	stdoutString, err := LXDCommand(publish_args...)
 	if err != nil {