[lxd] more cleanup

builder/lxd/builder_test.go

@@ -32,6 +32,28 @@ func TestBuilderPrepare_ConfigFile(t *testing.T) {
 		t.Fatalf("should not have error: %s", err)
 	}
 
+	// Good, remote image
+	config = testConfig()
+	config["image"] = "remote:bar"
+	warnings, err = b.Prepare(config)
+	if len(warnings) > 0 {
+		t.Fatalf("bad: %#v", warnings)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	// Good, remote output image
+	config = testConfig()
+	config["output_image"] = "remote:foo"
+	warnings, err = b.Prepare(config)
+	if len(warnings) > 0 {
+		t.Fatalf("bad: %#v", warnings)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
 	// Bad, missing image name
 	config = testConfig()
 	delete(config, "image")

builder/lxd/config.go

@@ -12,14 +12,11 @@ import (
 
 type Config struct {
 	common.PackerConfig `mapstructure:",squash"`
-	///ConfigFile          string   `mapstructure:"config_file"`
-	OutputImage    string `mapstructure:"output_image"`
-	ContainerName  string `mapstructure:"container_name"`
-	CommandWrapper string `mapstructure:"command_wrapper"`
-	RawInitTimeout string `mapstructure:"init_timeout"`
-	Image          string `mapstructure:"image"`
-	//EnvVars             []string `mapstructure:"template_environment_vars"`
-	InitTimeout time.Duration
+	OutputImage         string `mapstructure:"output_image"`
+	ContainerName       string `mapstructure:"container_name"`
+	CommandWrapper      string `mapstructure:"command_wrapper"`
+	Image               string `mapstructure:"image"`
+	InitTimeout         time.Duration
 
 	ctx interpolate.Context
 }
@@ -51,17 +48,8 @@ func NewConfig(raws ...interface{}) (*Config, error) {
 		c.CommandWrapper = "{{.Command}}"
 	}
 
-	if c.RawInitTimeout == "" {
-		c.RawInitTimeout = "20s"
-	}
-
 	if c.Image == "" {
-		errs = packer.MultiErrorAppend(errs, fmt.Errorf("`image` is a required parameter for LXD."))
-	}
-
-	c.InitTimeout, err = time.ParseDuration(c.RawInitTimeout)
-	if err != nil {
-		errs = packer.MultiErrorAppend(errs, fmt.Errorf("Failed parsing init_timeout: %s", err))
+		errs = packer.MultiErrorAppend(errs, fmt.Errorf("`image` is a required parameter for LXD. Please specify an image by alias or fingerprint. e.g. `ubuntu-daily:x`"))
 	}
 
 	if errs != nil && len(errs.Errors) > 0 {

builder/lxd/step_publish.go

@@ -21,6 +21,8 @@ func (s *stepPublish) Run(state multistep.StateBag) multistep.StepAction {
 	name := config.ContainerName
 
 	args := []string{
+		// If we use `lxc stop <container>`, an ephemeral container would die forever.
+		// `lxc publish` has special logic to handle this case.
 		"lxc", "publish", "--force", name, "--alias", config.OutputImage,
 	}