builder/openstack: load extensions, stop server if supported

builder/openstack/builder.go

@@ -67,6 +67,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 
 	// Build the steps
 	steps := []multistep.Step{
+		&StepLoadExtensions{},
 		&StepLoadFlavor{
 			Flavor: b.config.Flavor,
 		},
@@ -94,6 +95,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 			SSHWaitTimeout: b.config.SSHTimeout(),
 		},
 		&common.StepProvision{},
+		&StepStopServer{},
 		&stepCreateImage{},
 	}
 

builder/openstack/step_load_extensions.go

+package openstack
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"github.com/rackspace/gophercloud/openstack/compute/v2/extensions"
+	"github.com/rackspace/gophercloud/pagination"
+)
+
+// StepLoadExtensions gets the FlavorRef from a Flavor. It first assumes
+// that the Flavor is a ref and verifies it. Otherwise, it tries to find
+// the flavor by name.
+type StepLoadExtensions struct{}
+
+func (s *StepLoadExtensions) Run(state multistep.StateBag) multistep.StepAction {
+	config := state.Get("config").(Config)
+	ui := state.Get("ui").(packer.Ui)
+
+	// We need the v2 compute client
+	client, err := config.computeV2Client()
+	if err != nil {
+		err = fmt.Errorf("Error initializing compute client: %s", err)
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+
+	ui.Say("Discovering enabled extensions...")
+	result := make(map[string]struct{}, 15)
+	pager := extensions.List(client)
+	err = pager.EachPage(func(p pagination.Page) (bool, error) {
+		// Extract the extensions from this page
+		exts, err := extensions.ExtractExtensions(p)
+		if err != nil {
+			return false, err
+		}
+
+		for _, ext := range exts {
+			log.Printf("[DEBUG] Discovered extension: %s", ext.Alias)
+			result[ext.Alias] = struct{}{}
+		}
+
+		return true, nil
+	})
+	if err != nil {
+		err = fmt.Errorf("Error loading extensions: %s", err)
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+
+	state.Put("extensions", result)
+	return multistep.ActionContinue
+}
+
+func (s *StepLoadExtensions) Cleanup(state multistep.StateBag) {
+}

builder/openstack/step_stop_server.go

+package openstack
+
+import (
+	"fmt"
+
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"github.com/rackspace/gophercloud/openstack/compute/v2/extensions/startstop"
+	"github.com/rackspace/gophercloud/openstack/compute/v2/servers"
+)
+
+type StepStopServer struct{}
+
+func (s *StepStopServer) Run(state multistep.StateBag) multistep.StepAction {
+	ui := state.Get("ui").(packer.Ui)
+	config := state.Get("config").(Config)
+	extensions := state.Get("extensions").(map[string]struct{})
+	server := state.Get("server").(*servers.Server)
+
+	// Verify we have the extension
+	if _, ok := extensions["os-server-start-stop"]; !ok {
+		ui.Say("OpenStack cluster doesn't support stop, skipping...")
+		return multistep.ActionContinue
+	}
+
+	// We need the v2 compute client
+	client, err := config.computeV2Client()
+	if err != nil {
+		err = fmt.Errorf("Error initializing compute client: %s", err)
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+
+	ui.Say("Stopping server...")
+	if err := startstop.Stop(client, server.ID).ExtractErr(); err != nil {
+		err = fmt.Errorf("Error stopping server: %s", err)
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+
+	ui.Message("Waiting for server to stop...")
+	stateChange := StateChangeConf{
+		Pending:   []string{"ACTIVE"},
+		Target:    "STOPPED",
+		Refresh:   ServerStateRefreshFunc(client, server),
+		StepState: state,
+	}
+	if _, err := WaitForState(&stateChange); err != nil {
+		err := fmt.Errorf("Error waiting for server (%s) to stop: %s", server.ID, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepStopServer) Cleanup(state multistep.StateBag) {}