Add base support for openstack [GH-155]

This change adds base support for an openstack builder.
Thank you to Rackspace for providing cloud assets to complete this work
and @sam-falvo for working with us on the perigee/gophercloud changes.

builder/openstack/access_config.go

@@ -0,0 +1,73 @@
+package openstack
+
+import (
+	"fmt"
+	"github.com/mitchellh/packer/packer"
+	"github.com/rackspace/gophercloud"
+	"os"
+)
+
+// AccessConfig is for common configuration related to openstack access
+type AccessConfig struct {
+	Username string `mapstructure:"username"`
+	Password string `mapstructure:"password"`
+	Provider string `mapstructure:"provider"`
+}
+
+// Auth returns a valid Auth object for access to openstack services, or
+// an error if the authentication couldn't be resolved.
+func (c *AccessConfig) Auth() (gophercloud.AccessProvider, error) {
+	username := c.Username
+	password := c.Password
+	provider := c.Provider
+
+	if username == "" {
+		username = os.Getenv("SDK_USERNAME")
+	}
+	if password == "" {
+		password = os.Getenv("SDK_PASSWORD")
+	}
+	if provider == "" {
+		provider = os.Getenv("SDK_PROVIDER")
+	}
+
+	authoptions := gophercloud.AuthOptions{
+		Username:    username,
+		Password:    password,
+		AllowReauth: true,
+	}
+
+	return gophercloud.Authenticate(provider, authoptions)
+}
+
+func (c *AccessConfig) Prepare(t *packer.ConfigTemplate) []error {
+	if t == nil {
+		var err error
+		t, err = packer.NewConfigTemplate()
+		if err != nil {
+			return []error{err}
+		}
+	}
+
+	templates := map[string]*string{
+		"username": &c.Username,
+		"password": &c.Password,
+		"provider": &c.Provider,
+	}
+
+	errs := make([]error, 0)
+	for n, ptr := range templates {
+		var err error
+		*ptr, err = t.Process(*ptr, nil)
+		if err != nil {
+			errs = append(
+				errs, fmt.Errorf("Error processing %s: %s", n, err))
+		}
+	}
+
+	if len(errs) > 0 {
+		return errs
+	}
+
+	return nil
+}

builder/openstack/access_config_test.go

@@ -0,0 +1,16 @@
+package openstack
+
+import (
+	"testing"
+)
+
+func testAccessConfig() *AccessConfig {
+	return &AccessConfig{}
+}
+
+func TestAccessConfigPrepare_Region(t *testing.T) {
+	c := testAccessConfig()
+	if err := c.Prepare(nil); err != nil {
+		t.Fatalf("shouldn't have err: %s", err)
+	}
+}

builder/openstack/builder.go

@@ -0,0 +1,122 @@
+// The openstack package contains a packer.Builder implementation that
+// builds Images for openstack.
+
+package openstack
+
+import (
+	//"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/common"
+	"github.com/mitchellh/packer/packer"
+	"github.com/rackspace/gophercloud"
+	"log"
+)
+
+// The unique ID for this builder
+const BuilderId = "mitchellh.openstack"
+
+type config struct {
+	common.PackerConfig `mapstructure:",squash"`
+	AccessConfig        `mapstructure:",squash"`
+	ImageConfig         `mapstructure:",squash"`
+	RunConfig           `mapstructure:",squash"`
+
+	tpl *packer.ConfigTemplate
+}
+
+type Builder struct {
+	config config
+	runner multistep.Runner
+}
+
+func (b *Builder) Prepare(raws ...interface{}) error {
+	md, err := common.DecodeConfig(&b.config, raws...)
+	if err != nil {
+		return err
+	}
+
+	b.config.tpl, err = packer.NewConfigTemplate()
+	if err != nil {
+		return err
+	}
+	b.config.tpl.UserVars = b.config.PackerUserVars
+
+	// Accumulate any errors
+	errs := common.CheckUnusedConfig(md)
+	errs = packer.MultiErrorAppend(errs, b.config.AccessConfig.Prepare(b.config.tpl)...)
+	errs = packer.MultiErrorAppend(errs, b.config.ImageConfig.Prepare(b.config.tpl)...)
+	errs = packer.MultiErrorAppend(errs, b.config.RunConfig.Prepare(b.config.tpl)...)
+
+	if errs != nil && len(errs.Errors) > 0 {
+		return errs
+	}
+
+	log.Printf("Config: %+v", b.config)
+	return nil
+}
+
+func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
+	auth, err := b.config.AccessConfig.Auth()
+	if err != nil {
+		return nil, err
+	}
+
+	// Setup the state bag and initial state for the steps
+	state := make(map[string]interface{})
+	state["config"] = b.config
+	state["accessor"] = auth
+	api := &gophercloud.ApiCriteria{
+		Name:      "cloudServersOpenStack",
+		Region:    "DFW",
+		VersionId: "2",
+		UrlChoice: gophercloud.PublicURL,
+	}
+	state["api"] = api
+
+	state["hook"] = hook
+	state["ui"] = ui
+
+	// Build the steps
+	steps := []multistep.Step{
+		&StepKeyPair{},
+		&StepRunSourceServer{
+			Name:        b.config.ImageName,
+			Flavor:      b.config.Flavor,
+			SourceImage: b.config.SourceImage,
+		},
+		&common.StepConnectSSH{
+			SSHAddress:     SSHAddress(&auth, api, b.config.SSHPort),
+			SSHConfig:      SSHConfig(b.config.SSHUsername),
+			SSHWaitTimeout: b.config.SSHTimeout(),
+		},
+		&common.StepProvision{},
+		&stepCreateImage{},
+	}
+
+	// Run!
+	if b.config.PackerDebug {
+		b.runner = &multistep.DebugRunner{
+			Steps:   steps,
+			PauseFn: common.MultistepDebugFn(ui),
+		}
+	} else {
+		b.runner = &multistep.BasicRunner{Steps: steps}
+	}
+
+	b.runner.Run(state)
+
+	// If there was an error, return that
+	if rawErr, ok := state["error"]; ok {
+		return nil, rawErr.(error)
+	}
+
+	// XXX - add artifact
+	return nil, nil
+}
+
+func (b *Builder) Cancel() {
+	if b.runner != nil {
+		log.Println("Cancelling the step runner...")
+		b.runner.Cancel()
+	}
+}

builder/openstack/builder_test.go

@@ -0,0 +1,78 @@
+package openstack
+
+import (
+	"github.com/mitchellh/packer/packer"
+	"testing"
+)
+
+func testConfig() map[string]interface{} {
+	return map[string]interface{}{
+		"username":     "foo",
+		"password":     "bar",
+		"provider":     "foo",
+		"image_name":   "foo",
+		"source_image": "foo",
+		"flavor":       "foo",
+		"ssh_username": "root",
+	}
+}
+
+func TestBuilder_ImplementsBuilder(t *testing.T) {
+	var raw interface{}
+	raw = &Builder{}
+	if _, ok := raw.(packer.Builder); !ok {
+		t.Fatalf("Builder should be a builder")
+	}
+}
+
+func TestBuilder_Prepare_BadType(t *testing.T) {
+	b := &Builder{}
+	c := map[string]interface{}{
+		"password": []string{},
+	}
+
+	err := b.Prepare(c)
+	if err == nil {
+		t.Fatalf("prepare should fail")
+	}
+}
+
+func TestBuilderPrepare_ImageName(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	// Test good
+	config["image_name"] = "foo"
+	err := b.Prepare(config)
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	// Test bad
+	config["image_name"] = "foo {{"
+	b = Builder{}
+	err = b.Prepare(config)
+	if err == nil {
+		t.Fatal("should have error")
+	}
+
+	// Test bad
+	delete(config, "image_name")
+	b = Builder{}
+	err = b.Prepare(config)
+	if err == nil {
+		t.Fatal("should have error")
+	}
+}
+
+func TestBuilderPrepare_InvalidKey(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	// Add a random key
+	config["i_should_not_be_valid"] = true
+	err := b.Prepare(config)
+	if err == nil {
+		t.Fatal("should have error")
+	}
+}

builder/openstack/image_config.go

@@ -0,0 +1,45 @@
+package openstack
+
+import (
+	"fmt"
+	"github.com/mitchellh/packer/packer"
+)
+
+// ImageConfig is for common configuration related to creating Images.
+type ImageConfig struct {
+	ImageName string `mapstructure:"image_name"`
+}
+
+func (c *ImageConfig) Prepare(t *packer.ConfigTemplate) []error {
+	if t == nil {
+		var err error
+		t, err = packer.NewConfigTemplate()
+		if err != nil {
+			return []error{err}
+		}
+	}
+
+	templates := map[string]*string{
+		"image_name": &c.ImageName,
+	}
+
+	errs := make([]error, 0)
+	for n, ptr := range templates {
+		var err error
+		*ptr, err = t.Process(*ptr, nil)
+		if err != nil {
+			errs = append(
+				errs, fmt.Errorf("Error processing %s: %s", n, err))
+		}
+	}
+
+	if c.ImageName == "" {
+		errs = append(errs, fmt.Errorf("An image_name must be specified"))
+	}
+
+	if len(errs) > 0 {
+		return errs
+	}
+
+	return nil
+}

builder/openstack/image_config_test.go

@@ -0,0 +1,23 @@
+package openstack
+
+import (
+	"testing"
+)
+
+func testImageConfig() *ImageConfig {
+	return &ImageConfig{
+		ImageName: "foo",
+	}
+}
+
+func TestImageConfigPrepare_Region(t *testing.T) {
+	c := testImageConfig()
+	if err := c.Prepare(nil); err != nil {
+		t.Fatalf("shouldn't have err: %s", err)
+	}
+
+	c.ImageName = ""
+	if err := c.Prepare(nil); err == nil {
+		t.Fatal("should have error")
+	}
+}

builder/openstack/run_config.go

@@ -0,0 +1,86 @@
+package openstack
+
+import (
+	"errors"
+	"fmt"
+	"github.com/mitchellh/packer/packer"
+	"time"
+)
+
+// RunConfig contains configuration for running an instance from a source
+// image and details on how to access that launched image.
+type RunConfig struct {
+	SourceImage   string `mapstructure:"source_image"`
+	Flavor        string `mapstructure:"flavor"`
+	RawSSHTimeout string `mapstructure:"ssh_timeout"`
+	SSHUsername   string `mapstructure:"ssh_username"`
+	SSHPort       int    `mapstructure:"ssh_port"`
+
+	// Unexported fields that are calculated from others
+	sshTimeout time.Duration
+}
+
+func (c *RunConfig) Prepare(t *packer.ConfigTemplate) []error {
+	if t == nil {
+		var err error
+		t, err = packer.NewConfigTemplate()
+		if err != nil {
+			return []error{err}
+		}
+	}
+
+	// Defaults
+	if c.SSHUsername == "" {
+		c.SSHUsername = "root"
+	}
+
+	if c.SSHPort == 0 {
+		c.SSHPort = 22
+	}
+
+	if c.RawSSHTimeout == "" {
+		c.RawSSHTimeout = "1m"
+	}
+
+	// Validation
+	var err error
+	errs := make([]error, 0)
+	if c.SourceImage == "" {
+		errs = append(errs, errors.New("A source_image must be specified"))
+	}
+
+	if c.Flavor == "" {
+		errs = append(errs, errors.New("A flavor must be specified"))
+	}
+
+	if c.SSHUsername == "" {
+		errs = append(errs, errors.New("An ssh_username must be specified"))
+	}
+
+	templates := map[string]*string{
+		"flavlor":      &c.Flavor,
+		"ssh_timeout":  &c.RawSSHTimeout,
+		"ssh_username": &c.SSHUsername,
+		"source_image": &c.SourceImage,
+	}
+
+	for n, ptr := range templates {
+		var err error
+		*ptr, err = t.Process(*ptr, nil)
+		if err != nil {
+			errs = append(
+				errs, fmt.Errorf("Error processing %s: %s", n, err))
+		}
+	}
+
+	c.sshTimeout, err = time.ParseDuration(c.RawSSHTimeout)
+	if err != nil {
+		errs = append(errs, fmt.Errorf("Failed parsing ssh_timeout: %s", err))
+	}
+
+	return errs
+}
+
+func (c *RunConfig) SSHTimeout() time.Duration {
+	return c.sshTimeout
+}

builder/openstack/run_config_test.go

@@ -0,0 +1,88 @@
+package openstack
+
+import (
+	"os"
+	"testing"
+)
+
+func init() {
+	// Clear out the openstack env vars so they don't
+	// affect our tests.
+	os.Setenv("SDK_USERNAME", "")
+	os.Setenv("SDK_PASSWORD", "")
+	os.Setenv("SDK_PROVIDER", "")
+}
+
+func testRunConfig() *RunConfig {
+	return &RunConfig{
+		SourceImage: "abcd",
+		Flavor:      "m1.small",
+		SSHUsername: "root",
+	}
+}
+
+func TestRunConfigPrepare(t *testing.T) {
+	c := testRunConfig()
+	err := c.Prepare(nil)
+	if len(err) > 0 {
+		t.Fatalf("err: %s", err)
+	}
+}
+
+func TestRunConfigPrepare_InstanceType(t *testing.T) {
+	c := testRunConfig()
+	c.Flavor = ""
+	if err := c.Prepare(nil); len(err) != 1 {
+		t.Fatalf("err: %s", err)
+	}
+}
+
+func TestRunConfigPrepare_SourceImage(t *testing.T) {
+	c := testRunConfig()
+	c.SourceImage = ""
+	if err := c.Prepare(nil); len(err) != 1 {
+		t.Fatalf("err: %s", err)
+	}
+}
+
+func TestRunConfigPrepare_SSHPort(t *testing.T) {
+	c := testRunConfig()
+	c.SSHPort = 0
+	if err := c.Prepare(nil); len(err) != 0 {
+		t.Fatalf("err: %s", err)
+	}
+
+	if c.SSHPort != 22 {
+		t.Fatalf("invalid value: %d", c.SSHPort)
+	}
+
+	c.SSHPort = 44
+	if err := c.Prepare(nil); len(err) != 0 {
+		t.Fatalf("err: %s", err)
+	}
+
+	if c.SSHPort != 44 {
+		t.Fatalf("invalid value: %d", c.SSHPort)
+	}
+}
+
+func TestRunConfigPrepare_SSHTimeout(t *testing.T) {
+	c := testRunConfig()
+	c.RawSSHTimeout = ""
+	if err := c.Prepare(nil); len(err) != 0 {
+		t.Fatalf("err: %s", err)
+	}
+
+	c.RawSSHTimeout = "bad"
+	if err := c.Prepare(nil); len(err) != 1 {
+		t.Fatalf("err: %s", err)
+	}
+}
+
+func TestRunConfigPrepare_SSHUsername(t *testing.T) {
+	c := testRunConfig()
+	c.SSHUsername = ""
+	if err := c.Prepare(nil); len(err) != 0 {
+		t.Fatalf("err: %s", err)
+	}
+}

builder/openstack/server.go

@@ -0,0 +1,90 @@
+package openstack
+
+import (
+	"errors"
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/rackspace/gophercloud"
+	"log"
+	"time"
+)
+
+// StateRefreshFunc is a function type used for StateChangeConf that is
+// responsible for refreshing the item being watched for a state change.
+//
+// It returns three results. `result` is any object that will be returned
+// as the final object after waiting for state change. This allows you to
+// return the final updated object, for example an openstack instance after
+// refreshing it.
+//
+// `state` is the latest state of that object. And `err` is any error that
+// may have happened while refreshing the state.
+type StateRefreshFunc func() (result interface{}, state string, progress int, err error)
+
+// StateChangeConf is the configuration struct used for `WaitForState`.
+type StateChangeConf struct {
+	Accessor  *gophercloud.Access
+	Api       *gophercloud.ApiCriteria
+	Pending   []string
+	Refresh   StateRefreshFunc
+	StepState map[string]interface{}
+	Target    string
+}
+
+// ServerStateRefreshFunc returns a StateRefreshFunc that is used to watch
+// an openstacn server.
+func ServerStateRefreshFunc(accessor *gophercloud.Access, api *gophercloud.ApiCriteria, s *gophercloud.Server) StateRefreshFunc {
+	return func() (interface{}, string, int, error) {
+		csp, err := gophercloud.ServersApi(accessor, *api)
+		resp, err := csp.ServerById(s.Id)
+		if err != nil {
+			log.Printf("Error on ServerStateRefresh: %s", err)
+			return nil, "", 0, err
+		}
+
+		return resp, resp.Status, resp.Progress, nil
+	}
+}
+
+// WaitForState watches an object and waits for it to achieve a certain
+// state.
+func WaitForState(conf *StateChangeConf) (i interface{}, err error) {
+	log.Printf("Waiting for state to become: %s", conf.Target)
+
+	for {
+		var currentProgress int
+		var currentState string
+		i, currentState, currentProgress, err = conf.Refresh()
+		if err != nil {
+			return
+		}
+
+		if currentState == conf.Target {
+			return
+		}
+
+		if conf.StepState != nil {
+			if _, ok := conf.StepState[multistep.StateCancelled]; ok {
+				return nil, errors.New("interrupted")
+			}
+		}
+
+		found := false
+		for _, allowed := range conf.Pending {
+			if currentState == allowed {
+				found = true
+				break
+			}
+		}
+
+		if !found {
+			fmt.Errorf("unexpected state '%s', wanted target '%s'", currentState, conf.Target)
+			return
+		}
+
+		log.Printf("Waiting for state to become: %s currently %s (%d%%)", conf.Target, currentState, currentProgress)
+		time.Sleep(2 * time.Second)
+	}
+
+	return
+}

builder/openstack/ssh.go

@@ -0,0 +1,55 @@
+package openstack
+
+import (
+	gossh "code.google.com/p/go.crypto/ssh"
+	"errors"
+	"fmt"
+	"github.com/mitchellh/packer/communicator/ssh"
+	"github.com/rackspace/gophercloud"
+	"time"
+)
+
+// SSHAddress returns a function that can be given to the SSH communicator
+// for determining the SSH address based on the server AccessIPv4 setting..
+func SSHAddress(accessor *gophercloud.AccessProvider, api *gophercloud.ApiCriteria, port int) func(map[string]interface{}) (string, error) {
+	return func(state map[string]interface{}) (string, error) {
+		for j := 0; j < 2; j++ {
+			s := state["server"].(*gophercloud.Server)
+			if s.AccessIPv4 != "" {
+				return fmt.Sprintf("%s:%d", s.AccessIPv4, port), nil
+			}
+			csp, err := gophercloud.ServersApi(*accessor, *api)
+			serverState, err := csp.ServerById(s.Id)
+
+			if err != nil {
+				return "", err
+			}
+
+			state["server"] = serverState
+			time.Sleep(1 * time.Second)
+		}
+
+		return "", errors.New("couldn't determine IP address for server")
+	}
+}
+
+// SSHConfig returns a function that can be used for the SSH communicator
+// config for connecting to the instance created over SSH using the generated
+// private key.
+func SSHConfig(username string) func(map[string]interface{}) (*gossh.ClientConfig, error) {
+	return func(state map[string]interface{}) (*gossh.ClientConfig, error) {
+		privateKey := state["privateKey"].(string)
+
+		keyring := new(ssh.SimpleKeychain)
+		if err := keyring.AddPEMKey(privateKey); err != nil {
+			return nil, fmt.Errorf("Error setting up SSH config: %s", err)
+		}
+
+		return &gossh.ClientConfig{
+			User: username,
+			Auth: []gossh.ClientAuth{
+				gossh.ClientAuthKeyring(keyring),
+			},
+		}, nil
+	}
+}

builder/openstack/step_create_image.go

@@ -0,0 +1,71 @@
+package openstack
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"github.com/rackspace/gophercloud"
+	"log"
+	"time"
+)
+
+type stepCreateImage struct{}
+
+func (s *stepCreateImage) Run(state map[string]interface{}) multistep.StepAction {
+	accessor := state["accessor"].(*gophercloud.Access)
+	api := state["api"].(*gophercloud.ApiCriteria)
+	config := state["config"].(config)
+	server := state["server"].(*gophercloud.Server)
+	ui := state["ui"].(packer.Ui)
+
+	// Create the image
+	ui.Say(fmt.Sprintf("Creating the image: %s", config.ImageName))
+	createOpts := gophercloud.CreateImage{
+		Name: config.ImageName,
+	}
+	csp, err := gophercloud.ServersApi(accessor, *api)
+	imageId, err := csp.CreateImage(server.Id, createOpts)
+	if err != nil {
+		err := fmt.Errorf("Error creating image: %s", err)
+		state["error"] = err
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	// Set the Image ID in the state
+	ui.Say(fmt.Sprintf("Image: %s", imageId))
+	state["image"] = imageId
+
+	// Wait for the image to become ready
+	ui.Say("Waiting for image to become ready...")
+	if err := WaitForImage(accessor, api, imageId); err != nil {
+		err := fmt.Errorf("Error waiting for image: %s", err)
+		state["error"] = err
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *stepCreateImage) Cleanup(map[string]interface{}) {
+	// No cleanup...
+}
+
+// WaitForImage waits for the given Image ID to become ready.
+func WaitForImage(accessor *gophercloud.Access, api *gophercloud.ApiCriteria, imageId string) error {
+	for {
+		csp, err := gophercloud.ServersApi(accessor, *api)
+		image, err := csp.ImageById(imageId)
+		if err != nil {
+			return err
+		}
+
+		if image.Status == "ACTIVE" {
+			return nil
+		}
+
+		log.Printf("Waiting for image creation status: %s (%d%%)", image.Status, image.Progress)
+		time.Sleep(2 * time.Second)
+	}
+}

builder/openstack/step_key_pair.go

@@ -0,0 +1,59 @@
+package openstack
+
+import (
+	"cgl.tideland.biz/identifier"
+	"encoding/hex"
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"github.com/rackspace/gophercloud"
+	"log"
+)
+
+type StepKeyPair struct {
+	keyName string
+}
+
+func (s *StepKeyPair) Run(state map[string]interface{}) multistep.StepAction {
+	accessor := state["accessor"].(*gophercloud.Access)
+	api := state["api"].(*gophercloud.ApiCriteria)
+	ui := state["ui"].(packer.Ui)
+
+	ui.Say("Creating temporary keypair for this instance...")
+	keyName := fmt.Sprintf("packer %s", hex.EncodeToString(identifier.NewUUID().Raw()))
+	log.Printf("temporary keypair name: %s", keyName)
+	csp, err := gophercloud.ServersApi(accessor, *api)
+	keyResp, err := csp.CreateKeyPair(gophercloud.NewKeyPair{Name: keyName})
+	if err != nil {
+		state["error"] = fmt.Errorf("Error creating temporary keypair: %s", err)
+		return multistep.ActionHalt
+	}
+
+	// Set the keyname so we know to delete it later
+	s.keyName = keyName
+
+	// Set some state data for use in future steps
+	state["keyPair"] = keyName
+	state["privateKey"] = keyResp.PrivateKey
+
+	return multistep.ActionContinue
+}
+
+func (s *StepKeyPair) Cleanup(state map[string]interface{}) {
+	// If no key name is set, then we never created it, so just return
+	if s.keyName == "" {
+		return
+	}
+
+	accessor := state["accessor"].(*gophercloud.Access)
+	api := state["api"].(*gophercloud.ApiCriteria)
+	ui := state["ui"].(packer.Ui)
+
+	ui.Say("Deleting temporary keypair...")
+	csp, err := gophercloud.ServersApi(accessor, *api)
+	err = csp.DeleteKeyPair(s.keyName)
+	if err != nil {
+		ui.Error(fmt.Sprintf(
+			"Error cleaning up keypair. Please delete the key manually: %s", s.keyName))
+	}
+}

builder/openstack/step_run_source_server.go

@@ -0,0 +1,108 @@
+package openstack
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"github.com/rackspace/gophercloud"
+	"log"
+)
+
+type StepRunSourceServer struct {
+	Flavor      string
+	Name        string
+	SourceImage string
+
+	server *gophercloud.Server
+}
+
+func (s *StepRunSourceServer) Run(state map[string]interface{}) multistep.StepAction {
+	accessor := state["accessor"].(*gophercloud.Access)
+	api := state["api"].(*gophercloud.ApiCriteria)
+	keyName := state["keyPair"].(string)
+	ui := state["ui"].(packer.Ui)
+
+	csp, err := gophercloud.ServersApi(accessor, *api)
+	if err != nil {
+		err := fmt.Errorf("Error connecting to api: %s", err)
+		state["error"] = err
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	// XXX - validate image and flavor is available
+
+	server := gophercloud.NewServer{
+		Name:        s.Name,
+		ImageRef:    s.SourceImage,
+		FlavorRef:   s.Flavor,
+		KeyPairName: keyName,
+	}
+
+	serverResp, err := csp.CreateServer(server)
+	if err != nil {
+		err := fmt.Errorf("Error launching source server: %s", err)
+		state["error"] = err
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	s.server, err = csp.ServerById(serverResp.Id)
+	log.Printf("server id: %s", s.server.Id)
+
+	ui.Say(fmt.Sprintf("Waiting for server (%s) to become ready...", s.server.Id))
+	stateChange := StateChangeConf{
+		Accessor:  accessor,
+		Api:       api,
+		Pending:   []string{"BUILD"},
+		Target:    "ACTIVE",
+		Refresh:   ServerStateRefreshFunc(accessor, api, s.server),
+		StepState: state,
+	}
+	latestServer, err := WaitForState(&stateChange)
+	if err != nil {
+		err := fmt.Errorf("Error waiting for server (%s) to become ready: %s", s.server.Id, err)
+		state["error"] = err
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	s.server = latestServer.(*gophercloud.Server)
+	state["server"] = s.server
+
+	return multistep.ActionContinue
+}
+
+func (s *StepRunSourceServer) Cleanup(state map[string]interface{}) {
+	if s.server == nil {
+		return
+	}
+
+	accessor := state["accessor"].(*gophercloud.Access)
+	api := state["api"].(*gophercloud.ApiCriteria)
+	ui := state["ui"].(packer.Ui)
+
+	csp, err := gophercloud.ServersApi(accessor, *api)
+	if err != nil {
+		err := fmt.Errorf("Error connecting to api: %s", err)
+		state["error"] = err
+		ui.Error(err.Error())
+		return
+	}
+
+	ui.Say("Terminating the source server...")
+	if err := csp.DeleteServerById(s.server.Id); err != nil {
+		ui.Error(fmt.Sprintf("Error terminating server, may still be around: %s", err))
+		return
+	}
+
+	stateChange := StateChangeConf{
+		Accessor: accessor,
+		Api:      api,
+		Pending:  []string{"ACTIVE", "BUILD", "REBUILD", "SUSPENDED"},
+		Refresh:  ServerStateRefreshFunc(accessor, api, s.server),
+		Target:   "DELETED",
+	}
+
+	WaitForState(&stateChange)
+}

config.go

@@ -23,6 +23,7 @@ const defaultConfig = `
 		"amazon-chroot": "packer-builder-amazon-chroot",
 		"amazon-instance": "packer-builder-amazon-instance",
 		"digitalocean": "packer-builder-digitalocean",
+		"openstack": "packer-builder-openstack",
 		"virtualbox": "packer-builder-virtualbox",
 		"vmware": "packer-builder-vmware"
 	},

plugin/builder-openstack/main.go

@@ -0,0 +1,10 @@
+package main
+
+import (
+	"github.com/mitchellh/packer/builder/openstack"
+	"github.com/mitchellh/packer/packer/plugin"
+)
+
+func main() {
+	plugin.ServeBuilder(new(openstack.Builder))
+}

plugin/builder-openstack/main_test.go

@@ -0,0 +1 @@
+package main