builder/amazon: Allow using ssh_private_key_file and ssh_password

This adds support for using amazon-ebs/amazon-instance builder without
a keypair. If a ssh_private_key_file is supplied without a
ssh_keypair_name no temporary ssh keypair is created. If ssh_password is
used no temporary ssh keypair is created and the password is used when
trying to connect.

Closes #2301
Closes #3156

builder/amazon/common/run_config.go

@@ -44,14 +44,14 @@ type RunConfig struct {
 }
 
 func (c *RunConfig) Prepare(ctx *interpolate.Context) []error {
-	// If we are not given an explicit ssh_keypair_name,
-	// then create a temporary one, but only if the
-	// temporary_key_pair_name has not been provided.
-	if c.SSHKeyPairName == "" {
-		if c.TemporaryKeyPairName == "" {
-			c.TemporaryKeyPairName = fmt.Sprintf(
-				"packer_%s", uuid.TimeOrderedUUID())
-		}
+	// If we are not given an explicit ssh_keypair_name or
+	// ssh_private_key_file, then create a temporary one, but only if the
+	// temporary_key_pair_name has not been provided and we are not using
+	// ssh_password.
+	if c.SSHKeyPairName == "" && c.TemporaryKeyPairName == "" &&
+		c.Comm.SSHPrivateKey == "" && c.Comm.SSHPassword == "" {
+
+		c.TemporaryKeyPairName = fmt.Sprintf("packer_%s", uuid.TimeOrderedUUID())
 	}
 
 	if c.WindowsPasswordTimeout == 0 {

builder/amazon/common/ssh.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/aws/aws-sdk-go/service/ec2"
 	"github.com/mitchellh/multistep"
+	packerssh "github.com/mitchellh/packer/communicator/ssh"
 	"golang.org/x/crypto/ssh"
 )
 
@@ -64,22 +65,33 @@ func SSHHost(e ec2Describer, private bool) func(multistep.StateBag) (string, err
 }
 
 // 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(multistep.StateBag) (*ssh.ClientConfig, error) {
+// config for connecting to the instance created over SSH using the private key
+// or password.
+func SSHConfig(username, password string) func(multistep.StateBag) (*ssh.ClientConfig, error) {
 	return func(state multistep.StateBag) (*ssh.ClientConfig, error) {
-		privateKey := state.Get("privateKey").(string)
 
-		signer, err := ssh.ParsePrivateKey([]byte(privateKey))
+		privateKey, hasKey := state.GetOk("privateKey")
+		if hasKey {
+
+			signer, err := ssh.ParsePrivateKey([]byte(privateKey.(string)))
 			if err != nil {
 				return nil, fmt.Errorf("Error setting up SSH config: %s", err)
 			}
-
 			return &ssh.ClientConfig{
 				User: username,
 				Auth: []ssh.AuthMethod{
 					ssh.PublicKeys(signer),
 				},
 			}, nil
+
+		} else {
+			return &ssh.ClientConfig{
+				User: username,
+				Auth: []ssh.AuthMethod{
+					ssh.Password(password),
+					ssh.KeyboardInteractive(
+						packerssh.PasswordKeyboardInteractive(password)),
+				}}, nil
+		}
 	}
 }

builder/amazon/common/step_key_pair.go

@@ -22,7 +22,10 @@ type StepKeyPair struct {
 }
 
 func (s *StepKeyPair) Run(state multistep.StateBag) multistep.StepAction {
+	ui := state.Get("ui").(packer.Ui)
+
 	if s.PrivateKeyFile != "" {
+		ui.Say("Using existing ssh private key")
 		privateKeyBytes, err := ioutil.ReadFile(s.PrivateKeyFile)
 		if err != nil {
 			state.Put("error", fmt.Errorf(
@@ -36,8 +39,13 @@ func (s *StepKeyPair) Run(state multistep.StateBag) multistep.StepAction {
 		return multistep.ActionContinue
 	}
 
+	if s.TemporaryKeyPairName == "" {
+		ui.Say("Not using temporary keypair")
+		state.Put("keyPair", "")
+		return multistep.ActionContinue
+	}
+
 	ec2conn := state.Get("ec2").(*ec2.EC2)
-	ui := state.Get("ui").(packer.Ui)
 
 	ui.Say(fmt.Sprintf("Creating temporary keypair: %s", s.TemporaryKeyPairName))
 	keyResp, err := ec2conn.CreateKeyPair(&ec2.CreateKeyPairInput{
@@ -87,7 +95,7 @@ func (s *StepKeyPair) Cleanup(state multistep.StateBag) {
 	// If no key name is set, then we never created it, so just return
 	// If we used an SSH private key file, do not go about deleting
 	// keypairs
-	if s.PrivateKeyFile != "" {
+	if s.PrivateKeyFile != "" || s.KeyPairName == "" {
 		return
 	}
 

builder/amazon/common/step_run_source_instance.go

@@ -160,7 +160,6 @@ func (s *StepRunSourceInstance) Run(state multistep.StateBag) multistep.StepActi
 
 	if spotPrice == "" || spotPrice == "0" {
 		runOpts := &ec2.RunInstancesInput{
-			KeyName:             &keyName,
 			ImageId:             &s.SourceAMI,
 			InstanceType:        &s.InstanceType,
 			UserData:            &userData,
@@ -172,6 +171,10 @@ func (s *StepRunSourceInstance) Run(state multistep.StateBag) multistep.StepActi
 			EbsOptimized:        &s.EbsOptimized,
 		}
 
+		if keyName != "" {
+			runOpts.KeyName = &keyName
+		}
+
 		if s.SubnetId != "" && s.AssociatePublicIpAddress {
 			runOpts.NetworkInterfaces = []*ec2.InstanceNetworkInterfaceSpecification{
 				&ec2.InstanceNetworkInterfaceSpecification{
@@ -203,10 +206,8 @@ func (s *StepRunSourceInstance) Run(state multistep.StateBag) multistep.StepActi
 		ui.Message(fmt.Sprintf(
 			"Requesting spot instance '%s' for: %s",
 			s.InstanceType, spotPrice))
-		runSpotResp, err := ec2conn.RequestSpotInstances(&ec2.RequestSpotInstancesInput{
-			SpotPrice: &spotPrice,
-			LaunchSpecification: &ec2.RequestSpotLaunchSpecification{
-				KeyName:            &keyName,
+
+		runOpts := &ec2.RequestSpotLaunchSpecification{
 			ImageId:            &s.SourceAMI,
 			InstanceType:       &s.InstanceType,
 			UserData:           &userData,
@@ -225,7 +226,15 @@ func (s *StepRunSourceInstance) Run(state multistep.StateBag) multistep.StepActi
 			},
 			BlockDeviceMappings: s.BlockDevices.BuildLaunchDevices(),
 			EbsOptimized:        &s.EbsOptimized,
-			},
+		}
+
+		if keyName != "" {
+			runOpts.KeyName = &keyName
+		}
+
+		runSpotResp, err := ec2conn.RequestSpotInstances(&ec2.RequestSpotInstancesInput{
+			SpotPrice:           &spotPrice,
+			LaunchSpecification: runOpts,
 		})
 		if err != nil {
 			err := fmt.Errorf("Error launching source spot instance: %s", err)

builder/amazon/ebs/builder.go

@@ -148,7 +148,8 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 				ec2conn,
 				b.config.SSHPrivateIp),
 			SSHConfig: awscommon.SSHConfig(
-				b.config.RunConfig.Comm.SSHUsername),
+				b.config.RunConfig.Comm.SSHUsername,
+				b.config.RunConfig.Comm.SSHPassword),
 		},
 		&common.StepProvision{},
 		&stepStopInstance{

builder/amazon/instance/builder.go

@@ -230,7 +230,8 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 				ec2conn,
 				b.config.SSHPrivateIp),
 			SSHConfig: awscommon.SSHConfig(
-				b.config.RunConfig.Comm.SSHUsername),
+				b.config.RunConfig.Comm.SSHUsername,
+				b.config.RunConfig.Comm.SSHPassword),
 		},
 		&common.StepProvision{},
 		&StepUploadX509Cert{},