builder/amazon/all: TemporaryKeyPairName

/cc @whostolebenfrog - I actually simplified things quite a bit. I added
a "uuid" global template function so it just uses that now. I renamed it
so that it is clear it is a temporary keypair.

builder/amazon/common/run_config.go

@@ -21,8 +21,8 @@ type RunConfig struct {
 	SSHPort              int    `mapstructure:"ssh_port"`
 	SecurityGroupId      string `mapstructure:"security_group_id"`
 	SubnetId             string `mapstructure:"subnet_id"`
+	TemporaryKeyPairName string `mapstructure:"temporary_key_pair_name"`
 	VpcId                string `mapstructure:"vpc_id"`
-	SSHKeyPairPattern  string `mapstructure:"ssh_keypair_pattern"`
 
 	// Unexported fields that are calculated from others
 	sshTimeout time.Duration
@@ -46,8 +46,8 @@ func (c *RunConfig) Prepare(t *packer.ConfigTemplate) []error {
 		c.RawSSHTimeout = "1m"
 	}
 
-	if c.SSHKeyPairPattern == "" {
-		c.SSHKeyPairPattern = "packer %s"
+	if c.TemporaryKeyPairName == "" {
+		c.TemporaryKeyPairName = "packer {{uuid}}"
 	}
 
 	// Validation
@@ -81,6 +81,7 @@ func (c *RunConfig) Prepare(t *packer.ConfigTemplate) []error {
 		"ssh_username":            &c.SSHUsername,
 		"source_ami":              &c.SourceAmi,
 		"subnet_id":               &c.SubnetId,
+		"temporary_key_pair_name": &c.TemporaryKeyPairName,
 		"vpc_id":                  &c.VpcId,
 	}
 

builder/amazon/common/run_config_test.go

@@ -127,23 +127,14 @@ func TestRunConfigPrepare_UserDataFile(t *testing.T) {
 	}
 }
 
-func TestRunConfigPrepare_SSHKeyPairPattern(t *testing.T) {
+func TestRunConfigPrepare_TemporaryKeyPairName(t *testing.T) {
 	c := testConfig()
-	c.SSHKeyPairPattern = ""
+	c.TemporaryKeyPairName = ""
 	if err := c.Prepare(nil); len(err) != 0 {
 		t.Fatalf("err: %s", err)
 	}
 
-	if c.SSHKeyPairPattern != "packer %s" {
-		t.Fatalf("invalid value: %s", c.SSHKeyPairPattern)
-	}
-
-	c.SSHKeyPairPattern = "valid-%s"
-	if err := c.Prepare(nil); len(err) != 0 {
-		t.Fatalf("err: %s", err)
-	}
-
-	if c.SSHKeyPairPattern != "valid-%s" {
-		t.Fatalf("invalid value: %s", c.SSHKeyPairPattern)
+	if c.TemporaryKeyPairName == "" {
+		t.Fatal("keypair empty")
 	}
 }

builder/amazon/common/step_key_pair.go

 package common
 
 import (
-	"cgl.tideland.biz/identifier"
-	"encoding/hex"
 	"fmt"
 	"github.com/mitchellh/goamz/ec2"
 	"github.com/mitchellh/multistep"
 	"github.com/mitchellh/packer/packer"
-	"log"
 	"os"
 	"runtime"
 )
@@ -15,7 +12,7 @@ import (
 type StepKeyPair struct {
 	Debug        bool
 	DebugKeyPath string
-	KeyPairPattern string
+	KeyPairName  string
 
 	keyName string
 }
@@ -24,20 +21,18 @@ func (s *StepKeyPair) Run(state multistep.StateBag) multistep.StepAction {
 	ec2conn := state.Get("ec2").(*ec2.EC2)
 	ui := state.Get("ui").(packer.Ui)
 
-	ui.Say("Creating temporary keypair for this instance...")
-	keyName := fmt.Sprintf(s.KeyPairPattern, hex.EncodeToString(identifier.NewUUID().Raw()))
-	log.Printf("temporary keypair name: %s", keyName)
-	keyResp, err := ec2conn.CreateKeyPair(keyName)
+	ui.Say(fmt.Sprintf("Creating temporary keypair: %s", s.KeyPairName))
+	keyResp, err := ec2conn.CreateKeyPair(s.KeyPairName)
 	if err != nil {
 		state.Put("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
+	s.keyName = s.KeyPairName
 
 	// Set some state data for use in future steps
-	state.Put("keyPair", keyName)
+	state.Put("keyPair", s.keyName)
 	state.Put("privateKey", keyResp.KeyMaterial)
 
 	// If we're in debug mode, output the private key to the working

builder/amazon/ebs/builder.go

@@ -84,7 +84,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		&awscommon.StepKeyPair{
 			Debug:        b.config.PackerDebug,
 			DebugKeyPath: fmt.Sprintf("ec2_%s.pem", b.config.PackerBuildName),
-			KeyPairPattern: b.config.SSHKeyPairPattern,
+			KeyPairName:  b.config.TemporaryKeyPairName,
 		},
 		&awscommon.StepSecurityGroup{
 			SecurityGroupId: b.config.SecurityGroupId,

builder/amazon/instance/builder.go

@@ -187,6 +187,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		&awscommon.StepKeyPair{
 			Debug:        b.config.PackerDebug,
 			DebugKeyPath: fmt.Sprintf("ec2_%s.pem", b.config.PackerBuildName),
+			KeyPairName:  b.config.TemporaryKeyPairName,
 		},
 		&awscommon.StepSecurityGroup{
 			SecurityGroupId: b.config.SecurityGroupId,