Merge pull request #746 from devcamcar/openstack-key-logging

builder/openstack: added keypair logging for debugging to OpenStack builder

builder/openstack/builder.go

@@ -4,7 +4,7 @@
 package openstack
 
 import (
-	//"fmt"
+	"fmt"
 	"github.com/mitchellh/multistep"
 	"github.com/mitchellh/packer/common"
 	"github.com/mitchellh/packer/packer"
@@ -81,7 +81,10 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 
 	// Build the steps
 	steps := []multistep.Step{
-		&StepKeyPair{},
+		&StepKeyPair{
+			Debug:        b.config.PackerDebug,
+			DebugKeyPath: fmt.Sprintf("os_%s.pem", b.config.PackerBuildName),
+        },
 		&StepRunSourceServer{
 			Name:        b.config.ImageName,
 			Flavor:      b.config.Flavor,

builder/openstack/step_key_pair.go

@@ -7,10 +7,14 @@ import (
 	"github.com/mitchellh/packer/packer"
 	"github.com/rackspace/gophercloud"
 	"log"
+    "os"
+    "runtime"
 )
 
 type StepKeyPair struct {
-	keyName string
+	Debug        bool
+	DebugKeyPath string
+	keyName      string
 }
 
 func (s *StepKeyPair) Run(state multistep.StateBag) multistep.StepAction {
@@ -26,6 +30,32 @@ func (s *StepKeyPair) Run(state multistep.StateBag) multistep.StepAction {
 		return multistep.ActionHalt
 	}
 
+	// If we're in debug mode, output the private key to the working
+	// directory.
+	if s.Debug {
+		ui.Message(fmt.Sprintf("Saving key for debug purposes: %s", s.DebugKeyPath))
+		f, err := os.Create(s.DebugKeyPath)
+		if err != nil {
+			state.Put("error", fmt.Errorf("Error saving debug key: %s", err))
+			return multistep.ActionHalt
+		}
+		defer f.Close()
+
+		// Write the key out
+		if _, err := f.Write([]byte(keyResp.PrivateKey)); err != nil {
+			state.Put("error", fmt.Errorf("Error saving debug key: %s", err))
+			return multistep.ActionHalt
+		}
+
+		// Chmod it so that it is SSH ready
+		if runtime.GOOS != "windows" {
+			if err := f.Chmod(0600); err != nil {
+				state.Put("error", fmt.Errorf("Error setting permissions of debug key: %s", err))
+				return multistep.ActionHalt
+			}
+		}
+	}
+
 	// Set the keyname so we know to delete it later
 	s.keyName = keyName