From 4ef3874467c5fa977818bc2393e8d87c4fc8e6e9 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Tue, 2 Sep 2014 09:35:59 -0700
Subject: [PATCH] builder/virtualbox-*: seed RNG [GH-1386]

---
 CHANGELOG.md                      |  1 +
 builder/virtualbox/iso/builder.go | 10 ++++++++--
 builder/virtualbox/ovf/builder.go |  5 +++++
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96141fd2e..d9fc8acd5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ BUG FIXES:
   * builder/parallels/all: Add support for Parallels Desktop 10 [GH-1438]
   * builder/parallels/all: Added some navigation keys [GH-1442]
   * builder/qemu: If headless, sdl display won't be used. [GH-1395]
+  * builder/virtualbox/all: Seed RNG to avoid same ports. [GH-1386]
   * builder/vmware/all: `ssh_host` accepts templates. [GH-1396]
   * builder/vmware/vmx: Do not re-add floppy disk files to VMX [GH-1361]
 
diff --git a/builder/virtualbox/iso/builder.go b/builder/virtualbox/iso/builder.go
index f41118a45..a632ca694 100644
--- a/builder/virtualbox/iso/builder.go
+++ b/builder/virtualbox/iso/builder.go
@@ -3,12 +3,15 @@ package iso
 import (
 	"errors"
 	"fmt"
+	"log"
+	"math/rand"
+	"strings"
+	"time"
+
 	"github.com/mitchellh/multistep"
 	vboxcommon "github.com/mitchellh/packer/builder/virtualbox/common"
 	"github.com/mitchellh/packer/common"
 	"github.com/mitchellh/packer/packer"
-	"log"
-	"strings"
 )
 
 const BuilderId = "mitchellh.virtualbox"
@@ -254,6 +257,9 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 }
 
 func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
+	// Seed the random number generator
+	rand.Seed(time.Now().UTC().UnixNano())
+
 	// Create the driver that we'll use to communicate with VirtualBox
 	driver, err := vboxcommon.NewDriver()
 	if err != nil {
diff --git a/builder/virtualbox/ovf/builder.go b/builder/virtualbox/ovf/builder.go
index 312fc4701..398b34a7a 100644
--- a/builder/virtualbox/ovf/builder.go
+++ b/builder/virtualbox/ovf/builder.go
@@ -4,6 +4,8 @@ import (
 	"errors"
 	"fmt"
 	"log"
+	"math/rand"
+	"time"
 
 	"github.com/mitchellh/multistep"
 	vboxcommon "github.com/mitchellh/packer/builder/virtualbox/common"
@@ -32,6 +34,9 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 // Run executes a Packer build and returns a packer.Artifact representing
 // a VirtualBox appliance.
 func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
+	// Seed the random number generator
+	rand.Seed(time.Now().UTC().UnixNano())
+
 	// Create the driver that we'll use to communicate with VirtualBox
 	driver, err := vboxcommon.NewDriver()
 	if err != nil {