Add option to enable enhanced networking (SriovNetSupport) for images.

builder/amazon/chroot/builder.go

@@ -7,13 +7,14 @@ package chroot
 import (
 	"errors"
 	"fmt"
+	"log"
+	"runtime"
+
 	"github.com/mitchellh/goamz/ec2"
 	"github.com/mitchellh/multistep"
 	awscommon "github.com/mitchellh/packer/builder/amazon/common"
 	"github.com/mitchellh/packer/common"
 	"github.com/mitchellh/packer/packer"
-	"log"
-	"runtime"
 )
 
 // The unique ID for this builder
@@ -182,7 +183,11 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 	// Build the steps
 	steps := []multistep.Step{
 		&StepInstanceInfo{},
-		&StepSourceAMIInfo{},
+		&awscommon.StepSourceAMIInfo{
+			SourceAmi:          b.config.SourceAmi,
+			EnhancedNetworking: b.config.AMIEnhancedNetworking,
+		},
+		&StepCheckRootDevice{},
 		&StepFlock{},
 		&StepPrepareDevice{},
 		&StepCreateVolume{},

builder/amazon/chroot/step_check_root_device.go

@@ -0,0 +1,31 @@
+package chroot
+
+import (
+	"fmt"
+
+	"github.com/mitchellh/goamz/ec2"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+// StepCheckRootDevice makes sure the root device on the AMI is EBS-backed.
+type StepCheckRootDevice struct{}
+
+func (s *StepCheckRootDevice) Run(state multistep.StateBag) multistep.StepAction {
+	image := state.Get("ec2").(*ec2.Image)
+	ui := state.Get("ui").(packer.Ui)
+
+	ui.Say("Checking the root device on source AMI...")
+
+	// It must be EBS-backed otherwise the build won't work
+	if image.RootDeviceType != "ebs" {
+		err := fmt.Errorf("The root device of the source AMI must be EBS-backed.")
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepCheckRootDevice) Cleanup(multistep.StateBag) {}

builder/amazon/chroot/step_register_ami.go

@@ -2,6 +2,7 @@ package chroot
 
 import (
 	"fmt"
+
 	"github.com/mitchellh/goamz/ec2"
 	"github.com/mitchellh/multistep"
 	awscommon "github.com/mitchellh/packer/builder/amazon/common"
@@ -38,6 +39,11 @@ func (s *StepRegisterAMI) Run(state multistep.StateBag) multistep.StepAction {
 		BlockDevices:   blockDevices,
 	}
 
+	// Set SriovNetSupport to "simple". See http://goo.gl/icuXh5
+	if config.AMIEnhancedNetworking {
+		registerOpts.SriovNetSupport = "simple"
+	}
+
 	registerResp, err := ec2conn.RegisterImage(registerOpts)
 	if err != nil {
 		state.Put("error", fmt.Errorf("Error registering AMI: %s", err))

builder/amazon/common/ami_config.go

@@ -2,6 +2,7 @@ package common
 
 import (
 	"fmt"
+
 	"github.com/mitchellh/goamz/aws"
 	"github.com/mitchellh/packer/packer"
 )
@@ -16,6 +17,7 @@ type AMIConfig struct {
 	AMIProductCodes       []string          `mapstructure:"ami_product_codes"`
 	AMIRegions            []string          `mapstructure:"ami_regions"`
 	AMITags               map[string]string `mapstructure:"tags"`
+	AMIEnhancedNetworking bool              `mapstructure:"enhanced_networking"`
 }
 
 func (c *AMIConfig) Prepare(t *packer.ConfigTemplate) []error {

builder/amazon/common/step_source_ami_info.go

@@ -1,7 +1,8 @@
-package chroot
+package common
 
 import (
 	"fmt"
+
 	"github.com/mitchellh/goamz/ec2"
 	"github.com/mitchellh/multistep"
 	"github.com/mitchellh/packer/packer"
@@ -12,15 +13,17 @@ import (
 //
 // Produces:
 //   source_image *ec2.Image - the source AMI info
-type StepSourceAMIInfo struct{}
+type StepSourceAMIInfo struct {
+	SourceAmi          string
+	EnhancedNetworking bool
+}
 
 func (s *StepSourceAMIInfo) Run(state multistep.StateBag) multistep.StepAction {
-	config := state.Get("config").(*Config)
 	ec2conn := state.Get("ec2").(*ec2.EC2)
 	ui := state.Get("ui").(packer.Ui)
 
 	ui.Say("Inspecting the source AMI...")
-	imageResp, err := ec2conn.Images([]string{config.SourceAmi}, ec2.NewFilter())
+	imageResp, err := ec2conn.Images([]string{s.SourceAmi}, ec2.NewFilter())
 	if err != nil {
 		err := fmt.Errorf("Error querying AMI: %s", err)
 		state.Put("error", err)
@@ -29,7 +32,7 @@ func (s *StepSourceAMIInfo) Run(state multistep.StateBag) multistep.StepAction {
 	}
 
 	if len(imageResp.Images) == 0 {
-		err := fmt.Errorf("Source AMI '%s' was not found!", config.SourceAmi)
+		err := fmt.Errorf("Source AMI '%s' was not found!", s.SourceAmi)
 		state.Put("error", err)
 		ui.Error(err.Error())
 		return multistep.ActionHalt
@@ -37,9 +40,10 @@ func (s *StepSourceAMIInfo) Run(state multistep.StateBag) multistep.StepAction {
 
 	image := &imageResp.Images[0]
 
-	// It must be EBS-backed otherwise the build won't work
+	// Enhanced Networking (SriovNetSupport) can only be enabled on HVM AMIs.
-	if image.RootDeviceType != "ebs" {
+	// See http://goo.gl/icuXh5
-		err := fmt.Errorf("The root device of the source AMI must be EBS-backed.")
+	if s.EnhancedNetworking && image.VirtualizationType != "hvm" {
+		err := fmt.Errorf("Cannot enable enhanced networking, source AMI '%s' is not HVM", s.SourceAmi)
 		state.Put("error", err)
 		ui.Error(err.Error())
 		return multistep.ActionHalt

builder/amazon/ebs/builder.go

@@ -7,12 +7,13 @@ package ebs
 
 import (
 	"fmt"
+	"log"
+
 	"github.com/mitchellh/goamz/ec2"
 	"github.com/mitchellh/multistep"
 	awscommon "github.com/mitchellh/packer/builder/amazon/common"
 	"github.com/mitchellh/packer/common"
 	"github.com/mitchellh/packer/packer"
-	"log"
 )
 
 // The unique ID for this builder
@@ -82,6 +83,10 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 
 	// Build the steps
 	steps := []multistep.Step{
+		&awscommon.StepSourceAMIInfo{
+			SourceAmi:          b.config.SourceAmi,
+			EnhancedNetworking: b.config.AMIEnhancedNetworking,
+		},
 		&awscommon.StepKeyPair{
 			Debug:          b.config.PackerDebug,
 			DebugKeyPath:   fmt.Sprintf("ec2_%s.pem", b.config.PackerBuildName),
@@ -114,6 +119,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		},
 		&common.StepProvision{},
 		&stepStopInstance{},
+		&stepModifyInstance{},
 		&stepCreateAMI{},
 		&awscommon.StepAMIRegionCopy{
 			Regions: b.config.AMIRegions,

builder/amazon/ebs/step_modify_instance.go

@@ -0,0 +1,39 @@
+package ebs
+
+import (
+	"fmt"
+
+	"github.com/mitchellh/goamz/ec2"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type stepModifyInstance struct{}
+
+func (s *stepModifyInstance) Run(state multistep.StateBag) multistep.StepAction {
+	config := state.Get("config").(config)
+	ec2conn := state.Get("ec2").(*ec2.EC2)
+	instance := state.Get("instance").(*ec2.Instance)
+	ui := state.Get("ui").(packer.Ui)
+
+	// Set SriovNetSupport to "simple". See http://goo.gl/icuXh5
+	if config.AMIEnhancedNetworking {
+		ui.Say("Enabling Enhanced Networking...")
+		_, err := ec2conn.ModifyInstance(
+			instance.InstanceId,
+			&ec2.ModifyInstance{SriovNetSupport: true},
+		)
+		if err != nil {
+			err := fmt.Errorf("Error enabling Enhanced Networking on %s: %s", instance.InstanceId, err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *stepModifyInstance) Cleanup(state multistep.StateBag) {
+	// No cleanup...
+}

builder/amazon/instance/builder.go

@@ -5,14 +5,15 @@ package instance
 import (
 	"errors"
 	"fmt"
+	"log"
+	"os"
+	"strings"
+
 	"github.com/mitchellh/goamz/ec2"
 	"github.com/mitchellh/multistep"
 	awscommon "github.com/mitchellh/packer/builder/amazon/common"
 	"github.com/mitchellh/packer/common"
 	"github.com/mitchellh/packer/packer"
-	"log"
-	"os"
-	"strings"
 )
 
 // The unique ID for this builder
@@ -186,6 +187,10 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 
 	// Build the steps
 	steps := []multistep.Step{
+		&awscommon.StepSourceAMIInfo{
+			SourceAmi:          b.config.SourceAmi,
+			EnhancedNetworking: b.config.AMIEnhancedNetworking,
+		},
 		&awscommon.StepKeyPair{
 			Debug:          b.config.PackerDebug,
 			DebugKeyPath:   fmt.Sprintf("ec2_%s.pem", b.config.PackerBuildName),

builder/amazon/instance/step_register_ami.go

@@ -2,6 +2,7 @@ package instance
 
 import (
 	"fmt"
+
 	"github.com/mitchellh/goamz/ec2"
 	"github.com/mitchellh/multistep"
 	awscommon "github.com/mitchellh/packer/builder/amazon/common"
@@ -24,6 +25,11 @@ func (s *StepRegisterAMI) Run(state multistep.StateBag) multistep.StepAction {
 		VirtType:      config.AMIVirtType,
 	}
 
+	// Set SriovNetSupport to "simple". See http://goo.gl/icuXh5
+	if config.AMIEnhancedNetworking {
+		registerOpts.SriovNetSupport = "simple"
+	}
+
 	registerResp, err := ec2conn.RegisterImage(registerOpts)
 	if err != nil {
 		state.Put("error", fmt.Errorf("Error registering AMI: %s", err))