add option to configure network adapter multiqueue support

builder/proxmox/config.go

@@ -68,6 +68,7 @@ type Config struct {
 
 type nicConfig struct {
 	Model        string `mapstructure:"model"`
+	PacketQueues int    `mapstructure:"packet_queues"`
 	MACAddress   string `mapstructure:"mac_address"`
 	Bridge       string `mapstructure:"bridge"`
 	VLANTag      string `mapstructure:"vlan_tag"`
@@ -233,6 +234,9 @@ func (c *Config) Prepare(raws ...interface{}) ([]string, error) {
 		if c.NICs[idx].Bridge == "" {
 			errs = packer.MultiErrorAppend(errs, errors.New(fmt.Sprintf("network_adapters[%d].bridge must be specified", idx)))
 		}
+		if c.NICs[idx].Model != "virtio" && c.NICs[idx].PacketQueues > 0 {
+			errs = packer.MultiErrorAppend(errs, errors.New(fmt.Sprintf("network_adapters[%d].packet_queues can only be set for 'virtio' driver", idx)))
+		}
 	}
 	for idx := range c.Disks {
 		if c.Disks[idx].StoragePool == "" {

builder/proxmox/config.hcl2spec.go

@@ -248,6 +248,7 @@ func (*FlatdiskConfig) HCL2Spec() map[string]hcldec.Spec {
 // Where the contents of a field with a `mapstructure:,squash` tag are bubbled up.
 type FlatnicConfig struct {
 	Model        *string `mapstructure:"model" cty:"model" hcl:"model"`
+	PacketQueues *int    `mapstructure:"packet_queues" cty:"packet_queues" hcl:"packet_queues"`
 	MACAddress   *string `mapstructure:"mac_address" cty:"mac_address" hcl:"mac_address"`
 	Bridge       *string `mapstructure:"bridge" cty:"bridge" hcl:"bridge"`
 	VLANTag      *string `mapstructure:"vlan_tag" cty:"vlan_tag" hcl:"vlan_tag"`
@@ -267,6 +268,7 @@ func (*nicConfig) FlatMapstructure() interface{ HCL2Spec() map[string]hcldec.Spe
 func (*FlatnicConfig) HCL2Spec() map[string]hcldec.Spec {
 	s := map[string]hcldec.Spec{
 		"model":         &hcldec.AttrSpec{Name: "model", Type: cty.String, Required: false},
+		"packet_queues": &hcldec.AttrSpec{Name: "packet_queues", Type: cty.Number, Required: false},
 		"mac_address":   &hcldec.AttrSpec{Name: "mac_address", Type: cty.String, Required: false},
 		"bridge":        &hcldec.AttrSpec{Name: "bridge", Type: cty.String, Required: false},
 		"vlan_tag":      &hcldec.AttrSpec{Name: "vlan_tag", Type: cty.String, Required: false},

builder/proxmox/config_test.go

@@ -8,6 +8,17 @@ import (
 	"github.com/hashicorp/packer/template"
 )
 
+func mandatoryConfig(t *testing.T) map[string]interface{} {
+	return map[string]interface{}{
+		"proxmox_url":  "https://my-proxmox.my-domain:8006/api2/json",
+		"username":     "apiuser@pve",
+		"password":     "supersecret",
+		"iso_file":     "local:iso/Fedora-Server-dvd-x86_64-29-1.2.iso",
+		"node":         "my-proxmox",
+		"ssh_username": "root",
+	}
+}
+
 func TestRequiredParameters(t *testing.T) {
 	var c Config
 	_, err := c.Prepare(make(map[string]interface{}))
@@ -166,3 +177,48 @@ func TestAgentSetToFalse(t *testing.T) {
 		t.Errorf("Expected Agent to be false, got %t", b.config.Agent)
 	}
 }
+
+func TestNetworkAdapterPacketQueueSupport(t *testing.T) {
+	drivertests := []struct {
+		expectedToFail bool
+		model          string
+	}{
+		{expectedToFail: false, model: "virtio"},
+		{expectedToFail: true, model: "e1000"},
+		{expectedToFail: true, model: "e1000-82540em"},
+		{expectedToFail: true, model: "e1000-82544gc"},
+		{expectedToFail: true, model: "e1000-82545em"},
+		{expectedToFail: true, model: "i82551"},
+		{expectedToFail: true, model: "i82557b"},
+		{expectedToFail: true, model: "i82559er"},
+		{expectedToFail: true, model: "ne2k_isa"},
+		{expectedToFail: true, model: "ne2k_pci"},
+		{expectedToFail: true, model: "pcnet"},
+		{expectedToFail: true, model: "rtl8139"},
+		{expectedToFail: true, model: "vmxnet3"},
+	}
+
+	for _, tt := range drivertests {
+		device := make(map[string]interface{})
+		device["bridge"] = "vmbr0"
+		device["model"] = tt.model
+		device["packet_queues"] = 2
+
+		devices := make([]map[string]interface{}, 0)
+		devices = append(devices, device)
+
+		cfg := mandatoryConfig(t)
+		cfg["network_adapters"] = devices
+
+		var c Config
+		_, err := c.Prepare(cfg)
+
+		if tt.expectedToFail == true && err == nil {
+			t.Error("expected config preparation to fail, but no error occured")
+		}
+
+		if tt.expectedToFail == false && err != nil {
+			t.Errorf("expected config preparation to succeed, but %s", err.Error())
+		}
+	}
+}