diff --git a/builder/alicloud/ecs/builder.go b/builder/alicloud/ecs/builder.go
index 0c4cd0fe1..f3d9d73a1 100644
--- a/builder/alicloud/ecs/builder.go
+++ b/builder/alicloud/ecs/builder.go
@@ -79,7 +79,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		return nil, err
 	}
 	state := new(multistep.BasicStateBag)
-	state.Put("config", b.config)
+	state.Put("config", &b.config)
 	state.Put("client", client)
 	state.Put("hook", hook)
 	state.Put("ui", ui)
diff --git a/builder/alicloud/ecs/builder_acc_test.go b/builder/alicloud/ecs/builder_acc_test.go
index 77094f019..e6157b8c9 100644
--- a/builder/alicloud/ecs/builder_acc_test.go
+++ b/builder/alicloud/ecs/builder_acc_test.go
@@ -292,8 +292,7 @@ const testBuilderAccBasic = `
 		"type": "test",
 		"region": "cn-beijing",
 		"instance_type": "ecs.n1.tiny",
-		"source_image":"ubuntu_16_0402_64_40G_base_20170222.vhd",
-		"ssh_username": "ubuntu",
+		"source_image":"ubuntu_16_0402_64_20G_alibase_20180409.vhd",
 		"io_optimized":"true",
 		"ssh_username":"root",
 		"image_name": "packer-test_{{timestamp}}"
diff --git a/builder/alicloud/ecs/step_attach_keypair.go b/builder/alicloud/ecs/step_attach_keypair.go
index 9f5b63676..08c52d0d8 100644
--- a/builder/alicloud/ecs/step_attach_keypair.go
+++ b/builder/alicloud/ecs/step_attach_keypair.go
@@ -18,7 +18,7 @@ type stepAttachKeyPair struct {
 func (s *stepAttachKeyPair) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
 	ui := state.Get("ui").(packer.Ui)
 	client := state.Get("client").(*ecs.Client)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	instance := state.Get("instance").(*ecs.InstanceAttributesType)
 	timeoutPoint := time.Now().Add(120 * time.Second)
 	keyPairName := config.Comm.SSHKeyPairName
@@ -52,7 +52,7 @@ func (s *stepAttachKeyPair) Run(_ context.Context, state multistep.StateBag) mul
 
 func (s *stepAttachKeyPair) Cleanup(state multistep.StateBag) {
 	client := state.Get("client").(*ecs.Client)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	ui := state.Get("ui").(packer.Ui)
 	instance := state.Get("instance").(*ecs.InstanceAttributesType)
 	keyPairName := config.Comm.SSHKeyPairName
diff --git a/builder/alicloud/ecs/step_check_source_image.go b/builder/alicloud/ecs/step_check_source_image.go
index f0fbf46e2..ebd4e56cb 100644
--- a/builder/alicloud/ecs/step_check_source_image.go
+++ b/builder/alicloud/ecs/step_check_source_image.go
@@ -16,7 +16,7 @@ type stepCheckAlicloudSourceImage struct {
 
 func (s *stepCheckAlicloudSourceImage) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
 	client := state.Get("client").(*ecs.Client)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	ui := state.Get("ui").(packer.Ui)
 	args := &ecs.DescribeImagesArgs{
 		RegionId: common.Region(config.AlicloudRegion),
diff --git a/builder/alicloud/ecs/step_config_vpc.go b/builder/alicloud/ecs/step_config_vpc.go
index 8ce5663ed..c86746d1f 100644
--- a/builder/alicloud/ecs/step_config_vpc.go
+++ b/builder/alicloud/ecs/step_config_vpc.go
@@ -20,7 +20,7 @@ type stepConfigAlicloudVPC struct {
 }
 
 func (s *stepConfigAlicloudVPC) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	client := state.Get("client").(*ecs.Client)
 	ui := state.Get("ui").(packer.Ui)
 
diff --git a/builder/alicloud/ecs/step_config_vswitch.go b/builder/alicloud/ecs/step_config_vswitch.go
index 4bbb19773..4daa81a69 100644
--- a/builder/alicloud/ecs/step_config_vswitch.go
+++ b/builder/alicloud/ecs/step_config_vswitch.go
@@ -24,7 +24,7 @@ func (s *stepConfigAlicloudVSwitch) Run(_ context.Context, state multistep.State
 	client := state.Get("client").(*ecs.Client)
 	ui := state.Get("ui").(packer.Ui)
 	vpcId := state.Get("vpcid").(string)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 
 	if len(s.VSwitchId) != 0 {
 		vswitchs, _, err := client.DescribeVSwitches(&ecs.DescribeVSwitchesArgs{
diff --git a/builder/alicloud/ecs/step_create_image.go b/builder/alicloud/ecs/step_create_image.go
index ae5840c09..fedbfb272 100644
--- a/builder/alicloud/ecs/step_create_image.go
+++ b/builder/alicloud/ecs/step_create_image.go
@@ -15,7 +15,7 @@ type stepCreateAlicloudImage struct {
 }
 
 func (s *stepCreateAlicloudImage) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	client := state.Get("client").(*ecs.Client)
 	ui := state.Get("ui").(packer.Ui)
 
@@ -85,7 +85,7 @@ func (s *stepCreateAlicloudImage) Cleanup(state multistep.StateBag) {
 
 	client := state.Get("client").(*ecs.Client)
 	ui := state.Get("ui").(packer.Ui)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 
 	ui.Say("Deleting the image because of cancellation or error...")
 	if err := client.DeleteImage(common.Region(config.AlicloudRegion), s.image.ImageId); err != nil {
diff --git a/builder/alicloud/ecs/step_create_instance.go b/builder/alicloud/ecs/step_create_instance.go
index ff41a3df6..082b39188 100644
--- a/builder/alicloud/ecs/step_create_instance.go
+++ b/builder/alicloud/ecs/step_create_instance.go
@@ -28,7 +28,7 @@ type stepCreateAlicloudInstance struct {
 
 func (s *stepCreateAlicloudInstance) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
 	client := state.Get("client").(*ecs.Client)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	ui := state.Get("ui").(packer.Ui)
 	source_image := state.Get("source_image").(*ecs.ImageType)
 	network_type := state.Get("networktype").(InstanceNetWork)
diff --git a/builder/alicloud/ecs/step_delete_images_snapshots.go b/builder/alicloud/ecs/step_delete_images_snapshots.go
index 9e294c45f..6718744d9 100644
--- a/builder/alicloud/ecs/step_delete_images_snapshots.go
+++ b/builder/alicloud/ecs/step_delete_images_snapshots.go
@@ -20,7 +20,7 @@ type stepDeleteAlicloudImageSnapshots struct {
 func (s *stepDeleteAlicloudImageSnapshots) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
 	client := state.Get("client").(*ecs.Client)
 	ui := state.Get("ui").(packer.Ui)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	ui.Say("Deleting image snapshots.")
 	// Check for force delete
 	if s.AlicloudImageForceDelete {
diff --git a/builder/alicloud/ecs/step_mount_disk.go b/builder/alicloud/ecs/step_mount_disk.go
index 642605bee..40b3dc792 100644
--- a/builder/alicloud/ecs/step_mount_disk.go
+++ b/builder/alicloud/ecs/step_mount_disk.go
@@ -14,7 +14,7 @@ type stepMountAlicloudDisk struct {
 
 func (s *stepMountAlicloudDisk) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
 	client := state.Get("client").(*ecs.Client)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	ui := state.Get("ui").(packer.Ui)
 	instance := state.Get("instance").(*ecs.InstanceAttributesType)
 	alicloudDiskDevices := config.ECSImagesDiskMappings
diff --git a/builder/alicloud/ecs/step_pre_validate.go b/builder/alicloud/ecs/step_pre_validate.go
index 6bc3b1060..57c3546b6 100644
--- a/builder/alicloud/ecs/step_pre_validate.go
+++ b/builder/alicloud/ecs/step_pre_validate.go
@@ -23,7 +23,7 @@ func (s *stepPreValidate) Run(_ context.Context, state multistep.StateBag) multi
 	}
 
 	client := state.Get("client").(*ecs.Client)
-	config := state.Get("config").(Config)
+	config := state.Get("config").(*Config)
 	ui.Say("Prevalidating image name...")
 	images, _, err := client.DescribeImages(&ecs.DescribeImagesArgs{
 		ImageName: s.AlicloudDestImageName,