feat(instance): allow to create IPv6 only instances

With the routed IP, when creating a new instances with `ip=<IPv6_UUID>`
you still end up with an IPv4 attached to your instance due to the
`dynamic_ip_required` defaulting to `true`.
This change allows one to create IPv6 only instances when passing the
new option `ipv4=false` (which defaults to `true` to remain backward
compatible).

Author: ziirish

internal/namespaces/instance/v1/custom_server_create.go

@@ -28,6 +28,7 @@ type instanceCreateServerRequest struct {
 	IP                string
 	Tags              []string
 	IPv6              bool
+	IPv4              bool
 	Stopped           bool
 	SecurityGroupID   string
 	PlacementGroupID  string
@@ -100,6 +101,11 @@ func serverCreateCommand() *core.Command {
 				Name:  "ipv6",
 				Short: "Enable IPv6, to be used with routed-ip-enabled=false",
 			},
+			{
+				Name:  "ipv4",
+				Short: "Enable/disable IPv4. Usefull for routed IPs",
+				Default: core.DefaultValueSetter("true"),
+			},
 			{
 				Name:  "stopped",
 				Short: "Do not start server after its creation",
@@ -209,6 +215,7 @@ func instanceServerCreateRun(ctx context.Context, argsI interface{}) (i interfac
 		AddOrganizationID(args.OrganizationID).
 		AddProjectID(args.ProjectID).
 		AddEnableIPv6(scw.BoolPtr(args.IPv6)).
+		AddEnableIPv4(scw.BoolPtr(args.IPv4)).
 		AddTags(args.Tags).
 		AddRoutedIPEnabled(args.RoutedIPEnabled).
 		AddAdminPasswordEncryptionSSHKeyID(args.AdminPasswordEncryptionSSHKeyID).

internal/namespaces/instance/v1/custom_server_create_builder.go

@@ -35,6 +35,9 @@ type ServerBuilder struct {
 	apiInstance    *instance.API
 	apiBlock       *block.API
 
+	// IPv4 enabled
+	enableIPv4 bool
+
 	// serverType is filled with the ServerType if CommercialType is found in the API.
 	serverType *instance.ServerType
 	// serverImage is filled with the Image if one is provided
@@ -82,6 +85,17 @@ func (sb *ServerBuilder) AddEnableIPv6(enableIPv6 *bool) *ServerBuilder {
 	return sb
 }
 
+func (sb *ServerBuilder) AddEnableIPv4(enableIPv4 *bool) *ServerBuilder {
+	sb.enableIPv4 = *enableIPv4 //nolint: staticcheck
+
+	// disable dynamic IP in that case
+	if !sb.enableIPv4 {
+		sb.createReq.DynamicIPRequired = enableIPv4
+	}
+
+	return sb
+}
+
 func (sb *ServerBuilder) AddTags(tags []string) *ServerBuilder {
 	if len(tags) > 0 {
 		sb.createReq.Tags = tags
@@ -132,9 +146,16 @@ func (sb *ServerBuilder) rootVolumeIsSBS() bool {
 func (sb *ServerBuilder) defaultIPType() instance.IPType {
 	if sb.createReq.RoutedIPEnabled != nil { //nolint: staticcheck // Field is deprecated but still supported
 		if *sb.createReq.RoutedIPEnabled { //nolint: staticcheck // Field is deprecated but still supported
+			if *sb.createReq.EnableIPv6 || !sb.enableIPv4 {  //nolint: staticcheck // Field is deprecated but still supported
+				return instance.IPTypeRoutedIPv6
+			}
 			return instance.IPTypeRoutedIPv4
 		}
+		// routed_ip_enabled defaults to true, you can only have NAT IPs when specifying it to false explicitly
 		return instance.IPTypeNat
+	} else if (sb.createReq.EnableIPv6 != nil && *sb.createReq.EnableIPv6) || !sb.enableIPv4 {  //nolint: staticcheck // Field is deprecated but still supported
+		// instances now have routed_ip_enabled by default
+		return instance.IPTypeRoutedIPv6
 	}
 
 	return ""