CAPA: Add hidden flags --aws-prefix-list-id and --aws-transit-gateway-id for private clusters

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project's packages adheres to [Semantic Versioning](http://semver.org/s
 
 ## [Unreleased]
 
+### Added
+
+- CAPA: Add hidden flags `--aws-prefix-list-id` and `--aws-transit-gateway-id` for private clusters
+
 ### Changed
 
 - CAPA: Renamed hidden parameter `--role` to `--aws-cluster-role-identity-name` and adapted manifest output to the new name `awsClusterRoleIdentityName` (see [cluster-aws](https://github.com/giantswarm/cluster-aws/pull/192) change)

cmd/template/cluster/flag.go

@@ -36,6 +36,8 @@ const (
 	flagAWSDNSMode                 = "dns-mode"
 	flagAWSVPCMode                 = "vpc-mode"
 	flagAWSTopologyMode            = "topology-mode"
+	flagAWSPrefixListID            = "aws-prefix-list-id"
+	flagAWSTransitGatewayID        = "aws-transit-gateway-id"
 
 	flagAWSMachinePoolMinSize          = "machine-pool-min-size"
 	flagAWSMachinePoolMaxSize          = "machine-pool-max-size"
@@ -157,6 +159,8 @@ func (f *flag) Init(cmd *cobra.Command) {
 	cmd.Flags().StringVar(&f.AWS.VPCMode, flagAWSVPCMode, "", "VPC mode of the network (public,private)")
 	cmd.Flags().StringVar(&f.AWS.DNSMode, flagAWSDNSMode, "", "DNS  mode of the network (public,private)")
 	cmd.Flags().StringVar(&f.AWS.TopologyMode, flagAWSTopologyMode, "", "Topology mode of the network (UserManaged,GiantSwarmManaged,None)")
+	cmd.Flags().StringVar(&f.AWS.PrefixListID, flagAWSPrefixListID, "", "Prefix list ID to manage. Workload cluster will be able to reach the destinations in the prefix list via the transit gateway. If not specified, it will be looked up by name/namespace of the management cluster (ends with `-tgw-prefixlist`). Only applies to proxy-private clusters.")
+	cmd.Flags().StringVar(&f.AWS.TransitGatewayID, flagAWSTransitGatewayID, "", "ID of the transit gateway to attach the cluster VPC to. If not specified for workload clusters, the management cluster's transit gateway will be used. Only applies to proxy-private clusters.")
 	// aws control plane
 	cmd.Flags().StringVar(&f.AWS.ControlPlaneSubnet, flagAWSControlPlaneSubnet, "", "Subnet used for the Control Plane.")
 	// aws machine pool
@@ -257,6 +261,8 @@ func (f *flag) Init(cmd *cobra.Command) {
 	_ = cmd.Flags().MarkHidden(flagAWSVPCMode)
 	_ = cmd.Flags().MarkHidden(flagAWSDNSMode)
 	_ = cmd.Flags().MarkHidden(flagAWSTopologyMode)
+	_ = cmd.Flags().MarkHidden(flagAWSPrefixListID)
+	_ = cmd.Flags().MarkHidden(flagAWSTransitGatewayID)
 
 	_ = cmd.Flags().MarkHidden(flagGCPProject)
 	_ = cmd.Flags().MarkHidden(flagGCPFailureDomains)

cmd/template/cluster/provider/capa.go

@@ -11,6 +11,7 @@ import (
 	"github.com/giantswarm/microerror"
 	"sigs.k8s.io/yaml"
 
+	gsannotation "github.com/giantswarm/k8smetadata/pkg/annotation"
 	k8smetadata "github.com/giantswarm/k8smetadata/pkg/label"
 
 	"github.com/giantswarm/kubectl-gs/v2/cmd/template/cluster/provider/templates/aws"
@@ -20,10 +21,9 @@ import (
 )
 
 const (
-	DefaultAppsRepoName  = "default-apps-aws"
-	ClusterAWSRepoName   = "cluster-aws"
-	ModePrivate          = "private"
-	TopoloyModeGSManaged = "GiantSwarmManaged"
+	DefaultAppsRepoName = "default-apps-aws"
+	ClusterAWSRepoName  = "cluster-aws"
+	ModePrivate         = "private"
 )
 
 func WriteCAPATemplate(ctx context.Context, client k8sclient.Interface, output io.Writer, config ClusterConfig) error {
@@ -134,7 +134,9 @@ func templateClusterAWS(ctx context.Context, k8sClient k8sclient.Interface, outp
 			flagValues.Network.APIMode = defaultTo(config.AWS.APIMode, ModePrivate)
 			flagValues.Network.VPCMode = defaultTo(config.AWS.VPCMode, ModePrivate)
 			flagValues.Network.DNSMode = defaultTo(config.AWS.DNSMode, ModePrivate)
-			flagValues.Network.TopologyMode = defaultTo(config.AWS.TopologyMode, TopoloyModeGSManaged)
+			flagValues.Network.TopologyMode = defaultTo(config.AWS.TopologyMode, gsannotation.NetworkTopologyModeGiantSwarmManaged)
+			flagValues.Network.PrefixListID = config.AWS.PrefixListID
+			flagValues.Network.TransitGatewayID = config.AWS.TransitGatewayID
 		}
 
 		configData, err := capa.GenerateClusterValues(flagValues)

cmd/template/cluster/provider/common.go

@@ -45,6 +45,8 @@ type AWSConfig struct {
 	VPCMode                    string
 	DNSMode                    string
 	TopologyMode               string
+	PrefixListID               string
+	TransitGatewayID           string
 }
 
 type AWSMachinePoolConfig struct {

cmd/template/cluster/provider/templates/capa/functions.go

@@ -1,11 +1,25 @@
 package capa
 
 import (
+	"fmt"
+	"strings"
+
+	gsannotation "github.com/giantswarm/k8smetadata/pkg/annotation"
 	"github.com/giantswarm/microerror"
 	"sigs.k8s.io/yaml"
 )
 
 func GenerateClusterValues(flagInputs ClusterConfig) (string, error) {
+	if flagInputs.Network.TopologyMode != "" && flagInputs.Network.TopologyMode != gsannotation.NetworkTopologyModeGiantSwarmManaged && flagInputs.Network.TopologyMode != gsannotation.NetworkTopologyModeUserManaged && flagInputs.Network.TopologyMode != gsannotation.NetworkTopologyModeNone {
+		return "", fmt.Errorf("invalid topology mode value %q", flagInputs.Network.TopologyMode)
+	}
+	if flagInputs.Network.PrefixListID != "" && !strings.HasPrefix(flagInputs.Network.PrefixListID, "pl-") {
+		return "", fmt.Errorf("invalid AWS prefix list ID %q", flagInputs.Network.PrefixListID)
+	}
+	if flagInputs.Network.TransitGatewayID != "" && !strings.HasPrefix(flagInputs.Network.TransitGatewayID, "tgw-") {
+		return "", fmt.Errorf("invalid AWS transit gateway ID %q", flagInputs.Network.TransitGatewayID)
+	}
+
 	var flagConfigData map[string]interface{}
 
 	{

cmd/template/cluster/provider/templates/capa/types.go

@@ -27,6 +27,8 @@ type Network struct {
 	AvailabilityZoneUsageLimit int      `json:"availabilityZoneUsageLimit,omitempty"`
 	VPCCIDR                    string   `json:"vpcCIDR,omitempty"`
 	TopologyMode               string   `json:"topologyMode,omitempty"`
+	PrefixListID               string   `json:"prefixListID,omitempty"`
+	TransitGatewayID           string   `json:"transitGatewayID,omitempty"`
 	VPCMode                    string   `json:"vpcMode,omitempty"`
 	APIMode                    string   `json:"apiMode,omitempty"`
 	DNSMode                    string   `json:"dnsMode,omitempty"`

cmd/template/cluster/runner_test.go

@@ -169,6 +169,8 @@ func Test_run(t *testing.T) {
 					NetworkVPCCIDR:             "10.123.0.0/16",
 					APIMode:                    "public",
 					TopologyMode:               "UserManaged",
+					PrefixListID:               "pl-123456789abc",
+					TransitGatewayID:           "tgw-987987987987def",
 					HttpsProxy:                 "https://internal-a1c90e5331e124481a14fb7ad80ae8eb-1778512673.eu-west-2.elb.amazonaws.com:4000",
 					HttpProxy:                  "http://internal-a1c90e5331e124481a14fb7ad80ae8eb-1778512673.eu-west-2.elb.amazonaws.com:4000",
 					NoProxy:                    "test-domain.com",

cmd/template/cluster/testdata/run_template_cluster_capa_3.golden

@@ -25,6 +25,7 @@ data:
     network:
       apiMode: public
       dnsMode: private
+      prefixListID: pl-123456789abc
       subnets:
       - cidrBlocks:
         - availabilityZone: a
@@ -33,6 +34,7 @@ data:
           cidr: 10.123.64.0/18
         isPublic: false
       topologyMode: UserManaged
+      transitGatewayID: tgw-987987987987def
       vpcCIDR: 10.123.0.0/16
       vpcMode: private
     organization: test