Support BYO dual-stack Network

This commit adds support to specify more than one
existent subnet on the `OpenStackCluster`. The existent
`OpenStackClusterSpec.Subnet` is deprecated in favor
of `OpenStackClusterSpec.Subnets`.

Author: MaysaMacedo

api/v1alpha5/zz_generated.conversion.go

@@ -48,8 +48,13 @@ type OpenStackClusterSpec struct {
 	Network NetworkFilter `json:"network,omitempty"`
 
 	// If NodeCIDR cannot be set this can be used to detect an existing subnet.
+	//
+	// Deprecated: Use subnets instead. subnet will be silently ignored if subnets is set.
 	Subnet SubnetFilter `json:"subnet,omitempty"`
 
+	// If NodeCIDR cannot be set this can be used to detect existing IPv4 and/or IPv6 subnets.
+	Subnets []SubnetFilter `json:"subnets,omitempty"`
+
 	// NetworkMTU sets the maximum transmission unit (MTU) value to address fragmentation for the private network ID.
 	// This value will be used only if the Cluster actuator creates the network.
 	// If leaved empty, the network will have the default MTU defined in Openstack network service.

api/v1alpha6/zz_generated.conversion.go

@@ -5371,8 +5371,9 @@ spec:
                     type: string
                 type: object
               subnet:
-                description: If NodeCIDR cannot be set this can be used to detect
-                  an existing subnet.
+                description: "If NodeCIDR cannot be set this can be used to detect
+                  an existing subnet. \n Deprecated: Use subnets instead. subnet will
+                  be silently ignored if subnets is set."
                 properties:
                   cidr:
                     type: string
@@ -5401,6 +5402,39 @@ spec:
                   tagsAny:
                     type: string
                 type: object
+              subnets:
+                description: If NodeCIDR cannot be set this can be used to detect
+                  existing IPv4 and/or IPv6 subnets.
+                items:
+                  properties:
+                    cidr:
+                      type: string
+                    description:
+                      type: string
+                    gateway_ip:
+                      type: string
+                    id:
+                      type: string
+                    ipVersion:
+                      type: integer
+                    ipv6AddressMode:
+                      type: string
+                    ipv6RaMode:
+                      type: string
+                    name:
+                      type: string
+                    notTags:
+                      type: string
+                    notTagsAny:
+                      type: string
+                    projectId:
+                      type: string
+                    tags:
+                      type: string
+                    tagsAny:
+                      type: string
+                  type: object
+                type: array
               tags:
                 description: Tags for all resources in cluster
                 items:

api/v1alpha7/openstackcluster_types.go

@@ -2924,8 +2924,9 @@ spec:
                             type: string
                         type: object
                       subnet:
-                        description: If NodeCIDR cannot be set this can be used to
-                          detect an existing subnet.
+                        description: "If NodeCIDR cannot be set this can be used to
+                          detect an existing subnet. \n Deprecated: Use subnets instead.
+                          subnet will be silently ignored if subnets is set."
                         properties:
                           cidr:
                             type: string
@@ -2954,6 +2955,39 @@ spec:
                           tagsAny:
                             type: string
                         type: object
+                      subnets:
+                        description: If NodeCIDR cannot be set this can be used to
+                          detect existing IPv4 and/or IPv6 subnets.
+                        items:
+                          properties:
+                            cidr:
+                              type: string
+                            description:
+                              type: string
+                            gateway_ip:
+                              type: string
+                            id:
+                              type: string
+                            ipVersion:
+                              type: integer
+                            ipv6AddressMode:
+                              type: string
+                            ipv6RaMode:
+                              type: string
+                            name:
+                              type: string
+                            notTags:
+                              type: string
+                            notTagsAny:
+                              type: string
+                            projectId:
+                              type: string
+                            tags:
+                              type: string
+                            tagsAny:
+                              type: string
+                          type: object
+                        type: array
                       tags:
                         description: Tags for all resources in cluster
                         items:

api/v1alpha7/zz_generated.deepcopy.go

@@ -461,26 +461,26 @@ func reconcileNetworkComponents(scope scope.Scope, cluster *clusterv1.Cluster, o
 		openStackCluster.Status.Network.Name = networkList[0].Name
 		openStackCluster.Status.Network.Tags = networkList[0].Tags
 
-		subnet, err := networkingService.GetNetworkSubnetByFilter(openStackCluster.Status.Network.ID, &openStackCluster.Spec.Subnet)
-		if err != nil {
-			err = fmt.Errorf("failed to find subnet: %w", err)
+		var filteredSubnets []infrav1.Subnet
+		for _, subnet := range openStackCluster.Spec.Subnets {
+			filteredSubnet, err := networkingService.GetNetworkSubnetByFilter(openStackCluster.Status.Network.ID, &subnet)
+			if err != nil {
+				err = fmt.Errorf("failed to find subnet: %w", err)
+				// Set the cluster to failed if subnet filter is invalid
+				if errors.Is(err, networking.ErrFilterMatch) {
+					handleUpdateOSCError(openStackCluster, err)
+				}
 
-			// Set the cluster to failed if subnet filter is invalid
-			if errors.Is(err, networking.ErrFilterMatch) {
-				handleUpdateOSCError(openStackCluster, err)
+				return err
 			}
-
-			return err
-		}
-
-		openStackCluster.Status.Network.Subnets = []infrav1.Subnet{
-			{
-				ID:   subnet.ID,
-				Name: subnet.Name,
-				CIDR: subnet.CIDR,
-				Tags: subnet.Tags,
-			},
+			filteredSubnets = append(filteredSubnets, infrav1.Subnet{
+				ID:   filteredSubnet.ID,
+				Name: filteredSubnet.Name,
+				CIDR: filteredSubnet.CIDR,
+				Tags: filteredSubnet.Tags,
+			})
 		}
+		openStackCluster.Status.Network.Subnets = filteredSubnets
 	} else {
 		err := networkingService.ReconcileNetwork(openStackCluster, clusterName)
 		if err != nil {