Enable configurable API Server Load Balancer

validation tests

fix build

tests

Update cluster.go

dns name

wip

Update azurecluster_conversion.go

remove internal role

Update cluster.go

Add NodeOutboundLBName

generate

fix apiserver dns

Update kubectl-capz-ssh

Update loadbalancers.go

fixes

internal lb private IP webhook default

Update publicips.go

improve webhook validation

Update cluster.go

fix deep copy

api/v1alpha2/azurecluster_conversion.go

@@ -161,11 +161,6 @@ func Convert_v1alpha3_AzureClusterStatus_To_v1alpha2_AzureClusterStatus(in *infr
 	return nil
 }
 
-// Convert_v1alpha2_Network_To_v1alpha3_Network.
-func Convert_v1alpha2_Network_To_v1alpha3_Network(in *Network, out *infrav1alpha3.Network, s apiconversion.Scope) error { //nolint
-	return autoConvert_v1alpha2_Network_To_v1alpha3_Network(in, out, s)
-}
-
 // Convert_v1alpha2_NetworkSpec_To_v1alpha3_NetworkSpec.
 func Convert_v1alpha2_NetworkSpec_To_v1alpha3_NetworkSpec(in *NetworkSpec, out *infrav1alpha3.NetworkSpec, s apiconversion.Scope) error { //nolint
 	if err := Convert_v1alpha2_VnetSpec_To_v1alpha3_VnetSpec(&in.Vnet, &out.Vnet, s); err != nil {

api/v1alpha3/azurecluster_default.go

@@ -27,6 +27,8 @@ const (
 	DefaultControlPlaneSubnetCIDR = "10.0.0.0/16"
 	// DefaultNodeSubnetCIDR is the default Node Subnet CIDR
 	DefaultNodeSubnetCIDR = "10.1.0.0/16"
+	// DefaultInternalLBIPAddress is the default internal load balancer ip address
+	DefaultInternalLBIPAddress = "10.0.0.100"
 )
 
 const (
@@ -36,16 +38,19 @@ const (
 	DefaultControlPlaneSubnetIPv6CIDR = "2001:1234:5678:9abc::/64"
 	// DefaultNodeSubnetIPv6CIDR is the default Node Subnet CIDR
 	DefaultNodeSubnetIPv6CIDR = "2001:1234:5678:9abd::/64"
+	// DefaultInternalLBIPv6Address is the default internal load balancer ip address
+	DefaultInternalLBIPv6Address = "2001:1234:5678:9abc::100"
 )
 
 func (c *AzureCluster) setDefaults() {
+	c.setResourceGroupDefault()
 	c.setNetworkSpecDefaults()
 }
 
 func (c *AzureCluster) setNetworkSpecDefaults() {
-	c.setResourceGroupDefault()
 	c.setVnetDefaults()
 	c.setSubnetDefaults()
+	c.setAPIServerLBDefaults()
 }
 
 func (c *AzureCluster) setResourceGroupDefault() {
@@ -103,6 +108,50 @@ func (c *AzureCluster) setSubnetDefaults() {
 	}
 }
 
+func (c *AzureCluster) setAPIServerLBDefaults() {
+	lb := &c.Spec.NetworkSpec.APIServerLB
+	if lb.Type == "" {
+		lb.Type = Public
+	}
+	if lb.SKU == "" {
+		lb.SKU = SKUStandard
+	}
+
+	if lb.Type == Public {
+		if lb.Name == "" {
+			lb.Name = generatePublicLBName(c.ObjectMeta.Name)
+		}
+		if len(lb.FrontendIPs) == 0 {
+			lb.FrontendIPs = []FrontendIP{
+				{
+					Name: generateFrontendIPConfigName(lb.Name),
+					PublicIP: &PublicIPSpec{
+						Name: generatePublicIPName(c.ObjectMeta.Name),
+					},
+				},
+			}
+		}
+
+	} else if lb.Type == Internal {
+		if lb.Name == "" {
+			lb.Name = generateInternalLBName(c.ObjectMeta.Name)
+		}
+		if len(lb.FrontendIPs) == 0 {
+			// for back compat, set the private IP to the subnet InternalLBIPAddress value.
+			privateIP := c.Spec.NetworkSpec.GetControlPlaneSubnet().InternalLBIPAddress
+			if privateIP == "" {
+				privateIP = DefaultInternalLBIPAddress
+			}
+			lb.FrontendIPs = []FrontendIP{
+				{
+					Name:             generateFrontendIPConfigName(lb.Name),
+					PrivateIPAddress: privateIP,
+				},
+			}
+		}
+	}
+}
+
 // generateVnetName generates a virtual network name, based on the cluster name.
 func generateVnetName(clusterName string) string {
 	return fmt.Sprintf("%s-%s", clusterName, "vnet")
@@ -132,3 +181,23 @@ func generateNodeSecurityGroupName(clusterName string) string {
 func generateNodeRouteTableName(clusterName string) string {
 	return fmt.Sprintf("%s-%s", clusterName, "node-routetable")
 }
+
+// generateInternalLBName generates a internal load balancer name, based on the cluster name.
+func generateInternalLBName(clusterName string) string {
+	return fmt.Sprintf("%s-%s", clusterName, "internal-lb")
+}
+
+// generatePublicLBName generates a public load balancer name, based on the cluster name.
+func generatePublicLBName(clusterName string) string {
+	return fmt.Sprintf("%s-%s", clusterName, "public-lb")
+}
+
+// generatePublicIPName generates a public IP name, based on the cluster name and a hash.
+func generatePublicIPName(clusterName string) string {
+	return fmt.Sprintf("pip-%s-apiserver", clusterName)
+}
+
+// generateFrontendIPConfigName generates a load balancer frontend IP config name.
+func generateFrontendIPConfigName(lbName string) string {
+	return fmt.Sprintf("%s-%s", lbName, "frontEnd")
+}