Add custom ha proxy config to CAPD API

Author: alexander-demicev

test/infrastructure/docker/api/v1alpha3/conversion.go

@@ -45,6 +45,10 @@ func (src *DockerCluster) ConvertTo(dstRaw conversion.Hub) error {
 		dst.Spec.LoadBalancer.ImageTag = restored.Spec.LoadBalancer.ImageTag
 	}
 
+	if restored.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef != nil {
+		dst.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef = restored.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef
+	}
+
 	return nil
 }
 

test/infrastructure/docker/api/v1alpha4/conversion.go

@@ -27,13 +27,35 @@ import (
 func (src *DockerCluster) ConvertTo(dstRaw conversion.Hub) error {
 	dst := dstRaw.(*infrav1.DockerCluster)
 
-	return Convert_v1alpha4_DockerCluster_To_v1beta1_DockerCluster(src, dst, nil)
+	if err := Convert_v1alpha4_DockerCluster_To_v1beta1_DockerCluster(src, dst, nil); err != nil {
+		return err
+	}
+
+	// Manually restore data.
+	restored := &infrav1.DockerCluster{}
+	if ok, err := utilconversion.UnmarshalData(src, restored); err != nil || !ok {
+		return err
+	}
+
+	if restored.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef != nil {
+		dst.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef = restored.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef
+	}
+
+	return nil
 }
 
 func (dst *DockerCluster) ConvertFrom(srcRaw conversion.Hub) error {
 	src := srcRaw.(*infrav1.DockerCluster)
 
-	return Convert_v1beta1_DockerCluster_To_v1alpha4_DockerCluster(src, dst, nil)
+	if err := Convert_v1beta1_DockerCluster_To_v1alpha4_DockerCluster(src, dst, nil); err != nil {
+		return err
+	}
+
+	if err := utilconversion.MarshalData(src, dst); err != nil {
+		return err
+	}
+
+	return nil
 }
 
 func (src *DockerClusterList) ConvertTo(dstRaw conversion.Hub) error {
@@ -63,6 +85,10 @@ func (src *DockerClusterTemplate) ConvertTo(dstRaw conversion.Hub) error {
 
 	dst.Spec.Template.ObjectMeta = restored.Spec.Template.ObjectMeta
 
+	if restored.Spec.Template.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef != nil {
+		dst.Spec.Template.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef = restored.Spec.Template.Spec.LoadBalancer.CustomHAProxyConfigTemplateRef
+	}
+
 	return nil
 }
 
@@ -171,3 +197,7 @@ func Convert_v1beta1_DockerMachineTemplateResource_To_v1alpha4_DockerMachineTemp
 	// NOTE: custom conversion func is required because spec.template.metadata has been added in v1beta1.
 	return autoConvert_v1beta1_DockerMachineTemplateResource_To_v1alpha4_DockerMachineTemplateResource(in, out, s)
 }
+
+func Convert_v1beta1_DockerLoadBalancer_To_v1alpha4_DockerLoadBalancer(in *infrav1.DockerLoadBalancer, out *DockerLoadBalancer, s apiconversion.Scope) error {
+	return autoConvert_v1beta1_DockerLoadBalancer_To_v1alpha4_DockerLoadBalancer(in, out, s)
+}

test/infrastructure/docker/api/v1alpha4/zz_generated.conversion.go

@@ -17,6 +17,7 @@ limitations under the License.
 package v1beta1
 
 import (
+	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
@@ -53,6 +54,17 @@ type DockerClusterSpec struct {
 type DockerLoadBalancer struct {
 	// ImageMeta allows customizing the image used for the cluster load balancer.
 	ImageMeta `json:",inline"`
+
+	// UnsafeHAProxyConfigTemplateRef allows you to replace the HAProxy config file.
+	// This field is a reference to a config map that contains the configuration template. The key of the config map should be equal to 'value'.
+	// The content of the config map will be processed and will replace the default HAProxy config file. Please use it with caution, as there are
+	// no checks to ensure the validity of the configuration. This template will support the following variables that will be passed by the controller:
+	// $IPv6 (bool) indicates if the cluster is IPv6, $FrontendControlPlanePort (string) indicates the frontend control plane port,
+	// $BackendControlPlanePort (string) indicates the backend control plane port, $BackendServers (map[string]string) indicates the backend server
+	// where the key is the server name and the value is the address. This map is dynamic and is updated every time a new control plane
+	// node is added or removed. The template will also support the JoinHostPort function to join the host and port of the backend server.
+	// +optional
+	CustomHAProxyConfigTemplateRef *corev1.LocalObjectReference `json:"unsafeHAProxyConfigTemplateRef,omitempty"`
 }
 
 // ImageMeta allows customizing the image used for components that are not