ClusterClass: Introduce NamingStrategy and allow generating names usi…

…ng go templates

api/v1alpha4/conversion.go

@@ -122,13 +122,15 @@ func (src *ClusterClass) ConvertTo(dstRaw conversion.Hub) error {
 	dst.Spec.Patches = restored.Spec.Patches
 	dst.Spec.Variables = restored.Spec.Variables
 	dst.Spec.ControlPlane.MachineHealthCheck = restored.Spec.ControlPlane.MachineHealthCheck
+	dst.Spec.ControlPlane.NamingStrategy = restored.Spec.ControlPlane.NamingStrategy
 	dst.Spec.ControlPlane.NodeDrainTimeout = restored.Spec.ControlPlane.NodeDrainTimeout
 	dst.Spec.ControlPlane.NodeVolumeDetachTimeout = restored.Spec.ControlPlane.NodeVolumeDetachTimeout
 	dst.Spec.ControlPlane.NodeDeletionTimeout = restored.Spec.ControlPlane.NodeDeletionTimeout
 
 	for i := range restored.Spec.Workers.MachineDeployments {
 		dst.Spec.Workers.MachineDeployments[i].MachineHealthCheck = restored.Spec.Workers.MachineDeployments[i].MachineHealthCheck
 		dst.Spec.Workers.MachineDeployments[i].FailureDomain = restored.Spec.Workers.MachineDeployments[i].FailureDomain
+		dst.Spec.Workers.MachineDeployments[i].NamingStrategy = restored.Spec.Workers.MachineDeployments[i].NamingStrategy
 		dst.Spec.Workers.MachineDeployments[i].NodeDrainTimeout = restored.Spec.Workers.MachineDeployments[i].NodeDrainTimeout
 		dst.Spec.Workers.MachineDeployments[i].NodeVolumeDetachTimeout = restored.Spec.Workers.MachineDeployments[i].NodeVolumeDetachTimeout
 		dst.Spec.Workers.MachineDeployments[i].NodeDeletionTimeout = restored.Spec.Workers.MachineDeployments[i].NodeDeletionTimeout

api/v1beta1/clusterclass_types.go

@@ -106,6 +106,10 @@ type ControlPlaneClass struct {
 	// +optional
 	MachineHealthCheck *MachineHealthCheckClass `json:"machineHealthCheck,omitempty"`
 
+	// NamingStrategy allows changing the naming pattern used when creating the control plane provider object.
+	// +optional
+	NamingStrategy *ControlPlaneClassNamingStrategy `json:"namingStrategy,omitempty"`
+
 	// NodeDrainTimeout is the total amount of time that the controller will spend on draining a node.
 	// The default value is 0, meaning that the node can be drained without any time limitations.
 	// NOTE: NodeDrainTimeout is different from `kubectl drain --timeout`
@@ -127,6 +131,19 @@ type ControlPlaneClass struct {
 	NodeDeletionTimeout *metav1.Duration `json:"nodeDeletionTimeout,omitempty"`
 }
 
+// ControlPlaneClassNamingStrategy defines the naming strategy for control plane objects.
+type ControlPlaneClassNamingStrategy struct {
+	// Template defines the template to use for generating the name of the ControlPlane object.
+	// If not defined, it will fallback to `{{ .cluster.name }}-{{ .random }}`.
+	// If the templated string exceeds 63 characters, it will be trimmed to 58 characters and will
+	// get concatenated with a random suffix of length 5.
+	// The templating mechanism provides the following arguments:
+	// * `.cluster.name`: The name of the cluster object.
+	// * `.random`: A random alphanumeric string, without vowels, of length 5.
+	// +optional
+	Template *string `json:"template,omitempty"`
+}
+
 // WorkersClass is a collection of deployment classes.
 type WorkersClass struct {
 	// MachineDeployments is a list of machine deployment classes that can be used to create
@@ -157,6 +174,10 @@ type MachineDeploymentClass struct {
 	// +optional
 	FailureDomain *string `json:"failureDomain,omitempty"`
 
+	// NamingStrategy allows changing the naming pattern used when creating the MachineDeployment.
+	// +optional
+	NamingStrategy *MachineDeploymentClassNamingStrategy `json:"namingStrategy,omitempty"`
+
 	// NodeDrainTimeout is the total amount of time that the controller will spend on draining a node.
 	// The default value is 0, meaning that the node can be drained without any time limitations.
 	// NOTE: NodeDrainTimeout is different from `kubectl drain --timeout`
@@ -207,6 +228,20 @@ type MachineDeploymentClassTemplate struct {
 	Infrastructure LocalObjectTemplate `json:"infrastructure"`
 }
 
+// MachineDeploymentClassNamingStrategy defines the naming strategy for machine deployment objects.
+type MachineDeploymentClassNamingStrategy struct {
+	// Template defines the template to use for generating the name of the MachineDeployment object.
+	// If not defined, it will fallback to `{{ .cluster.name }}-{{ .machineDeployment.topologyName }}-{{ .random }}`.
+	// If the templated string exceeds 63 characters, it will be trimmed to 58 characters and will
+	// get concatenated with a random suffix of length 5.
+	// The templating mechanism provides the following arguments:
+	// * `.cluster.name`: The name of the cluster object.
+	// * `.random`: A random alphanumeric string, without vowels, of length 5.
+	// * `.machineDeployment.topologyName`: The name of the MachineDeployment topology (Cluster.spec.topology.workers.machineDeployments[].name).
+	// +optional
+	Template *string `json:"template,omitempty"`
+}
+
 // MachineHealthCheckClass defines a MachineHealthCheck for a group of Machines.
 type MachineHealthCheckClass struct {
 	// UnhealthyConditions contains a list of the conditions that determine