Add computeNodes

Signed-off-by: melserngawy <[email protected]>

Author: serngawy

config/crd/bases/controlplane.cluster.x-k8s.io_rosacontrolplanes.yaml

@@ -116,7 +116,8 @@ spec:
                 properties:
                   autoscaling:
                     description: Autoscaling specifies auto scaling behaviour for
-                      this MachinePool.
+                      the default MachinePool. Autoscaling min/max value must be equal
+                      or multiple of the availability zones count.
                     properties:
                       maxReplicas:
                         minimum: 1

controlplane/rosa/api/v1beta2/rosacontrolplane_types.go

@@ -198,7 +198,8 @@ type DefaultMachinePoolSpec struct {
 	// +optional
 	InstanceType string `json:"instanceType,omitempty"`
 
-	// Autoscaling specifies auto scaling behaviour for this MachinePool.
+	// Autoscaling specifies auto scaling behaviour for the default MachinePool. Autoscaling min/max value
+	// must be equal or multiple of the availability zones count.
 	// +optional
 	Autoscaling *expinfrav1.RosaMachinePoolAutoScaling `json:"autoscaling,omitempty"`
 }

controlplane/rosa/controllers/rosacontrolplane_controller.go

@@ -611,9 +611,13 @@ func buildOCMClusterSpec(controPlaneSpec rosacontrolplanev1.RosaControlPlaneSpec
 	}
 
 	// Set cluster compute autoscaling replicas
+	// In case autoscaling is not defined and multiple zones defined, set the compute nodes equal to the zones count.
 	if computeAutoscaling := controPlaneSpec.DefaultMachinePoolSpec.Autoscaling; computeAutoscaling != nil {
+		ocmClusterSpec.Autoscaling = true
 		ocmClusterSpec.MaxReplicas = computeAutoscaling.MaxReplicas
 		ocmClusterSpec.MinReplicas = computeAutoscaling.MinReplicas
+	} else if computeAutoscaling == nil && len(controPlaneSpec.AvailabilityZones) > 1 {
+		ocmClusterSpec.ComputeNodes = len(controPlaneSpec.AvailabilityZones)
 	}
 
 	if controPlaneSpec.ProvisionShardID != "" {