chore: NetworkSpec: Add kubebuilder default of 1460 for MTU if not specified

Author: tasdikrahman-newrelic

api/v1beta1/types.go

@@ -144,6 +144,7 @@ type NetworkSpec struct {
 	// More info: https://pkg.go.dev/google.golang.org/api/compute/v1#Network
 	// +kubebuilder:validation:Minimum:=1300
 	// +kubebuilder:validation:Maximum:=8896
+	// +kubebuilder:default:=1460
 	// +optional
 	Mtu int64 `json:"mtu,omitempty"`
 }

cloud/scope/cluster.go

@@ -132,10 +132,16 @@ func (s *ClusterScope) NetworkName() string {
 }
 
 // NetworkMtu returns the Network MTU of 1440 which is the default, otherwise returns back what is being set.
-// https://cloud.google.com/vpc/docs/mtu
+// Mtu: Maximum Transmission Unit in bytes. The minimum value for this field is
+// 1300 and the maximum value is 8896. The suggested value is 1500, which is
+// the default MTU used on the Internet, or 8896 if you want to use Jumbo
+// frames. If unspecified, the value defaults to 1460.
+// More info
+// - https://pkg.go.dev/google.golang.org/api/compute/v1#Network
+// - https://cloud.google.com/vpc/docs/mtu
 func (s *ClusterScope) NetworkMtu() int64 {
 	if s.GCPCluster.Spec.Network.Mtu == 0 {
-		return int64(1440)
+		return int64(1460)
 	}
 	return s.GCPCluster.Spec.Network.Mtu
 }

config/crd/bases/infrastructure.cluster.x-k8s.io_gcpclusters.yaml

@@ -169,6 +169,7 @@ spec:
                     format: int32
                     type: integer
                   mtu:
+                    default: 1460
                     description: |-
                       Mtu: Maximum Transmission Unit in bytes. The minimum value for this field is
                       1300 and the maximum value is 8896. The suggested value is 1500, which is

config/crd/bases/infrastructure.cluster.x-k8s.io_gcpclustertemplates.yaml

@@ -186,6 +186,7 @@ spec:
                             format: int32
                             type: integer
                           mtu:
+                            default: 1460
                             description: |-
                               Mtu: Maximum Transmission Unit in bytes. The minimum value for this field is
                               1300 and the maximum value is 8896. The suggested value is 1500, which is

config/crd/bases/infrastructure.cluster.x-k8s.io_gcpmanagedclusters.yaml

@@ -165,6 +165,7 @@ spec:
                     format: int32
                     type: integer
                   mtu:
+                    default: 1460
                     description: |-
                       Mtu: Maximum Transmission Unit in bytes. The minimum value for this field is
                       1300 and the maximum value is 8896. The suggested value is 1500, which is