api: Add NetworkFenceClassName to NetworkFence spec

This patch adds NetworkFenceClassName to NetworkFence spec
and deprecates specifying driver, secrets and parameters
inside NetworkFence spec.

When this value is present; the driver, secrets and parameters
are read from the specified networkfence class.

Signed-off-by: Niraj Yadav <niryadav@redhat.com>

Author: black-dragon74

api/csiaddons/v1alpha1/networkfence_types.go

@@ -66,9 +66,16 @@ type SecretSpec struct {
 // NetworkFenceSpec defines the desired state of NetworkFence
 // +kubebuilder:validation:XValidation:rule="has(self.parameters) == has(oldSelf.parameters)",message="parameters are immutable"
 // +kubebuilder:validation:XValidation:rule="has(self.secret) == has(oldSelf.secret)",message="secret is immutable"
+// +kubebuilder:validation:XValidation:rule="has(self.driver) || has(self.networkFenceClassName)",message="one of driver or networkFenceClassName must be present"
 type NetworkFenceSpec struct {
-	// Driver contains  the name of CSI driver.
-	// +kubebuilder:validation:Required
+	// NetworkFenceClassName contains the name of the NetworkFenceClass
+	// +kubebuilder:validation:Optional
+	// +kubebuilder:validation:XValidation:rule="self == oldSelf",message="networkFenceClassName is immutable"
+	NetworkFenceClassName string `json:"networkFenceClassName"`
+
+	// Driver contains the name of CSI driver, required if NetworkFenceClassName is absent
+	// +kubebuilder:deprecatedversion:warning="specifying driver in networkfence is deprecated, please use networkFenceClassName instead"
+	// +kubebuilder:validation:Optional
 	// +kubebuilder:validation:XValidation:rule="self == oldSelf",message="driver is immutable"
 	Driver string `json:"driver"`
 
@@ -84,9 +91,11 @@ type NetworkFenceSpec struct {
 	Cidrs []string `json:"cidrs"`
 
 	// Secret is a kubernetes secret, which is required to perform the fence/unfence operation.
+	// +kubebuilder:deprecatedversion:warning="specifying secrets in networkfence is deprecated, please use networkFenceClassName instead"
 	Secret SecretSpec `json:"secret,omitempty"`
 
 	// Parameters is used to pass additional parameters to the CSI driver.
+	// +kubebuilder:deprecatedversion:warning="specifying parameters in networkfence is deprecated, please use networkFenceClassName instead"
 	// +kubebuilder:validation:XValidation:rule="self == oldSelf",message="parameters are immutable"
 	Parameters map[string]string `json:"parameters,omitempty"`
 }