feat: Add ability to patch dataplane Service, Deployment, and DaemonSet in NginxProxy (#3630)

* Add ability to patch dataplane Service, Deployment, and DaemonSet in NginxProxy

Author: ciarams87

apis/v1alpha2/nginxproxy_types.go

@@ -2,6 +2,7 @@ package v1alpha2
 
 import (
 	corev1 "k8s.io/api/core/v1"
+	apiextv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	"github.com/nginx/nginx-gateway-fabric/apis/v1alpha1"
@@ -388,6 +389,36 @@ type KubernetesSpec struct {
 	Service *ServiceSpec `json:"service,omitempty"`
 }
 
+// Patch defines a patch to apply to a Kubernetes object.
+type Patch struct {
+	// Type is the type of patch. Defaults to StrategicMerge.
+	//
+	// +optional
+	// +kubebuilder:default:=StrategicMerge
+	Type *PatchType `json:"type,omitempty"`
+
+	// Value is the patch data as raw JSON.
+	// For StrategicMerge and Merge patches, this should be a JSON object.
+	// For JSONPatch patches, this should be a JSON array of patch operations.
+	//
+	// +optional
+	// +kubebuilder:validation:XPreserveUnknownFields
+	Value *apiextv1.JSON `json:"value,omitempty"`
+}
+
+// PatchType specifies the type of patch.
+// +kubebuilder:validation:Enum=StrategicMerge;Merge;JSONPatch
+type PatchType string
+
+const (
+	// PatchTypeStrategicMerge uses strategic merge patch.
+	PatchTypeStrategicMerge PatchType = "StrategicMerge"
+	// PatchTypeMerge uses merge patch (RFC 7386).
+	PatchTypeMerge PatchType = "Merge"
+	// PatchTypeJSONPatch uses JSON patch (RFC 6902).
+	PatchTypeJSONPatch PatchType = "JSONPatch"
+)
+
 // Deployment is the configuration for the NGINX Deployment.
 type DeploymentSpec struct {
 	// Container defines container fields for the NGINX container.
@@ -404,6 +435,11 @@ type DeploymentSpec struct {
 	//
 	// +optional
 	Pod PodSpec `json:"pod"`
+
+	// Patches are custom patches to apply to the NGINX Deployment.
+	//
+	// +optional
+	Patches []Patch `json:"patches,omitempty"`
 }
 
 // DaemonSet is the configuration for the NGINX DaemonSet.
@@ -417,6 +453,11 @@ type DaemonSetSpec struct {
 	//
 	// +optional
 	Pod PodSpec `json:"pod"`
+
+	// Patches are custom patches to apply to the NGINX DaemonSet.
+	//
+	// +optional
+	Patches []Patch `json:"patches,omitempty"`
 }
 
 // PodSpec defines Pod-specific fields.
@@ -594,6 +635,11 @@ type ServiceSpec struct {
 	//
 	// +optional
 	NodePorts []NodePort `json:"nodePorts,omitempty"`
+
+	// Patches are custom patches to apply to the NGINX Service.
+	//
+	// +optional
+	Patches []Patch `json:"patches,omitempty"`
 }
 
 // ServiceType describes ingress method for the Service.

apis/v1alpha2/zz_generated.deepcopy.go

@@ -511,6 +511,30 @@ spec:
                               type: object
                             type: array
                         type: object
+                      patches:
+                        description: Patches are custom patches to apply to the NGINX
+                          DaemonSet.
+                        items:
+                          description: Patch defines a patch to apply to a Kubernetes
+                            object.
+                          properties:
+                            type:
+                              default: StrategicMerge
+                              description: Type is the type of patch. Defaults to
+                                StrategicMerge.
+                              enum:
+                              - StrategicMerge
+                              - Merge
+                              - JSONPatch
+                              type: string
+                            value:
+                              description: |-
+                                Value is the patch data as raw JSON.
+                                For StrategicMerge and Merge patches, this should be a JSON object.
+                                For JSONPatch patches, this should be a JSON array of patch operations.
+                              x-kubernetes-preserve-unknown-fields: true
+                          type: object
+                        type: array
                       pod:
                         description: Pod defines Pod-specific fields.
                         properties:
@@ -3944,6 +3968,30 @@ spec:
                               type: object
                             type: array
                         type: object
+                      patches:
+                        description: Patches are custom patches to apply to the NGINX
+                          Deployment.
+                        items:
+                          description: Patch defines a patch to apply to a Kubernetes
+                            object.
+                          properties:
+                            type:
+                              default: StrategicMerge
+                              description: Type is the type of patch. Defaults to
+                                StrategicMerge.
+                              enum:
+                              - StrategicMerge
+                              - Merge
+                              - JSONPatch
+                              type: string
+                            value:
+                              description: |-
+                                Value is the patch data as raw JSON.
+                                For StrategicMerge and Merge patches, this should be a JSON object.
+                                For JSONPatch patches, this should be a JSON array of patch operations.
+                              x-kubernetes-preserve-unknown-fields: true
+                          type: object
+                        type: array
                       pod:
                         description: Pod defines Pod-specific fields.
                         properties:
@@ -6996,6 +7044,30 @@ spec:
                           - port
                           type: object
                         type: array
+                      patches:
+                        description: Patches are custom patches to apply to the NGINX
+                          Service.
+                        items:
+                          description: Patch defines a patch to apply to a Kubernetes
+                            object.
+                          properties:
+                            type:
+                              default: StrategicMerge
+                              description: Type is the type of patch. Defaults to
+                                StrategicMerge.
+                              enum:
+                              - StrategicMerge
+                              - Merge
+                              - JSONPatch
+                              type: string
+                            value:
+                              description: |-
+                                Value is the patch data as raw JSON.
+                                For StrategicMerge and Merge patches, this should be a JSON object.
+                                For JSONPatch patches, this should be a JSON array of patch operations.
+                              x-kubernetes-preserve-unknown-fields: true
+                          type: object
+                        type: array
                       type:
                         default: LoadBalancer
                         description: ServiceType describes ingress method for the