feat(ko): document Hybrid Gateway (#3318)

Author: programmer04

app/_how-tos/operator-konnect-hybrid-gw.md

@@ -0,0 +1,108 @@
+---
+title: Provision a Hybrid Gateway
+description: "Provision a Hybrid Gateway in {{site.konnect_short_name}} using the Gateway API CRDs."
+content_type: how_to
+permalink: /operator/konnect/crd/gateway/hybrid
+breadcrumbs:
+  - /operator/
+  - index: operator
+    group: Konnect
+  - index: operator
+    group: Konnect
+    section: "Konnect CRDs: Hybrid Gateway"
+
+
+products:
+  - operator
+
+works_on:
+  - konnect
+
+entities: []
+search_aliases:
+  - kgo gateway
+  - kgo hybrid gateway
+  - konnect hybrid gateway
+
+tldr:
+  q: How do I configure a Hybrid Gateway in {{site.konnect_short_name}}?
+  a: Fill Konnect related fields in `GatewayConfiguration` for `GatewayClass` that will be used for Hybrid Gateways.
+
+prereqs:
+  operator:
+    konnect:
+      auth: true
+
+---
+
+## Create a `GatewayClass` for a Hybrid Gateway
+
+Use the `GatewayConfiguration` resource to configure a `GatewayClass` for Hybrid Gateways. `GatewayConfiguration` is for Hybrid Gateways when field `spec.konnect.authRef` is set.
+
+<!-- vale off -->
+{% konnect_crd %}
+kind: GatewayConfiguration
+apiVersion: gateway-operator.konghq.com/v2beta1
+metadata:
+  name: hybrid-configuration
+  namespace: kong
+spec:
+  konnect:
+    authRef:
+      name: konnect-api-auth
+  dataPlaneOptions:
+    deployment:
+      podTemplateSpec:
+        spec:
+          containers:
+          - name: proxy
+            image: kong/kong-gateway:3.12
+{% endkonnect_crd %}
+<!-- vale on -->
+
+Next configure respective `GatewayClass` to use the above `GatewayConfiguration`.
+
+<!-- vale off -->
+{% konnect_crd %}
+kind: GatewayClass
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: hybrid-class
+spec:
+  controllerName: konghq.com/gateway-operator
+  parametersRef:
+    group: gateway-operator.konghq.com
+    kind: GatewayConfiguration
+    name: hybrid-configuration
+    namespace: kong
+{% endkonnect_crd %}
+<!-- vale on -->
+
+## Create a `Gateway` Resource
+
+Now create a `Gateway` resource that references the `GatewayClass` you just created.
+
+<!-- vale off -->
+{% konnect_crd %}
+kind: Gateway
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: hybrid-gateway
+  namespace: kong
+spec:
+  gatewayClassName: hybrid-class
+  listeners:
+  - name: http
+    protocol: HTTP
+    port: 80
+{% endkonnect_crd %}
+<!-- vale on -->
+
+## Validation
+
+{% validation kubernetes-resource %}
+kind: Gateway
+name: hybrid-gateway
+{% endvalidation %}
+
+The respective `DataPlane` and `KonnectGatewayControlPlane` are created automatically by the Gateway Operator.