Ability to Customize HAProxy 2.x Error Page

https://issues.redhat.com/browse/NE-379

operator/v1/0000_50_ingress-operator_00-ingresscontroller.crd.yaml

@@ -279,6 +279,24 @@ spec:
                 required:
                 - type
                 type: object
+              httpErrorCodePages:
+                description: httpErrorCodePages specifies a configmap with custom
+                  error pages. The administrator must create this configmap in the
+                  openshift-config namespace. This configmap should have keys in the
+                  format "error-page-<error code>.http", where <error code> is an
+                  HTTP error code. For example, "error-page-503.http" defines an error
+                  page for HTTP 503 responses. Currently only error pages for 503
+                  and 404 responses can be customized. Each value in the configmap
+                  should be the full response, including HTTP headers. If this field
+                  is empty, the ingress controller uses the default error pages.
+                properties:
+                  name:
+                    description: name is the metadata.name of the referenced config
+                      map
+                    type: string
+                required:
+                - name
+                type: object
               httpHeaderBuffer:
                 description: httpHeaderBuffer defines parameters for header buffer
                   size values. If this field is empty, the default values are used.

operator/v1/types_ingress.go

@@ -60,6 +60,16 @@ type IngressControllerSpec struct {
 	// +optional
 	Domain string `json:"domain,omitempty"`
 
+	// httpErrorCodePages specifies a configmap with custom error pages.
+	// The administrator must create this configmap in the openshift-config namespace.
+	// This configmap should have keys in the format "error-page-<error code>.http",
+	// where <error code> is an HTTP error code.
+	// For example, "error-page-503.http" defines an error page for HTTP 503 responses.
+	// Currently only error pages for 503 and 404 responses can be customized.
+	// Each value in the configmap should be the full response, including HTTP headers.
+	// If this field is empty, the ingress controller uses the default error pages.
+	HttpErrorCodePages configv1.ConfigMapNameReference `json:"httpErrorCodePages,omitempty"`
+
 	// replicas is the desired number of ingress controller replicas. If unset,
 	// defaults to 2.
 	//