NE-1516: Adds a field in the cluster ingress config object and Ingres…

…s Controller to set EIP via installer and Ingress Controller

`config/v1/types_ingress.go` - Adds an API field `eip-allocations` in the cluster ingress config object whose value is set by the installer using install-config.yaml
`operator/v1/types_ingress.go` - Adds an API field `eip-allocations` in the Ingress Controller CR object using which the Ingress Operator scales an Ingress Controller
with service type balancer whose annotation `service.beta.kubernetes.io/aws-load-balancer-eip-allocations` is set by the value of the field `eip-allocations` of the Ingress Controller.
Epic: https://issues.redhat.com/browse/NE-1274
Story: https://issues.redhat.com/browse/NE-1516

config/v1/feature_gates.go

@@ -206,6 +206,13 @@ var (
 				enableIn(TechPreviewNoUpgrade).
 				mustRegister()
 
+	FeatureGateSetEIPForNLBIngressController = newFeatureGate("SetEIPForNLBIngressController").
+							reportProblemsToJiraComponent("Routing").
+							contactPerson("miheer").
+							productScope(ocpSpecific).
+							enableIn(TechPreviewNoUpgrade).
+							mustRegister()
+
 	FeatureGateOpenShiftPodSecurityAdmission = newFeatureGate("OpenShiftPodSecurityAdmission").
 							reportProblemsToJiraComponent("auth").
 							contactPerson("stlaz").

config/v1/types_ingress.go

@@ -130,6 +130,7 @@ type LoadBalancer struct {
 
 // AWSIngressSpec holds the desired state of the Ingress for Amazon Web Services infrastructure provider.
 // This only includes fields that can be modified in the cluster.
+// +kubebuilder:validation:XValidation:rule="self.type != 'Classic' && !has(self.networkLoadBalancer)",message="Network load balancer parameters are allowed only when load balancer type is NLB."
 // +union
 type AWSIngressSpec struct {
 	// type allows user to set a load balancer type.
@@ -151,8 +152,23 @@ type AWSIngressSpec struct {
 	// +kubebuilder:validation:Enum:=NLB;Classic
 	// +kubebuilder:validation:Required
 	Type AWSLBType `json:"type,omitempty"`
+
+	// networkLoadBalancerParameters holds configuration parameters for an AWS
+	// network load balancer. Present only if type is NLB.
+	//
+	// +optional
+	NetworkLoadBalancerParameters *AWSNetworkLoadBalancerParameters `json:"networkLoadBalancer,omitempty"`
 }
 
+// AWSNetworkLoadBalancerParameters holds configuration parameters for an
+// AWS Network load balancer.
+// +openshift:enable:FeatureGate=SetEIPForNLBIngressController
+type AWSNetworkLoadBalancerParameters struct {
+	EIPAllocations []EIPAllocations `json:"eip-allocations,omitempty"`
+}
+
+type EIPAllocations string
+
 type AWSLBType string
 
 const (

config/v1/zz_generated.crd-manifests/0000_10_config-operator_01_ingresses.crd.yaml

@@ -133,6 +133,16 @@ spec:
                         description: aws contains settings specific to the Amazon
                           Web Services infrastructure provider.
                         properties:
+                          networkLoadBalancer:
+                            description: networkLoadBalancerParameters holds configuration
+                              parameters for an AWS network load balancer. Present
+                              only if type is NLB.
+                            properties:
+                              eip-allocations:
+                                items:
+                                  type: string
+                                type: array
+                            type: object
                           type:
                             description: "type allows user to set a load balancer
                               type. When this field is set the default ingresscontroller
@@ -153,6 +163,10 @@ spec:
                         required:
                         - type
                         type: object
+                        x-kubernetes-validations:
+                        - message: Network load balancer parameters are allowed only
+                            when load balancer type is NLB.
+                          rule: self.type != 'Classic' && !has(self.networkLoadBalancer)
                       type:
                         description: type is the underlying infrastructure provider
                           for the cluster. Allowed values are "AWS", "Azure", "BareMetal",

config/v1/zz_generated.featuregated-crd-manifests.yaml

@@ -323,7 +323,8 @@ ingresses.config.openshift.io:
   CRDName: ingresses.config.openshift.io
   Capability: ""
   Category: ""
-  FeatureGates: []
+  FeatureGates:
+  - SetEIPForNLBIngressController
   FilenameOperatorName: config-operator
   FilenameOperatorOrdering: "01"
   FilenameRunLevel: "0000_10"

config/v1/zz_generated.featuregated-crd-manifests/ingresses.config.openshift.io/AAA_ungated.yaml

@@ -134,6 +134,16 @@ spec:
                         description: aws contains settings specific to the Amazon
                           Web Services infrastructure provider.
                         properties:
+                          networkLoadBalancer:
+                            description: networkLoadBalancerParameters holds configuration
+                              parameters for an AWS network load balancer. Present
+                              only if type is NLB.
+                            properties:
+                              eip-allocations:
+                                items:
+                                  type: string
+                                type: array
+                            type: object
                           type:
                             description: "type allows user to set a load balancer
                               type. When this field is set the default ingresscontroller
@@ -154,6 +164,10 @@ spec:
                         required:
                         - type
                         type: object
+                        x-kubernetes-validations:
+                        - message: Network load balancer parameters are allowed only
+                            when load balancer type is NLB.
+                          rule: self.type != 'Classic' && !has(self.networkLoadBalancer)
                       type:
                         description: type is the underlying infrastructure provider
                           for the cluster. Allowed values are "AWS", "Azure", "BareMetal",