Added AWS dedicated host support

Author: vr4manta

features/features.go

@@ -752,8 +752,8 @@ var (
 					mustRegister()
 
 	FeatureGateAWSDedicatedHosts = newFeatureGate("AWSDedicatedHosts").
-					reportProblemsToJiraComponent("Installer").
-					contactPerson("faermanj").
+					reportProblemsToJiraComponent("splat").
+					contactPerson("rvanderp3").
 					productScope(ocpSpecific).
 					enhancementPR("https://github.com/openshift/enhancements/pull/1781").
 					enableIn(configv1.DevPreviewNoUpgrade, configv1.TechPreviewNoUpgrade).

machine/v1beta1/types_awsprovider.go

@@ -114,6 +114,14 @@ type AWSMachineProviderConfig struct {
 	// If this value is selected, capacityReservationID must be specified to identify the target reservation.
 	// +optional
 	MarketType MarketType `json:"marketType,omitempty"`
+
+	// hostPlacement configures placement on AWS Dedicated Hosts. This allows admins to assign instances to specific host
+	// for a variety of needs including for regulatory compliance, to leverage existing per-socket or per-core software licenses (BYOL),
+	// and to gain visibility and control over instance placement on a physical server.
+	// When omitted, the instance is not constrained to a dedicated host.
+	// +openshift:enable:FeatureGate=AWSDedicatedHosts
+	// +optional
+	HostPlacement *HostPlacement `json:"hostPlacement,omitempty"`
 }
 
 // AWSConfidentialComputePolicy represents the confidential compute configuration for the instance.
@@ -393,3 +401,46 @@ const (
 	// When set to CapacityBlock the instance utilizes pre-purchased compute capacity (capacity blocks) with AWS Capacity Reservations.
 	MarketTypeCapacityBlock MarketType = "CapacityBlock"
 )
+
+// HostPlacement is the type that will be used to configure the placement of AWS instances.
+// +kubebuilder:validation:XValidation:rule="has(self.type) && self.affinity == 'DedicatedHost' ?  has(self.dedicated) : !has(self.dedicated)",message="dedicated is required when affinity is DedicatedHost, and forbidden otherwise"
+// +union
+type HostPlacement struct {
+	// affinity specifies the affinity setting for the instance.
+	// Allowed values are AnyAvailable and DedicatedHost.
+	// When Affinity is set to DedicatedHost, an instance started onto a specific host always restarts on the same host if stopped. In this scenario, the `dedicated` field must be set.
+	// When Affinity is set to AnyAvailable, and you stop and restart the instance, it can be restarted on any available host.
+	// +required
+	// +unionDiscriminator
+	Affinity HostAffinity `json:"affinity,omitempty"`
+
+	// dedicatedHost specifies a particular dedicated host when required by affinity set to DedicatedHost.
+	// dedicatedHost is required when 'affinity' is set to DedicatedHost, and forbidden otherwise.
+	// +optional
+	// +unionMember
+	DedicatedHost *DedicatedHost `json:"dedicatedHost,omitempty"`
+}
+
+// HostAffinity selects how an instance should be placed on AWS Dedicated Hosts.
+// +kubebuilder:validation:Enum:=DedicatedHost;AnyAvailable
+type HostAffinity string
+
+const (
+	// HostAffinityAnyAvailable lets the platform select any available dedicated host.
+	HostAffinityAnyAvailable HostAffinity = "AnyAvailable"
+
+	// HostAffinityDedicatedHost requires specifying a particular host via dedicatedHost.host.hostID.
+	HostAffinityDedicatedHost HostAffinity = "DedicatedHost"
+)
+
+// DedicatedHost represents the configuration for the usage of dedicated host.
+type DedicatedHost struct {
+	// id identifies the AWS Dedicated Host on which the instance must run.
+	// The value must start with "h-" followed by 17 lowercase hexadecimal characters (0-9 and a-f).
+	// Must be exactly 19 characters in length.
+	// +kubebuilder:validation:XValidation:rule="self.matches('^h-[0-9a-f]{17}$')",message="hostID must start with 'h-' followed by 17 lowercase hexadecimal characters (0-9 and a-f)"
+	// +kubebuilder:validation:MinLength=19
+	// +kubebuilder:validation:MaxLength=19
+	// +required
+	ID string `json:"id,omitempty"`
+}