apis: add traffic distribution and internal traffic policies fields

Signed-off-by: Arthur Outhenin-Chalandre <[email protected]>

Author: MrFreezeex

config/crd/multicluster.x-k8s.io_serviceimports.yaml

@@ -103,6 +103,15 @@ spec:
                           mycompany.com/my-custom-protocol.
                           Field can be enabled with ServiceAppProtocol feature gate.
                         type: string
+                      internalTrafficPolicy:
+                        description: |-
+                          InternalTrafficPolicy describes how nodes distribute service traffic they
+                          receive on the ClusterIP. If set to "Local", the proxy will assume that pods
+                          only want to talk to endpoints of the service on the same node as the pod,
+                          dropping the traffic if there are no local endpoints. The default value,
+                          "Cluster", uses the standard behavior of routing to all endpoints evenly
+                          (possibly modified by topology and other features).
+                        type: string
                       name:
                         description: |-
                           The name of this port within the service. This must be a DNS_LABEL.
@@ -120,6 +129,15 @@ spec:
                           The IP protocol for this port. Supports "TCP", "UDP", and "SCTP".
                           Default is TCP.
                         type: string
+                      trafficDistribution:
+                        description: |-
+                          TrafficDistribution offers a way to express preferences for how traffic
+                          is distributed to Service endpoints. Implementations can use this field
+                          as a hint, but are not required to guarantee strict adherence. If the
+                          field is not set, the implementation will apply its default routing
+                          strategy. If set to "PreferClose", implementations should prioritize
+                          endpoints that are in the same zone.
+                        type: string
                   x-kubernetes-list-type: atomic
                 sessionAffinity:
                   description: |-

pkg/apis/v1alpha1/serviceexport.go

@@ -265,6 +265,14 @@ const (
 	// annotations.
 	ServiceExportReasonAnnotationsConflict ServiceExportConditionReason = "AnnotationsConflict"
 
+	// ServiceExportReasonInternalTrafficPolicyConflict is used with the "Conflict"
+	// condition when the exported service has a conflict related to internal traffic policy.
+	ServiceExportReasonInternalTrafficPolicyConflict ServiceExportConditionReason = "InternalTrafficPolicyConflict"
+
+	// ServiceExportReasonTrafficDistributionConflict is used with the "Conflict"
+	// condition when the exported service has a conflict related to traffic distribution.
+	ServiceExportReasonTrafficDistributionConflict ServiceExportConditionReason = "TrafficDistributionConflict"
+
 	// ServiceExportReasonNoConflicts is used with the "Conflict" condition
 	// when the condition is False.
 	ServiceExportReasonNoConflicts ServiceExportConditionReason = "NoConflicts"

pkg/apis/v1alpha1/serviceimport.go

@@ -120,6 +120,24 @@ type ServicePort struct {
 
 	// The port that will be exposed by this service.
 	Port int32 `json:"port"`
+
+	// InternalTrafficPolicy describes how nodes distribute service traffic they
+	// receive on the ClusterIP. If set to "Local", the proxy will assume that pods
+	// only want to talk to endpoints of the service on the same node as the pod,
+	// dropping the traffic if there are no local endpoints. The default value,
+	// "Cluster", uses the standard behavior of routing to all endpoints evenly
+	// (possibly modified by topology and other features).
+	// +optional
+	InternalTrafficPolicy *v1.ServiceInternalTrafficPolicy `json:"internalTrafficPolicy,omitempty"`
+
+	// TrafficDistribution offers a way to express preferences for how traffic
+	// is distributed to Service endpoints. Implementations can use this field
+	// as a hint, but are not required to guarantee strict adherence. If the
+	// field is not set, the implementation will apply its default routing
+	// strategy. If set to "PreferClose", implementations should prioritize
+	// endpoints that are in the same zone.
+	// +optional
+	TrafficDistribution *string `json:"trafficDistribution,omitempty"`
 }
 
 // ServiceImportStatus describes derived state of an imported service.