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move IPv6DualStack feature to stable. (#104691)

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* kube-proxy

* endpoints controller

* app: kube-controller-manager

* app: cloud-controller-manager

* kubelet

* app: api-server

* node utils + registry/strategy

* api: validation (comment removal)

* api:pod strategy (util pkg)

* api: docs

* core: integration testing

* kubeadm: change feature gate to GA

* service registry and rest stack

* move feature to GA

* generated
This commit is contained in:
Khaled Henidak (Kal)
2021-09-24 16:30:22 -07:00
committed by GitHub
parent c74d799677
commit a53e2eaeab
42 changed files with 455 additions and 1373 deletions
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58
pkg/controller/endpoint/endpoints_controller.go
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@@ -30,7 +30,6 @@ import (
"k8s.io/apimachinery/pkg/labels"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
utilfeature "k8s.io/apiserver/pkg/util/feature"
coreinformers "k8s.io/client-go/informers/core/v1"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
@@ -48,7 +47,6 @@ import (
helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
"k8s.io/kubernetes/pkg/controller"
endpointutil "k8s.io/kubernetes/pkg/controller/util/endpoint"
"k8s.io/kubernetes/pkg/features"
utillabels "k8s.io/kubernetes/pkg/util/labels"
utilnet "k8s.io/utils/net"
)
@@ -229,42 +227,38 @@ func podToEndpointAddressForService(svc *v1.Service, pod *v1.Pod) (*v1.EndpointA
var endpointIP string
ipFamily := v1.IPv4Protocol
if !utilfeature.DefaultFeatureGate.Enabled(features.IPv6DualStack) {
// In a legacy cluster, the pod IP is guaranteed to be usable
endpointIP = pod.Status.PodIP
if len(svc.Spec.IPFamilies) > 0 {
// controller is connected to an api-server that correctly sets IPFamilies
ipFamily = svc.Spec.IPFamilies[0] // this works for headful and headless
} else {
//feature flag enabled and pods may have multiple IPs
if len(svc.Spec.IPFamilies) > 0 {
// controller is connected to an api-server that correctly sets IPFamilies
ipFamily = svc.Spec.IPFamilies[0] // this works for headful and headless
// controller is connected to an api server that does not correctly
// set IPFamilies (e.g. old api-server during an upgrade)
// TODO (khenidak): remove by when the possibility of upgrading
// from a cluster that does not support dual stack is nil
if len(svc.Spec.ClusterIP) > 0 && svc.Spec.ClusterIP != v1.ClusterIPNone {
// headful service. detect via service clusterIP
if utilnet.IsIPv6String(svc.Spec.ClusterIP) {
ipFamily = v1.IPv6Protocol
}
} else {
// controller is connected to an api server that does not correctly
// set IPFamilies (e.g. old api-server during an upgrade)
if len(svc.Spec.ClusterIP) > 0 && svc.Spec.ClusterIP != v1.ClusterIPNone {
// headful service. detect via service clusterIP
if utilnet.IsIPv6String(svc.Spec.ClusterIP) {
ipFamily = v1.IPv6Protocol
}
} else {
// Since this is a headless service we use podIP to identify the family.
// This assumes that status.PodIP is assigned correctly (follows pod cidr and
// pod cidr list order is same as service cidr list order). The expectation is
// this is *most probably* the case.
// Since this is a headless service we use podIP to identify the family.
// This assumes that status.PodIP is assigned correctly (follows pod cidr and
// pod cidr list order is same as service cidr list order). The expectation is
// this is *most probably* the case.
// if the family was incorrectly identified then this will be corrected once the
// the upgrade is completed (controller connects to api-server that correctly defaults services)
if utilnet.IsIPv6String(pod.Status.PodIP) {
ipFamily = v1.IPv6Protocol
}
// if the family was incorrectly identified then this will be corrected once the
// the upgrade is completed (controller connects to api-server that correctly defaults services)
if utilnet.IsIPv6String(pod.Status.PodIP) {
ipFamily = v1.IPv6Protocol
}
}
}
// find an ip that matches the family
for _, podIP := range pod.Status.PodIPs {
if (ipFamily == v1.IPv6Protocol) == utilnet.IsIPv6String(podIP.IP) {
endpointIP = podIP.IP
break
}
// find an ip that matches the family
for _, podIP := range pod.Status.PodIPs {
if (ipFamily == v1.IPv6Protocol) == utilnet.IsIPv6String(podIP.IP) {
endpointIP = podIP.IP
break
}
}