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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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26
pkg/kubelet/kubelet_network_linux.go
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@@ -24,9 +24,7 @@ import (
"time"
"k8s.io/apimachinery/pkg/util/wait"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/klog/v2"
"k8s.io/kubernetes/pkg/features"
utiliptables "k8s.io/kubernetes/pkg/util/iptables"
utilexec "k8s.io/utils/exec"
utilnet "k8s.io/utils/net"
@@ -34,21 +32,23 @@ import (
func (kl *Kubelet) initNetworkUtil() {
exec := utilexec.New()
// At this point in startup we don't know the actual node IPs, so we configure dual stack iptables
// rules if the node _might_ be dual-stack, and single-stack based on requested nodeIPs[0] otherwise.
maybeDualStack := utilfeature.DefaultFeatureGate.Enabled(features.IPv6DualStack)
// TODO: @khenidak review when there is no IPv6 iptables exec what should happen here (note: no error returned from this func)
ipv6Primary := kl.nodeIPs != nil && utilnet.IsIPv6(kl.nodeIPs[0])
var iptClients []utiliptables.Interface
var protocols []utiliptables.Protocol
if maybeDualStack || !ipv6Primary {
protocols = append(protocols, utiliptables.ProtocolIPv4)
iptClients = append(iptClients, utiliptables.New(exec, utiliptables.ProtocolIPv4))
}
if maybeDualStack || ipv6Primary {
protocols = append(protocols, utiliptables.ProtocolIPv6)
iptClients = append(iptClients, utiliptables.New(exec, utiliptables.ProtocolIPv6))
// assume 4,6
protocols = append(protocols, utiliptables.ProtocolIPv4)
iptClients = append(iptClients, utiliptables.New(exec, utiliptables.ProtocolIPv4))
protocols = append(protocols, utiliptables.ProtocolIPv6)
iptClients = append(iptClients, utiliptables.New(exec, utiliptables.ProtocolIPv6))
// and if they are not
if ipv6Primary {
protocols[0], protocols[1] = protocols[1], protocols[0]
iptClients[0], iptClients[1] = iptClients[1], iptClients[0]
}
for i := range iptClients {