Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/pkg/kubelet/kubelet_network.go

@@ -0,0 +1,167 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package kubelet
+
+import (
+	"fmt"
+
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
+	utiliptables "k8s.io/kubernetes/pkg/util/iptables"
+)
+
+const (
+	// KubeMarkMasqChain is the mark-for-masquerade chain
+	// TODO: clean up this logic in kube-proxy
+	KubeMarkMasqChain utiliptables.Chain = "KUBE-MARK-MASQ"
+
+	// KubeMarkDropChain is the mark-for-drop chain
+	KubeMarkDropChain utiliptables.Chain = "KUBE-MARK-DROP"
+
+	// KubePostroutingChain is kubernetes postrouting rules
+	KubePostroutingChain utiliptables.Chain = "KUBE-POSTROUTING"
+
+	// KubeFirewallChain is kubernetes firewall rules
+	KubeFirewallChain utiliptables.Chain = "KUBE-FIREWALL"
+)
+
+// providerRequiresNetworkingConfiguration returns whether the cloud provider
+// requires special networking configuration.
+func (kl *Kubelet) providerRequiresNetworkingConfiguration() bool {
+	// TODO: We should have a mechanism to say whether native cloud provider
+	// is used or whether we are using overlay networking. We should return
+	// true for cloud providers if they implement Routes() interface and
+	// we are not using overlay networking.
+	if kl.cloud == nil || kl.cloud.ProviderName() != "gce" {
+		return false
+	}
+	_, supported := kl.cloud.Routes()
+	return supported
+}
+
+// updatePodCIDR updates the pod CIDR in the runtime state if it is different
+// from the current CIDR.
+func (kl *Kubelet) updatePodCIDR(cidr string) {
+	podCIDR := kl.runtimeState.podCIDR()
+
+	if podCIDR == cidr {
+		return
+	}
+
+	// kubelet -> generic runtime -> runtime shim -> network plugin
+	// docker/non-cri implementations have a passthrough UpdatePodCIDR
+	if err := kl.getRuntime().UpdatePodCIDR(cidr); err != nil {
+		glog.Errorf("Failed to update pod CIDR: %v", err)
+		return
+	}
+
+	glog.Infof("Setting Pod CIDR: %v -> %v", podCIDR, cidr)
+	kl.runtimeState.setPodCIDR(cidr)
+}
+
+// syncNetworkUtil ensures the network utility are present on host.
+// Network util includes:
+// 1. 	In nat table, KUBE-MARK-DROP rule to mark connections for dropping
+// 	Marked connection will be drop on INPUT/OUTPUT Chain in filter table
+// 2. 	In nat table, KUBE-MARK-MASQ rule to mark connections for SNAT
+// 	Marked connection will get SNAT on POSTROUTING Chain in nat table
+func (kl *Kubelet) syncNetworkUtil() {
+	if kl.iptablesMasqueradeBit < 0 || kl.iptablesMasqueradeBit > 31 {
+		glog.Errorf("invalid iptables-masquerade-bit %v not in [0, 31]", kl.iptablesMasqueradeBit)
+		return
+	}
+
+	if kl.iptablesDropBit < 0 || kl.iptablesDropBit > 31 {
+		glog.Errorf("invalid iptables-drop-bit %v not in [0, 31]", kl.iptablesDropBit)
+		return
+	}
+
+	if kl.iptablesDropBit == kl.iptablesMasqueradeBit {
+		glog.Errorf("iptables-masquerade-bit %v and iptables-drop-bit %v must be different", kl.iptablesMasqueradeBit, kl.iptablesDropBit)
+		return
+	}
+
+	// Setup KUBE-MARK-DROP rules
+	dropMark := getIPTablesMark(kl.iptablesDropBit)
+	if _, err := kl.iptClient.EnsureChain(utiliptables.TableNAT, KubeMarkDropChain); err != nil {
+		glog.Errorf("Failed to ensure that %s chain %s exists: %v", utiliptables.TableNAT, KubeMarkDropChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureRule(utiliptables.Append, utiliptables.TableNAT, KubeMarkDropChain, "-j", "MARK", "--set-xmark", dropMark); err != nil {
+		glog.Errorf("Failed to ensure marking rule for %v: %v", KubeMarkDropChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureChain(utiliptables.TableFilter, KubeFirewallChain); err != nil {
+		glog.Errorf("Failed to ensure that %s chain %s exists: %v", utiliptables.TableFilter, KubeFirewallChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureRule(utiliptables.Append, utiliptables.TableFilter, KubeFirewallChain,
+		"-m", "comment", "--comment", "kubernetes firewall for dropping marked packets",
+		"-m", "mark", "--mark", dropMark,
+		"-j", "DROP"); err != nil {
+		glog.Errorf("Failed to ensure rule to drop packet marked by %v in %v chain %v: %v", KubeMarkDropChain, utiliptables.TableFilter, KubeFirewallChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureRule(utiliptables.Prepend, utiliptables.TableFilter, utiliptables.ChainOutput, "-j", string(KubeFirewallChain)); err != nil {
+		glog.Errorf("Failed to ensure that %s chain %s jumps to %s: %v", utiliptables.TableFilter, utiliptables.ChainOutput, KubeFirewallChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureRule(utiliptables.Prepend, utiliptables.TableFilter, utiliptables.ChainInput, "-j", string(KubeFirewallChain)); err != nil {
+		glog.Errorf("Failed to ensure that %s chain %s jumps to %s: %v", utiliptables.TableFilter, utiliptables.ChainInput, KubeFirewallChain, err)
+		return
+	}
+
+	// Setup KUBE-MARK-MASQ rules
+	masqueradeMark := getIPTablesMark(kl.iptablesMasqueradeBit)
+	if _, err := kl.iptClient.EnsureChain(utiliptables.TableNAT, KubeMarkMasqChain); err != nil {
+		glog.Errorf("Failed to ensure that %s chain %s exists: %v", utiliptables.TableNAT, KubeMarkMasqChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureChain(utiliptables.TableNAT, KubePostroutingChain); err != nil {
+		glog.Errorf("Failed to ensure that %s chain %s exists: %v", utiliptables.TableNAT, KubePostroutingChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureRule(utiliptables.Append, utiliptables.TableNAT, KubeMarkMasqChain, "-j", "MARK", "--set-xmark", masqueradeMark); err != nil {
+		glog.Errorf("Failed to ensure marking rule for %v: %v", KubeMarkMasqChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureRule(utiliptables.Prepend, utiliptables.TableNAT, utiliptables.ChainPostrouting,
+		"-m", "comment", "--comment", "kubernetes postrouting rules", "-j", string(KubePostroutingChain)); err != nil {
+		glog.Errorf("Failed to ensure that %s chain %s jumps to %s: %v", utiliptables.TableNAT, utiliptables.ChainPostrouting, KubePostroutingChain, err)
+		return
+	}
+	if _, err := kl.iptClient.EnsureRule(utiliptables.Append, utiliptables.TableNAT, KubePostroutingChain,
+		"-m", "comment", "--comment", "kubernetes service traffic requiring SNAT",
+		"-m", "mark", "--mark", masqueradeMark, "-j", "MASQUERADE"); err != nil {
+		glog.Errorf("Failed to ensure SNAT rule for packets marked by %v in %v chain %v: %v", KubeMarkMasqChain, utiliptables.TableNAT, KubePostroutingChain, err)
+		return
+	}
+}
+
+// getIPTablesMark returns the fwmark given the bit
+func getIPTablesMark(bit int) string {
+	value := 1 << uint(bit)
+	return fmt.Sprintf("%#08x/%#08x", value, value)
+}
+
+// GetPodDNS returns DNS settings for the pod.
+// This function is defined in kubecontainer.RuntimeHelper interface so we
+// have to implement it.
+func (kl *Kubelet) GetPodDNS(pod *v1.Pod) (*runtimeapi.DNSConfig, error) {
+	return kl.dnsConfigurer.GetPodDNS(pod)
+}