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Merge pull request #90853 from kumarvin123/feature/IPv6DualStackProxy

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KubeProxy and DockerShim changes for Ipv6 dual stack support on Windows
This commit is contained in:
Kubernetes Prow Robot 2020-06-11 19:07:55 -07:00 committed by GitHub
commit bc9c5afaf0
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6 changed files with 130 additions and 25 deletions
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1
cmd/kube-proxy/app/BUILD
View File

@ -218,6 +218,7 @@ go_library(
"//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/net:go_default_library",
"//staging/src/k8s.io/component-base/metrics:go_default_library",
"//vendor/k8s.io/utils/net:go_default_library",
],
"//conditions:default": [],
}),

69
cmd/kube-proxy/app/server_windows.go
View File

@ -28,12 +28,15 @@ import (
// Enable pprof HTTP handlers.
_ "net/http/pprof"
"k8s.io/api/core/v1"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
utilnet "k8s.io/apimachinery/pkg/util/net"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/client-go/tools/record"
"k8s.io/component-base/configz"
"k8s.io/component-base/metrics"
"k8s.io/klog/v2"
"k8s.io/kubernetes/pkg/features"
"k8s.io/kubernetes/pkg/proxy"
proxyconfigapi "k8s.io/kubernetes/pkg/proxy/apis/config"
proxyconfigscheme "k8s.io/kubernetes/pkg/proxy/apis/config/scheme"
@ -43,8 +46,7 @@ import (
utilnetsh "k8s.io/kubernetes/pkg/util/netsh"
utilnode "k8s.io/kubernetes/pkg/util/node"
"k8s.io/utils/exec"
"k8s.io/klog/v2"
utilsnet "k8s.io/utils/net"
)
// NewProxyServer returns a new ProxyServer.
@ -102,18 +104,39 @@ func newProxyServer(config *proxyconfigapi.KubeProxyConfiguration, cleanupAndExi
proxyMode := getProxyMode(string(config.Mode), winkernel.WindowsKernelCompatTester{})
if proxyMode == proxyModeKernelspace {
klog.V(0).Info("Using Kernelspace Proxier.")
proxier, err = winkernel.NewProxier(
config.IPTables.SyncPeriod.Duration,
config.IPTables.MinSyncPeriod.Duration,
config.IPTables.MasqueradeAll,
int(*config.IPTables.MasqueradeBit),
config.ClusterCIDR,
hostname,
utilnode.GetNodeIP(client, hostname),
recorder,
healthzServer,
config.Winkernel,
)
isIPv6DualStackEnabled := utilfeature.DefaultFeatureGate.Enabled(features.IPv6DualStack)
if isIPv6DualStackEnabled {
klog.V(0).Info("creating dualStackProxier for Windows kernel.")
proxier, err = winkernel.NewDualStackProxier(
config.IPTables.SyncPeriod.Duration,
config.IPTables.MinSyncPeriod.Duration,
config.IPTables.MasqueradeAll,
int(*config.IPTables.MasqueradeBit),
config.ClusterCIDR,
hostname,
nodeIPTuple(config.BindAddress),
recorder,
healthzServer,
config.Winkernel,
)
} else {
proxier, err = winkernel.NewProxier(
config.IPTables.SyncPeriod.Duration,
config.IPTables.MinSyncPeriod.Duration,
config.IPTables.MasqueradeAll,
int(*config.IPTables.MasqueradeBit),
config.ClusterCIDR,
hostname,
utilnode.GetNodeIP(client, hostname),
recorder,
healthzServer,
config.Winkernel,
)
}
if err != nil {
return nil, fmt.Errorf("unable to create proxier: %v", err)
}
@ -181,3 +204,19 @@ func tryWinKernelSpaceProxy(kcompat winkernel.KernelCompatTester) string {
klog.V(1).Infof("Can't use winkernel proxy, using userspace proxier")
return proxyModeUserspace
}
// nodeIPTuple takes an addresses and return a tuple (ipv4,ipv6)
// The returned tuple is guaranteed to have the order (ipv4,ipv6). The address NOT of the passed address
// will have "any" address (0.0.0.0 or ::) inserted.
func nodeIPTuple(bindAddress string) [2]net.IP {
nodes := [2]net.IP{net.IPv4zero, net.IPv6zero}
adr := net.ParseIP(bindAddress)
if utilsnet.IsIPv6(adr) {
nodes[1] = adr
} else {
nodes[0] = adr
}
return nodes
}

13
pkg/kubelet/dockershim/network/cni/cni_windows.go
View File

@ -21,13 +21,13 @@ package cni
import (
"context"
"fmt"
"time"
cniTypes020 "github.com/containernetworking/cni/pkg/types/020"
runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
"k8s.io/klog/v2"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
"k8s.io/kubernetes/pkg/kubelet/dockershim/network"
"net"
"time"
)
func getLoNetwork(binDirs []string) *cniNetwork {
@ -67,7 +67,14 @@ func (plugin *cniNetworkPlugin) GetPodNetworkStatus(namespace string, name strin
klog.Errorf("error while cni parsing result: %s", err)
return nil, err
}
return &network.PodNetworkStatus{IP: result020.IP4.IP.IP}, nil
var list = []net.IP{result020.IP4.IP.IP}
if result020.IP6 != nil {
list = append(list, result020.IP6.IP.IP)
}
return &network.PodNetworkStatus{IP: result020.IP4.IP.IP, IPs: list}, nil
}
// buildDNSCapabilities builds cniDNSConfig from runtimeapi.DNSConfig.

2
pkg/proxy/winkernel/BUILD
View File

@ -21,6 +21,7 @@ go_library(
"//pkg/proxy/apis/config:go_default_library",
"//pkg/proxy/config:go_default_library",
"//pkg/proxy/healthcheck:go_default_library",
"//pkg/proxy/metaproxier:go_default_library",
"//pkg/proxy/metrics:go_default_library",
"//pkg/util/async:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
@ -35,6 +36,7 @@ go_library(
"//vendor/github.com/Microsoft/hcsshim/hcn:go_default_library",
"//vendor/github.com/davecgh/go-spew/spew:go_default_library",
"//vendor/k8s.io/klog/v2:go_default_library",
"//vendor/k8s.io/utils/net:go_default_library",
],
"//conditions:default": [],
}),

15
pkg/proxy/winkernel/hnsV2.go
View File

@ -30,6 +30,11 @@ import (
type hnsV2 struct{}
var (
// LoadBalancerFlagsIPv6 enables IPV6.
LoadBalancerFlagsIPv6 hcn.LoadBalancerFlags = 2
)
func (hns hnsV2) getNetworkByName(name string) (*hnsNetworkInfo, error) {
hnsnetwork, err := hcn.GetNetworkByName(name)
if err != nil {
@ -90,10 +95,14 @@ func (hns hnsV2) getEndpointByIpAddress(ip string, networkName string) (*endpoin
equal := false
if endpoint.IpConfigurations != nil && len(endpoint.IpConfigurations) > 0 {
equal = endpoint.IpConfigurations[0].IpAddress == ip
if !equal && len(endpoint.IpConfigurations) > 1 {
equal = endpoint.IpConfigurations[1].IpAddress == ip
}
}
if equal && strings.EqualFold(endpoint.HostComputeNetwork, hnsnetwork.Id) {
return &endpointsInfo{
ip: endpoint.IpConfigurations[0].IpAddress,
ip: ip,
isLocal: uint32(endpoint.Flags&hcn.EndpointFlagsRemoteEndpoint) == 0, //TODO: Change isLocal to isRemote
macAddress: endpoint.MacAddress,
hnsID: endpoint.Id,
@ -232,6 +241,10 @@ func (hns hnsV2) getLoadBalancer(endpoints []endpointsInfo, flags loadBalancerFl
lbFlags |= hcn.LoadBalancerFlagsDSR
}
if flags.isIPv6 {
lbFlags |= LoadBalancerFlagsIPv6
}
lbDistributionType := hcn.LoadBalancerDistributionNone
if flags.sessionAffinity {

55
pkg/proxy/winkernel/proxier.go
View File

@ -48,8 +48,10 @@ import (
"k8s.io/kubernetes/pkg/proxy/apis/config"
proxyconfig "k8s.io/kubernetes/pkg/proxy/config"
"k8s.io/kubernetes/pkg/proxy/healthcheck"
"k8s.io/kubernetes/pkg/proxy/metaproxier"
"k8s.io/kubernetes/pkg/proxy/metrics"
"k8s.io/kubernetes/pkg/util/async"
utilnet "k8s.io/utils/net"
)
// KernelCompatTester tests whether the required kernel capabilities are
@ -101,6 +103,7 @@ type loadBalancerFlags struct {
useMUX bool
preserveDIP bool
sessionAffinity bool
isIPv6 bool
}
// internal struct for string service information
@ -163,13 +166,17 @@ type endpointsInfo struct {
hns HostNetworkService
}
//Uses mac prefix and IPv4 address to return a mac address
//Uses mac prefix and IP address to return a mac address
//This ensures mac addresses are unique for proper load balancing
//Does not support IPv6 and returns a dummy mac
//There is a possibility of MAC collisions but this Mac address is used for remote endpoints only
//and not sent on the wire.
func conjureMac(macPrefix string, ip net.IP) string {
if ip4 := ip.To4(); ip4 != nil {
a, b, c, d := ip4[0], ip4[1], ip4[2], ip4[3]
return fmt.Sprintf("%v-%02x-%02x-%02x-%02x", macPrefix, a, b, c, d)
} else if ip6 := ip.To16(); ip6 != nil {
a, b, c, d := ip6[15], ip6[14], ip6[13], ip6[12]
return fmt.Sprintf("%v-%02x-%02x-%02x-%02x", macPrefix, a, b, c, d)
}
return "02-11-22-33-44-55"
}
@ -502,6 +509,7 @@ type Proxier struct {
// with some partial data after kube-proxy restart.
endpointsSynced bool
servicesSynced bool
isIPv6Mode bool
initialized int32
syncRunner *async.BoundedFrequencyRunner // governs calls to syncProxyRules
@ -664,6 +672,8 @@ func NewProxier(
}
}
isIPv6 := utilnet.IsIPv6(nodeIP)
proxier := &Proxier{
portsMap: make(map[localPort]closeable),
serviceMap: make(proxyServiceMap),
@ -685,6 +695,7 @@ func NewProxier(
hostMac: hostMac,
isDSR: isDSR,
supportedFeatures: supportedFeatures,
isIPv6Mode: isIPv6,
}
burstSyncs := 2
@ -694,6 +705,38 @@ func NewProxier(
}
func NewDualStackProxier(
syncPeriod time.Duration,
minSyncPeriod time.Duration,
masqueradeAll bool,
masqueradeBit int,
clusterCIDR string,
hostname string,
nodeIP [2]net.IP,
recorder record.EventRecorder,
healthzServer healthcheck.ProxierHealthUpdater,
config config.KubeProxyWinkernelConfiguration,
) (proxy.Provider, error) {
// Create an ipv4 instance of the single-stack proxier
ipv4Proxier, err := NewProxier(syncPeriod, minSyncPeriod, masqueradeAll, masqueradeBit,
clusterCIDR, hostname, nodeIP[0], recorder, healthzServer, config)
if err != nil {
return nil, fmt.Errorf("unable to create ipv4 proxier: %v, hostname: %s, clusterCIDR : %s, nodeIP:%v", err, hostname, clusterCIDR, nodeIP[0])
}
ipv6Proxier, err := NewProxier(syncPeriod, minSyncPeriod, masqueradeAll, masqueradeBit,
clusterCIDR, hostname, nodeIP[1], recorder, healthzServer, config)
if err != nil {
return nil, fmt.Errorf("unable to create ipv6 proxier: %v, hostname: %s, clusterCIDR : %s, nodeIP:%v", err, hostname, clusterCIDR, nodeIP[1])
}
// Return a meta-proxier that dispatch calls between the two
// single-stack proxier instances
return metaproxier.NewMetaProxier(ipv4Proxier, ipv6Proxier), nil
}
// CleanupLeftovers removes all hns rules created by the Proxier
// It returns true if an error was encountered. Errors are logged.
func CleanupLeftovers() (encounteredError bool) {
@ -1275,7 +1318,7 @@ func (proxier *Proxier) syncProxyRules() {
hnsLoadBalancer, err := hns.getLoadBalancer(
hnsEndpoints,
loadBalancerFlags{isDSR: proxier.isDSR, sessionAffinity: sessionAffinityClientIP},
loadBalancerFlags{isDSR: proxier.isDSR, isIPv6: proxier.isIPv6Mode, sessionAffinity: sessionAffinityClientIP},
sourceVip,
svcInfo.clusterIP.String(),
Enum(svcInfo.protocol),
@ -1300,7 +1343,7 @@ func (proxier *Proxier) syncProxyRules() {
}
hnsLoadBalancer, err := hns.getLoadBalancer(
nodePortEndpoints,
loadBalancerFlags{localRoutedVIP: true, sessionAffinity: sessionAffinityClientIP},
loadBalancerFlags{localRoutedVIP: true, sessionAffinity: sessionAffinityClientIP, isIPv6: proxier.isIPv6Mode},
sourceVip,
"",
Enum(svcInfo.protocol),
@ -1321,7 +1364,7 @@ func (proxier *Proxier) syncProxyRules() {
// Try loading existing policies, if already available
hnsLoadBalancer, err = hns.getLoadBalancer(
hnsEndpoints,
loadBalancerFlags{sessionAffinity: sessionAffinityClientIP},
loadBalancerFlags{sessionAffinity: sessionAffinityClientIP, isIPv6: proxier.isIPv6Mode},
sourceVip,
externalIP.ip,
Enum(svcInfo.protocol),
@ -1344,7 +1387,7 @@ func (proxier *Proxier) syncProxyRules() {
}
hnsLoadBalancer, err := hns.getLoadBalancer(
lbIngressEndpoints,
loadBalancerFlags{isDSR: svcInfo.preserveDIP || proxier.isDSR, useMUX: svcInfo.preserveDIP, preserveDIP: svcInfo.preserveDIP, sessionAffinity: sessionAffinityClientIP},
loadBalancerFlags{isDSR: svcInfo.preserveDIP || proxier.isDSR, useMUX: svcInfo.preserveDIP, preserveDIP: svcInfo.preserveDIP, sessionAffinity: sessionAffinityClientIP, isIPv6: proxier.isIPv6Mode},
sourceVip,
lbIngressIP.ip,
Enum(svcInfo.protocol),