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Merge pull request #91725 from aojea/proxyIPv6mode

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kube-proxy detect IP family based on nodeIP
This commit is contained in:
Kubernetes Prow Robot 2020-06-18 19:04:21 -07:00 committed by GitHub
commit f496b9fb4a
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4 changed files with 183 additions and 48 deletions
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12
cmd/kube-proxy/app/BUILD
View File

@ -235,7 +235,6 @@ go_test(
"//pkg/proxy/apis/config:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//staging/src/k8s.io/component-base/config:go_default_library",
"//staging/src/k8s.io/component-base/configz:go_default_library",
"//vendor/github.com/google/go-cmp/cmp:go_default_library",
"//vendor/github.com/stretchr/testify/assert:go_default_library",
"//vendor/k8s.io/utils/pointer:go_default_library",
@ -246,6 +245,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:darwin": [
"//pkg/proxy/ipvs:go_default_library",
@ -253,6 +253,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:dragonfly": [
"//pkg/proxy/ipvs:go_default_library",
@ -260,6 +261,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:freebsd": [
"//pkg/proxy/ipvs:go_default_library",
@ -267,6 +269,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:ios": [
"//pkg/proxy/ipvs:go_default_library",
@ -274,6 +277,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:linux": [
"//pkg/proxy/ipvs:go_default_library",
@ -281,6 +285,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:nacl": [
"//pkg/proxy/ipvs:go_default_library",
@ -288,6 +293,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:netbsd": [
"//pkg/proxy/ipvs:go_default_library",
@ -295,6 +301,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:openbsd": [
"//pkg/proxy/ipvs:go_default_library",
@ -302,6 +309,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:plan9": [
"//pkg/proxy/ipvs:go_default_library",
@ -309,6 +317,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"@io_bazel_rules_go//go/platform:solaris": [
"//pkg/proxy/ipvs:go_default_library",
@ -316,6 +325,7 @@ go_test(
"//pkg/util/iptables:go_default_library",
"//pkg/util/iptables/testing:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
],
"//conditions:default": [],
}),

53
cmd/kube-proxy/app/server_others.go
View File

@ -91,10 +91,24 @@ func newProxyServer(
return nil, fmt.Errorf("unable to register configz: %s", err)
}
hostname, err := utilnode.GetHostname(config.HostnameOverride)
if err != nil {
return nil, err
}
client, eventClient, err := createClients(config.ClientConnection, master)
if err != nil {
return nil, err
}
nodeIP := detectNodeIP(client, hostname, config.BindAddress)
protocol := utiliptables.ProtocolIPv4
if net.ParseIP(config.BindAddress).To4() == nil {
klog.V(0).Infof("IPv6 bind address (%s), assume IPv6 operation", config.BindAddress)
if utilsnet.IsIPv6(nodeIP) {
klog.V(0).Infof("kube-proxy node IP is an IPv6 address (%s), assume IPv6 operation", nodeIP.String())
protocol = utiliptables.ProtocolIPv6
} else {
klog.V(0).Infof("kube-proxy node IP is an IPv4 address (%s), assume IPv4 operation", nodeIP.String())
}
var iptInterface utiliptables.Interface
@ -131,16 +145,7 @@ func newProxyServer(
metrics.SetShowHidden()
}
client, eventClient, err := createClients(config.ClientConnection, master)
if err != nil {
return nil, err
}
// Create event recorder
hostname, err := utilnode.GetHostname(config.HostnameOverride)
if err != nil {
return nil, err
}
eventBroadcaster := record.NewBroadcaster()
recorder := eventBroadcaster.NewRecorder(proxyconfigscheme.Scheme, v1.EventSource{Component: "kube-proxy", Host: hostname})
@ -175,15 +180,6 @@ func newProxyServer(
klog.Infof("NodeInfo PodCIDR: %v, PodCIDRs: %v", nodeInfo.Spec.PodCIDR, nodeInfo.Spec.PodCIDRs)
}
nodeIP := net.ParseIP(config.BindAddress)
if nodeIP.IsUnspecified() {
nodeIP = utilnode.GetNodeIP(client, hostname)
if nodeIP == nil {
klog.V(0).Infof("can't determine this node's IP, assuming 127.0.0.1; if this is incorrect, please set the --bind-address flag")
nodeIP = net.ParseIP("127.0.0.1")
}
}
klog.V(2).Info("DetectLocalMode: '", string(detectLocalMode), "'")
if proxyMode == proxyModeIPTables {
@ -422,6 +418,23 @@ func waitForPodCIDR(client clientset.Interface, nodeName string) (*v1.Node, erro
return nil, fmt.Errorf("event object not of type node")
}
// detectNodeIP returns the nodeIP used by the proxier
// The order of precedence is:
// 1. config.bindAddress if bindAddress is not 0.0.0.0 or ::
// 2. the primary IP from the Node object, if set
// 3. if no IP is found it defaults to 127.0.0.1 and IPv4
func detectNodeIP(client clientset.Interface, hostname, bindAddress string) net.IP {
nodeIP := net.ParseIP(bindAddress)
if nodeIP.IsUnspecified() {
nodeIP = utilnode.GetNodeIP(client, hostname)
}
if nodeIP == nil {
klog.V(0).Infof("can't determine this node's IP, assuming 127.0.0.1; if this is incorrect, please set the --bind-address flag")
nodeIP = net.ParseIP("127.0.0.1")
}
return nodeIP
}
func getDetectLocalMode(config *proxyconfigapi.KubeProxyConfiguration) (proxyconfigapi.LocalMode, error) {
mode := config.DetectLocalMode
switch mode {

139
cmd/kube-proxy/app/server_others_test.go
View File

@ -20,10 +20,15 @@ package app
import (
"fmt"
"net"
"reflect"
"testing"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clientsetfake "k8s.io/client-go/kubernetes/fake"
proxyconfigapi "k8s.io/kubernetes/pkg/proxy/apis/config"
"k8s.io/kubernetes/pkg/proxy/ipvs"
proxyutiliptables "k8s.io/kubernetes/pkg/proxy/util/iptables"
@ -194,6 +199,111 @@ func Test_getDetectLocalMode(t *testing.T) {
}
}
func Test_detectNodeIP(t *testing.T) {
cases := []struct {
name string
nodeInfo *v1.Node
hostname string
bindAddress string
expectedIP net.IP
}{
{
name: "Bind address IPv4 unicast address and no Node object",
nodeInfo: makeNodeWithAddresses("", "", ""),
hostname: "fakeHost",
bindAddress: "10.0.0.1",
expectedIP: net.ParseIP("10.0.0.1"),
},
{
name: "Bind address IPv6 unicast address and no Node object",
nodeInfo: makeNodeWithAddresses("", "", ""),
hostname: "fakeHost",
bindAddress: "fd00:4321::2",
expectedIP: net.ParseIP("fd00:4321::2"),
},
{
name: "No Valid IP found",
nodeInfo: makeNodeWithAddresses("", "", ""),
hostname: "fakeHost",
bindAddress: "",
expectedIP: net.ParseIP("127.0.0.1"),
},
// Disabled because the GetNodeIP method has a backoff retry mechanism
// and the test takes more than 30 seconds
// ok k8s.io/kubernetes/cmd/kube-proxy/app 34.136s
// {
// name: "No Valid IP found and unspecified bind address",
// nodeInfo: makeNodeWithAddresses("", "", ""),
// hostname: "fakeHost",
// bindAddress: "0.0.0.0",
// expectedIP: net.ParseIP("127.0.0.1"),
// },
{
name: "Bind address 0.0.0.0 and node with IPv4 InternalIP set",
nodeInfo: makeNodeWithAddresses("fakeHost", "192.168.1.1", "90.90.90.90"),
hostname: "fakeHost",
bindAddress: "0.0.0.0",
expectedIP: net.ParseIP("192.168.1.1"),
},
{
name: "Bind address :: and node with IPv4 InternalIP set",
nodeInfo: makeNodeWithAddresses("fakeHost", "192.168.1.1", "90.90.90.90"),
hostname: "fakeHost",
bindAddress: "::",
expectedIP: net.ParseIP("192.168.1.1"),
},
{
name: "Bind address 0.0.0.0 and node with IPv6 InternalIP set",
nodeInfo: makeNodeWithAddresses("fakeHost", "fd00:1234::1", "2001:db8::2"),
hostname: "fakeHost",
bindAddress: "0.0.0.0",
expectedIP: net.ParseIP("fd00:1234::1"),
},
{
name: "Bind address :: and node with IPv6 InternalIP set",
nodeInfo: makeNodeWithAddresses("fakeHost", "fd00:1234::1", "2001:db8::2"),
hostname: "fakeHost",
bindAddress: "::",
expectedIP: net.ParseIP("fd00:1234::1"),
},
{
name: "Bind address 0.0.0.0 and node with only IPv4 ExternalIP set",
nodeInfo: makeNodeWithAddresses("fakeHost", "", "90.90.90.90"),
hostname: "fakeHost",
bindAddress: "0.0.0.0",
expectedIP: net.ParseIP("90.90.90.90"),
},
{
name: "Bind address :: and node with only IPv4 ExternalIP set",
nodeInfo: makeNodeWithAddresses("fakeHost", "", "90.90.90.90"),
hostname: "fakeHost",
bindAddress: "::",
expectedIP: net.ParseIP("90.90.90.90"),
},
{
name: "Bind address 0.0.0.0 and node with only IPv6 ExternalIP set",
nodeInfo: makeNodeWithAddresses("fakeHost", "", "2001:db8::2"),
hostname: "fakeHost",
bindAddress: "0.0.0.0",
expectedIP: net.ParseIP("2001:db8::2"),
},
{
name: "Bind address :: and node with only IPv6 ExternalIP set",
nodeInfo: makeNodeWithAddresses("fakeHost", "", "2001:db8::2"),
hostname: "fakeHost",
bindAddress: "::",
expectedIP: net.ParseIP("2001:db8::2"),
},
}
for _, c := range cases {
client := clientsetfake.NewSimpleClientset(c.nodeInfo)
ip := detectNodeIP(client, c.hostname, c.bindAddress)
if !ip.Equal(c.expectedIP) {
t.Errorf("Case[%s] Expected IP %q got %q", c.name, c.expectedIP, ip)
}
}
}
func Test_getLocalDetector(t *testing.T) {
cases := []struct {
mode proxyconfigapi.LocalMode
@ -474,6 +584,35 @@ func Test_getDualStackLocalDetectorTuple(t *testing.T) {
}
}
func makeNodeWithAddresses(name, internal, external string) *v1.Node {
if name == "" {
return &v1.Node{}
}
node := &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Name: name,
},
Status: v1.NodeStatus{
Addresses: []v1.NodeAddress{},
},
}
if internal != "" {
node.Status.Addresses = append(node.Status.Addresses,
v1.NodeAddress{Type: v1.NodeInternalIP, Address: internal},
)
}
if external != "" {
node.Status.Addresses = append(node.Status.Addresses,
v1.NodeAddress{Type: v1.NodeExternalIP, Address: external},
)
}
return node
}
func makeNodeWithPodCIDRs(cidrs ...string) *v1.Node {
if len(cidrs) == 0 {
return &v1.Node{}

27
cmd/kube-proxy/app/server_test.go
View File

@ -36,36 +36,9 @@ import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
componentbaseconfig "k8s.io/component-base/config"
"k8s.io/component-base/configz"
kubeproxyconfig "k8s.io/kubernetes/pkg/proxy/apis/config"
)
// This test verifies that NewProxyServer does not crash when CleanupAndExit is true.
func TestProxyServerWithCleanupAndExit(t *testing.T) {
// Each bind address below is a separate test case
bindAddresses := []string{
"0.0.0.0",
"::",
}
for _, addr := range bindAddresses {
options := NewOptions()
options.config = &kubeproxyconfig.KubeProxyConfiguration{
BindAddress: addr,
}
options.CleanupAndExit = true
proxyserver, err := NewProxyServer(options)
assert.Nil(t, err, "unexpected error in NewProxyServer, addr: %s", addr)
assert.NotNil(t, proxyserver, "nil proxy server obj, addr: %s", addr)
assert.NotNil(t, proxyserver.IptInterface, "nil iptables intf, addr: %s", addr)
// Clean up config for next test case
configz.Delete(kubeproxyconfig.GroupName)
}
}
func TestGetConntrackMax(t *testing.T) {
ncores := runtime.NumCPU()
testCases := []struct {