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proxy_test.go
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proxy_test.go
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// Copyright 2020 Antrea 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 e2e
import (
"context"
"encoding/hex"
"fmt"
"net"
"strings"
"testing"
"time"
"github.com/stretchr/testify/require"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"antrea.io/antrea/pkg/agent/config"
)
type expectTableFlows struct {
tableName string
flows []string
}
// TestProxy is the top-level test which contains all subtests for
// Proxy related test cases so they can share setup, teardown.
func TestProxy(t *testing.T) {
skipIfHasWindowsNodes(t)
skipIfProxyDisabled(t)
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
t.Run("testProxyServiceSessionAffinityCase", func(t *testing.T) {
testProxyServiceSessionAffinityCase(t, data)
})
t.Run("testProxyEndpointLifeCycleCase", func(t *testing.T) {
testProxyEndpointLifeCycleCase(t, data)
})
t.Run("testProxyServiceLifeCycleCase", func(t *testing.T) {
testProxyServiceLifeCycleCase(t, data)
})
}
func testProxyServiceSessionAffinityCase(t *testing.T, data *TestData) {
if len(clusterInfo.podV4NetworkCIDR) != 0 {
ipFamily := corev1.IPv4Protocol
testProxyServiceSessionAffinity(&ipFamily, []string{"169.254.169.1", "169.254.169.2"}, data, t)
}
if len(clusterInfo.podV6NetworkCIDR) != 0 {
ipFamily := corev1.IPv6Protocol
testProxyServiceSessionAffinity(&ipFamily, []string{"fd75::aabb:ccdd:ef00", "fd75::aabb:ccdd:ef01"}, data, t)
}
}
func skipIfKubeProxyEnabled(t *testing.T, data *TestData) {
_, err := data.clientset.AppsV1().DaemonSets(kubeNamespace).Get(context.TODO(), "kube-proxy", metav1.GetOptions{})
if err == nil {
t.Skipf("Skipping test because kube-proxy is running")
}
}
func probeFromNode(node string, url string, data *TestData) error {
_, _, _, err := data.RunCommandOnNode(node, fmt.Sprintf("curl --connect-timeout 1 --retry 5 --retry-connrefused %s", url))
return err
}
func probeHostnameFromNode(node string, baseUrl string, data *TestData) (string, error) {
url := fmt.Sprintf("%s/%s", baseUrl, "hostname")
_, hostname, _, err := data.RunCommandOnNode(node, fmt.Sprintf("curl --connect-timeout 1 --retry 5 --retry-connrefused %s", url))
return hostname, err
}
func probeClientIPFromNode(node string, baseUrl string, data *TestData) (string, error) {
url := fmt.Sprintf("%s/%s", baseUrl, "clientip")
_, hostPort, _, err := data.RunCommandOnNode(node, fmt.Sprintf("curl --connect-timeout 1 --retry 5 --retry-connrefused %s", url))
if err != nil {
return "", err
}
host, _, err := net.SplitHostPort(hostPort)
return host, err
}
func probeFromPod(data *TestData, pod, container string, url string) error {
var err error
if container == busyboxContainerName {
_, _, err = data.runWgetCommandOnBusyboxWithRetry(pod, data.testNamespace, url, 5)
} else {
_, _, err = data.RunCommandFromPod(data.testNamespace, pod, container, []string{"wget", "-O", "-", url, "-T", "5"})
}
return err
}
func probeHostnameFromPod(data *TestData, pod, container string, baseUrl string) (string, error) {
url := fmt.Sprintf("%s/%s", baseUrl, "hostname")
var err error
var hostname string
if container == busyboxContainerName {
hostname, _, err = data.runWgetCommandOnBusyboxWithRetry(pod, data.testNamespace, url, 5)
} else {
hostname, _, err = data.RunCommandFromPod(data.testNamespace, pod, container, []string{"wget", "-O", "-", url, "-T", "5"})
}
return hostname, err
}
func probeClientIPFromPod(data *TestData, pod, container string, baseUrl string) (string, error) {
url := fmt.Sprintf("%s/%s", baseUrl, "clientip")
var err error
var hostPort string
if container == busyboxContainerName {
hostPort, _, err = data.runWgetCommandOnBusyboxWithRetry(pod, data.testNamespace, url, 5)
} else {
hostPort, _, err = data.RunCommandFromPod(data.testNamespace, pod, container, []string{"wget", "-O", "-", url, "-T", "5"})
}
if err != nil {
return "", err
}
host, _, err := net.SplitHostPort(hostPort)
return host, err
}
func reverseStrs(strs []string) []string {
var res []string
for i := len(strs) - 1; i >= 0; i-- {
res = append(res, strs[i])
}
return res
}
func TestProxyLoadBalancerServiceIPv4(t *testing.T) {
skipIfNotIPv4Cluster(t)
testProxyLoadBalancerService(t, false)
}
func TestProxyLoadBalancerServiceIPv6(t *testing.T) {
skipIfNotIPv6Cluster(t)
testProxyLoadBalancerService(t, true)
}
func testProxyLoadBalancerService(t *testing.T, isIPv6 bool) {
skipIfProxyDisabled(t)
skipIfHasWindowsNodes(t)
skipIfNumNodesLessThan(t, 2)
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
skipIfProxyAllDisabled(t, data)
// Create a busybox Pod on every Node. The busybox Pod is used as a client.
nodes := []string{nodeName(0), nodeName(1)}
var busyboxes, busyboxIPs []string
for idx, node := range nodes {
podName, ips, _ := createAndWaitForPod(t, data, data.createBusyboxPodOnNode, fmt.Sprintf("busybox-%d-", idx), node, data.testNamespace, false)
busyboxes = append(busyboxes, podName)
if !isIPv6 {
busyboxIPs = append(busyboxIPs, ips.ipv4.String())
} else {
busyboxIPs = append(busyboxIPs, ips.ipv6.String())
}
}
clusterIngressIP := []string{"169.254.169.1"}
localIngressIP := []string{"169.254.169.2"}
ipProtocol := corev1.IPv4Protocol
if isIPv6 {
ipProtocol = corev1.IPv6Protocol
clusterIngressIP = []string{"fd75::aabb:ccdd:ef00"}
localIngressIP = []string{"fd75::aabb:ccdd:ef01"}
}
// Create two LoadBalancer Services. The externalTrafficPolicy of one Service is Cluster, and the externalTrafficPolicy
// of another one is Local.
_, err = data.createAgnhostLoadBalancerService("agnhost-cluster", true, false, clusterIngressIP, &ipProtocol)
require.NoError(t, err)
_, err = data.createAgnhostLoadBalancerService("agnhost-local", true, true, localIngressIP, &ipProtocol)
require.NoError(t, err)
port := "8080"
clusterUrl := net.JoinHostPort(clusterIngressIP[0], port)
localUrl := net.JoinHostPort(localIngressIP[0], port)
// Create agnhost Pods which are not on host network.
agnhosts := []string{"agnhost-0", "agnhost-1"}
for idx, node := range nodes {
createAgnhostPod(t, data, agnhosts[idx], node, false)
}
t.Run("Non-HostNetwork Endpoints", func(t *testing.T) {
loadBalancerTestCases(t, data, clusterUrl, localUrl, nodes, busyboxes, busyboxIPs, agnhosts)
})
// Delete agnhost Pods which are not on host network and create new agnhost Pods which are on host network.
hostAgnhosts := []string{"agnhost-host-0", "agnhost-host-1"}
for idx, node := range nodes {
require.NoError(t, data.DeletePod(data.testNamespace, agnhosts[idx]))
createAgnhostPod(t, data, hostAgnhosts[idx], node, true)
}
t.Run("HostNetwork Endpoints", func(t *testing.T) {
loadBalancerTestCases(t, data, clusterUrl, localUrl, nodes, busyboxes, busyboxIPs, nodes)
})
}
func loadBalancerTestCases(t *testing.T, data *TestData, clusterUrl, localUrl string, nodes, pods, podIPs, hostnames []string) {
t.Run("ExternalTrafficPolicy:Cluster/Client:Node", func(t *testing.T) {
testLoadBalancerClusterFromNode(t, data, nodes, clusterUrl)
})
t.Run("ExternalTrafficPolicy:Cluster/Client:Pod", func(t *testing.T) {
testLoadBalancerClusterFromPod(t, data, pods, clusterUrl)
})
t.Run("ExternalTrafficPolicy:Local/Client:Node", func(t *testing.T) {
testLoadBalancerLocalFromNode(t, data, nodes, localUrl, hostnames)
})
t.Run("ExternalTrafficPolicy:Local/Client:Pod", func(t *testing.T) {
testLoadBalancerLocalFromPod(t, data, pods, localUrl, podIPs, hostnames)
})
}
func testLoadBalancerClusterFromNode(t *testing.T, data *TestData, nodes []string, url string) {
skipIfKubeProxyEnabled(t, data)
for _, node := range nodes {
require.NoError(t, probeFromNode(node, url, data), "Service LoadBalancer whose externalTrafficPolicy is Cluster should be able to be connected from Node")
}
}
func testLoadBalancerClusterFromPod(t *testing.T, data *TestData, pods []string, url string) {
for _, pod := range pods {
require.NoError(t, probeFromPod(data, pod, busyboxContainerName, url), "Service LoadBalancer whose externalTrafficPolicy is Cluster should be able to be connected from Pod")
}
}
func testLoadBalancerLocalFromNode(t *testing.T, data *TestData, nodes []string, url string, expectedHostnames []string) {
skipIfKubeProxyEnabled(t, data)
for idx, node := range nodes {
hostname, err := probeHostnameFromNode(node, url, data)
require.NoError(t, err, "Service LoadBalancer whose externalTrafficPolicy is Local should be able to be connected from Node")
require.Equal(t, hostname, expectedHostnames[idx])
}
}
func testLoadBalancerLocalFromPod(t *testing.T, data *TestData, pods []string, url string, expectedClientIPs, expectedHostnames []string) {
errMsg := "Service NodePort whose externalTrafficPolicy is Local should be able to be connected from Pod"
for idx, pod := range pods {
hostname, err := probeHostnameFromPod(data, pod, busyboxContainerName, url)
require.NoError(t, err, errMsg)
require.Equal(t, hostname, expectedHostnames[idx])
clientIP, err := probeClientIPFromPod(data, pod, busyboxContainerName, url)
require.NoError(t, err, errMsg)
require.Equal(t, clientIP, expectedClientIPs[idx])
}
}
func TestProxyNodePortServiceIPv4(t *testing.T) {
skipIfNotIPv4Cluster(t)
testProxyNodePortService(t, false)
}
func TestProxyNodePortServiceIPv6(t *testing.T) {
skipIfNotIPv6Cluster(t)
testProxyNodePortService(t, true)
}
func testProxyNodePortService(t *testing.T, isIPv6 bool) {
skipIfHasWindowsNodes(t)
skipIfNumNodesLessThan(t, 2)
skipIfProxyDisabled(t)
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
skipIfProxyAllDisabled(t, data)
nodes := []string{nodeName(0), nodeName(1)}
nodeIPs := []string{controlPlaneNodeIPv4(), workerNodeIPv4(1)}
ipProtocol := corev1.IPv4Protocol
if isIPv6 {
nodeIPs = []string{controlPlaneNodeIPv6(), workerNodeIPv6(1)}
ipProtocol = corev1.IPv6Protocol
}
// Create a busybox Pod on every Node. The busybox Pod is used as a client.
var busyboxes, busyboxIPs []string
for idx, node := range nodes {
podName, ips, _ := createAndWaitForPod(t, data, data.createBusyboxPodOnNode, fmt.Sprintf("busybox-%d-", idx), node, data.testNamespace, false)
busyboxes = append(busyboxes, podName)
if !isIPv6 {
busyboxIPs = append(busyboxIPs, ips.ipv4.String())
} else {
busyboxIPs = append(busyboxIPs, ips.ipv6.String())
}
}
// Create two NodePort Services. The externalTrafficPolicy of one Service is Cluster, and the externalTrafficPolicy
// of another one is Local.
var portCluster, portLocal string
nodePortSvc, err := data.createAgnhostNodePortService("agnhost-cluster", true, false, &ipProtocol)
require.NoError(t, err)
for _, port := range nodePortSvc.Spec.Ports {
if port.NodePort != 0 {
portCluster = fmt.Sprint(port.NodePort)
break
}
}
require.NotEqual(t, "", portCluster, "NodePort port number should not be empty")
nodePortSvc, err = data.createAgnhostNodePortService("agnhost-local", true, true, &ipProtocol)
require.NoError(t, err)
for _, port := range nodePortSvc.Spec.Ports {
if port.NodePort != 0 {
portLocal = fmt.Sprint(port.NodePort)
break
}
}
require.NotEqual(t, "", portLocal, "NodePort port number should not be empty")
// Create agnhost Pods which are not on host network.
agnhosts := []string{"agnhost-0", "agnhost-1"}
for idx, node := range nodes {
createAgnhostPod(t, data, agnhosts[idx], node, false)
}
t.Run("Non-HostNetwork Endpoints", func(t *testing.T) {
nodePortTestCases(t, data, portCluster, portLocal, nodes, nodeIPs, busyboxes, busyboxIPs, agnhosts, false)
})
// Delete agnhost Pods which are not on host network and create new agnhost Pods which are on host network.
hostAgnhosts := []string{"agnhost-host-0", "agnhost-host-1"}
for idx, node := range nodes {
require.NoError(t, data.DeletePod(data.testNamespace, agnhosts[idx]))
createAgnhostPod(t, data, hostAgnhosts[idx], node, true)
}
t.Run("HostNetwork Endpoints", func(t *testing.T) {
nodePortTestCases(t, data, portCluster, portLocal, nodes, nodeIPs, busyboxes, busyboxIPs, nodes, true)
})
}
func nodePortTestCases(t *testing.T, data *TestData, portStrCluster, portStrLocal string, nodes, nodeIPs, pods, podIPs, hostnames []string, hostNetwork bool) {
var clusterUrls, localUrls []string
for _, nodeIP := range nodeIPs {
clusterUrls = append(clusterUrls, net.JoinHostPort(nodeIP, portStrCluster))
localUrls = append(localUrls, net.JoinHostPort(nodeIP, portStrLocal))
}
t.Run("ExternalTrafficPolicy:Cluster/Client:Remote", func(t *testing.T) {
testNodePortClusterFromRemote(t, data, nodes, reverseStrs(clusterUrls))
})
t.Run("ExternalTrafficPolicy:Cluster/Client:Node", func(t *testing.T) {
testNodePortClusterFromNode(t, data, nodes, clusterUrls)
})
t.Run("ExternalTrafficPolicy:Cluster/Client:Pod", func(t *testing.T) {
testNodePortClusterFromPod(t, data, pods, clusterUrls)
})
t.Run("ExternalTrafficPolicy:Local/Client:Remote", func(t *testing.T) {
if hostNetwork {
t.Skipf("Skip this test as Endpoint is on host network")
}
testNodePortLocalFromRemote(t, data, nodes, reverseStrs(localUrls), nodeIPs, reverseStrs(hostnames))
})
t.Run("ExternalTrafficPolicy:Local/Client:Node", func(t *testing.T) {
testNodePortLocalFromNode(t, data, nodes, localUrls, hostnames)
})
t.Run("ExternalTrafficPolicy:Local/Client:Pod", func(t *testing.T) {
testNodePortLocalFromPod(t, data, pods, localUrls, podIPs, hostnames)
})
}
func TestNodePortAndEgressWithTheSameBackendPod(t *testing.T) {
skipIfHasWindowsNodes(t)
skipIfNotIPv4Cluster(t)
skipIfNumNodesLessThan(t, 2)
skipIfAntreaIPAMTest(t)
skipIfProxyDisabled(t)
skipIfEgressDisabled(t)
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
skipIfProxyAllDisabled(t, data)
skipIfEncapModeIsNot(t, data, config.TrafficEncapModeEncap) // Egress works for encap mode only.
// Create a NodePort Service.
nodePortIP := controlPlaneNodeIPv4()
ipProtocol := corev1.IPv4Protocol
var portStr string
nodePortSvc, err := data.createNginxNodePortService("test-nodeport-svc", true, false, &ipProtocol)
require.NoError(t, err)
for _, port := range nodePortSvc.Spec.Ports {
if port.NodePort != 0 {
portStr = fmt.Sprint(port.NodePort)
break
}
}
testNodePortURL := net.JoinHostPort(nodePortIP, portStr)
// Create an Egress whose external IP is on worker Node.
egressNodeIP := workerNodeIPv4(1)
egress := data.createEgress(t, "test-egress", nil, map[string]string{"app": "nginx"}, "", egressNodeIP)
defer data.crdClient.CrdV1alpha2().Egresses().Delete(context.TODO(), egress.Name, metav1.DeleteOptions{})
// Create the backend Pod on control plane Node.
backendPodName := "test-nodeport-egress-backend-pod"
require.NoError(t, data.createNginxPodOnNode(backendPodName, data.testNamespace, controlPlaneNodeName(), false))
defer deletePodWrapper(t, data, data.testNamespace, backendPodName)
if err := data.podWaitForRunning(defaultTimeout, backendPodName, data.testNamespace); err != nil {
t.Fatalf("Error when waiting for Pod '%s' to be in the Running state", backendPodName)
}
// Create another netns to fake an external network on the host network Pod.
testPod := "test-client"
testNetns := "test-ns"
cmd := fmt.Sprintf(`ip netns add %[1]s && \
ip link add dev %[1]s-a type veth peer name %[1]s-b && \
ip link set dev %[1]s-a netns %[1]s && \
ip addr add %[3]s/%[4]d dev %[1]s-b && \
ip link set dev %[1]s-b up && \
ip netns exec %[1]s ip addr add %[2]s/%[4]d dev %[1]s-a && \
ip netns exec %[1]s ip link set dev %[1]s-a up && \
ip netns exec %[1]s ip route replace default via %[3]s && \
sleep 3600
`, testNetns, "1.1.1.1", "1.1.1.254", 24)
if err := NewPodBuilder(testPod, data.testNamespace, agnhostImage).OnNode(controlPlaneNodeName()).WithCommand([]string{"sh", "-c", cmd}).InHostNetwork().Privileged().Create(data); err != nil {
t.Fatalf("Failed to create client Pod: %v", err)
}
defer deletePodWrapper(t, data, data.testNamespace, testPod)
if err := data.podWaitForRunning(defaultTimeout, testPod, data.testNamespace); err != nil {
t.Fatalf("Error when waiting for Pod '%s' to be in the Running state", testPod)
}
// Connect to NodePort on control plane Node in the fake external network.
cmd = fmt.Sprintf("ip netns exec %s curl --connect-timeout 1 --retry 5 --retry-connrefused %s", testNetns, testNodePortURL)
_, _, err = data.RunCommandFromPod(data.testNamespace, testPod, agnhostContainerName, []string{"sh", "-c", cmd})
require.NoError(t, err, "Service NodePort should be able to be connected from external network when Egress is enabled")
}
func createAgnhostPod(t *testing.T, data *TestData, podName string, node string, hostNetwork bool) {
args := []string{"netexec", "--http-port=8080"}
ports := []corev1.ContainerPort{
{
Name: "http",
ContainerPort: 8080,
Protocol: corev1.ProtocolTCP,
},
}
require.NoError(t, NewPodBuilder(podName, data.testNamespace, agnhostImage).OnNode(node).WithArgs(args).WithPorts(ports).WithHostNetwork(hostNetwork).Create(data))
_, err := data.podWaitForIPs(defaultTimeout, podName, data.testNamespace)
require.NoError(t, err)
require.NoError(t, data.podWaitForRunning(defaultTimeout, podName, data.testNamespace))
}
func testNodePortClusterFromRemote(t *testing.T, data *TestData, nodes, urls []string) {
skipIfKubeProxyEnabled(t, data)
for idx, node := range nodes {
require.NoError(t, probeFromNode(node, urls[idx], data), "Service NodePort whose externalTrafficPolicy is Cluster should be able to be connected from remote Node")
}
}
func testNodePortClusterFromNode(t *testing.T, data *TestData, nodes, urls []string) {
skipIfKubeProxyEnabled(t, data)
for idx, node := range nodes {
require.NoError(t, probeFromNode(node, urls[idx], data), "Service NodePort whose externalTrafficPolicy is Cluster should be able to be connected from Node")
}
}
func testNodePortClusterFromPod(t *testing.T, data *TestData, pods, urls []string) {
for _, url := range urls {
for _, pod := range pods {
require.NoError(t, probeFromPod(data, pod, busyboxContainerName, url), "Service NodePort whose externalTrafficPolicy is Cluster should be able to be connected from Pod")
}
}
}
func testNodePortLocalFromRemote(t *testing.T, data *TestData, nodes, urls, expectedClientIPs, expectedHostnames []string) {
skipIfKubeProxyEnabled(t, data)
errMsg := "Service NodePort whose externalTrafficPolicy is Local should be able to be connected from remote Node"
for idx, node := range nodes {
hostname, err := probeHostnameFromNode(node, urls[idx], data)
require.NoError(t, err, errMsg)
require.Equal(t, expectedHostnames[idx], hostname)
clientIP, err := probeClientIPFromNode(node, urls[idx], data)
require.NoError(t, err, errMsg)
require.Equal(t, expectedClientIPs[idx], clientIP)
}
}
func testNodePortLocalFromNode(t *testing.T, data *TestData, nodes, urls, expectedHostnames []string) {
skipIfKubeProxyEnabled(t, data)
for idx, node := range nodes {
hostname, err := probeHostnameFromNode(node, urls[idx], data)
require.NoError(t, err, "Service NodePort whose externalTrafficPolicy is Local should be able to be connected rom Node")
require.Equal(t, expectedHostnames[idx], hostname)
}
}
func testNodePortLocalFromPod(t *testing.T, data *TestData, pods, urls, expectedClientIPs, expectedHostnames []string) {
errMsg := "There should be no errors when accessing to Service NodePort whose externalTrafficPolicy is Local from Pod"
for idx, pod := range pods {
hostname, err := probeHostnameFromPod(data, pod, busyboxContainerName, urls[idx])
require.NoError(t, err, errMsg)
require.Equal(t, expectedHostnames[idx], hostname)
clientIP, err := probeClientIPFromPod(data, pod, busyboxContainerName, urls[idx])
require.NoError(t, err, errMsg)
require.Equal(t, expectedClientIPs[idx], clientIP)
}
}
func TestProxyServiceSessionAffinity(t *testing.T) {
skipIfHasWindowsNodes(t)
skipIfProxyDisabled(t)
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
if len(clusterInfo.podV4NetworkCIDR) != 0 {
ipFamily := corev1.IPv4Protocol
testProxyServiceSessionAffinity(&ipFamily, []string{"169.254.169.1", "169.254.169.2"}, data, t)
}
if len(clusterInfo.podV6NetworkCIDR) != 0 {
ipFamily := corev1.IPv6Protocol
testProxyServiceSessionAffinity(&ipFamily, []string{"fd75::aabb:ccdd:ef00", "fd75::aabb:ccdd:ef01"}, data, t)
}
}
func TestProxyExternalTrafficPolicyIPv4(t *testing.T) {
skipIfNotIPv4Cluster(t)
testProxyExternalTrafficPolicy(t, false)
}
func TestProxyExternalTrafficPolicyIPv6(t *testing.T) {
skipIfNotIPv6Cluster(t)
testProxyExternalTrafficPolicy(t, true)
}
func testProxyExternalTrafficPolicy(t *testing.T, isIPv6 bool) {
skipIfHasWindowsNodes(t)
skipIfNumNodesLessThan(t, 2)
skipIfProxyDisabled(t)
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
skipIfProxyAllDisabled(t, data)
svcName := fmt.Sprintf("nodeport-external-traffic-policy-test-ipv6-%v", isIPv6)
nodes := []string{nodeName(0), nodeName(1)}
nodeIPs := []string{controlPlaneNodeIPv4(), workerNodeIPv4(1)}
ipProtocol := corev1.IPv4Protocol
if isIPv6 {
nodeIPs = []string{controlPlaneNodeIPv6(), workerNodeIPv6(1)}
ipProtocol = corev1.IPv6Protocol
}
// Create agnhost Pods which are not on host network.
var podNames []string
for idx, node := range nodes {
podName := fmt.Sprintf("agnhost-%d-ipv6-%v", idx, isIPv6)
createAgnhostPod(t, data, podName, node, false)
podNames = append(podNames, podName)
}
// Create a NodePort Service whose externalTrafficPolicy is Cluster and backend Pods are created above.
var portStr string
nodePortSvc, err := data.createAgnhostNodePortService(svcName, false, false, &ipProtocol)
require.NoError(t, err)
for _, port := range nodePortSvc.Spec.Ports {
if port.NodePort != 0 {
portStr = fmt.Sprint(port.NodePort)
break
}
}
require.NotEqual(t, "", portStr, "NodePort port number should not be empty")
// Get test NodePort URLs.
var urls []string
for _, nodeIP := range nodeIPs {
urls = append(urls, net.JoinHostPort(nodeIP, portStr))
}
// Hold on to make sure that the Service is realized, then test the NodePort on each Node.
time.Sleep(2 * time.Second)
testNodePortClusterFromRemote(t, data, nodes, reverseStrs(urls))
// Update the NodePort Service's externalTrafficPolicy from Cluster to Local.
_, err = data.updateServiceExternalTrafficPolicy(svcName, true)
require.NoError(t, err)
// Hold on to make sure that the update of Service is realized, then test the NodePort on each Node.
time.Sleep(2 * time.Second)
testNodePortLocalFromRemote(t, data, nodes, reverseStrs(urls), nodeIPs, reverseStrs(podNames))
}
func testProxyServiceSessionAffinity(ipFamily *corev1.IPFamily, ingressIPs []string, data *TestData, t *testing.T) {
nodeName := nodeName(1)
nginx := randName("nginx-")
require.NoError(t, data.createNginxPodOnNode(nginx, data.testNamespace, nodeName, false))
nginxIP, err := data.podWaitForIPs(defaultTimeout, nginx, data.testNamespace)
defer data.deletePodAndWait(defaultTimeout, nginx, data.testNamespace)
require.NoError(t, err)
require.NoError(t, data.podWaitForRunning(defaultTimeout, nginx, data.testNamespace))
svc, err := data.createNginxClusterIPService(nginx, data.testNamespace, true, ipFamily)
defer data.deleteServiceAndWait(defaultTimeout, nginx, data.testNamespace)
require.NoError(t, err)
_, err = data.createNginxLoadBalancerService(true, ingressIPs, ipFamily)
defer data.deleteServiceAndWait(defaultTimeout, nginxLBService, data.testNamespace)
require.NoError(t, err)
busyboxPod := randName("busybox-")
require.NoError(t, data.createBusyboxPodOnNode(busyboxPod, data.testNamespace, nodeName, false))
defer data.deletePodAndWait(defaultTimeout, busyboxPod, data.testNamespace)
require.NoError(t, data.podWaitForRunning(defaultTimeout, busyboxPod, data.testNamespace))
stdout, stderr, err := data.runWgetCommandOnBusyboxWithRetry(busyboxPod, data.testNamespace, svc.Spec.ClusterIP, 5)
require.NoError(t, err, fmt.Sprintf("ipFamily: %v\nstdout: %s\nstderr: %s\n", *ipFamily, stdout, stderr))
for _, ingressIP := range ingressIPs {
stdout, stderr, err := data.runWgetCommandOnBusyboxWithRetry(busyboxPod, data.testNamespace, ingressIP, 5)
require.NoError(t, err, fmt.Sprintf("ipFamily: %v\nstdout: %s\nstderr: %s\n", *ipFamily, stdout, stderr))
}
// Hold on to make sure that the Service is realized.
time.Sleep(3 * time.Second)
agentName, err := data.getAntreaPodOnNode(nodeName)
require.NoError(t, err)
tableSessionAffinityName := "SessionAffinity"
tableSessionAffinityOutput, _, err := data.RunCommandFromPod(metav1.NamespaceSystem, agentName, "antrea-agent", []string{"ovs-ofctl", "dump-flows", defaultBridgeName, fmt.Sprintf("table=%s", tableSessionAffinityName)})
require.NoError(t, err)
if *ipFamily == corev1.IPv4Protocol {
require.Contains(t, tableSessionAffinityOutput, fmt.Sprintf("nw_dst=%s,tp_dst=80", svc.Spec.ClusterIP))
require.Contains(t, tableSessionAffinityOutput, fmt.Sprintf("load:0x%s->NXM_NX_REG3[]", strings.TrimLeft(hex.EncodeToString(nginxIP.ipv4.To4()), "0")))
for _, ingressIP := range ingressIPs {
require.Contains(t, tableSessionAffinityOutput, fmt.Sprintf("nw_dst=%s,tp_dst=80", ingressIP))
}
} else {
require.Contains(t, tableSessionAffinityOutput, fmt.Sprintf("ipv6_dst=%s,tp_dst=80", svc.Spec.ClusterIP))
require.Contains(t, tableSessionAffinityOutput, fmt.Sprintf("load:0x%s->NXM_NX_XXREG3[0..63]", strings.TrimLeft(hex.EncodeToString([]byte(*nginxIP.ipv6)[8:16]), "0")))
require.Contains(t, tableSessionAffinityOutput, fmt.Sprintf("load:0x%s->NXM_NX_XXREG3[64..127]", strings.TrimLeft(hex.EncodeToString([]byte(*nginxIP.ipv6)[0:8]), "0")))
for _, ingressIP := range ingressIPs {
require.Contains(t, tableSessionAffinityOutput, fmt.Sprintf("ipv6_dst=%s,tp_dst=80", ingressIP))
}
}
}
func TestProxyHairpinIPv4(t *testing.T) {
skipIfProxyDisabled(t)
skipIfHasWindowsNodes(t)
skipIfNotIPv4Cluster(t)
testProxyHairpin(t, false)
}
func TestProxyHairpinIPv6(t *testing.T) {
skipIfProxyDisabled(t)
skipIfHasWindowsNodes(t)
skipIfNotIPv6Cluster(t)
testProxyHairpin(t, true)
}
func testProxyHairpin(t *testing.T, isIPv6 bool) {
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
node := nodeName(1)
workerNodeIP := workerNodeIPv4(1)
controllerNodeIP := controlPlaneNodeIPv4()
ipProtocol := corev1.IPv4Protocol
lbClusterIngressIP := []string{"192.168.240.1"}
lbLocalIngressIP := []string{"192.168.240.2"}
if isIPv6 {
workerNodeIP = workerNodeIPv6(1)
controllerNodeIP = controlPlaneNodeIPv6()
ipProtocol = corev1.IPv6Protocol
lbClusterIngressIP = []string{"fd75::aabb:ccdd:ef00"}
lbLocalIngressIP = []string{"fd75::aabb:ccdd:ef01"}
}
// Create a ClusterIP Service.
serviceClusterIP := fmt.Sprintf("clusterip-%v", isIPv6)
clusterIPSvc, err := data.createAgnhostClusterIPService(serviceClusterIP, true, &ipProtocol)
defer data.deleteServiceAndWait(defaultTimeout, serviceClusterIP, data.testNamespace)
require.NoError(t, err)
// Create two NodePort Services. The externalTrafficPolicy of one Service is Cluster, and the externalTrafficPolicy
// of another one is Local.
var nodePortCluster, nodePortLocal string
serviceNodePortCluster := fmt.Sprintf("nodeport-cluster-%v", isIPv6)
serviceNodePortLocal := fmt.Sprintf("nodeport-local-%v", isIPv6)
nodePortSvc, err := data.createAgnhostNodePortService(serviceNodePortCluster, true, false, &ipProtocol)
defer data.deleteServiceAndWait(defaultTimeout, serviceNodePortCluster, data.testNamespace)
require.NoError(t, err)
for _, port := range nodePortSvc.Spec.Ports {
if port.NodePort != 0 {
nodePortCluster = fmt.Sprint(port.NodePort)
break
}
}
require.NotEqual(t, "", nodePortCluster, "NodePort port number should not be empty")
nodePortSvc, err = data.createAgnhostNodePortService(serviceNodePortLocal, true, true, &ipProtocol)
require.NoError(t, err)
defer data.deleteServiceAndWait(defaultTimeout, serviceNodePortLocal, data.testNamespace)
for _, port := range nodePortSvc.Spec.Ports {
if port.NodePort != 0 {
nodePortLocal = fmt.Sprint(port.NodePort)
break
}
}
require.NotEqual(t, "", nodePortLocal, "NodePort port number should not be empty")
// Create two LoadBalancer Services. The externalTrafficPolicy of one Service is Cluster, and the externalTrafficPolicy
// of another one is Local.
serviceLBCluster := fmt.Sprintf("lb-cluster-%v", isIPv6)
serviceLBLocal := fmt.Sprintf("lb-local-%v", isIPv6)
_, err = data.createAgnhostLoadBalancerService(serviceLBCluster, true, false, lbClusterIngressIP, &ipProtocol)
require.NoError(t, err)
_, err = data.createAgnhostLoadBalancerService(serviceLBLocal, true, true, lbLocalIngressIP, &ipProtocol)
require.NoError(t, err)
// These are test urls.
port := "8080"
clusterIPUrl := net.JoinHostPort(clusterIPSvc.Spec.ClusterIP, port)
workerNodePortClusterUrl := net.JoinHostPort(workerNodeIP, nodePortCluster)
workerNodePortLocalUrl := net.JoinHostPort(workerNodeIP, nodePortLocal)
controllerNodePortClusterUrl := net.JoinHostPort(controllerNodeIP, nodePortCluster)
lbClusterUrl := net.JoinHostPort(lbClusterIngressIP[0], port)
lbLocalUrl := net.JoinHostPort(lbLocalIngressIP[0], port)
// These are expected client IP.
expectedGatewayIP, _ := nodeGatewayIPs(1)
expectedVirtualIP := config.VirtualServiceIPv4.String()
expectedControllerIP := controllerNodeIP
if isIPv6 {
_, expectedGatewayIP = nodeGatewayIPs(1)
expectedVirtualIP = config.VirtualServiceIPv6.String()
}
agnhost := fmt.Sprintf("agnhost-%v", isIPv6)
createAgnhostPod(t, data, agnhost, node, false)
t.Run("Non-HostNetwork Endpoints", func(t *testing.T) {
testProxyIntraNodeHairpinCases(data, t, expectedGatewayIP, agnhost, clusterIPUrl, workerNodePortClusterUrl, workerNodePortLocalUrl, lbClusterUrl, lbLocalUrl)
testProxyInterNodeHairpinCases(data, t, false, expectedControllerIP, nodeName(0), clusterIPUrl, controllerNodePortClusterUrl, lbClusterUrl)
})
require.NoError(t, data.DeletePod(data.testNamespace, agnhost))
agnhostHost := fmt.Sprintf("agnhost-host-%v", isIPv6)
createAgnhostPod(t, data, agnhostHost, node, true)
t.Run("HostNetwork Endpoints", func(t *testing.T) {
skipIfProxyAllDisabled(t, data)
testProxyIntraNodeHairpinCases(data, t, expectedVirtualIP, agnhostHost, clusterIPUrl, workerNodePortClusterUrl, workerNodePortLocalUrl, lbClusterUrl, lbLocalUrl)
testProxyInterNodeHairpinCases(data, t, true, expectedControllerIP, nodeName(0), clusterIPUrl, controllerNodePortClusterUrl, lbClusterUrl)
})
}
// If a Pod is not on host network, when it accesses a ClusterIP/NodePort/LoadBalancer Service whose Endpoint is on itself,
// that means a hairpin connection. Antrea gateway IP is used to SNAT the connection. The IP changes of the connection are:
// - Pod : Pod IP -> Service IP
// - OVS DNAT: Pod IP -> Pod IP
// - OVS SNAT: Antrea gateway IP -> Pod IP
// - Pod : Antrea gateway IP -> Pod IP
//
// If a Pod is on host network, when it accesses a ClusterIP/NodePort/LoadBalancer Service whose Endpoint is on itself
// (this is equivalent to that a Node accesses a Cluster/NodePort/LoadBalancer whose Endpoint is host network and the
// Endpoint is on this Node), that means a hairpin connection. A virtual IP is used to SNAT the connection to ensure
// that the packet can be routed via Antrea gateway. The IP changes of the connection are:
// - Antrea gateway: Antrea gateway IP -> Service IP
// - OVS DNAT: Antrea gateway IP -> Node IP
// - OVS SNAT: virtual IP -> Node IP
// - Antrea gateway: virtual IP -> Node IP
func testProxyIntraNodeHairpinCases(data *TestData, t *testing.T, expectedClientIP, pod, clusterIPUrl, nodePortClusterUrl, nodePortLocalUrl, lbClusterUrl, lbLocalUrl string) {
t.Run("IntraNode/ClusterIP", func(t *testing.T) {
clientIP, err := probeClientIPFromPod(data, pod, agnhostContainerName, clusterIPUrl)
require.NoError(t, err, "ClusterIP hairpin should be able to be connected")
require.Equal(t, expectedClientIP, clientIP)
})
t.Run("IntraNode/NodePort/ExternalTrafficPolicy:Cluster", func(t *testing.T) {
skipIfProxyAllDisabled(t, data)
clientIP, err := probeClientIPFromPod(data, pod, agnhostContainerName, nodePortClusterUrl)
require.NoError(t, err, "NodePort whose externalTrafficPolicy is Cluster hairpin should be able to be connected")
require.Equal(t, expectedClientIP, clientIP)
})
t.Run("IntraNode/NodePort/ExternalTrafficPolicy:Local", func(t *testing.T) {
skipIfProxyAllDisabled(t, data)
clientIP, err := probeClientIPFromPod(data, pod, agnhostContainerName, nodePortLocalUrl)
require.NoError(t, err, "NodePort whose externalTrafficPolicy is Local hairpin should be able to be connected")
require.Equal(t, expectedClientIP, clientIP)
})
t.Run("IntraNode/LoadBalancer/ExternalTrafficPolicy:Cluster", func(t *testing.T) {
clientIP, err := probeClientIPFromPod(data, pod, agnhostContainerName, lbClusterUrl)
require.NoError(t, err, "LoadBalancer whose externalTrafficPolicy is Cluster hairpin should be able to be connected")
require.Equal(t, expectedClientIP, clientIP)
})
t.Run("IntraNode/LoadBalancer/ExternalTrafficPolicy:Local", func(t *testing.T) {
clientIP, err := probeClientIPFromPod(data, pod, agnhostContainerName, lbLocalUrl)
require.NoError(t, err, "LoadBalancer whose externalTrafficPolicy is Local hairpin should be able to be connected")
require.Equal(t, expectedClientIP, clientIP)
})
}
// If client is Node A, when it accesses a ClusterIP/NodePort/LoadBalancer Service whose Endpoint is on Node B, below
// cases are hairpin (assumed that feature AntreaIPAM is not enabled):
// - Traffic mode: encap, Endpoint network: host network, OS: Linux/Windows
// - Traffic mode: noEncap, Endpoint network: not host network, OS: Linux (packets are routed via uplink interface)
// - Traffic mode: noEncap, Endpoint network: host network, OS: Linux/Windows
// The IP changes of the hairpin connections are:
// - Node A Antrea gateway: Antrea gateway IP -> Service IP
// - OVS DNAT: Antrea gateway IP -> Endpoint IP
// - OVS SNAT: virtual IP -> Endpoint IP
// - Node A Antrea gateway: virtual IP -> Endpoint IP
// - Node A output: Node A IP -> Endpoint IP (another SNAT for virtual IP, otherwise reply packets can't be routed back).
// - Node B: Node A IP -> Endpoint IP
func testProxyInterNodeHairpinCases(data *TestData, t *testing.T, hostNetwork bool, expectedClientIP, node, clusterIPUrl, nodePortClusterUrl, lbClusterUrl string) {
skipIfAntreaIPAMTest(t)
currentEncapMode, err := data.GetEncapMode()
if err != nil {
t.Fatalf("Failed to get encap mode: %v", err)
}
if !hostNetwork {
if testOptions.providerName == "kind" && (currentEncapMode == config.TrafficEncapModeEncap || currentEncapMode == config.TrafficEncapModeHybrid) {
t.Skipf("Skipping test because inter-Node Pod traffic is encapsulated when testbed is Kind and traffic mode is encap/hybrid")
} else if currentEncapMode == config.TrafficEncapModeEncap {
t.Skipf("Skipping test because inter-Node Pod traffic is encapsulated when testbed is not Kind and traffic mode encap")
}
}
t.Run("InterNode/ClusterIP", func(t *testing.T) {
clientIP, err := probeClientIPFromNode(node, clusterIPUrl, data)
require.NoError(t, err, "ClusterIP hairpin should be able to be connected")
require.Equal(t, expectedClientIP, clientIP)
})
t.Run("InterNode/NodePort/ExternalTrafficPolicy:Cluster", func(t *testing.T) {
skipIfProxyAllDisabled(t, data)
if !hostNetwork && currentEncapMode == config.TrafficEncapModeNoEncap {
skipIfHasWindowsNodes(t)
}
clientIP, err := probeClientIPFromNode(node, nodePortClusterUrl, data)
require.NoError(t, err, "NodePort whose externalTrafficPolicy is Cluster hairpin should be able to be connected")
require.Equal(t, expectedClientIP, clientIP)
})
t.Run("InterNode/LoadBalancer/ExternalTrafficPolicy:Cluster", func(t *testing.T) {
skipIfProxyAllDisabled(t, data)
if !hostNetwork && currentEncapMode == config.TrafficEncapModeNoEncap {
skipIfHasWindowsNodes(t)
}
clientIP, err := probeClientIPFromNode(node, lbClusterUrl, data)
require.NoError(t, err, "LoadBalancer whose externalTrafficPolicy is Cluster hairpin should be able to be connected")
require.Equal(t, expectedClientIP, clientIP)
})
}
func testProxyEndpointLifeCycleCase(t *testing.T, data *TestData) {
if len(clusterInfo.podV4NetworkCIDR) != 0 {
ipFamily := corev1.IPv4Protocol
testProxyEndpointLifeCycle(&ipFamily, data, t)
}
if len(clusterInfo.podV6NetworkCIDR) != 0 {
ipFamily := corev1.IPv6Protocol
testProxyEndpointLifeCycle(&ipFamily, data, t)
}
}
func TestProxyEndpointLifeCycle(t *testing.T) {
skipIfHasWindowsNodes(t)
skipIfProxyDisabled(t)
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
if len(clusterInfo.podV4NetworkCIDR) != 0 {
ipFamily := corev1.IPv4Protocol
testProxyEndpointLifeCycle(&ipFamily, data, t)
}
if len(clusterInfo.podV6NetworkCIDR) != 0 {
ipFamily := corev1.IPv6Protocol
testProxyEndpointLifeCycle(&ipFamily, data, t)
}
}
func testProxyEndpointLifeCycle(ipFamily *corev1.IPFamily, data *TestData, t *testing.T) {
nodeName := nodeName(1)
nginx := randName("nginx-")
require.NoError(t, data.createNginxPodOnNode(nginx, data.testNamespace, nodeName, false))
nginxIPs, err := data.podWaitForIPs(defaultTimeout, nginx, data.testNamespace)
require.NoError(t, err)
_, err = data.createNginxClusterIPService(nginx, data.testNamespace, false, ipFamily)
defer data.deleteServiceAndWait(defaultTimeout, nginx, data.testNamespace)
require.NoError(t, err)
// Hold on to make sure that the Service is realized.
time.Sleep(3 * time.Second)
agentName, err := data.getAntreaPodOnNode(nodeName)
require.NoError(t, err)
var nginxIP string
if *ipFamily == corev1.IPv6Protocol {
nginxIP = nginxIPs.ipv6.String()
} else {
nginxIP = nginxIPs.ipv4.String()
}
keywords := make(map[string]string)
keywords["EndpointDNAT"] = fmt.Sprintf("nat(dst=%s)", net.JoinHostPort(nginxIP, "80")) // endpointNATTable
var groupKeywords []string
if *ipFamily == corev1.IPv6Protocol {
groupKeywords = append(groupKeywords,
fmt.Sprintf("load:0x%s->NXM_NX_XXREG3[0..63],load:0x%s->NXM_NX_XXREG3[64..127]", strings.TrimLeft(hex.EncodeToString((*nginxIPs.ipv6)[8:16]), "0"), strings.TrimLeft(hex.EncodeToString((*nginxIPs.ipv6)[:8]), "0")))
} else {
groupKeywords = append(groupKeywords, fmt.Sprintf("0x%s->NXM_NX_REG3[]", strings.TrimLeft(hex.EncodeToString(nginxIPs.ipv4.To4()), "0")))
}
for tableName, keyword := range keywords {
tableOutput, _, err := data.RunCommandFromPod(metav1.NamespaceSystem, agentName, "antrea-agent", []string{"ovs-ofctl", "dump-flows", defaultBridgeName, fmt.Sprintf("table=%s", tableName)})
require.NoError(t, err)
require.Contains(t, tableOutput, keyword)
}
groupOutput, _, err := data.RunCommandFromPod(metav1.NamespaceSystem, agentName, "antrea-agent", []string{"ovs-ofctl", "dump-groups", defaultBridgeName})
require.NoError(t, err)
for _, k := range groupKeywords {
require.Contains(t, groupOutput, k)
}
require.NoError(t, data.deletePodAndWait(defaultTimeout, nginx, data.testNamespace))
// Wait for one second to make sure the pipeline to be updated.
time.Sleep(time.Second)
for tableName, keyword := range keywords {
tableOutput, _, err := data.RunCommandFromPod(metav1.NamespaceSystem, agentName, "antrea-agent", []string{"ovs-ofctl", "dump-flows", defaultBridgeName, fmt.Sprintf("table=%s", tableName)})
require.NoError(t, err)
require.NotContains(t, tableOutput, keyword)
}
groupOutput, _, err = data.RunCommandFromPod(metav1.NamespaceSystem, agentName, "antrea-agent", []string{"ovs-ofctl", "dump-groups", defaultBridgeName})
require.NoError(t, err)
for _, k := range groupKeywords {
require.NotContains(t, groupOutput, k)
}
}
func testProxyServiceLifeCycleCase(t *testing.T, data *TestData) {
if len(clusterInfo.podV4NetworkCIDR) != 0 {
ipFamily := corev1.IPv4Protocol
testProxyServiceLifeCycle(&ipFamily, []string{"169.254.169.1", "169.254.169.2"}, data, t)
}
if len(clusterInfo.podV6NetworkCIDR) != 0 {
ipFamily := corev1.IPv6Protocol
testProxyServiceLifeCycle(&ipFamily, []string{"fd75::aabb:ccdd:ef00", "fd75::aabb:ccdd:ef01"}, data, t)
}
}
func TestProxyServiceLifeCycle(t *testing.T) {
skipIfHasWindowsNodes(t)
skipIfProxyDisabled(t)
data, err := setupTest(t)
if err != nil {
t.Fatalf("Error when setting up test: %v", err)
}
defer teardownTest(t, data)
if len(clusterInfo.podV4NetworkCIDR) != 0 {
ipFamily := corev1.IPv4Protocol
testProxyServiceLifeCycle(&ipFamily, []string{"169.254.169.1", "169.254.169.2"}, data, t)
}
if len(clusterInfo.podV6NetworkCIDR) != 0 {
ipFamily := corev1.IPv6Protocol
testProxyServiceLifeCycle(&ipFamily, []string{"fd75::aabb:ccdd:ef00", "fd75::aabb:ccdd:ef01"}, data, t)
}
}