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DatapathConfiguration.go
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DatapathConfiguration.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright 2017-2021 Authors of Cilium
package k8sTest
import (
"context"
"fmt"
"net"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"sync"
"time"
"github.com/cilium/cilium/test/config"
. "github.com/cilium/cilium/test/ginkgo-ext"
"github.com/cilium/cilium/test/helpers"
. "github.com/onsi/gomega"
)
var _ = Describe("K8sDatapathConfig", func() {
var (
kubectl *helpers.Kubectl
monitorLog = "monitor-aggregation.log"
)
BeforeAll(func() {
kubectl = helpers.CreateKubectl(helpers.K8s1VMName(), logger)
deploymentManager.SetKubectl(kubectl)
})
AfterEach(func() {
deploymentManager.DeleteAll()
ExpectAllPodsTerminated(kubectl)
})
AfterFailed(func() {
kubectl.CiliumReport("cilium status", "cilium endpoint list")
})
AfterAll(func() {
kubectl.ScaleDownDNS()
ExpectAllPodsTerminated(kubectl)
deploymentManager.DeleteCilium()
kubectl.ScaleUpDNS()
kubectl.CloseSSHClient()
})
JustAfterEach(func() {
kubectl.ValidateNoErrorsInLogs(CurrentGinkgoTestDescription().Duration)
})
deployNetperf := func() string {
randomNamespace := deploymentManager.DeployRandomNamespace(DemoDaemonSet)
deploymentManager.Deploy(randomNamespace, NetperfPods)
deploymentManager.WaitUntilReady()
_, err := kubectl.GetPodsIPs(randomNamespace, NetperfPods.LabelSelector)
Expect(err).To(BeNil(), "Cannot get pods ips")
_, _, err = kubectl.GetServiceHostPort(randomNamespace, "netperf-service")
Expect(err).To(BeNil(), "cannot get service netperf ip")
return randomNamespace
}
deployHTTPclientAndServer := func() string {
randomNamespace := deploymentManager.DeployRandomNamespace(HttpServer)
deploymentManager.Deploy(randomNamespace, HttpClients)
deploymentManager.WaitUntilReady()
_, err := kubectl.GetPodsIPs(randomNamespace, HttpClients.LabelSelector)
Expect(err).To(BeNil(), "Cannot get pods ips")
_, err = kubectl.GetPodsIPs(randomNamespace, HttpServer.LabelSelector)
Expect(err).To(BeNil(), "Cannot get pods ips")
return randomNamespace
}
Context("MonitorAggregation", func() {
It("Checks that monitor aggregation restricts notifications", func() {
deploymentManager.DeployCilium(map[string]string{
"bpf.monitorAggregation": "medium",
"bpf.monitorInterval": "60s",
"bpf.monitorFlags": "syn",
// Need to disable the host firewall for now due to complexity issue.
// See #14552 for details.
"hostFirewall.enabled": "false",
}, DeployCiliumOptionsAndDNS)
monitorRes, monitorCancel, targetIP := monitorConnectivityAcrossNodes(kubectl)
defer monitorCancel()
var monitorOutput []byte
searchMonitorLog := func(expr *regexp.Regexp) bool {
monitorOutput = monitorRes.CombineOutput().Bytes()
egressMatches := expr.FindAllIndex(monitorOutput, -1)
return len(egressMatches) > 0
}
By("Checking that ICMP notifications in egress direction were observed")
expEgress := fmt.Sprintf("ICMPv4.*DstIP=%s", targetIP)
expEgressRegex := regexp.MustCompile(expEgress)
Eventually(func() bool {
return searchMonitorLog(expEgressRegex)
}, helpers.HelperTimeout, time.Second).Should(BeTrue(), "Egress ICMPv4 flow (%q) not found in monitor log\n%s", expEgress, monitorOutput)
By("Checking that ICMP notifications in ingress direction were observed")
expIngress := fmt.Sprintf("ICMPv4.*SrcIP=%s", targetIP)
expIngressRegex := regexp.MustCompile(expIngress)
Eventually(func() bool {
return searchMonitorLog(expIngressRegex)
}, helpers.HelperTimeout, time.Second).Should(BeTrue(), "Ingress ICMPv4 flow (%q) not found in monitor log\n%s", expIngress, monitorOutput)
By("Checking the set of TCP notifications received matches expectations")
// | TCP Flags | Direction | Report? | Why?
// +===========+===========+=========+=====
// | SYN | -> | Y | monitorFlags=SYN
// | SYN / ACK | <- | Y | monitorFlags=SYN
// | ACK | -> | N | monitorFlags=(!ACK)
// | ACK | ... | N | monitorFlags=(!ACK)
// | ACK | <- | N | monitorFlags=(!ACK)
// | FIN | -> | Y | monitorAggregation=medium
// | FIN / ACK | <- | Y | monitorAggregation=medium
// | ACK | -> | Y | monitorAggregation=medium
egressPktCount := 3
ingressPktCount := 2
Eventually(func() bool {
monitorOutput = monitorRes.CombineOutput().Bytes()
return checkMonitorOutput(monitorOutput, egressPktCount, ingressPktCount)
}, helpers.HelperTimeout, time.Second).Should(BeTrue(), "Monitor log did not contain %d ingress and %d egress TCP notifications\n%s",
ingressPktCount, egressPktCount, monitorOutput)
helpers.WriteToReportFile(monitorOutput, monitorLog)
})
It("Checks that monitor aggregation flags send notifications", func() {
deploymentManager.DeployCilium(map[string]string{
"bpf.monitorAggregation": "medium",
"bpf.monitorInterval": "60s",
"bpf.monitorFlags": "psh",
}, DeployCiliumOptionsAndDNS)
monitorRes, monitorCancel, _ := monitorConnectivityAcrossNodes(kubectl)
defer monitorCancel()
var monitorOutput []byte
By("Checking the set of TCP notifications received matches expectations")
// | TCP Flags | Direction | Report? | Why?
// +===========+===========+=========+=====
// | SYN | -> | Y | monitorAggregation=medium
// | SYN / ACK | <- | Y | monitorAggregation=medium
// | ACK | -> | N | monitorFlags=(!ACK)
// | ACK | ... | N | monitorFlags=(!ACK)
// | PSH | -> | Y | monitorFlags=(PSH)
// | PSH | <- | Y | monitorFlags=(PSH)
// | FIN | -> | Y | monitorAggregation=medium
// | FIN / ACK | <- | Y | monitorAggregation=medium
// | ACK | -> | Y | monitorAggregation=medium
egressPktCount := 4
ingressPktCount := 3
Eventually(func() bool {
monitorOutput = monitorRes.CombineOutput().Bytes()
return checkMonitorOutput(monitorOutput, egressPktCount, ingressPktCount)
}, helpers.HelperTimeout, time.Second).Should(BeTrue(), "monitor aggregation did not result in correct number of TCP notifications\n%s", monitorOutput)
helpers.WriteToReportFile(monitorOutput, monitorLog)
})
})
SkipContextIf(helpers.SkipQuarantined, "Encapsulation", func() {
validateBPFTunnelMap := func() {
By("Checking that BPF tunnels are in place")
ciliumPod, err := kubectl.GetCiliumPodOnNode(helpers.K8s1)
ExpectWithOffset(1, err).Should(BeNil(), "Unable to determine cilium pod on node %s", helpers.K8s1)
status := kubectl.CiliumExecMustSucceed(context.TODO(), ciliumPod, "cilium bpf tunnel list | wc -l")
// ipv4+ipv6: 2 entries for each remote node + 1 header row
numEntries := (kubectl.GetNumCiliumNodes()-1)*2 + 1
if value := helpers.HelmOverride("ipv6.enabled"); value == "false" {
// ipv4 only: 1 entry for each remote node + 1 header row
numEntries = (kubectl.GetNumCiliumNodes() - 1) + 1
}
Expect(status.IntOutput()).Should(Equal(numEntries), "Did not find expected number of entries in BPF tunnel map")
}
enableVXLANTunneling := func(options map[string]string) {
options["tunnel"] = "vxlan"
if helpers.RunsOnGKE() {
// We need to disable gke.enabled as it disables tunneling.
options["gke.enabled"] = "false"
options["endpointRoutes.enabled"] = "true"
}
}
SkipItIf(func() bool {
// IPsec + encapsulation requires Linux 4.19.
// We also can't disable KPR on GKE at the moment (cf. #16597).
return helpers.RunsWithoutKubeProxy() || helpers.DoesNotRunOn419OrLaterKernel() || helpers.RunsOnGKE()
}, "Check connectivity with transparent encryption and VXLAN encapsulation", func() {
deploymentManager.Deploy(helpers.CiliumNamespace, IPSecSecret)
options := map[string]string{
"kubeProxyReplacement": "disabled",
"encryption.enabled": "true",
}
enableVXLANTunneling(options)
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
validateBPFTunnelMap()
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test with IPsec between nodes failed")
}, 600)
It("Check connectivity with sockops and VXLAN encapsulation", func() {
// Note if run on kernel without sockops feature is ignored
if !helpers.RunsOn419OrLaterKernel() {
Skip("Skipping sockops testing before 4.19 kernel")
return
}
options := map[string]string{
"sockops.enabled": "true",
}
enableVXLANTunneling(options)
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
validateBPFTunnelMap()
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
Expect(testPodConnectivitySameNodes(kubectl)).Should(BeTrue(), "Connectivity test on same node failed")
}, 600)
It("Check connectivity with VXLAN encapsulation", func() {
options := map[string]string{}
enableVXLANTunneling(options)
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
validateBPFTunnelMap()
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
}, 600)
// Geneve is currently not supported on GKE
SkipItIf(helpers.RunsOnGKE, "Check connectivity with Geneve encapsulation", func() {
deploymentManager.DeployCilium(map[string]string{
"tunnel": "geneve",
}, DeployCiliumOptionsAndDNS)
validateBPFTunnelMap()
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
It("Check vxlan connectivity with per-endpoint routes", func() {
options := map[string]string{
"endpointRoutes.enabled": "true",
}
enableVXLANTunneling(options)
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
if helpers.RunsOn419OrLaterKernel() {
By("Test BPF masquerade")
Expect(testPodHTTPToOutside(kubectl, "http://google.com", false, false)).
Should(BeTrue(), "Connectivity test to http://google.com failed")
}
})
SkipItIf(func() bool {
// IPsec + encapsulation requires Linux 4.19.
// We also can't disable KPR on GKE at the moment (cf. #16597).
return helpers.RunsWithoutKubeProxy() || helpers.DoesNotRunOn419OrLaterKernel() || helpers.RunsOnGKE()
}, "Check connectivity with transparent encryption, VXLAN, and endpoint routes", func() {
deploymentManager.Deploy(helpers.CiliumNamespace, IPSecSecret)
options := map[string]string{
"kubeProxyReplacement": "disabled",
"encryption.enabled": "true",
"endpointRoutes.enabled": "true",
}
enableVXLANTunneling(options)
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
validateBPFTunnelMap()
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test with IPsec between nodes failed")
}, 600)
It("Check iptables masquerading with random-fully", func() {
options := map[string]string{
"bpf.masquerade": "false",
"iptablesRandomFully": "true",
}
enableVXLANTunneling(options)
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
By("Test iptables masquerading")
Expect(testPodHTTPToOutside(kubectl, "http://google.com", false, false)).
Should(BeTrue(), "Connectivity test to http://google.com failed")
})
It("Check iptables masquerading without random-fully", func() {
options := map[string]string{
"bpf.masquerade": "false",
}
enableVXLANTunneling(options)
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
By("Test iptables masquerading")
Expect(testPodHTTPToOutside(kubectl, "http://google.com", false, false)).
Should(BeTrue(), "Connectivity test to http://google.com failed")
})
})
// DirectRouting without AutoDirectNodeRoutes not supported outside of GKE.
SkipContextIf(helpers.DoesNotRunOnGKE, "DirectRouting", func() {
It("Check connectivity with direct routing", func() {
deploymentManager.DeployCilium(map[string]string{
"tunnel": "disabled",
"k8s.requireIPv4PodCIDR": "true",
"endpointRoutes.enabled": "false",
}, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
It("Check connectivity with direct routing and endpointRoutes", func() {
deploymentManager.DeployCilium(map[string]string{
"tunnel": "disabled",
"k8s.requireIPv4PodCIDR": "true",
"endpointRoutes.enabled": "true",
}, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
})
Context("AutoDirectNodeRoutes", func() {
BeforeEach(func() {
SkipIfIntegration(helpers.CIIntegrationGKE)
})
It("Check connectivity with automatic direct nodes routes", func() {
options := map[string]string{
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
}
// Needed to bypass bug with masquerading when devices are set. See #12141.
if helpers.DoesNotRunWithKubeProxyReplacement() {
options["masquerade"] = "false"
}
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
if helpers.RunsOn419OrLaterKernel() {
By("Test BPF masquerade")
Expect(testPodHTTPToOutside(kubectl, "http://google.com", false, false)).
Should(BeTrue(), "Connectivity test to http://google.com failed")
}
})
It("Check direct connectivity with per endpoint routes", func() {
options := map[string]string{
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
"endpointRoutes.enabled": "true",
"ipv6.enabled": "false",
}
// Needed to bypass bug with masquerading when devices are set. See #12141.
if helpers.DoesNotRunWithKubeProxyReplacement() {
options["masquerade"] = "false"
}
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
It("Check connectivity with sockops and direct routing", func() {
// Note if run on kernel without sockops feature is ignored
if !helpers.RunsOn419OrLaterKernel() {
Skip("Skipping sockops testing before 4.19 kernel")
return
}
deploymentManager.DeployCilium(map[string]string{
"sockops.enabled": "true",
}, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
Expect(testPodConnectivitySameNodes(kubectl)).Should(BeTrue(), "Connectivity test on same node failed")
}, 600)
})
SkipContextIf(func() bool {
return helpers.RunsWithKubeProxyReplacement() || helpers.GetCurrentIntegration() != "" || helpers.SkipQuarantined()
}, "IPv6 masquerading", func() {
var (
k8s1EndpointIPs map[string]string
testDSK8s1IPv6 string = "fd03::310"
)
BeforeAll(func() {
deploymentManager.DeployCilium(map[string]string{
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
}, DeployCiliumOptionsAndDNS)
pod, err := kubectl.GetCiliumPodOnNode(helpers.K8s1)
Expect(err).Should(BeNil(), "Cannot get cilium pod on node %s", helpers.K8s1)
k8s1EndpointIPs = kubectl.CiliumEndpointIPv6(pod, "-l k8s:zgroup=testDS,k8s:io.kubernetes.pod.namespace=default")
k8s1Backends := []string{}
for _, epIP := range k8s1EndpointIPs {
k8s1Backends = append(k8s1Backends, net.JoinHostPort(epIP, "80"))
}
ciliumAddService(kubectl, 31080, net.JoinHostPort(testDSK8s1IPv6, "80"), k8s1Backends, "ClusterIP", "Cluster")
})
It("across K8s nodes", func() {
pod, err := kubectl.GetCiliumPodOnNode(helpers.K8s2)
Expect(err).Should(BeNil(), "Cannot get cilium pod on node %s", helpers.K8s2)
k8s2EndpointIPs := kubectl.CiliumEndpointIPv6(pod, fmt.Sprintf("-l k8s:%s,k8s:io.kubernetes.pod.namespace=default", testDSK8s2))
k8s2ClientIPv6 := ""
for _, epIP := range k8s2EndpointIPs {
k8s2ClientIPv6 = epIP
break
}
Expect(k8s2ClientIPv6).ShouldNot(BeEmpty(), "Cannot get client IPv6")
url := fmt.Sprintf(`"http://[%s]:80/"`, testDSK8s1IPv6)
testCurlFromPodWithSourceIPCheck(kubectl, testDSK8s2, url, 5, k8s2ClientIPv6)
for _, epIP := range k8s1EndpointIPs {
url = fmt.Sprintf(`"http://[%s]:80/"`, epIP)
testCurlFromPodWithSourceIPCheck(kubectl, testDSK8s2, url, 5, k8s2ClientIPv6)
}
})
AfterAll(func() {
ciliumDelService(kubectl, 31080)
})
})
SkipContextIf(func() bool {
return helpers.DoesNotExistNodeWithoutCilium() || helpers.DoesNotRunOn419OrLaterKernel()
}, "Check BPF masquerading with ip-masq-agent", func() {
var (
tmpEchoPodPath string
tmpConfigMapDirPath string
tmpConfigMapPath string
tmpConfigYAMLPath string
)
installConfig := func(cidrsInYaml string) {
ns := helpers.GetCiliumNamespace(helpers.GetCurrentIntegration())
kubectl.ExecMiddle(fmt.Sprintf("echo 'nonMasqueradeCIDRs:\n%s' > %s",
cidrsInYaml, tmpConfigMapPath)).ExpectSuccess()
kubectl.CreateResource("configmap",
fmt.Sprintf("ip-masq-agent --from-file=%s --namespace=%s -o yaml --dry-run > %s",
tmpConfigMapDirPath, ns, tmpConfigYAMLPath)).
ExpectSuccess("Failed to create ip-masq-agent configmap file")
kubectl.ApplyDefault(tmpConfigYAMLPath).ExpectSuccess("Failed to apply configmap")
}
BeforeAll(func() {
// Deploy echoserver on the node which does not run Cilium to test
// BPF masquerading. The pod will run in the host netns, so no CNI
// is required for the pod on that host.
echoPodPath := helpers.ManifestGet(kubectl.BasePath(), "echoserver-hostnetns.yaml")
res := kubectl.ExecMiddle("mktemp")
res.ExpectSuccess()
tmpEchoPodPath = strings.Trim(res.Stdout(), "\n")
kubectl.ExecMiddle(fmt.Sprintf("sed 's/NODE_WITHOUT_CILIUM/%s/' %s > %s",
helpers.GetNodeWithoutCilium(), echoPodPath, tmpEchoPodPath)).ExpectSuccess()
kubectl.ApplyDefault(tmpEchoPodPath).ExpectSuccess("Cannot install echoserver application")
Expect(kubectl.WaitforPods(helpers.DefaultNamespace, "-l name=echoserver-hostnetns",
helpers.HelperTimeout)).Should(BeNil())
// Setup ip-masq-agent configmap dir
res = kubectl.ExecMiddle("mktemp -d")
res.ExpectSuccess()
tmpConfigMapDirPath = strings.Trim(res.Stdout(), "\n")
tmpConfigMapPath = filepath.Join(tmpConfigMapDirPath, "config")
res = kubectl.ExecMiddle("mktemp")
res.ExpectSuccess()
tmpConfigYAMLPath = strings.Trim(res.Stdout(), "\n")
// Deploy empty ip-masq-agent config to prevent the ipmasq agent from
// adding the default nonMasq CIDRs which include the echoserver's
// node IP. This is needed, as the first test case expects the request
// to be masqueraded.
installConfig("")
})
AfterEach(func() {
// Don't remove so that the default nonMasq CIDRs are not installed
installConfig("")
})
AfterAll(func() {
ns := helpers.GetCiliumNamespace(helpers.GetCurrentIntegration())
kubectl.DeleteResource("configmap", fmt.Sprintf("ip-masq-agent --namespace=%s", ns))
if tmpEchoPodPath != "" {
kubectl.Delete(tmpEchoPodPath)
}
for _, path := range []string{tmpEchoPodPath, tmpConfigMapPath, tmpConfigMapDirPath, tmpConfigYAMLPath} {
if path != "" {
os.Remove(path)
}
}
})
testIPMasqAgent := func() {
// Check that requests to the echoserver from client pods are masqueraded.
nodeIP, err := kubectl.GetNodeIPByLabel(helpers.GetNodeWithoutCilium(), false)
Expect(err).Should(BeNil())
Expect(testPodHTTPToOutside(kubectl,
fmt.Sprintf("http://%s:80", nodeIP), true, false)).Should(BeTrue(),
"Connectivity test to http://%s failed", nodeIP)
// Update ip-masq-agent config to prevent masquerading to the node IP
// which is running the echoserver.
installConfig(fmt.Sprintf("- %s/32", nodeIP))
// Wait until the ip-masq-agent config update is handled by the agent
time.Sleep(90 * time.Second)
// Check that connections from the client pods are not masqueraded
Expect(testPodHTTPToOutside(kubectl,
fmt.Sprintf("http://%s:80", nodeIP), false, true)).Should(BeTrue(),
"Connectivity test to http://%s failed", nodeIP)
}
It("DirectRouting", func() {
deploymentManager.DeployCilium(map[string]string{
"ipMasqAgent.enabled": "true",
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
}, DeployCiliumOptionsAndDNS)
testIPMasqAgent()
})
It("VXLAN", func() {
deploymentManager.DeployCilium(map[string]string{
"ipMasqAgent.enabled": "true",
"tunnel": "vxlan",
}, DeployCiliumOptionsAndDNS)
testIPMasqAgent()
})
})
SkipContextIf(helpers.DoesNotRunOnNetNextKernel, "Wireguard encryption", func() {
testWireguard := func(interNodeDev string) {
randomNamespace := deploymentManager.DeployRandomNamespaceShared(DemoDaemonSet)
deploymentManager.WaitUntilReady()
k8s1NodeName, k8s1IP := kubectl.GetNodeInfo(helpers.K8s1)
k8s2NodeName, k8s2IP := kubectl.GetNodeInfo(helpers.K8s2)
// Fetch srcPod (testDSClient@k8s1)
srcPod, srcPodJSON := fetchPodsWithOffset(kubectl, randomNamespace, "client", "zgroup=testDSClient", k8s2IP, true, 0)
srcPodIP, err := srcPodJSON.Filter("{.status.podIP}")
ExpectWithOffset(1, err).Should(BeNil(), "Failure to retrieve pod IP %s", srcPod)
srcHost, err := srcPodJSON.Filter("{.status.hostIP}")
ExpectWithOffset(1, err).Should(BeNil(), "Failure to retrieve host of pod %s", srcPod)
// Sanity check
ExpectWithOffset(1, srcHost.String()).Should(Equal(k8s1IP))
// Fetch srcPod IPv6
ciliumPodK8s1, err := kubectl.GetCiliumPodOnNode(helpers.K8s1)
ExpectWithOffset(1, err).Should(BeNil(), "Unable to fetch cilium pod on k8s1")
endpointIPs := kubectl.CiliumEndpointIPv6(ciliumPodK8s1, "-l k8s:zgroup=testDSClient")
// Sanity check
ExpectWithOffset(1, len(endpointIPs)).Should(Equal(1), "BUG: more than one DS client on %s", ciliumPodK8s1)
var srcPodIPv6 string
for _, ip := range endpointIPs {
srcPodIPv6 = ip
break
}
// Fetch dstPod (testDS@k8s2)
dstPod, dstPodJSON := fetchPodsWithOffset(kubectl, randomNamespace, "server", "zgroup=testDS", k8s1IP, true, 0)
dstPodIP, err := dstPodJSON.Filter("{.status.podIP}")
ExpectWithOffset(1, err).Should(BeNil(), "Failure to retrieve IP of pod %s", dstPod)
dstHost, err := dstPodJSON.Filter("{.status.hostIP}")
ExpectWithOffset(1, err).Should(BeNil(), "Failure to retrieve host of pod %s", dstPod)
// Sanity check
ExpectWithOffset(1, dstHost.String()).Should(Equal(k8s2IP))
// Fetch dstPod IPv6
ciliumPodK8s2, err := kubectl.GetCiliumPodOnNode(helpers.K8s2)
ExpectWithOffset(1, err).Should(BeNil(), "Unable to fetch cilium pod on k8s2")
endpointIPs = kubectl.CiliumEndpointIPv6(ciliumPodK8s2, "-l k8s:zgroup=testDS")
// Sanity check
ExpectWithOffset(1, len(endpointIPs)).Should(Equal(1), "BUG: more than one DS server on %s", ciliumPodK8s2)
var dstPodIPv6 string
for _, ip := range endpointIPs {
dstPodIPv6 = ip
break
}
// Due to IPCache update delays, it can take up to a few seconds
// before both nodes have added the new pod IPs to their allowedIPs
// list, which can cause flakes in CI. Therefore wait for the
// IPs to be present on both nodes before performing the test
waitForAllowedIP := func(ciliumPod, ip string) {
jsonpath := fmt.Sprintf(`{.encryption.wireguard.interfaces[*].peers[*].allowed-ips[?(@=='%s')]}`, ip)
ciliumCmd := fmt.Sprintf(`cilium debuginfo --output jsonpath="%s"`, jsonpath)
expected := fmt.Sprintf("jsonpath=%s", ip)
err := kubectl.CiliumExecUntilMatch(ciliumPod, ciliumCmd, expected)
Expect(err).To(BeNil(), "ip %q not in allowedIPs of pod %q", ip, ciliumPod)
}
waitForAllowedIP(ciliumPodK8s1, fmt.Sprintf("%s/32", dstPodIP))
waitForAllowedIP(ciliumPodK8s1, fmt.Sprintf("%s/128", dstPodIPv6))
waitForAllowedIP(ciliumPodK8s2, fmt.Sprintf("%s/32", srcPodIP))
waitForAllowedIP(ciliumPodK8s2, fmt.Sprintf("%s/128", srcPodIPv6))
checkNoLeak := func(srcPod, srcIP, dstIP string) {
cmd := fmt.Sprintf("tcpdump -i %s --immediate-mode -n 'host %s and host %s' -c 1", interNodeDev, srcIP, dstIP)
res1, cancel1, err := kubectl.ExecInHostNetNSInBackground(context.TODO(), k8s1NodeName, cmd)
ExpectWithOffset(2, err).Should(BeNil(), "Cannot exec tcpdump in bg")
res2, cancel2, err := kubectl.ExecInHostNetNSInBackground(context.TODO(), k8s2NodeName, cmd)
ExpectWithOffset(2, err).Should(BeNil(), "Cannot exec tcpdump in bg")
// HTTP connectivity test (pod2pod)
kubectl.ExecPodCmd(randomNamespace, srcPod,
helpers.CurlFail("http://%s/", net.JoinHostPort(dstIP, "80"))).ExpectSuccess("Failed to curl dst pod")
// Check that no unencrypted pod2pod traffic was captured on the direct routing device
cancel1()
cancel2()
ExpectWithOffset(2, res1.CombineOutput().String()).Should(Not(ContainSubstring("1 packet captured")))
ExpectWithOffset(2, res2.CombineOutput().String()).Should(Not(ContainSubstring("1 packet captured")))
}
checkNoLeak(srcPod, srcPodIP.String(), dstPodIP.String())
checkNoLeak(srcPod, srcPodIPv6, dstPodIPv6)
// Check that the src pod can reach the remote host
kubectl.ExecPodCmd(randomNamespace, srcPod, helpers.Ping(k8s2IP)).
ExpectSuccess("Failed to ping k8s2 host from src pod")
// Check that the remote host can reach the dst pod
kubectl.ExecInHostNetNS(context.TODO(), k8s1NodeName,
helpers.CurlFail("http://%s:80/", dstPodIP)).ExpectSuccess("Failed to curl dst pod from k8s1")
}
It("Pod2pod is encrypted in direct-routing mode", func() {
deploymentManager.DeployCilium(map[string]string{
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
"encryption.enabled": "true",
"encryption.type": "wireguard",
"l7Proxy": "false",
}, DeployCiliumOptionsAndDNS)
privateIface, err := kubectl.GetPrivateIface()
Expect(err).Should(BeNil(), "Cannot determine private iface")
testWireguard(privateIface)
})
It("Pod2pod is encrypted in tunneling mode", func() {
deploymentManager.DeployCilium(map[string]string{
"tunnel": "vxlan",
"encryption.enabled": "true",
"encryption.type": "wireguard",
"l7Proxy": "false",
}, DeployCiliumOptionsAndDNS)
testWireguard("cilium_vxlan")
})
It("Pod2pod is encrypted in tunneling mode with per-endpoint routes", func() {
deploymentManager.DeployCilium(map[string]string{
"tunnel": "vxlan",
"endpointRoutes.enabled": "true",
"encryption.enabled": "true",
"encryption.type": "wireguard",
"l7Proxy": "false",
}, DeployCiliumOptionsAndDNS)
testWireguard("cilium_vxlan")
})
})
Context("Sockops performance", func() {
directRoutingOptions := map[string]string{
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
}
sockopsEnabledOptions := map[string]string{}
for k, v := range directRoutingOptions {
sockopsEnabledOptions[k] = v
}
sockopsEnabledOptions["sockops.enabled"] = "true"
BeforeEach(func() {
SkipIfBenchmark()
SkipIfIntegration(helpers.CIIntegrationGKE)
})
It("Check baseline performance with direct routing TCP_CRR", func() {
Skip("Skipping TCP_CRR until fix reaches upstream")
deploymentManager.DeployCilium(directRoutingOptions, DeployCiliumOptionsAndDNS)
namespace := deployNetperf()
Expect(testPodNetperfSameNodes(kubectl, namespace, helpers.TCP_CRR)).Should(BeTrue(), "Connectivity test TCP_CRR on same node failed")
}, 600)
It("Check baseline performance with direct routing TCP_RR", func() {
deploymentManager.DeployCilium(directRoutingOptions, DeployCiliumOptionsAndDNS)
namespace := deployNetperf()
Expect(testPodNetperfSameNodes(kubectl, namespace, helpers.TCP_RR)).Should(BeTrue(), "Connectivity test TCP_RR on same node failed")
}, 600)
It("Check baseline performance with direct routing TCP_STREAM", func() {
deploymentManager.DeployCilium(directRoutingOptions, DeployCiliumOptionsAndDNS)
namespace := deployNetperf()
Expect(testPodNetperfSameNodes(kubectl, namespace, helpers.TCP_STREAM)).Should(BeTrue(), "Connectivity test TCP_STREAM on same node failed")
}, 600)
It("Check performance with sockops and direct routing", func() {
Skip("Skipping TCP_CRR until fix reaches upstream")
deploymentManager.DeployCilium(sockopsEnabledOptions, DeployCiliumOptionsAndDNS)
namespace := deployNetperf()
Expect(testPodNetperfSameNodes(kubectl, namespace, helpers.TCP_CRR)).Should(BeTrue(), "Connectivity test TCP_CRR on same node failed")
}, 600)
It("Check performance with sockops and direct routing", func() {
deploymentManager.DeployCilium(sockopsEnabledOptions, DeployCiliumOptionsAndDNS)
namespace := deployNetperf()
Expect(testPodNetperfSameNodes(kubectl, namespace, helpers.TCP_RR)).Should(BeTrue(), "Connectivity test TCP_RR on same node failed")
}, 600)
It("Check performance with sockops and direct routing", func() {
deploymentManager.DeployCilium(sockopsEnabledOptions, DeployCiliumOptionsAndDNS)
namespace := deployNetperf()
Expect(testPodNetperfSameNodes(kubectl, namespace, helpers.TCP_STREAM)).Should(BeTrue(), "Connectivity test TCP_STREAM on same node failed")
}, 600)
It("Check baseline http performance with sockops and direct routing", func() {
deploymentManager.DeployCilium(directRoutingOptions, DeployCiliumOptionsAndDNS)
namespace := deployHTTPclientAndServer()
Expect(testPodHTTPSameNodes(kubectl, namespace)).Should(BeTrue(), "HTTP test on same node failed ")
}, 600)
It("Check http performance with sockops and direct routing", func() {
deploymentManager.DeployCilium(sockopsEnabledOptions, DeployCiliumOptionsAndDNS)
namespace := deployHTTPclientAndServer()
Expect(testPodHTTPSameNodes(kubectl, namespace)).Should(BeTrue(), "HTTP test on same node failed ")
}, 600)
})
SkipContextIf(func() bool {
return helpers.RunsOnGKE() || helpers.RunsWithoutKubeProxy()
}, "Transparent encryption DirectRouting", func() {
var privateIface string
BeforeAll(func() {
Eventually(func() (string, error) {
iface, err := kubectl.GetPrivateIface()
privateIface = iface
return iface, err
}, helpers.MidCommandTimeout, time.Second).ShouldNot(BeEmpty(),
"Unable to determine private iface")
})
It("Check connectivity with transparent encryption and direct routing", func() {
deploymentManager.Deploy(helpers.CiliumNamespace, IPSecSecret)
deploymentManager.DeployCilium(map[string]string{
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
"encryption.enabled": "true",
"encryption.ipsec.interface": privateIface,
"devices": "",
"hostFirewall.enabled": "false",
"kubeProxyReplacement": "disabled",
}, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
SkipItIf(helpers.RunsWithoutKubeProxy, "Check connectivity with transparent encryption and direct routing with bpf_host", func() {
privateIface, err := kubectl.GetPrivateIface()
Expect(err).Should(BeNil(), "Unable to determine the private interface")
defaultIface, err := kubectl.GetDefaultIface()
Expect(err).Should(BeNil(), "Unable to determine the default interface")
devices := fmt.Sprintf(`'{%s,%s}'`, privateIface, defaultIface)
deploymentManager.Deploy(helpers.CiliumNamespace, IPSecSecret)
deploymentManager.DeployCilium(map[string]string{
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
"encryption.enabled": "true",
"encryption.ipsec.interface": privateIface,
"devices": devices,
"hostFirewall.enabled": "false",
"kubeProxyReplacement": "disabled",
}, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
})
Context("IPv4Only", func() {
It("Check connectivity with IPv6 disabled", func() {
deploymentManager.DeployCilium(map[string]string{
"ipv4.enabled": "true",
"ipv6.enabled": "false",
}, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
})
Context("Etcd", func() {
It("Check connectivity", func() {
deploymentManager.Deploy(helpers.CiliumNamespace, StatelessEtcd)
deploymentManager.WaitUntilReady()
host, port, err := kubectl.GetServiceHostPort(helpers.CiliumNamespace, "stateless-etcd")
Expect(err).Should(BeNil(), "Unable to retrieve ClusterIP and port for stateless-etcd service")
etcdService := fmt.Sprintf("http://%s:%d", host, port)
opts := map[string]string{
"etcd.enabled": "true",
"etcd.endpoints[0]": etcdService,
"identityAllocationMode": "kvstore",
}
if helpers.ExistNodeWithoutCilium() {
opts["synchronizeK8sNodes"] = "false"
}
deploymentManager.DeployCilium(opts, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
})
Context("Host firewall", func() {
BeforeAll(func() {
kubectl.Exec("kubectl label nodes --all status=lockdown")
})
AfterAll(func() {
kubectl.Exec("kubectl label nodes --all status-")
})
SkipItIf(func() bool {
return !helpers.IsIntegration(helpers.CIIntegrationGKE)
}, "Check connectivity with IPv6 disabled", func() {
deploymentManager.DeployCilium(map[string]string{
"ipv4.enabled": "true",
"ipv6.enabled": "false",
"hostFirewall.enabled": "true",
}, DeployCiliumOptionsAndDNS)
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
})
It("With VXLAN", func() {
options := map[string]string{
"hostFirewall.enabled": "true",
}
if helpers.RunsOnGKE() {
options["gke.enabled"] = "false"
options["tunnel"] = "vxlan"
}
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
testHostFirewall(kubectl)
})
It("With VXLAN and endpoint routes", func() {
options := map[string]string{
"hostFirewall.enabled": "true",
"endpointRoutes.enabled": "true",
}
if helpers.RunsOnGKE() {
options["gke.enabled"] = "false"
options["tunnel"] = "vxlan"
}
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
testHostFirewall(kubectl)
})
It("With native routing", func() {
options := map[string]string{
"hostFirewall.enabled": "true",
"tunnel": "disabled",
}
// We don't want to run with per-endpoint routes (enabled by
// gke.enabled) for this test.
if helpers.RunsOnGKE() {
options["gke.enabled"] = "false"
} else {
options["autoDirectNodeRoutes"] = "true"
}
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
testHostFirewall(kubectl)
})
It("With native routing and endpoint routes", func() {
options := map[string]string{
"hostFirewall.enabled": "true",
"tunnel": "disabled",
"endpointRoutes.enabled": "true",
}
if !helpers.RunsOnGKE() {
options["autoDirectNodeRoutes"] = "true"
}
deploymentManager.DeployCilium(options, DeployCiliumOptionsAndDNS)
testHostFirewall(kubectl)
})
})
Context("Iptables", func() {
SkipItIf(func() bool {
return helpers.IsIntegration(helpers.CIIntegrationGKE) || helpers.DoesNotRunWithKubeProxyReplacement()
}, "Skip conntrack for pod traffic", func() {
deploymentManager.DeployCilium(map[string]string{
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
"installNoConntrackIptablesRules": "true",
}, DeployCiliumOptionsAndDNS)
ciliumPod, err := kubectl.GetCiliumPodOnNode(helpers.K8s1)
ExpectWithOffset(1, err).Should(BeNil(), "Unable to determine cilium pod on node %s", helpers.K8s1)
res := kubectl.ExecPodCmd(helpers.CiliumNamespace, ciliumPod, "sh -c 'apt update && apt install -y conntrack && conntrack -F'")
Expect(res.WasSuccessful()).Should(BeTrue(), "Cannot flush conntrack table")
Expect(testPodConnectivityAcrossNodes(kubectl)).Should(BeTrue(), "Connectivity test between nodes failed")
cmd := fmt.Sprintf("iptables -t raw -C CILIUM_PRE_raw -s %s -m comment --comment 'cilium: NOTRACK for pod traffic' -j CT --notrack", helpers.NativeRoutingCIDR)
res = kubectl.ExecPodCmd(helpers.CiliumNamespace, ciliumPod, cmd)
Expect(res.WasSuccessful()).Should(BeTrue(), "Missing '-j CT --notrack' iptables rule")
cmd = fmt.Sprintf("iptables -t raw -C CILIUM_PRE_raw -d %s -m comment --comment 'cilium: NOTRACK for pod traffic' -j CT --notrack", helpers.NativeRoutingCIDR)
res = kubectl.ExecPodCmd(helpers.CiliumNamespace, ciliumPod, cmd)
Expect(res.WasSuccessful()).Should(BeTrue(), "Missing '-j CT --notrack' iptables rule")
cmd = fmt.Sprintf("iptables -t raw -C CILIUM_OUTPUT_raw -s %s -m comment --comment 'cilium: NOTRACK for pod traffic' -j CT --notrack", helpers.NativeRoutingCIDR)
res = kubectl.ExecPodCmd(helpers.CiliumNamespace, ciliumPod, cmd)
Expect(res.WasSuccessful()).Should(BeTrue(), "Missing '-j CT --notrack' iptables rule")
cmd = fmt.Sprintf("iptables -t raw -C CILIUM_OUTPUT_raw -d %s -m comment --comment 'cilium: NOTRACK for pod traffic' -j CT --notrack", helpers.NativeRoutingCIDR)
res = kubectl.ExecPodCmd(helpers.CiliumNamespace, ciliumPod, cmd)
Expect(res.WasSuccessful()).Should(BeTrue(), "Missing '-j CT --notrack' iptables rule")
cmd = fmt.Sprintf("conntrack -L -s %s -d %s | wc -l", helpers.NativeRoutingCIDR, helpers.NativeRoutingCIDR)
res = kubectl.ExecPodCmd(helpers.CiliumNamespace, ciliumPod, cmd)
Expect(res.WasSuccessful()).Should(BeTrue(), "Cannot list conntrack entries")
Expect(strings.TrimSpace(res.Stdout())).To(Equal("0"), "Unexpected conntrack entries")
})
})
})
func testHostFirewall(kubectl *helpers.Kubectl) {
randomNs := deploymentManager.DeployRandomNamespaceShared(DemoHostFirewall)
deploymentManager.WaitUntilReady()
demoHostPolicies := helpers.ManifestGet(kubectl.BasePath(), "host-policies.yaml")
By(fmt.Sprintf("Applying policies %s", demoHostPolicies))
_, err := kubectl.CiliumClusterwidePolicyAction(demoHostPolicies, helpers.KubectlApply, helpers.HelperTimeout)
ExpectWithOffset(1, err).Should(BeNil(), fmt.Sprintf("Error creating resource %s: %s", demoHostPolicies, err))
defer func() {
_, err := kubectl.CiliumClusterwidePolicyAction(demoHostPolicies, helpers.KubectlDelete, helpers.HelperTimeout)
ExpectWithOffset(1, err).Should(BeNil(), fmt.Sprintf("Error deleting resource %s: %s", demoHostPolicies, err))
}()
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer GinkgoRecover()
defer wg.Done()
By("Checking host policies on ingress from local pod")
testHostFirewallWithPath(kubectl, randomNs, "zgroup=testClient", "zgroup=testServerHost", false)
}()
wg.Add(1)
go func() {
defer GinkgoRecover()
defer wg.Done()
By("Checking host policies on ingress from remote pod")
testHostFirewallWithPath(kubectl, randomNs, "zgroup=testClient", "zgroup=testServerHost", true)
}()
wg.Add(1)
go func() {
defer GinkgoRecover()
defer wg.Done()
By("Checking host policies on egress to local pod")
testHostFirewallWithPath(kubectl, randomNs, "zgroup=testClientHost", "zgroup=testServer", false)
}()
wg.Add(1)
go func() {
defer GinkgoRecover()
defer wg.Done()
By("Checking host policies on egress to remote pod")
testHostFirewallWithPath(kubectl, randomNs, "zgroup=testClientHost", "zgroup=testServer", true)
}()
wg.Add(1)
go func() {
defer GinkgoRecover()
defer wg.Done()
By("Checking host policies on ingress from remote node")