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Bandwidth.go
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Bandwidth.go
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// Copyright 2020 Authors of Cilium
//
// 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 k8sTest
import (
"context"
"fmt"
. "github.com/cilium/cilium/test/ginkgo-ext"
"github.com/cilium/cilium/test/helpers"
. "github.com/onsi/gomega"
)
var _ = Describe("K8sBandwidthTest", func() {
var (
kubectl *helpers.Kubectl
ciliumFilename string
demoYAML string
)
BeforeAll(func() {
kubectl = helpers.CreateKubectl(helpers.K8s1VMName(), logger)
ciliumFilename = helpers.TimestampFilename("cilium.yaml")
demoYAML = helpers.ManifestGet(kubectl.BasePath(), "demo_bw.yaml")
res := kubectl.ApplyDefault(demoYAML)
res.ExpectSuccess("Unable to apply %s", demoYAML)
})
AfterAll(func() {
_ = kubectl.Delete(demoYAML)
ExpectAllPodsTerminated(kubectl)
UninstallCiliumFromManifest(kubectl, ciliumFilename)
kubectl.CloseSSHClient()
})
SkipContextIf(helpers.DoesNotRunOnNetNextKernel, "Checks Bandwidth Rate-Limiting", func() {
const (
testDS10 = "run=netperf-10"
testDS25 = "run=netperf-25"
testClientPod = "run=netperf-client-pod"
testClientHost = "run=netperf-client-host"
maxRateDeviation = 5
minBandwidth = 1
)
var (
backgroundCancel context.CancelFunc = func() {}
backgroundError error
enableBackgroundReport = true
podLabels = []string{
testDS10,
testDS25,
}
)
AfterFailed(func() {
kubectl.CiliumReport("cilium bpf bandwidth list", "cilium endpoint list")
})
JustBeforeEach(func() {
if enableBackgroundReport {
backgroundCancel, backgroundError = kubectl.BackgroundReport("uptime")
Expect(backgroundError).To(BeNil(), "Cannot start background report process")
}
})
JustAfterEach(func() {
kubectl.ValidateNoErrorsInLogs(CurrentGinkgoTestDescription().Duration)
backgroundCancel()
})
waitForTestPods := func() {
podLabels := []string{
testDS10,
testDS25,
testClientPod,
testClientHost,
}
for _, label := range podLabels {
err := kubectl.WaitforPods(helpers.DefaultNamespace,
fmt.Sprintf("-l %s", label), helpers.HelperTimeout)
Expect(err).Should(BeNil())
}
}
testNetperfFromPods := func(clientPodLabel, targetIP string, maxSessions, rate int) {
pods, err := kubectl.GetPodNames(helpers.DefaultNamespace, clientPodLabel)
ExpectWithOffset(1, err).Should(BeNil(), "cannot retrieve pod names by filter %q",
clientPodLabel)
for i := 1; i <= maxSessions; i++ {
cmd := helpers.SuperNetperf(i, targetIP, helpers.TCP_MAERTS, "")
for _, pod := range pods {
By("Running %d netperf session from %s pod to pod with IP %s (expected rate: %d)",
i, pod, targetIP, rate)
res := kubectl.ExecPodCmd(helpers.DefaultNamespace, pod, cmd)
ExpectWithOffset(1, res).Should(helpers.CMDSuccess(),
"Request from %s pod to pod with IP %s failed", pod, targetIP)
By("Session test completed, netperf result raw: %s", res.SingleOut())
if rate > 0 {
ExpectWithOffset(1, res.InRange(minBandwidth, rate+maxRateDeviation)).To(BeNil(),
"Rate mismatch")
}
}
}
}
testNetperf := func(podLabels []string, fromLabel string) {
for _, label := range podLabels {
podIPs, err := kubectl.GetPodsIPs(helpers.DefaultNamespace, label)
ExpectWithOffset(1, err).Should(BeNil(), "Cannot retrieve pod IPs for %s", label)
ExpectWithOffset(1, len(podIPs)).To(Equal(int(1)), "Expected pod IPs mismatch")
rate := 0
fmt.Sscanf(label, "run=netperf-%d", &rate)
for _, podIP := range podIPs {
testNetperfFromPods(fromLabel, podIP, 1, rate)
}
}
}
It("Checks Pod to Pod bandwidth, vxlan tunneling", func() {
DeployCiliumOptionsAndDNS(kubectl, ciliumFilename, map[string]string{
"bandwidthManager": "true",
"tunnel": "vxlan",
})
waitForTestPods()
testNetperf(podLabels, testClientPod)
testNetperf(podLabels, testClientHost)
})
It("Checks Pod to Pod bandwidth, geneve tunneling", func() {
DeployCiliumOptionsAndDNS(kubectl, ciliumFilename, map[string]string{
"bandwidthManager": "true",
"tunnel": "geneve",
})
waitForTestPods()
testNetperf(podLabels, testClientPod)
testNetperf(podLabels, testClientHost)
})
It("Checks Pod to Pod bandwidth, direct routing", func() {
DeployCiliumOptionsAndDNS(kubectl, ciliumFilename, map[string]string{
"bandwidthManager": "true",
"tunnel": "disabled",
"autoDirectNodeRoutes": "true",
})
waitForTestPods()
testNetperf(podLabels, testClientPod)
testNetperf(podLabels, testClientHost)
})
})
})