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add coverage tests for probes behavior

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Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>
This commit is contained in:
Matthias Bertschy
2024-02-13 09:18:39 +01:00
parent 1dc30bf90f
commit 18f9a08463
1 changed files with 159 additions and 0 deletions
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159
test/e2e_node/container_lifecycle_test.go
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@@ -32,11 +32,15 @@ import (
e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
"k8s.io/kubernetes/test/e2e/nodefeature"
imageutils "k8s.io/kubernetes/test/utils/image"
"k8s.io/utils/ptr"
)
const (
LivenessPrefix = "Liveness"
PostStartPrefix = "PostStart"
PreStopPrefix = "PreStop"
ReadinessPrefix = "Readiness"
StartupPrefix = "Startup"
)
var containerRestartPolicyAlways = v1.ContainerRestartPolicyAlways
@@ -746,6 +750,161 @@ var _ = SIGDescribe(framework.WithNodeConformance(), "Containers Lifecycle", fun
framework.ExpectNoError(results.Starts(prefixedName(PreStopPrefix, regular1)))
framework.ExpectNoError(results.Exits(regular1))
})
ginkgo.When("a pod is terminating because its liveness probe fails", func() {
regular1 := "regular-1"
testPod := func() *v1.Pod {
return &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "test-pod",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
TerminationGracePeriodSeconds: ptr.To(int64(100)),
Containers: []v1.Container{
{
Name: regular1,
Image: imageutils.GetE2EImage(imageutils.BusyBox),
Command: ExecCommand(regular1, execCommand{
Delay: 100,
TerminationSeconds: 15,
ExitCode: 0,
}),
LivenessProbe: &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(LivenessPrefix, regular1), execCommand{
ExitCode: 1,
ContainerName: regular1,
}),
},
},
InitialDelaySeconds: 10,
PeriodSeconds: 1,
FailureThreshold: 1,
},
},
},
},
}
}
f.It("should execute readiness probe while in preStop, but not liveness", f.WithNodeConformance(), func() {
client := e2epod.NewPodClient(f)
podSpec := testPod()
ginkgo.By("creating a pod with a readiness probe and a preStop hook")
podSpec.Spec.Containers[0].Lifecycle = &v1.Lifecycle{
PreStop: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(PreStopPrefix, regular1), execCommand{
Delay: 1,
ExitCode: 0,
ContainerName: regular1,
}),
},
},
}
podSpec.Spec.Containers[0].ReadinessProbe = &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(ReadinessPrefix, regular1), execCommand{
ExitCode: 0,
ContainerName: regular1,
}),
},
},
InitialDelaySeconds: 1,
PeriodSeconds: 1,
}
preparePod(podSpec)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to complete")
err := e2epod.WaitForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.TODO(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
// readiness probes are called during pod termination
framework.ExpectNoError(results.RunTogether(prefixedName(PreStopPrefix, regular1), prefixedName(ReadinessPrefix, regular1)))
// liveness probes are not called during pod termination
err = results.RunTogether(prefixedName(PreStopPrefix, regular1), prefixedName(LivenessPrefix, regular1))
gomega.Expect(err).To(gomega.HaveOccurred())
})
f.It("should continue running liveness probes for restartable init containers and restart them while in preStop", f.WithNodeConformance(), func() {
client := e2epod.NewPodClient(f)
podSpec := testPod()
restartableInit1 := "restartable-init-1"
ginkgo.By("creating a pod with a restartable init container and a preStop hook")
podSpec.Spec.InitContainers = []v1.Container{{
RestartPolicy: &containerRestartPolicyAlways,
Name: restartableInit1,
Image: imageutils.GetE2EImage(imageutils.BusyBox),
Command: ExecCommand(restartableInit1, execCommand{
Delay: 100,
TerminationSeconds: 1,
ExitCode: 0,
}),
LivenessProbe: &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(LivenessPrefix, restartableInit1), execCommand{
ExitCode: 1,
ContainerName: restartableInit1,
}),
},
},
InitialDelaySeconds: 1,
PeriodSeconds: 1,
FailureThreshold: 1,
},
}}
podSpec.Spec.Containers[0].Lifecycle = &v1.Lifecycle{
PreStop: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(PreStopPrefix, regular1), execCommand{
Delay: 40,
ExitCode: 0,
ContainerName: regular1,
}),
},
},
}
preparePod(podSpec)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to complete")
err := e2epod.WaitForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.TODO(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
// FIXME ExpectNoError: this will be implemented in KEP 4438
// liveness probes are called for restartable init containers during pod termination
err = results.RunTogether(prefixedName(PreStopPrefix, regular1), prefixedName(LivenessPrefix, restartableInit1))
gomega.Expect(err).To(gomega.HaveOccurred())
// FIXME ExpectNoError: this will be implemented in KEP 4438
// restartable init containers are restarted during pod termination
err = results.RunTogether(prefixedName(PreStopPrefix, regular1), restartableInit1)
gomega.Expect(err).To(gomega.HaveOccurred())
})
})
})
var _ = SIGDescribe(framework.WithSerial(), "Containers Lifecycle", func() {