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Merge pull request #128683 from AnishShah/validation

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[FG:InPlacePodVerticalScaling] Disallow removing requests & limits for Burstable pods.
This commit is contained in:
Kubernetes Prow Robot
2024-11-08 09:08:43 +00:00
committed by GitHub
parent c25f5eefe4 7680f0f293
commit 2691a29eac
3 changed files with 200 additions and 13 deletions
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36
pkg/apis/core/validation/validation.go
View File

@@ -5596,6 +5596,29 @@ func ValidatePodResize(newPod, oldPod *core.Pod, opts PodValidationOptions) fiel
allErrs = append(allErrs, field.Forbidden(specPath, "Pod running on node without support for resize"))
}
// Do not allow removing resource requests/limits on resize.
if utilfeature.DefaultFeatureGate.Enabled(features.SidecarContainers) {
for ix, ctr := range oldPod.Spec.InitContainers {
if ctr.RestartPolicy != nil && *ctr.RestartPolicy != core.ContainerRestartPolicyAlways {
continue
}
if resourcesRemoved(newPod.Spec.InitContainers[ix].Resources.Requests, ctr.Resources.Requests) {
allErrs = append(allErrs, field.Forbidden(specPath.Child("initContainers").Index(ix).Child("resources").Child("requests"), "resource requests cannot be removed"))
}
if resourcesRemoved(newPod.Spec.InitContainers[ix].Resources.Limits, ctr.Resources.Limits) {
allErrs = append(allErrs, field.Forbidden(specPath.Child("initContainers").Index(ix).Child("resources").Child("limits"), "resource limits cannot be removed"))
}
}
}
for ix, ctr := range oldPod.Spec.Containers {
if resourcesRemoved(newPod.Spec.Containers[ix].Resources.Requests, ctr.Resources.Requests) {
allErrs = append(allErrs, field.Forbidden(specPath.Child("containers").Index(ix).Child("resources").Child("requests"), "resource requests cannot be removed"))
}
if resourcesRemoved(newPod.Spec.Containers[ix].Resources.Limits, ctr.Resources.Limits) {
allErrs = append(allErrs, field.Forbidden(specPath.Child("containers").Index(ix).Child("resources").Child("limits"), "resource limits cannot be removed"))
}
}
// Ensure that only CPU and memory resources are mutable.
originalCPUMemPodSpec := *newPod.Spec.DeepCopy()
var newContainers []core.Container
@@ -5653,6 +5676,19 @@ func isPodResizeRequestSupported(pod core.Pod) bool {
return true
}
func resourcesRemoved(resourceList, oldResourceList core.ResourceList) bool {
if len(oldResourceList) > len(resourceList) {
return true
}
for name := range oldResourceList {
if _, ok := resourceList[name]; !ok {
return true
}
}
return false
}
// ValidatePodBinding tests if required fields in the pod binding are legal.
func ValidatePodBinding(binding *core.Binding) field.ErrorList {
allErrs := field.ErrorList{}

96
pkg/apis/core/validation/validation_test.go
View File

@@ -25463,6 +25463,8 @@ func TestValidateSELinuxChangePolicy(t *testing.T) {
}
func TestValidatePodResize(t *testing.T) {
featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.SidecarContainers, true)
mkPod := func(req, lim core.ResourceList, tweaks ...podtest.Tweak) *core.Pod {
return podtest.MakePod("pod", append(tweaks,
podtest.SetContainers(
@@ -25479,6 +25481,23 @@ func TestValidatePodResize(t *testing.T) {
)...)
}
mkPodWithInitContainers := func(req, lim core.ResourceList, restartPolicy core.ContainerRestartPolicy, tweaks ...podtest.Tweak) *core.Pod {
return podtest.MakePod("pod", append(tweaks,
podtest.SetInitContainers(
podtest.MakeContainer(
"container",
podtest.SetContainerResources(
core.ResourceRequirements{
Requests: req,
Limits: lim,
},
),
podtest.SetContainerRestartPolicy(restartPolicy),
),
),
)...)
}
tests := []struct {
test string
old *core.Pod
@@ -25672,20 +25691,10 @@ func TestValidatePodResize(t *testing.T) {
old: mkPod(getResources("100m", "100Mi", "", ""), core.ResourceList{}),
new: mkPod(getResources("100m", "100Mi", "", ""), getResources("200m", "200Mi", "", "")),
err: "",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove limits",
old: mkPod(getResources("100m", "100Mi", "", ""), getResources("200m", "200Mi", "", "")),
new: mkPod(getResources("100m", "100Mi", "", ""), core.ResourceList{}),
err: "",
}, {
test: "Pod QoS unchanged, burstable -> burstable, add requests",
old: mkPod(core.ResourceList{}, getResources("200m", "500Mi", "1Gi", "")),
new: mkPod(getResources("300m", "", "", ""), getResources("400m", "", "1Gi", "")),
err: "",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove requests",
old: mkPod(getResources("100m", "200Mi", "", ""), getResources("200m", "300Mi", "2Gi", "")),
new: mkPod(core.ResourceList{}, getResources("400m", "500Mi", "2Gi", "")),
new: mkPod(getResources("300m", "", "", ""), getResources("400m", "500Mi", "1Gi", "")),
err: "",
}, {
test: "Pod QoS change, guaranteed -> burstable",
@@ -25717,6 +25726,71 @@ func TestValidatePodResize(t *testing.T) {
old: mkPod(core.ResourceList{}, getResources("100m", "0", "1Gi", ""), podtest.SetOS(core.Windows)),
new: mkPod(core.ResourceList{}, getResources("200m", "0", "1Gi", ""), podtest.SetOS(core.Windows)),
err: "Forbidden: windows pods cannot be resized",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu limit",
old: mkPod(core.ResourceList{}, getResources("100m", "100Mi", "", "")),
new: mkPod(core.ResourceList{}, getResources("", "100Mi", "", "")),
err: "spec.containers[0].resources.limits: Forbidden: resource limits cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove memory limit",
old: mkPod(core.ResourceList{}, getResources("100m", "100Mi", "", "")),
new: mkPod(core.ResourceList{}, getResources("100m", "", "", "")),
err: "spec.containers[0].resources.limits: Forbidden: resource limits cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu request",
old: mkPod(getResources("100m", "100Mi", "", ""), core.ResourceList{}),
new: mkPod(getResources("", "100Mi", "", ""), core.ResourceList{}),
err: "spec.containers[0].resources.requests: Forbidden: resource requests cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove memory request",
old: mkPod(getResources("100m", "100Mi", "", ""), core.ResourceList{}),
new: mkPod(getResources("100m", "", "", ""), core.ResourceList{}),
err: "spec.containers[0].resources.requests: Forbidden: resource requests cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu and memory limits",
old: mkPod(getResources("100m", "", "", ""), getResources("100m", "100Mi", "", "")),
new: mkPod(getResources("100m", "", "", ""), core.ResourceList{}),
err: "spec.containers[0].resources.limits: Forbidden: resource limits cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu and memory requests",
old: mkPod(getResources("100m", "100Mi", "", ""), getResources("100m", "", "", "")),
new: mkPod(core.ResourceList{}, getResources("100m", "", "", "")),
err: "spec.containers[0].resources.requests: Forbidden: resource requests cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu limit",
old: mkPodWithInitContainers(core.ResourceList{}, getResources("100m", "100Mi", "", ""), core.ContainerRestartPolicyAlways),
new: mkPodWithInitContainers(core.ResourceList{}, getResources("", "100Mi", "", ""), core.ContainerRestartPolicyAlways),
err: "spec.initContainers[0].resources.limits: Forbidden: resource limits cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove memory limit",
old: mkPodWithInitContainers(core.ResourceList{}, getResources("100m", "100Mi", "", ""), core.ContainerRestartPolicyAlways),
new: mkPodWithInitContainers(core.ResourceList{}, getResources("100m", "", "", ""), core.ContainerRestartPolicyAlways),
err: "spec.initContainers[0].resources.limits: Forbidden: resource limits cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu request",
old: mkPodWithInitContainers(getResources("100m", "100Mi", "", ""), core.ResourceList{}, core.ContainerRestartPolicyAlways),
new: mkPodWithInitContainers(getResources("", "100Mi", "", ""), core.ResourceList{}, core.ContainerRestartPolicyAlways),
err: "spec.initContainers[0].resources.requests: Forbidden: resource requests cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove memory request",
old: mkPodWithInitContainers(getResources("100m", "100Mi", "", ""), core.ResourceList{}, core.ContainerRestartPolicyAlways),
new: mkPodWithInitContainers(getResources("100m", "", "", ""), core.ResourceList{}, core.ContainerRestartPolicyAlways),
err: "spec.initContainers[0].resources.requests: Forbidden: resource requests cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu and memory limits",
old: mkPodWithInitContainers(getResources("100m", "", "", ""), getResources("100m", "100Mi", "", ""), core.ContainerRestartPolicyAlways),
new: mkPodWithInitContainers(getResources("100m", "", "", ""), core.ResourceList{}, core.ContainerRestartPolicyAlways),
err: "spec.initContainers[0].resources.limits: Forbidden: resource limits cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu and memory requests",
old: mkPodWithInitContainers(getResources("100m", "100Mi", "", ""), getResources("100m", "", "", ""), core.ContainerRestartPolicyAlways),
new: mkPodWithInitContainers(core.ResourceList{}, getResources("100m", "", "", ""), core.ContainerRestartPolicyAlways),
err: "spec.initContainers[0].resources.requests: Forbidden: resource requests cannot be removed",
}, {
test: "Pod QoS unchanged, burstable -> burstable, remove cpu and memory requests",
old: mkPodWithInitContainers(getResources("100m", "100Mi", "", ""), getResources("100m", "", "", ""), ""),
new: mkPodWithInitContainers(core.ResourceList{}, getResources("100m", "", "", ""), ""),
err: "spec: Forbidden: only cpu and memory resources are mutable",
},
{
test: "Pod with nil Resource field in Status",