Merge "Identify platform pods based on pod/namespace labels"
This commit is contained in:
Zuul
Gerrit Code Review
commit
c5025a6680
@ -0,0 +1,407 @@
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From 5e86e6319f5e6d0f0a56863a141238b9c4721ceb Mon Sep 17 00:00:00 2001
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From: Boovan Rajendran <boovan.rajendran@windriver.com>
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Date: Mon, 6 May 2024 02:29:04 -0400
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Subject: [PATCH] Identify platform pods based on pod or namespace labels
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Pods with labeled with 'app.starlingx.io/component=platform'
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are identified as 'platform'. These have isolated cpu affinity
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cpuset when cpu-manager 'static' policy is configured.
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For k8s 1.24.4 to identify the pod as 'platform', keep existing
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hardcoded namespace list to support the application that
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have not upgraded yet, from old versions, and also to support
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the new application, which has pod/namespace labels.
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Signed-off-by: Boovan Rajendran <boovan.rajendran@windriver.com>
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---
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pkg/kubelet/cm/cpumanager/policy_static.go | 81 +++++++++-
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.../cm/cpumanager/policy_static_test.go | 147 ++++++++++++++++++
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.../cm/cpumanager/topology_hints_test.go | 3 +
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3 files changed, 229 insertions(+), 2 deletions(-)
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diff --git a/pkg/kubelet/cm/cpumanager/policy_static.go b/pkg/kubelet/cm/cpumanager/policy_static.go
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index 94f18152d5b..286e983ec32 100644
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--- a/pkg/kubelet/cm/cpumanager/policy_static.go
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+++ b/pkg/kubelet/cm/cpumanager/policy_static.go
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@@ -17,11 +17,17 @@ limitations under the License.
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package cpumanager
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import (
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+ "context"
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"fmt"
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"strconv"
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+ k8sclient "k8s.io/client-go/kubernetes"
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+ metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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+ restclient "k8s.io/client-go/rest"
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v1 "k8s.io/api/core/v1"
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+ "k8s.io/client-go/tools/clientcmd"
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"k8s.io/klog/v2"
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+ "k8s.io/kubernetes/cmd/kubeadm/app/constants"
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v1qos "k8s.io/kubernetes/pkg/apis/core/v1/helper/qos"
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"k8s.io/kubernetes/pkg/kubelet/cm/cpumanager/state"
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"k8s.io/kubernetes/pkg/kubelet/cm/cpumanager/topology"
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@@ -41,6 +47,23 @@ const (
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ErrorSMTAlignment = "SMTAlignmentError"
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)
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+// Declared as variables so that they can easily more
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+// overridden during testing
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+type getPodNamespace func(string) (*v1.Namespace, error)
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+type buildFromConfigFlag func(masterUrl string, kubeconfigPath string) (*restclient.Config, error)
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+type isKubeInfraFunc func(pod *v1.Pod) bool
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+
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+var varGetNamespaceObject getPodNamespace
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+var varBuildConfigFromFlags buildFromConfigFlag
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+var varIsKubeInfra isKubeInfraFunc
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+
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+func init() {
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+ varIsKubeInfra = isKubeInfra
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+ varGetNamespaceObject = getPodNamespaceObject
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+ varBuildConfigFromFlags = clientcmd.BuildConfigFromFlags
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+}
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+
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+
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// SMTAlignmentError represents an error due to SMT alignment
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type SMTAlignmentError struct {
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RequestedCPUs int
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@@ -286,7 +309,7 @@ func (p *staticPolicy) updateCPUsToReuse(pod *v1.Pod, container *v1.Container, c
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func (p *staticPolicy) Allocate(s state.State, pod *v1.Pod, container *v1.Container) error {
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// Process infra pods before guaranteed pods
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- if isKubeInfra(pod) {
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+ if varIsKubeInfra(pod) {
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// Container belongs in reserved pool.
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// We don't want to fall through to the p.guaranteedCPUs() clause below so return either nil or error.
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if _, ok := s.GetCPUSet(string(pod.UID), container.Name); ok {
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@@ -451,7 +474,7 @@ func (p *staticPolicy) guaranteedCPUs(pod *v1.Pod, container *v1.Container) int
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return 0
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}
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// Infrastructure pods use reserved CPUs even if they're in the Guaranteed QoS class
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- if isKubeInfra(pod) {
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+ if varIsKubeInfra(pod) {
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return 0
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}
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// Safe downcast to do for all systems with < 2.1 billion CPUs.
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@@ -668,14 +691,68 @@ func (p *staticPolicy) generateCPUTopologyHints(availableCPUs cpuset.CPUSet, reu
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return hints
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}
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+func getPodNamespaceObject(podNamespaceName string) (*v1.Namespace, error) {
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+
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+ kubeConfigPath := constants.GetKubeletKubeConfigPath()
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+ cfg, err := varBuildConfigFromFlags("", kubeConfigPath)
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+ if err != nil {
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+ klog.Error("Failed to build client config from ", kubeConfigPath, err.Error())
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+ return nil, err
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+ }
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+
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+ clientset, err := k8sclient.NewForConfig(cfg)
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+ if err != nil {
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+ klog.Error("Failed to get clientset for KUBECONFIG ", kubeConfigPath, err.Error())
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+ return nil, err
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+ }
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+
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+ namespaceObj, err := clientset.CoreV1().Namespaces().Get(context.TODO(), podNamespaceName, metav1.GetOptions{})
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+ if err != nil {
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+ klog.Error("Error getting namespace object:", err.Error())
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+ return nil, err
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+ }
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+
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+ return namespaceObj, nil
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+
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+}
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+
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// check if a given pod is in a platform infrastructure namespace
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+// or check if a given pod is labelled as platform pod or is in
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+// a namespace labelled as a platform namespace
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func isKubeInfra(pod *v1.Pod) bool {
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+ podName := pod.GetName()
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+ podNamespaceName := pod.GetNamespace()
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for _, namespace := range infraNamespaces {
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if namespace == pod.Namespace {
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+ klog.Infof("Pod %s has %s namespace. Treating as platform pod.", podName , podNamespaceName)
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return true
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}
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}
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+
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+ klog.InfoS("Checking pod ", podName , " for label 'app.starlingx.io/component=platform'.")
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+ podLabels := pod.GetLabels()
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+ val, ok := podLabels["app.starlingx.io/component"]
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+ if (ok && val == "platform") {
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+ klog.InfoS("Pod ", podName, " has 'app.starlingx.io/component=platform' label. Treating as platform pod.")
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+ return true
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+ }
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+
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+ klog.V(4).InfoS("Pod ", podName, " does not have 'app.starlingx.io/component=platform' label. Checking its namespace information...")
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+ namespaceObj, err := varGetNamespaceObject(podNamespaceName)
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+ if err != nil {
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+ return false
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+ }
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+
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+ namespaceLabels := namespaceObj.GetLabels()
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+ val, ok = namespaceLabels["app.starlingx.io/component"]
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+ if ok && val == "platform" {
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+ klog.InfoS("For pod: ", podName, ", its Namespace ", podNamespaceName, " has 'app.starlingx.io/component=platform' label. Treating as platform pod.")
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+ return true
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+ }
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+
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+ klog.InfoS("Neither pod ", podName, " nor its namespace ", podNamespaceName, " has 'app.starlingx.io/component=platform' label. Not treating as platform pod.")
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return false
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+
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}
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// get the isolated CPUs (if any) from the devices associated with a specific container
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diff --git a/pkg/kubelet/cm/cpumanager/policy_static_test.go b/pkg/kubelet/cm/cpumanager/policy_static_test.go
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index d0308556c6d..95ed4122aeb 100644
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--- a/pkg/kubelet/cm/cpumanager/policy_static_test.go
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+++ b/pkg/kubelet/cm/cpumanager/policy_static_test.go
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@@ -17,10 +17,13 @@ limitations under the License.
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package cpumanager
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import (
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+ "errors"
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"fmt"
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"reflect"
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"testing"
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+ metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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+ restclient "k8s.io/client-go/rest"
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v1 "k8s.io/api/core/v1"
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"k8s.io/kubernetes/pkg/kubelet/cm/cpumanager/state"
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"k8s.io/kubernetes/pkg/kubelet/cm/cpumanager/topology"
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@@ -823,6 +826,7 @@ type staticPolicyTestWithResvList struct {
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stAssignments state.ContainerCPUAssignments
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stDefaultCPUSet cpuset.CPUSet
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pod *v1.Pod
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+ isKubeInfraPodfunc isKubeInfraFunc
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expErr error
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expNewErr error
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expCPUAlloc bool
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@@ -894,6 +898,14 @@ func TestStaticPolicyStartWithResvList(t *testing.T) {
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}
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}
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+func fakeIsKubeInfraTrue(pod *v1.Pod) bool {
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+ return true
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+}
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+
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+func fakeIsKubeInfraFalse(pod *v1.Pod) bool {
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+ return false
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+}
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+
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func TestStaticPolicyAddWithResvList(t *testing.T) {
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infraPod := makePod("fakePod", "fakeContainer2", "200m", "200m")
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infraPod.Namespace = "kube-system"
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@@ -907,6 +919,7 @@ func TestStaticPolicyAddWithResvList(t *testing.T) {
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stAssignments: state.ContainerCPUAssignments{},
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stDefaultCPUSet: cpuset.NewCPUSet(1, 2, 3, 4, 5, 6, 7),
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pod: makePod("fakePod", "fakeContainer2", "8000m", "8000m"),
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+ isKubeInfraPodfunc: fakeIsKubeInfraFalse,
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expErr: fmt.Errorf("not enough cpus available to satisfy request"),
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expCPUAlloc: false,
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expCSet: cpuset.NewCPUSet(),
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@@ -920,6 +933,7 @@ func TestStaticPolicyAddWithResvList(t *testing.T) {
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stAssignments: state.ContainerCPUAssignments{},
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stDefaultCPUSet: cpuset.NewCPUSet(2, 3, 4, 5, 6, 7),
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pod: makePod("fakePod", "fakeContainer2", "1000m", "1000m"),
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+ isKubeInfraPodfunc: fakeIsKubeInfraFalse,
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expErr: nil,
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expCPUAlloc: true,
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expCSet: cpuset.NewCPUSet(4), // expect sibling of partial core
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@@ -937,6 +951,7 @@ func TestStaticPolicyAddWithResvList(t *testing.T) {
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},
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stDefaultCPUSet: cpuset.NewCPUSet(0, 1, 4, 5),
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pod: makePod("fakePod", "fakeContainer3", "2000m", "2000m"),
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+ isKubeInfraPodfunc: fakeIsKubeInfraFalse,
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expErr: nil,
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expCPUAlloc: true,
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expCSet: cpuset.NewCPUSet(4, 5),
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@@ -954,6 +969,7 @@ func TestStaticPolicyAddWithResvList(t *testing.T) {
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},
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stDefaultCPUSet: cpuset.NewCPUSet(4, 5),
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pod: infraPod,
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+ isKubeInfraPodfunc: fakeIsKubeInfraTrue,
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expErr: nil,
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expCPUAlloc: true,
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expCSet: cpuset.NewCPUSet(0, 1),
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@@ -971,6 +987,7 @@ func TestStaticPolicyAddWithResvList(t *testing.T) {
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},
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stDefaultCPUSet: cpuset.NewCPUSet(4, 5),
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pod: infraPod,
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+ isKubeInfraPodfunc: fakeIsKubeInfraTrue,
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|
expErr: nil,
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|
expCPUAlloc: true,
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expCSet: cpuset.NewCPUSet(0),
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@@ -987,6 +1004,7 @@ func TestStaticPolicyAddWithResvList(t *testing.T) {
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defaultCPUSet: testCase.stDefaultCPUSet,
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}
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|
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+ varIsKubeInfra = testCase.isKubeInfraPodfunc
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container := &testCase.pod.Spec.Containers[0]
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|
err := policy.Allocate(st, testCase.pod, container)
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if !reflect.DeepEqual(err, testCase.expErr) {
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@@ -1106,3 +1124,132 @@ func TestStaticPolicyOptions(t *testing.T) {
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|
})
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|
}
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|
}
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|
+
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|
+func makePodWithLabels(podLabels map[string]string) *v1.Pod {
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|
+ return &v1.Pod{
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|
+ ObjectMeta: metav1.ObjectMeta{
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|
+ Name: "test-pod",
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|
+ Namespace: "test-namespace",
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|
+ Labels: podLabels,
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|
+ },
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|
+ }
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|
+}
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|
+
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|
+func fakeBuildConfigFromFlags(masterUrl string, kubeconfigPath string) (*restclient.Config, error) {
|
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|
+
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|
+ return &restclient.Config{}, nil
|
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|
+}
|
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|
+
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|
+func fakeBuildConfigFromFlagsError(masterUrl string, kubeconfigPath string) (*restclient.Config, error) {
|
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|
+
|
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|
+ errString := fmt.Sprintf("%s file not found", kubeconfigPath)
|
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|
+ return nil, errors.New(errString)
|
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|
+
|
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|
+}
|
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|
+
|
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|
+func getFakeInfraPodNamespace(_ string) (*v1.Namespace, error) {
|
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|
+
|
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|
+ return &v1.Namespace{
|
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|
+ ObjectMeta: metav1.ObjectMeta{
|
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|
+ Name: "test-namespace",
|
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|
+ Labels: map[string]string{
|
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|
+ "app.starlingx.io/component": "platform",
|
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|
+ },
|
||||||
|
+ }}, nil
|
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|
+}
|
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|
+
|
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|
+func getFakeNonInfraPodNamespace(_ string) (*v1.Namespace, error) {
|
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|
+
|
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|
+ return &v1.Namespace{
|
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|
+ ObjectMeta: metav1.ObjectMeta{
|
||||||
|
+ Name: "test-namespace",
|
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|
+ Labels: map[string]string{
|
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|
+ "fake": "label",
|
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|
+ }}}, nil
|
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|
+
|
||||||
|
+}
|
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|
+
|
||||||
|
+type kubeInfraPodTestCase struct {
|
||||||
|
+ description string
|
||||||
|
+ pod *v1.Pod
|
||||||
|
+ namespaceFunc getPodNamespace
|
||||||
|
+ expectedValue bool
|
||||||
|
+}
|
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|
+
|
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|
+func TestKubeInfraPod(t *testing.T) {
|
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|
+ testCases := []kubeInfraPodTestCase{
|
||||||
|
+ {
|
||||||
|
+ description: "Pod with platform label and namespace with platform label",
|
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|
+ pod: makePodWithLabels(map[string]string{
|
||||||
|
+ "app.starlingx.io/component": "platform",
|
||||||
|
+ }),
|
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|
+ namespaceFunc: getFakeInfraPodNamespace,
|
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|
+ expectedValue: true,
|
||||||
|
+ },
|
||||||
|
+ {
|
||||||
|
+ description: "Pod with platform label and namespace without platform label",
|
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|
+ pod: makePodWithLabels(map[string]string{
|
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|
+ "app.starlingx.io/component": "platform",
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|
+ }),
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|
+ namespaceFunc: getFakeNonInfraPodNamespace,
|
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|
+ expectedValue: true,
|
||||||
|
+
|
||||||
|
+ },
|
||||||
|
+ {
|
||||||
|
+ description: "Pod without platform label and namespace with platform label",
|
||||||
|
+ pod: makePodWithLabels(map[string]string{
|
||||||
|
+ "test": "label",
|
||||||
|
+ }),
|
||||||
|
+ namespaceFunc: getFakeInfraPodNamespace,
|
||||||
|
+ expectedValue: true,
|
||||||
|
+ },
|
||||||
|
+ {
|
||||||
|
+ description: "Pod without platform label and namespace without platform label",
|
||||||
|
+ pod: makePodWithLabels(map[string]string{
|
||||||
|
+ "test": "namespace",
|
||||||
|
+ }),
|
||||||
|
+ namespaceFunc: getFakeNonInfraPodNamespace,
|
||||||
|
+ expectedValue: false,
|
||||||
|
+ },
|
||||||
|
+
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
+ for _, testCase := range testCases {
|
||||||
|
+ t.Run(testCase.description, func(t *testing.T) {
|
||||||
|
+
|
||||||
|
+ varGetNamespaceObject = testCase.namespaceFunc
|
||||||
|
+ varBuildConfigFromFlags = fakeBuildConfigFromFlags
|
||||||
|
+ gotValue := isKubeInfra(testCase.pod)
|
||||||
|
+
|
||||||
|
+ if gotValue != testCase.expectedValue {
|
||||||
|
+ t.Errorf("StaticPolicy isKubeInfraPod() error %v. expected value %v actual value %v",
|
||||||
|
+ testCase.description, testCase.expectedValue, gotValue)
|
||||||
|
+ } else {
|
||||||
|
+ fmt.Printf("StaticPolicy isKubeInfraPod() test successful. : %v ", testCase.description)
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
+ })
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
+ test := kubeInfraPodTestCase{
|
||||||
|
+ description: "Failure reading kubeconfig file",
|
||||||
|
+ pod: makePodWithLabels(map[string]string{
|
||||||
|
+ "test": "namespace",
|
||||||
|
+ }),
|
||||||
|
+ namespaceFunc: getFakeNonInfraPodNamespace,
|
||||||
|
+ expectedValue: false,
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
+ varGetNamespaceObject = getPodNamespaceObject
|
||||||
|
+ varBuildConfigFromFlags = fakeBuildConfigFromFlagsError
|
||||||
|
+
|
||||||
|
+ gotValue := isKubeInfra(test.pod)
|
||||||
|
+
|
||||||
|
+ if gotValue != test.expectedValue {
|
||||||
|
+ t.Errorf("StaticPolicy isKubeInfraPod() error %v. expected value %v actual value %v",
|
||||||
|
+ test.description, test.expectedValue, gotValue)
|
||||||
|
+ } else {
|
||||||
|
+ fmt.Printf("StaticPolicy isKubeInfraPod() test successful. : %v ", test.description)
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
+}
|
||||||
|
diff --git a/pkg/kubelet/cm/cpumanager/topology_hints_test.go b/pkg/kubelet/cm/cpumanager/topology_hints_test.go
|
||||||
|
index 9b8abe77488..b5a0ca41ab1 100644
|
||||||
|
--- a/pkg/kubelet/cm/cpumanager/topology_hints_test.go
|
||||||
|
+++ b/pkg/kubelet/cm/cpumanager/topology_hints_test.go
|
||||||
|
@@ -142,6 +142,7 @@ func TestPodGuaranteedCPUs(t *testing.T) {
|
||||||
|
expectedCPU: 6,
|
||||||
|
},
|
||||||
|
}
|
||||||
|
+ varIsKubeInfra = fakeIsKubeInfraFalse
|
||||||
|
for _, tc := range tcases {
|
||||||
|
requestedCPU := p.podGuaranteedCPUs(tc.pod)
|
||||||
|
|
||||||
|
@@ -184,6 +185,7 @@ func TestGetTopologyHints(t *testing.T) {
|
||||||
|
sourcesReady: &sourcesReadyStub{},
|
||||||
|
}
|
||||||
|
|
||||||
|
+ varIsKubeInfra = fakeIsKubeInfraFalse
|
||||||
|
hints := m.GetTopologyHints(&tc.pod, &tc.container)[string(v1.ResourceCPU)]
|
||||||
|
if len(tc.expectedHints) == 0 && len(hints) == 0 {
|
||||||
|
continue
|
||||||
|
@@ -237,6 +239,7 @@ func TestGetPodTopologyHints(t *testing.T) {
|
||||||
|
sourcesReady: &sourcesReadyStub{},
|
||||||
|
}
|
||||||
|
|
||||||
|
+ varIsKubeInfra = fakeIsKubeInfraFalse
|
||||||
|
podHints := m.GetPodTopologyHints(&tc.pod)[string(v1.ResourceCPU)]
|
||||||
|
if len(tc.expectedHints) == 0 && len(podHints) == 0 {
|
||||||
|
continue
|
||||||
|
--
|
||||||
|
2.25.1
|
||||||
|
|
||||||
@ -14,3 +14,4 @@ kubelet-cpumanager-introduce-concept-of-isolated-CPU.patch
|
|||||||
cpumanager-policy-static-test-refactor.patch
|
cpumanager-policy-static-test-refactor.patch
|
||||||
kubelet-CFS-quota-throttling-for-non-integer-cpulimit.patch
|
kubelet-CFS-quota-throttling-for-non-integer-cpulimit.patch
|
||||||
kubeadm-reduce-UpgradeManifestTimeout.patch
|
kubeadm-reduce-UpgradeManifestTimeout.patch
|
||||||
|
Identify-platform-pods-based-on-pod-or-namespace-labels.patch
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user