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Logarithmic timestamp comparison for ReplicSet downscaling

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Change-Id: I0657ea0ce41b98fdee1a5307b5826a10deaff98c
This commit is contained in:
Aldo Culquicondor
2020-11-26 16:34:21 -05:00
committed by Mike Dame
parent 336bbae82c
commit a8d105ab72
5 changed files with 142 additions and 23 deletions
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42
test/integration/replicationcontroller/replicationcontroller_test.go
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@@ -25,19 +25,23 @@ import (
"time"
"k8s.io/api/core/v1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/apimachinery/pkg/util/wait"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/client-go/informers"
clientset "k8s.io/client-go/kubernetes"
typedv1 "k8s.io/client-go/kubernetes/typed/core/v1"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/retry"
featuregatetesting "k8s.io/component-base/featuregate/testing"
podutil "k8s.io/kubernetes/pkg/api/v1/pod"
"k8s.io/kubernetes/pkg/controller/replication"
"k8s.io/kubernetes/pkg/features"
"k8s.io/kubernetes/test/integration/framework"
)
@@ -491,6 +495,44 @@ func TestSpecReplicasChange(t *testing.T) {
}
}
func TestLogarithmicScaleDown(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.LogarithmicScaleDown, true)()
s, closeFn, rm, informers, c := rmSetup(t)
defer closeFn()
ns := framework.CreateTestingNamespace("test-spec-replicas-change", s, t)
defer framework.DeleteTestingNamespace(ns, s, t)
stopCh := runControllerAndInformers(t, rm, informers, 0)
defer close(stopCh)
rc := newRC("rc", ns.Name, 2)
rcs, _ := createRCsPods(t, c, []*v1.ReplicationController{rc}, []*v1.Pod{})
rc = rcs[0]
waitRCStable(t, c, rc)
// get list of pods in the cluster
pods, err := c.CoreV1().Pods(ns.Name).List(context.TODO(), metav1.ListOptions{})
if err != nil {
t.Fatalf("failed to get pods in namespace %s: %+v", ns.Name, err)
}
// Wait 10 seconds and scale up, the new pod should be in a new logarithmic rank from the first 2
time.Sleep(10 * time.Second)
scaleRC(t, c, rc, 3)
// scale back down, and confirm that the pods left in the namespace are the original ones
// (meaning the 3rd one was deleted)
scaleRC(t, c, rc, 2)
newPods, err := c.CoreV1().Pods(ns.Name).List(context.TODO(), metav1.ListOptions{})
if err != nil {
t.Fatalf("failed to get pods in namespace %s: %+v", ns.Name, err)
}
if !apiequality.Semantic.DeepEqual(pods.Items, newPods.Items) {
t.Fatalf("expected pods %+v, got %+v", pods.Items, newPods.Items)
}
}
func TestDeletingAndFailedPods(t *testing.T) {
s, closeFn, rm, informers, c := rmSetup(t)
defer closeFn()