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Further reduce cluster-autoscaler e2e flakiness

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Add pdbs for additional kube-system pod, move adding
pdbs to separate function, as it will need to be reused
in new tests we're working on.
This commit is contained in:
Maciej Pytel 2017-06-20 16:37:20 +02:00
parent 46fe7f062b
commit 7072a50aea
1 changed files with 49 additions and 26 deletions
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75
test/e2e/autoscaling/cluster_size_autoscaling.go
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@ -346,32 +346,9 @@ var _ = framework.KubeDescribe("Cluster size autoscaling [Slow]", func() {
})
simpleScaleDownTest := func(unready int) {
// This is a temporary fix to allow CA to migrate some kube-system pods
// TODO: Remove this when the PDB is added for those components
By("Create PodDisruptionBudgets for kube-system components, so they can be migrated if required")
pdbsToAdd := []string{"kube-dns-autoscaler", "kube-dns"}
for _, pdbLabel := range pdbsToAdd {
By(fmt.Sprintf("Create PodDisruptionBudget for %v", pdbLabel))
labelMap := map[string]string{"k8s-app": pdbLabel}
pdbName := fmt.Sprintf("test-pdb-for-%v", pdbLabel)
minAvailable := intstr.FromInt(1)
pdb := &policy.PodDisruptionBudget{
ObjectMeta: metav1.ObjectMeta{
Name: pdbName,
Namespace: "kube-system",
},
Spec: policy.PodDisruptionBudgetSpec{
Selector: &metav1.LabelSelector{MatchLabels: labelMap},
MinAvailable: &minAvailable,
},
}
_, err := f.StagingClient.Policy().PodDisruptionBudgets("kube-system").Create(pdb)
defer func() {
f.StagingClient.Policy().PodDisruptionBudgets("kube-system").Delete(pdbName, &metav1.DeleteOptions{})
}()
framework.ExpectNoError(err)
}
cleanup, err := addKubeSystemPdbs(f)
defer cleanup()
framework.ExpectNoError(err)
By("Manually increase cluster size")
increasedSize := 0
@ -1081,3 +1058,49 @@ func waitForScaleUpStatus(c clientset.Interface, expected string, timeout time.D
}
return nil, fmt.Errorf("ScaleUp status did not reach expected value: %v", expected)
}
// This is a temporary fix to allow CA to migrate some kube-system pods
// TODO: Remove this when the PDB is added for those components
func addKubeSystemPdbs(f *framework.Framework) (func(), error) {
By("Create PodDisruptionBudgets for kube-system components, so they can be migrated if required")
newPdbs := make([]string, 0)
cleanup := func() {
for _, newPdbName := range newPdbs {
f.StagingClient.Policy().PodDisruptionBudgets("kube-system").Delete(newPdbName, &metav1.DeleteOptions{})
}
}
type pdbInfo struct {
label string
min_available int
}
pdbsToAdd := []pdbInfo{
{label: "kube-dns-autoscaler", min_available: 1},
{label: "kube-dns", min_available: 1},
{label: "event-exporter", min_available: 0},
}
for _, pdbData := range pdbsToAdd {
By(fmt.Sprintf("Create PodDisruptionBudget for %v", pdbData.label))
labelMap := map[string]string{"k8s-app": pdbData.label}
pdbName := fmt.Sprintf("test-pdb-for-%v", pdbData.label)
minAvailable := intstr.FromInt(pdbData.min_available)
pdb := &policy.PodDisruptionBudget{
ObjectMeta: metav1.ObjectMeta{
Name: pdbName,
Namespace: "kube-system",
},
Spec: policy.PodDisruptionBudgetSpec{
Selector: &metav1.LabelSelector{MatchLabels: labelMap},
MinAvailable: &minAvailable,
},
}
_, err := f.StagingClient.Policy().PodDisruptionBudgets("kube-system").Create(pdb)
newPdbs = append(newPdbs, pdbName)
if err != nil {
return cleanup, err
}
}
return cleanup, nil
}