// This test verifies that max-pods flag works as advertised. It assumes that cluster add-on pods stay stable
// and cannot be run in parallel with any other test that touches Nodes or Pods. It is so because to check
// if max-pods is working we need to fully saturate the cluster and keep it in this state for few seconds.
//
// Slow PR #13315 (8 min)
It("validates MaxPods limit number of pods that are allowed to run [Slow]", func() {
totalPodCapacity = 0
for _, node := range nodeList.Items {
framework.Logf("Node: %v", node)
podCapacity, found := node.Status.Capacity["pods"]
Expect(found).To(Equal(true))
totalPodCapacity += podCapacity.Value()
}
currentlyScheduledPods := framework.WaitForStableCluster(c, masterNodes)
podsNeededForSaturation := int(totalPodCapacity) - currentlyScheduledPods
By(fmt.Sprintf("Starting additional %v Pods to fully saturate the cluster max pods and trying to start another one", podsNeededForSaturation))
// As the pods are distributed randomly among nodes,
// it can easily happen that all nodes are satured
// and there is no need to create additional pods.
// StartPods requires at least one pod to replicate.
if podsNeededForSaturation > 0 {
framework.ExpectNoError(testutils.StartPods(c, podsNeededForSaturation, ns, "maxp",
*initPausePod(f, pausePodConfig{
Name: "",
Labels: map[string]string{"name": ""},
}), true, framework.Logf))
}
By("Removing additional replication controllers if any")
for i := 1; i <= nodeCount; i++ {
name := additionalPodsPrefix + "-" + strconv.Itoa(i)
c.ReplicationControllers(ns).Delete(name, nil)
}
})
}
// Calculate total number of pods from each node's max-pod
It("[Feature:ManualPerformance] should allow running maximum capacity pods on nodes", func() {
totalPods = 0
for _, n := range nodes.Items {
totalPods += int(n.Status.Capacity.Pods().Value())
}
totalPods -= framework.WaitForStableCluster(c, masters)
fileHndl, err := os.Create(fmt.Sprintf(framework.TestContext.OutputDir+"/%s/pod_states.csv", uuid))
framework.ExpectNoError(err)
defer fileHndl.Close()
rcCnt := 1
RCConfigs := make([]framework.RCConfig, rcCnt)
podsPerRC := int(totalPods / rcCnt)
for i := 0; i < rcCnt; i++ {
if i == rcCnt-1 {
podsPerRC += int(math.Mod(float64(totalPods), float64(rcCnt)))
}
RCName = "density" + strconv.Itoa(totalPods) + "-" + strconv.Itoa(i) + "-" + uuid
RCConfigs[i] = framework.RCConfig{Client: c,
Image: "gcr.io/google_containers/pause-amd64:3.0",
Name: RCName,