Expect(nodeCount).Should(Equal(sum))
if framework.ProviderIs("gke") {
val, err := isAutoscalerEnabled(3)
framework.ExpectNoError(err)
if !val {
err = enableAutoscaler("default-pool", 3, 5)
framework.ExpectNoError(err)
}
}
})
AfterEach(func() {
By(fmt.Sprintf("Restoring initial size of the cluster"))
setMigSizes(originalSizes)
framework.ExpectNoError(framework.WaitForClusterSize(c, nodeCount, scaleDownTimeout))
})
It("shouldn't increase cluster size if pending pod is too large [Feature:ClusterSizeAutoscalingScaleUp]", func() {
By("Creating unschedulable pod")
ReserveMemory(f, "memory-reservation", 1, memCapacityMb, false)
defer framework.DeleteRCAndPods(f.ClientSet, f.InternalClientset, f.Namespace.Name, "memory-reservation")
By("Waiting for scale up hoping it won't happen")
// Verfiy, that the appropreate event was generated.
eventFound := false
EventsLoop:
for start := time.Now(); time.Since(start) < scaleUpTimeout; time.Sleep(20 * time.Second) {
By("Waiting for NotTriggerScaleUp event")
events, err := f.ClientSet.Core().Events(f.Namespace.Name).List(v1.ListOptions{})
framework.ExpectNoError(err)
// In GKE, our current tunneling setup has the potential to hold on to a broken tunnel (from a
// rebooted/deleted node) for up to 5 minutes before all tunnels are dropped and recreated.
// Most tests make use of some proxy feature to verify functionality. So, if a reboot test runs
// right before a test that tries to get logs, for example, we may get unlucky and try to use a
// closed tunnel to a node that was recently rebooted. There's no good way to framework.Poll for proxies
// being closed, so we sleep.
//
// TODO(cjcullen) reduce this sleep (#19314)
if framework.ProviderIs("gke") {
By("waiting 5 minutes for all dead tunnels to be dropped")
time.Sleep(5 * time.Minute)
}
if err := WaitForGroupSize(group, int32(framework.TestContext.CloudConfig.NumNodes)); err != nil {
framework.Failf("Couldn't restore the original node instance group size: %v", err)
}
if err := framework.WaitForClusterSize(c, framework.TestContext.CloudConfig.NumNodes, 10*time.Minute); err != nil {
framework.Failf("Couldn't restore the original cluster size: %v", err)
}
// Many e2e tests assume that the cluster is fully healthy before they start. Wait until
// the cluster is restored to health.
By("waiting for system pods to successfully restart")
err := framework.WaitForPodsRunningReady(c, api.NamespaceSystem, systemPodsNo, framework.PodReadyBeforeTimeout, ignoreLabels)
Expect(err).NotTo(HaveOccurred())
By("waiting for image prepulling pods to complete")
framework.WaitForPodsSuccess(c, api.NamespaceSystem, framework.ImagePullerLabels, imagePrePullingTimeout)
})
It("should be able to delete nodes", func() {
// Create a replication controller for a service that serves its hostname.
// The source for the Docker container kubernetes/serve_hostname is in contrib/for-demos/serve_hostname
name := "my-hostname-delete-node"
By("Wait for kube-dns scaled to expected number")
getExpectReplicasLinear = getExpectReplicasFuncLinear(c, &DNSParams_1)
Expect(waitForDNSReplicasSatisfied(c, getExpectReplicasLinear, DNSdefaultTimeout)).NotTo(HaveOccurred())
By("Replace the dns autoscaling parameters with another testing parameters")
err = updateDNSScalingConfigMap(c, packDNSScalingConfigMap(packLinearParams(&DNSParams_3)))
Expect(err).NotTo(HaveOccurred())
By("Wait for kube-dns scaled to expected number")
getExpectReplicasLinear = getExpectReplicasFuncLinear(c, &DNSParams_3)
Expect(waitForDNSReplicasSatisfied(c, getExpectReplicasLinear, DNSdefaultTimeout)).NotTo(HaveOccurred())
By("Restoring cluster size")
setMigSizes(originalSizes)
Expect(framework.WaitForClusterSize(c, sum, scaleDownTimeout)).NotTo(HaveOccurred())
By("Wait for kube-dns scaled to expected number")
Expect(waitForDNSReplicasSatisfied(c, getExpectReplicasLinear, DNSdefaultTimeout)).NotTo(HaveOccurred())
})
It("kube-dns-autoscaler should scale kube-dns pods in both nonfaulty and faulty scenarios", func() {
By("Replace the dns autoscaling parameters with testing parameters")
err := updateDNSScalingConfigMap(c, packDNSScalingConfigMap(packLinearParams(&DNSParams_1)))
Expect(err).NotTo(HaveOccurred())
defer func() {
By("Restoring intial dns autoscaling parameters")
Expect(updateDNSScalingConfigMap(c, packDNSScalingConfigMap(previousParams))).NotTo(HaveOccurred())
}()
By("Wait for kube-dns scaled to expected number")
By("Manually increase cluster size")
increasedSize := 0
increasedSizes := make(map[string]int)
for key, val := range originalSizes {
increasedSizes[key] = val + 1
increasedSize += increasedSizes[key]
}
setMigSizes(increasedSizes)
ExpectNoError(WaitForClusterSizeFunc(c,
func(size int) bool { return size == increasedSize }, DNSscaleUpTimeout))
By("Wait for kube-dns scaled to expected number")
ExpectNoError(waitForDNSReplicasSatisfied(c, increasedSize, DNSdefaultTimeout))
By("Restoring cluster size")
setMigSizes(originalSizes)
framework.ExpectNoError(framework.WaitForClusterSize(c, nodeCount, DNSscaleDownTimeout))
By("Wait for kube-dns scaled to expected number")
ExpectNoError(waitForDNSReplicasSatisfied(c, nodeCount, DNSdefaultTimeout))
})
It("kube-dns-autoscaler should scale kube-dns pods in both nonfaulty and faulty scenarios", func() {
By("--- Scenario: should scale kube-dns based on changed parameters ---")
By("Replace the dns autoscaling parameters with the second testing parameters")
ExpectNoError(updateDNSScalingConfigMap(c, packDNSScalingConfigMap(DNSParams_2)))
By("Wait for kube-dns scaled to expected number")
ExpectNoError(waitForDNSReplicasSatisfied(c, int(math.Ceil(float64(nodeCount)/2.0)), DNSdefaultTimeout))
By("--- Scenario: should re-create scaling parameters with default value when parameters got deleted ---")
By("Delete the ConfigMap for autoscaler")
err := deleteDNSScalingConfigMap(c)
cpu := nodes.Items[0].Status.Capacity[api.ResourceCPU]
mem := nodes.Items[0].Status.Capacity[api.ResourceMemory]
coresPerNode = int((&cpu).MilliValue() / 1000)
memCapacityMb = int((&mem).Value() / 1024 / 1024)
})
AfterEach(func() {
cleanUpAutoscaler()
})
It("Should scale cluster size based on cpu utilization", func() {
setUpAutoscaler("cpu/node_utilization", 0.4, nodeCount, nodeCount+1)
// Consume 50% CPU
rcs := createConsumingRCs(f, "cpu-utilization", nodeCount*coresPerNode, 500, 0)
err := framework.WaitForClusterSize(f.Client, nodeCount+1, scaleUpTimeout)
for _, rc := range rcs {
rc.CleanUp()
}
framework.ExpectNoError(err)
framework.ExpectNoError(framework.WaitForClusterSize(f.Client, nodeCount, scaleDownTimeout))
})
It("Should scale cluster size based on cpu reservation", func() {
setUpAutoscaler("cpu/node_reservation", 0.5, nodeCount, nodeCount+1)
ReserveCpu(f, "cpu-reservation", 600*nodeCount*coresPerNode)
framework.ExpectNoError(framework.WaitForClusterSize(f.Client, nodeCount+1, scaleUpTimeout))
framework.ExpectNoError(framework.DeleteRC(f.Client, f.Namespace.Name, "cpu-reservation"))
nodes := framework.GetReadySchedulableNodesOrDie(f.Client)
nodeCount = len(nodes.Items)
Expect(nodeCount).NotTo(BeZero())
cpu := nodes.Items[0].Status.Capacity[api.ResourceCPU]
mem := nodes.Items[0].Status.Capacity[api.ResourceMemory]
coresPerNode = int((&cpu).MilliValue() / 1000)
memCapacityMb = int((&mem).Value() / 1024 / 1024)
})
It("Should correctly handle pending pods", func() {
By("Too large pending pod does not increase cluster size")
ReserveMemory(f, "memory-reservation", 1, memCapacityMb, false)
// Verify, that cluster size is not changed.
// TODO: find a better way of verification that the cluster size will remain unchanged.
time.Sleep(scaleTimeout)
framework.ExpectNoError(framework.WaitForClusterSize(f.Client, nodeCount, scaleTimeout))
framework.ExpectNoError(framework.DeleteRC(f.Client, f.Namespace.Name, "memory-reservation"))
framework.ExpectNoError(framework.WaitForClusterSize(f.Client, nodeCount, scaleTimeout))
By("Small pending pods increase cluster size")
ReserveMemory(f, "memory-reservation", 100, nodeCount*memCapacityMb, false)
// Verify, that cluster size is increased
framework.ExpectNoError(framework.WaitForClusterSize(f.Client, nodeCount+1, scaleTimeout))
framework.ExpectNoError(framework.DeleteRC(f.Client, f.Namespace.Name, "memory-reservation"))
// TODO(jsz): Disable the line bellow when scale down is implemented.
framework.ExpectNoError(ResizeGroup(int32(nodeCount)))
framework.ExpectNoError(framework.WaitForClusterSize(f.Client, nodeCount, scaleTimeout))
By("Handling node port pods")
CreateHostPortPods(f, "host-port", nodeCount+2, false)
