Merge pull request #11685 from piosz/autoscaling_e2e

Added cluster size autoscaling e2e test

test/e2e/autoscaling.go

@@ -0,0 +1,162 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package e2e
+
+import (
+	"fmt"
+	"os/exec"
+	"time"
+
+	. "github.com/onsi/ginkgo"
+)
+
+var _ = Describe("Autoscaling", func() {
+	f := NewFramework("autoscaling")
+
+	BeforeEach(func() {
+		// Ensure cluster size is equal to 1.
+		expectNoError(waitForClusterSize(f.Client, 1))
+	})
+
+	AfterEach(func() {
+		cleanUpAutoscaler()
+	})
+
+	It("[Skipped] [Autoscaling] should scale cluster size based on cpu utilization", func() {
+		setUpAutoscaler("cpu/node_utilization", 0.8, 1, 10)
+
+		ConsumeCpu(f, "cpu-utilization", 1)
+		expectNoError(waitForClusterSize(f.Client, 2))
+
+		StopConsuming(f, "cpu-utilization")
+		expectNoError(waitForClusterSize(f.Client, 1))
+	})
+
+	It("[Skipped] [Autoscaling] should scale cluster size based on cpu reservation", func() {
+		setUpAutoscaler("cpu/node_reservation", 0.7, 1, 10)
+
+		ReserveCpu(f, "cpu-reservation", 800)
+		expectNoError(waitForClusterSize(f.Client, 2))
+
+		StopConsuming(f, "cpu-reservation")
+		expectNoError(waitForClusterSize(f.Client, 1))
+	})
+
+	It("[Skipped] [Autoscaling] should scale cluster size based on memory utilization", func() {
+		setUpAutoscaler("memory/node_utilization", 0.5, 1, 10)
+
+		ConsumeMemory(f, "memory-utilization", 2)
+		expectNoError(waitForClusterSize(f.Client, 2))
+
+		StopConsuming(f, "memory-utilization")
+		expectNoError(waitForClusterSize(f.Client, 1))
+	})
+
+	It("[Skipped] [Autoscaling] should scale cluster size based on memory reservation", func() {
+		setUpAutoscaler("memory/node_reservation", 0.5, 1, 10)
+
+		ReserveMemory(f, "memory-reservation", 2)
+		expectNoError(waitForClusterSize(f.Client, 2))
+
+		StopConsuming(f, "memory-reservation")
+		expectNoError(waitForClusterSize(f.Client, 1))
+	})
+})
+
+func setUpAutoscaler(metric string, target float64, min, max int64) {
+	// TODO integrate with kube-up.sh script once it will support autoscaler setup.
+	By("Setting up autoscaler to scale based on " + metric)
+	_, err := exec.Command("gcloud", "preview", "autoscaler",
+		"--zone="+testContext.CloudConfig.Zone,
+		"create", "e2e-test-autoscaler",
+		"--project="+testContext.CloudConfig.ProjectID,
+		"--target="+testContext.CloudConfig.NodeInstanceGroup,
+		"--custom-metric=custom.cloudmonitoring.googleapis.com/kubernetes.io/"+metric,
+		fmt.Sprintf("--target-custom-metric-utilization=%v", target),
+		"--custom-metric-utilization-target-type=GAUGE",
+		fmt.Sprintf("--min-num-replicas=%v", min),
+		fmt.Sprintf("--max-num-replicas=%v", max),
+	).CombinedOutput()
+	expectNoError(err)
+}
+
+func cleanUpAutoscaler() {
+	By("Removing autoscaler")
+	_, err := exec.Command("gcloud", "preview", "autoscaler", "--zone="+testContext.CloudConfig.Zone, "delete", "e2e-test-autoscaler").CombinedOutput()
+	expectNoError(err)
+}
+
+func ConsumeCpu(f *Framework, id string, cores int) {
+	By(fmt.Sprintf("Running RC which consumes %v cores", cores))
+	config := &RCConfig{
+		Client:    f.Client,
+		Name:      id,
+		Namespace: f.Namespace.Name,
+		Timeout:   10 * time.Minute,
+		Image:     "jess/stress",
+		Command:   []string{"stress", "-c", "1"},
+		Replicas:  cores,
+	}
+	expectNoError(RunRC(*config))
+}
+
+func ConsumeMemory(f *Framework, id string, gigabytes int) {
+	By(fmt.Sprintf("Running RC which consumes %v GB of memory", gigabytes))
+	config := &RCConfig{
+		Client:    f.Client,
+		Name:      id,
+		Namespace: f.Namespace.Name,
+		Timeout:   10 * time.Minute,
+		Image:     "jess/stress",
+		Command:   []string{"stress", "-m", "1"},
+		Replicas:  4 * gigabytes,
+	}
+	expectNoError(RunRC(*config))
+}
+
+func ReserveCpu(f *Framework, id string, millicores int) {
+	By(fmt.Sprintf("Running RC which reserves %v millicores", millicores))
+	config := &RCConfig{
+		Client:    f.Client,
+		Name:      id,
+		Namespace: f.Namespace.Name,
+		Timeout:   10 * time.Minute,
+		Image:     "gcr.io/google_containers/pause",
+		Replicas:  millicores / 100,
+		CpuLimit:  100,
+	}
+	expectNoError(RunRC(*config))
+}
+
+func ReserveMemory(f *Framework, id string, gigabytes int) {
+	By(fmt.Sprintf("Running RC which reserves %v GB of memory", gigabytes))
+	config := &RCConfig{
+		Client:    f.Client,
+		Name:      id,
+		Namespace: f.Namespace.Name,
+		Timeout:   10 * time.Minute,
+		Image:     "gcr.io/google_containers/pause",
+		Replicas:  5 * gigabytes,
+		MemLimit:  200 * 1024 * 1024,
+	}
+	expectNoError(RunRC(*config))
+}
+
+func StopConsuming(f *Framework, id string) {
+	By("Stopping RC " + id)
+	expectNoError(DeleteRC(f.Client, f.Namespace.Name, id))
+}

test/e2e/resize_nodes.go

@@ -119,12 +119,7 @@ func waitForGroupSize(size int) error {
 }
 
 func waitForClusterSize(c *client.Client, size int) error {
-	timeout := 4 * time.Minute
-	if providerIs("aws") {
-		// AWS is not as fast as gce/gke at having nodes come online
-		timeout = 10 * time.Minute
-	}
-
+	timeout := 10 * time.Minute
 	for start := time.Now(); time.Since(start) < timeout; time.Sleep(20 * time.Second) {
 		nodes, err := c.Nodes().List(labels.Everything(), fields.Everything())
 		if err != nil {

test/e2e/util.go

@@ -34,6 +34,7 @@ import (
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	apierrs "github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/resource"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client/cache"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client/clientcmd"
@@ -166,6 +167,8 @@ type RCConfig struct {
 	Timeout       time.Duration
 	PodStatusFile *os.File
 	Replicas      int
+	CpuLimit      int64 // millicores
+	MemLimit      int64 // bytes
 
 	// Env vars, set the same for every pod.
 	Env map[string]string
@@ -1071,6 +1074,16 @@ func RunRC(config RCConfig) error {
 			c.Ports = append(c.Ports, api.ContainerPort{Name: k, ContainerPort: v})
 		}
 	}
+	if config.CpuLimit > 0 || config.MemLimit > 0 {
+		rc.Spec.Template.Spec.Containers[0].Resources.Limits = api.ResourceList{}
+	}
+	if config.CpuLimit > 0 {
+		rc.Spec.Template.Spec.Containers[0].Resources.Limits[api.ResourceCPU] = *resource.NewMilliQuantity(config.CpuLimit, resource.DecimalSI)
+	}
+	if config.MemLimit > 0 {
+		rc.Spec.Template.Spec.Containers[0].Resources.Limits[api.ResourceMemory] = *resource.NewQuantity(config.MemLimit, resource.DecimalSI)
+	}
+
 	_, err := config.Client.ReplicationControllers(config.Namespace).Create(rc)
 	if err != nil {
 		return fmt.Errorf("Error creating replication controller: %v", err)