Add e2e test monitoring current container resource usage with updated

hack/jenkins/e2e.sh

@@ -95,7 +95,9 @@ GCE_DEFAULT_SKIP_TESTS=(
 
 # The following tests are known to be flaky, and are thus run only in their own
 # -flaky- build variants.
-GCE_FLAKY_TESTS=()
+GCE_FLAKY_TESTS=(
+    "ResourceUsage"
+    )
 
 # Tests which are not able to be run in parallel.
 GCE_PARALLEL_SKIP_TESTS=(
@@ -105,6 +107,7 @@ GCE_PARALLEL_SKIP_TESTS=(
     "Nodes\sNetwork"
     "Nodes\sResize"
     "MaxPods"
+    "ResourceUsage"
     "SchedulerPredicates"
     "Services.*restarting"
     "Shell.*services"

test/e2e/kubelet_stats.go

@@ -195,6 +195,10 @@ type containerResourceUsage struct {
 	CPUInterval time.Duration
 }
 
+func (r *containerResourceUsage) isStrictlyGreaterThan(rhs *containerResourceUsage) bool {
+	return r.CPUUsageInCores > rhs.CPUUsageInCores && r.MemoryUsageInBytes > rhs.MemoryUsageInBytes && r.MemoryWorkingSetInBytes > rhs.MemoryWorkingSetInBytes
+}
+
 // getOneTimeResourceUsageOnNode queries the node's /stats/container endpoint
 // and returns the resource usage of targetContainers for the past
 // cpuInterval.

test/e2e/monitor_resources.go

+/*
+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 (
+	"time"
+
+	"k8s.io/kubernetes/pkg/client"
+	"k8s.io/kubernetes/pkg/fields"
+	"k8s.io/kubernetes/pkg/labels"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+const datapointAmount = 5
+
+type resourceUsagePerContainer map[string]*containerResourceUsage
+
+var systemContainers = []string{"/docker-daemon", "/kubelet", "/kube-proxy", "/system"}
+
+//TODO tweak those values.
+var allowedUsage = resourceUsagePerContainer{
+	"/docker-daemon": &containerResourceUsage{
+		CPUUsageInCores:         0.07,
+		MemoryUsageInBytes:      4500000000,
+		MemoryWorkingSetInBytes: 1500000000,
+	},
+	"/kubelet": &containerResourceUsage{
+		CPUUsageInCores:         0.1,
+		MemoryUsageInBytes:      150000000,
+		MemoryWorkingSetInBytes: 150000000,
+	},
+	"/kube-proxy": &containerResourceUsage{
+		CPUUsageInCores:         0.02,
+		MemoryUsageInBytes:      12000000,
+		MemoryWorkingSetInBytes: 12000000,
+	},
+	"/system": &containerResourceUsage{
+		CPUUsageInCores:         0.01,
+		MemoryUsageInBytes:      100000000,
+		MemoryWorkingSetInBytes: 75000000,
+	},
+}
+
+func computeAverage(sliceOfUsages []resourceUsagePerContainer) (result resourceUsagePerContainer) {
+	result = make(resourceUsagePerContainer)
+	for _, container := range systemContainers {
+		result[container] = &containerResourceUsage{}
+	}
+	for _, usage := range sliceOfUsages {
+		for _, container := range systemContainers {
+			singleResult := &containerResourceUsage{
+				CPUUsageInCores:         result[container].CPUUsageInCores + usage[container].CPUUsageInCores,
+				MemoryUsageInBytes:      result[container].MemoryUsageInBytes + usage[container].MemoryUsageInBytes,
+				MemoryWorkingSetInBytes: result[container].MemoryWorkingSetInBytes + usage[container].MemoryWorkingSetInBytes,
+			}
+			result[container] = singleResult
+		}
+	}
+	for _, container := range systemContainers {
+		singleResult := &containerResourceUsage{
+			CPUUsageInCores:         result[container].CPUUsageInCores / float64(len(sliceOfUsages)),
+			MemoryUsageInBytes:      result[container].MemoryUsageInBytes / int64(len(sliceOfUsages)),
+			MemoryWorkingSetInBytes: result[container].MemoryWorkingSetInBytes / int64(len(sliceOfUsages)),
+		}
+		result[container] = singleResult
+	}
+	return
+}
+
+// This tests does nothing except checking current resource usage of containers defained in kubelet_stats systemContainers variable.
+// Test fails if an average container resource consumption over datapointAmount tries exceeds amount defined in allowedUsage.
+var _ = Describe("ResourceUsage", func() {
+	var c *client.Client
+	BeforeEach(func() {
+		var err error
+		c, err = loadClient()
+		expectNoError(err)
+	})
+
+	It("should not exceed expected amount.", func() {
+		By("Getting ResourceConsumption on all nodes")
+		nodeList, err := c.Nodes().List(labels.Everything(), fields.Everything())
+		expectNoError(err)
+
+		resourceUsagePerNode := make(map[string][]resourceUsagePerContainer)
+
+		for i := 0; i < datapointAmount; i++ {
+			for _, node := range nodeList.Items {
+				resourceUsage, err := getOneTimeResourceUsageOnNode(c, node.Name, 5*time.Second)
+				expectNoError(err)
+				resourceUsagePerNode[node.Name] = append(resourceUsagePerNode[node.Name], resourceUsage)
+			}
+			time.Sleep(3 * time.Second)
+		}
+
+		averageResourceUsagePerNode := make(map[string]resourceUsagePerContainer)
+		for _, node := range nodeList.Items {
+			averageResourceUsagePerNode[node.Name] = computeAverage(resourceUsagePerNode[node.Name])
+		}
+
+		violating := make(map[string]resourceUsagePerContainer)
+		for node, usage := range averageResourceUsagePerNode {
+			for container, cUsage := range usage {
+				Logf("%v on %v usage: %#v", container, node, cUsage)
+				if !allowedUsage[container].isStrictlyGreaterThan(cUsage) {
+					violating[node] = usage
+				}
+			}
+		}
+
+		Expect(violating).To(BeEmpty())
+	})
+})