231 lines
8.1 KiB
Go
231 lines
8.1 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes Authors.
|
|
|
|
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"
|
|
"strings"
|
|
"time"
|
|
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
|
|
"k8s.io/kubernetes/pkg/util/uuid"
|
|
"k8s.io/kubernetes/test/e2e/framework"
|
|
testutils "k8s.io/kubernetes/test/utils"
|
|
|
|
. "github.com/onsi/ginkgo"
|
|
. "github.com/onsi/gomega"
|
|
)
|
|
|
|
const (
|
|
// Interval to framework.Poll /runningpods on a node
|
|
pollInterval = 1 * time.Second
|
|
// Interval to framework.Poll /stats/container on a node
|
|
containerStatsPollingInterval = 5 * time.Second
|
|
// Maximum number of nodes that we constraint to
|
|
maxNodesToCheck = 10
|
|
)
|
|
|
|
// getPodMatches returns a set of pod names on the given node that matches the
|
|
// podNamePrefix and namespace.
|
|
func getPodMatches(c clientset.Interface, nodeName string, podNamePrefix string, namespace string) sets.String {
|
|
matches := sets.NewString()
|
|
framework.Logf("Checking pods on node %v via /runningpods endpoint", nodeName)
|
|
runningPods, err := framework.GetKubeletPods(c, nodeName)
|
|
if err != nil {
|
|
framework.Logf("Error checking running pods on %v: %v", nodeName, err)
|
|
return matches
|
|
}
|
|
for _, pod := range runningPods.Items {
|
|
if pod.Namespace == namespace && strings.HasPrefix(pod.Name, podNamePrefix) {
|
|
matches.Insert(pod.Name)
|
|
}
|
|
}
|
|
return matches
|
|
}
|
|
|
|
// waitTillNPodsRunningOnNodes polls the /runningpods endpoint on kubelet until
|
|
// it finds targetNumPods pods that match the given criteria (namespace and
|
|
// podNamePrefix). Note that we usually use label selector to filter pods that
|
|
// belong to the same RC. However, we use podNamePrefix with namespace here
|
|
// because pods returned from /runningpods do not contain the original label
|
|
// information; they are reconstructed by examining the container runtime. In
|
|
// the scope of this test, we do not expect pod naming conflicts so
|
|
// podNamePrefix should be sufficient to identify the pods.
|
|
func waitTillNPodsRunningOnNodes(c clientset.Interface, nodeNames sets.String, podNamePrefix string, namespace string, targetNumPods int, timeout time.Duration) error {
|
|
return wait.Poll(pollInterval, timeout, func() (bool, error) {
|
|
matchCh := make(chan sets.String, len(nodeNames))
|
|
for _, item := range nodeNames.List() {
|
|
// Launch a goroutine per node to check the pods running on the nodes.
|
|
nodeName := item
|
|
go func() {
|
|
matchCh <- getPodMatches(c, nodeName, podNamePrefix, namespace)
|
|
}()
|
|
}
|
|
|
|
seen := sets.NewString()
|
|
for i := 0; i < len(nodeNames.List()); i++ {
|
|
seen = seen.Union(<-matchCh)
|
|
}
|
|
if seen.Len() == targetNumPods {
|
|
return true, nil
|
|
}
|
|
framework.Logf("Waiting for %d pods to be running on the node; %d are currently running;", targetNumPods, seen.Len())
|
|
return false, nil
|
|
})
|
|
}
|
|
|
|
// updates labels of nodes given by nodeNames.
|
|
// In case a given label already exists, it overwrites it. If label to remove doesn't exist
|
|
// it silently ignores it.
|
|
// TODO: migrate to use framework.AddOrUpdateLabelOnNode/framework.RemoveLabelOffNode
|
|
func updateNodeLabels(c clientset.Interface, nodeNames sets.String, toAdd, toRemove map[string]string) {
|
|
const maxRetries = 5
|
|
for nodeName := range nodeNames {
|
|
var node *v1.Node
|
|
var err error
|
|
for i := 0; i < maxRetries; i++ {
|
|
node, err = c.Core().Nodes().Get(nodeName, metav1.GetOptions{})
|
|
if err != nil {
|
|
framework.Logf("Error getting node %s: %v", nodeName, err)
|
|
continue
|
|
}
|
|
if toAdd != nil {
|
|
for k, v := range toAdd {
|
|
node.ObjectMeta.Labels[k] = v
|
|
}
|
|
}
|
|
if toRemove != nil {
|
|
for k := range toRemove {
|
|
delete(node.ObjectMeta.Labels, k)
|
|
}
|
|
}
|
|
_, err = c.Core().Nodes().Update(node)
|
|
if err != nil {
|
|
framework.Logf("Error updating node %s: %v", nodeName, err)
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
Expect(err).NotTo(HaveOccurred())
|
|
}
|
|
}
|
|
|
|
var _ = framework.KubeDescribe("kubelet", func() {
|
|
var c clientset.Interface
|
|
var numNodes int
|
|
var nodeNames sets.String
|
|
var nodeLabels map[string]string
|
|
f := framework.NewDefaultFramework("kubelet")
|
|
var resourceMonitor *framework.ResourceMonitor
|
|
|
|
BeforeEach(func() {
|
|
c = f.ClientSet
|
|
// Use node labels to restrict the pods to be assigned only to the
|
|
// nodes we observe initially.
|
|
nodeLabels = make(map[string]string)
|
|
nodeLabels["kubelet_cleanup"] = "true"
|
|
|
|
nodes := framework.GetReadySchedulableNodesOrDie(c)
|
|
numNodes = len(nodes.Items)
|
|
nodeNames = sets.NewString()
|
|
// If there are a lot of nodes, we don't want to use all of them
|
|
// (if there are 1000 nodes in the cluster, starting 10 pods/node
|
|
// will take ~10 minutes today). And there is also deletion phase.
|
|
// Instead, we choose at most 10 nodes.
|
|
if numNodes > maxNodesToCheck {
|
|
numNodes = maxNodesToCheck
|
|
}
|
|
for i := 0; i < numNodes; i++ {
|
|
nodeNames.Insert(nodes.Items[i].Name)
|
|
}
|
|
updateNodeLabels(c, nodeNames, nodeLabels, nil)
|
|
|
|
// Start resourceMonitor only in small clusters.
|
|
if len(nodes.Items) <= maxNodesToCheck {
|
|
resourceMonitor = framework.NewResourceMonitor(f.ClientSet, framework.TargetContainers(), containerStatsPollingInterval)
|
|
resourceMonitor.Start()
|
|
}
|
|
})
|
|
|
|
AfterEach(func() {
|
|
if resourceMonitor != nil {
|
|
resourceMonitor.Stop()
|
|
}
|
|
// If we added labels to nodes in this test, remove them now.
|
|
updateNodeLabels(c, nodeNames, nil, nodeLabels)
|
|
})
|
|
|
|
framework.KubeDescribe("Clean up pods on node", func() {
|
|
type DeleteTest struct {
|
|
podsPerNode int
|
|
timeout time.Duration
|
|
}
|
|
deleteTests := []DeleteTest{
|
|
{podsPerNode: 10, timeout: 1 * time.Minute},
|
|
}
|
|
for _, itArg := range deleteTests {
|
|
name := fmt.Sprintf(
|
|
"kubelet should be able to delete %d pods per node in %v.", itArg.podsPerNode, itArg.timeout)
|
|
It(name, func() {
|
|
totalPods := itArg.podsPerNode * numNodes
|
|
By(fmt.Sprintf("Creating a RC of %d pods and wait until all pods of this RC are running", totalPods))
|
|
rcName := fmt.Sprintf("cleanup%d-%s", totalPods, string(uuid.NewUUID()))
|
|
|
|
Expect(framework.RunRC(testutils.RCConfig{
|
|
Client: f.ClientSet,
|
|
InternalClient: f.InternalClientset,
|
|
Name: rcName,
|
|
Namespace: f.Namespace.Name,
|
|
Image: framework.GetPauseImageName(f.ClientSet),
|
|
Replicas: totalPods,
|
|
NodeSelector: nodeLabels,
|
|
})).NotTo(HaveOccurred())
|
|
// Perform a sanity check so that we know all desired pods are
|
|
// running on the nodes according to kubelet. The timeout is set to
|
|
// only 30 seconds here because framework.RunRC already waited for all pods to
|
|
// transition to the running status.
|
|
Expect(waitTillNPodsRunningOnNodes(f.ClientSet, nodeNames, rcName, f.Namespace.Name, totalPods,
|
|
time.Second*30)).NotTo(HaveOccurred())
|
|
if resourceMonitor != nil {
|
|
resourceMonitor.LogLatest()
|
|
}
|
|
|
|
By("Deleting the RC")
|
|
framework.DeleteRCAndPods(f.ClientSet, f.InternalClientset, f.Namespace.Name, rcName)
|
|
// Check that the pods really are gone by querying /runningpods on the
|
|
// node. The /runningpods handler checks the container runtime (or its
|
|
// cache) and returns a list of running pods. Some possible causes of
|
|
// failures are:
|
|
// - kubelet deadlock
|
|
// - a bug in graceful termination (if it is enabled)
|
|
// - docker slow to delete pods (or resource problems causing slowness)
|
|
start := time.Now()
|
|
Expect(waitTillNPodsRunningOnNodes(f.ClientSet, nodeNames, rcName, f.Namespace.Name, 0,
|
|
itArg.timeout)).NotTo(HaveOccurred())
|
|
framework.Logf("Deleting %d pods on %d nodes completed in %v after the RC was deleted", totalPods, len(nodeNames),
|
|
time.Since(start))
|
|
if resourceMonitor != nil {
|
|
resourceMonitor.LogCPUSummary()
|
|
}
|
|
})
|
|
}
|
|
})
|
|
})
|