401 lines
14 KiB
Go
401 lines
14 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"
|
|
"reflect"
|
|
"strings"
|
|
"time"
|
|
|
|
apierrs "k8s.io/apimachinery/pkg/api/errors"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/labels"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
"k8s.io/kubernetes/pkg/api"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
extensionsinternal "k8s.io/kubernetes/pkg/apis/extensions"
|
|
extensions "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
|
|
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
|
|
"k8s.io/kubernetes/pkg/kubectl"
|
|
"k8s.io/kubernetes/test/e2e/framework"
|
|
|
|
. "github.com/onsi/ginkgo"
|
|
. "github.com/onsi/gomega"
|
|
)
|
|
|
|
const (
|
|
// this should not be a multiple of 5, because node status updates
|
|
// every 5 seconds. See https://github.com/kubernetes/kubernetes/pull/14915.
|
|
dsRetryPeriod = 2 * time.Second
|
|
dsRetryTimeout = 5 * time.Minute
|
|
|
|
daemonsetLabelPrefix = "daemonset-"
|
|
daemonsetNameLabel = daemonsetLabelPrefix + "name"
|
|
daemonsetColorLabel = daemonsetLabelPrefix + "color"
|
|
)
|
|
|
|
// This test must be run in serial because it assumes the Daemon Set pods will
|
|
// always get scheduled. If we run other tests in parallel, this may not
|
|
// happen. In the future, running in parallel may work if we have an eviction
|
|
// model which lets the DS controller kick out other pods to make room.
|
|
// See http://issues.k8s.io/21767 for more details
|
|
var _ = framework.KubeDescribe("Daemon set [Serial]", func() {
|
|
var f *framework.Framework
|
|
|
|
AfterEach(func() {
|
|
if daemonsets, err := f.ClientSet.Extensions().DaemonSets(f.Namespace.Name).List(metav1.ListOptions{}); err == nil {
|
|
framework.Logf("daemonset: %s", runtime.EncodeOrDie(api.Codecs.LegacyCodec(api.Registry.EnabledVersions()...), daemonsets))
|
|
} else {
|
|
framework.Logf("unable to dump daemonsets: %v", err)
|
|
}
|
|
if pods, err := f.ClientSet.Core().Pods(f.Namespace.Name).List(metav1.ListOptions{}); err == nil {
|
|
framework.Logf("pods: %s", runtime.EncodeOrDie(api.Codecs.LegacyCodec(api.Registry.EnabledVersions()...), pods))
|
|
} else {
|
|
framework.Logf("unable to dump pods: %v", err)
|
|
}
|
|
err := clearDaemonSetNodeLabels(f.ClientSet)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
})
|
|
|
|
f = framework.NewDefaultFramework("daemonsets")
|
|
|
|
image := "gcr.io/google_containers/serve_hostname:v1.4"
|
|
dsName := "daemon-set"
|
|
|
|
var ns string
|
|
var c clientset.Interface
|
|
|
|
BeforeEach(func() {
|
|
ns = f.Namespace.Name
|
|
|
|
c = f.ClientSet
|
|
err := clearDaemonSetNodeLabels(c)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
})
|
|
|
|
It("should run and stop simple daemon", func() {
|
|
label := map[string]string{daemonsetNameLabel: dsName}
|
|
|
|
framework.Logf("Creating simple daemon set %s", dsName)
|
|
_, err := c.Extensions().DaemonSets(ns).Create(&extensions.DaemonSet{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: dsName,
|
|
},
|
|
Spec: extensions.DaemonSetSpec{
|
|
Template: v1.PodTemplateSpec{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Labels: label,
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: dsName,
|
|
Image: image,
|
|
Ports: []v1.ContainerPort{{ContainerPort: 9376}},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
})
|
|
Expect(err).NotTo(HaveOccurred())
|
|
defer func() {
|
|
framework.Logf("Check that reaper kills all daemon pods for %s", dsName)
|
|
dsReaper, err := kubectl.ReaperFor(extensionsinternal.Kind("DaemonSet"), f.InternalClientset)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
err = dsReaper.Stop(ns, dsName, 0, nil)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
err = wait.Poll(dsRetryPeriod, dsRetryTimeout, checkRunningOnNoNodes(f, label))
|
|
Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pod to be reaped")
|
|
}()
|
|
|
|
By("Check that daemon pods launch on every node of the cluster.")
|
|
Expect(err).NotTo(HaveOccurred())
|
|
err = wait.Poll(dsRetryPeriod, dsRetryTimeout, checkRunningOnAllNodes(f, label))
|
|
Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pod to start")
|
|
err = checkDaemonStatus(f, dsName)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
|
|
By("Stop a daemon pod, check that the daemon pod is revived.")
|
|
podClient := c.Core().Pods(ns)
|
|
|
|
selector := labels.Set(label).AsSelector()
|
|
options := metav1.ListOptions{LabelSelector: selector.String()}
|
|
podList, err := podClient.List(options)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
Expect(len(podList.Items)).To(BeNumerically(">", 0))
|
|
pod := podList.Items[0]
|
|
err = podClient.Delete(pod.Name, nil)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
err = wait.Poll(dsRetryPeriod, dsRetryTimeout, checkRunningOnAllNodes(f, label))
|
|
Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pod to revive")
|
|
|
|
})
|
|
|
|
It("should run and stop complex daemon", func() {
|
|
complexLabel := map[string]string{daemonsetNameLabel: dsName}
|
|
nodeSelector := map[string]string{daemonsetColorLabel: "blue"}
|
|
framework.Logf("Creating daemon with a node selector %s", dsName)
|
|
_, err := c.Extensions().DaemonSets(ns).Create(&extensions.DaemonSet{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: dsName,
|
|
},
|
|
Spec: extensions.DaemonSetSpec{
|
|
Selector: &metav1.LabelSelector{MatchLabels: complexLabel},
|
|
Template: v1.PodTemplateSpec{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Labels: complexLabel,
|
|
},
|
|
Spec: v1.PodSpec{
|
|
NodeSelector: nodeSelector,
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: dsName,
|
|
Image: image,
|
|
Ports: []v1.ContainerPort{{ContainerPort: 9376}},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
})
|
|
Expect(err).NotTo(HaveOccurred())
|
|
|
|
By("Initially, daemon pods should not be running on any nodes.")
|
|
err = wait.Poll(dsRetryPeriod, dsRetryTimeout, checkRunningOnNoNodes(f, complexLabel))
|
|
Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pods to be running on no nodes")
|
|
|
|
By("Change label of node, check that daemon pod is launched.")
|
|
nodeList := framework.GetReadySchedulableNodesOrDie(f.ClientSet)
|
|
Expect(len(nodeList.Items)).To(BeNumerically(">", 0))
|
|
newNode, err := setDaemonSetNodeLabels(c, nodeList.Items[0].Name, nodeSelector)
|
|
Expect(err).NotTo(HaveOccurred(), "error setting labels on node")
|
|
daemonSetLabels, _ := separateDaemonSetNodeLabels(newNode.Labels)
|
|
Expect(len(daemonSetLabels)).To(Equal(1))
|
|
err = wait.Poll(dsRetryPeriod, dsRetryTimeout, checkDaemonPodOnNodes(f, complexLabel, []string{newNode.Name}))
|
|
Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pods to be running on new nodes")
|
|
err = checkDaemonStatus(f, dsName)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
|
|
By("remove the node selector and wait for daemons to be unscheduled")
|
|
_, err = setDaemonSetNodeLabels(c, nodeList.Items[0].Name, map[string]string{})
|
|
Expect(err).NotTo(HaveOccurred(), "error removing labels on node")
|
|
Expect(wait.Poll(dsRetryPeriod, dsRetryTimeout, checkRunningOnNoNodes(f, complexLabel))).
|
|
NotTo(HaveOccurred(), "error waiting for daemon pod to not be running on nodes")
|
|
|
|
By("We should now be able to delete the daemon set.")
|
|
Expect(c.Extensions().DaemonSets(ns).Delete(dsName, nil)).NotTo(HaveOccurred())
|
|
|
|
})
|
|
|
|
It("should run and stop complex daemon with node affinity", func() {
|
|
complexLabel := map[string]string{daemonsetNameLabel: dsName}
|
|
nodeSelector := map[string]string{daemonsetColorLabel: "blue"}
|
|
framework.Logf("Creating daemon with a node affinity %s", dsName)
|
|
affinity := &v1.Affinity{
|
|
NodeAffinity: &v1.NodeAffinity{
|
|
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
|
|
NodeSelectorTerms: []v1.NodeSelectorTerm{
|
|
{
|
|
MatchExpressions: []v1.NodeSelectorRequirement{
|
|
{
|
|
Key: daemonsetColorLabel,
|
|
Operator: v1.NodeSelectorOpIn,
|
|
Values: []string{nodeSelector[daemonsetColorLabel]},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
_, err := c.Extensions().DaemonSets(ns).Create(&extensions.DaemonSet{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: dsName,
|
|
},
|
|
Spec: extensions.DaemonSetSpec{
|
|
Selector: &metav1.LabelSelector{MatchLabels: complexLabel},
|
|
Template: v1.PodTemplateSpec{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Labels: complexLabel,
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Affinity: affinity,
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: dsName,
|
|
Image: image,
|
|
Ports: []v1.ContainerPort{{ContainerPort: 9376}},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
})
|
|
Expect(err).NotTo(HaveOccurred())
|
|
|
|
By("Initially, daemon pods should not be running on any nodes.")
|
|
err = wait.Poll(dsRetryPeriod, dsRetryTimeout, checkRunningOnNoNodes(f, complexLabel))
|
|
Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pods to be running on no nodes")
|
|
|
|
By("Change label of node, check that daemon pod is launched.")
|
|
nodeList := framework.GetReadySchedulableNodesOrDie(f.ClientSet)
|
|
Expect(len(nodeList.Items)).To(BeNumerically(">", 0))
|
|
newNode, err := setDaemonSetNodeLabels(c, nodeList.Items[0].Name, nodeSelector)
|
|
Expect(err).NotTo(HaveOccurred(), "error setting labels on node")
|
|
daemonSetLabels, _ := separateDaemonSetNodeLabels(newNode.Labels)
|
|
Expect(len(daemonSetLabels)).To(Equal(1))
|
|
err = wait.Poll(dsRetryPeriod, dsRetryTimeout, checkDaemonPodOnNodes(f, complexLabel, []string{newNode.Name}))
|
|
Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pods to be running on new nodes")
|
|
err = checkDaemonStatus(f, dsName)
|
|
Expect(err).NotTo(HaveOccurred())
|
|
|
|
By("remove the node selector and wait for daemons to be unscheduled")
|
|
_, err = setDaemonSetNodeLabels(c, nodeList.Items[0].Name, map[string]string{})
|
|
Expect(err).NotTo(HaveOccurred(), "error removing labels on node")
|
|
Expect(wait.Poll(dsRetryPeriod, dsRetryTimeout, checkRunningOnNoNodes(f, complexLabel))).
|
|
NotTo(HaveOccurred(), "error waiting for daemon pod to not be running on nodes")
|
|
|
|
By("We should now be able to delete the daemon set.")
|
|
Expect(c.Extensions().DaemonSets(ns).Delete(dsName, nil)).NotTo(HaveOccurred())
|
|
|
|
})
|
|
})
|
|
|
|
func separateDaemonSetNodeLabels(labels map[string]string) (map[string]string, map[string]string) {
|
|
daemonSetLabels := map[string]string{}
|
|
otherLabels := map[string]string{}
|
|
for k, v := range labels {
|
|
if strings.HasPrefix(k, daemonsetLabelPrefix) {
|
|
daemonSetLabels[k] = v
|
|
} else {
|
|
otherLabels[k] = v
|
|
}
|
|
}
|
|
return daemonSetLabels, otherLabels
|
|
}
|
|
|
|
func clearDaemonSetNodeLabels(c clientset.Interface) error {
|
|
nodeList := framework.GetReadySchedulableNodesOrDie(c)
|
|
for _, node := range nodeList.Items {
|
|
_, err := setDaemonSetNodeLabels(c, node.Name, map[string]string{})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func setDaemonSetNodeLabels(c clientset.Interface, nodeName string, labels map[string]string) (*v1.Node, error) {
|
|
nodeClient := c.Core().Nodes()
|
|
var newNode *v1.Node
|
|
var newLabels map[string]string
|
|
err := wait.Poll(dsRetryPeriod, dsRetryTimeout, func() (bool, error) {
|
|
node, err := nodeClient.Get(nodeName, metav1.GetOptions{})
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
// remove all labels this test is creating
|
|
daemonSetLabels, otherLabels := separateDaemonSetNodeLabels(node.Labels)
|
|
if reflect.DeepEqual(daemonSetLabels, labels) {
|
|
newNode = node
|
|
return true, nil
|
|
}
|
|
node.Labels = otherLabels
|
|
for k, v := range labels {
|
|
node.Labels[k] = v
|
|
}
|
|
newNode, err = nodeClient.Update(node)
|
|
if err == nil {
|
|
newLabels, _ = separateDaemonSetNodeLabels(newNode.Labels)
|
|
return true, err
|
|
}
|
|
if se, ok := err.(*apierrs.StatusError); ok && se.ErrStatus.Reason == metav1.StatusReasonConflict {
|
|
framework.Logf("failed to update node due to resource version conflict")
|
|
return false, nil
|
|
}
|
|
return false, err
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
} else if len(newLabels) != len(labels) {
|
|
return nil, fmt.Errorf("Could not set daemon set test labels as expected.")
|
|
}
|
|
|
|
return newNode, nil
|
|
}
|
|
|
|
func checkDaemonPodOnNodes(f *framework.Framework, selector map[string]string, nodeNames []string) func() (bool, error) {
|
|
return func() (bool, error) {
|
|
selector := labels.Set(selector).AsSelector()
|
|
options := metav1.ListOptions{LabelSelector: selector.String()}
|
|
podList, err := f.ClientSet.Core().Pods(f.Namespace.Name).List(options)
|
|
if err != nil {
|
|
return false, nil
|
|
}
|
|
pods := podList.Items
|
|
|
|
nodesToPodCount := make(map[string]int)
|
|
for _, pod := range pods {
|
|
nodesToPodCount[pod.Spec.NodeName] += 1
|
|
}
|
|
framework.Logf("nodesToPodCount: %#v", nodesToPodCount)
|
|
|
|
// Ensure that exactly 1 pod is running on all nodes in nodeNames.
|
|
for _, nodeName := range nodeNames {
|
|
if nodesToPodCount[nodeName] != 1 {
|
|
return false, nil
|
|
}
|
|
}
|
|
|
|
// Ensure that sizes of the lists are the same. We've verified that every element of nodeNames is in
|
|
// nodesToPodCount, so verifying the lengths are equal ensures that there aren't pods running on any
|
|
// other nodes.
|
|
return len(nodesToPodCount) == len(nodeNames), nil
|
|
}
|
|
}
|
|
|
|
func checkRunningOnAllNodes(f *framework.Framework, selector map[string]string) func() (bool, error) {
|
|
return func() (bool, error) {
|
|
nodeList, err := f.ClientSet.Core().Nodes().List(metav1.ListOptions{})
|
|
framework.ExpectNoError(err)
|
|
nodeNames := make([]string, 0)
|
|
for _, node := range nodeList.Items {
|
|
nodeNames = append(nodeNames, node.Name)
|
|
}
|
|
return checkDaemonPodOnNodes(f, selector, nodeNames)()
|
|
}
|
|
}
|
|
|
|
func checkRunningOnNoNodes(f *framework.Framework, selector map[string]string) func() (bool, error) {
|
|
return checkDaemonPodOnNodes(f, selector, make([]string, 0))
|
|
}
|
|
|
|
func checkDaemonStatus(f *framework.Framework, dsName string) error {
|
|
ds, err := f.ClientSet.Extensions().DaemonSets(f.Namespace.Name).Get(dsName, metav1.GetOptions{})
|
|
if err != nil {
|
|
return fmt.Errorf("Could not get daemon set from v1.")
|
|
}
|
|
desired, scheduled, ready := ds.Status.DesiredNumberScheduled, ds.Status.CurrentNumberScheduled, ds.Status.NumberReady
|
|
if desired != scheduled && desired != ready {
|
|
return fmt.Errorf("Error in daemon status. DesiredScheduled: %d, CurrentScheduled: %d, Ready: %d", desired, scheduled, ready)
|
|
}
|
|
return nil
|
|
}
|