mirror of https://github.com/k3s-io/k3s
274 lines
8.7 KiB
Go
274 lines
8.7 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package e2e
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import (
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"fmt"
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"time"
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"k8s.io/kubernetes/pkg/api"
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apierrs "k8s.io/kubernetes/pkg/api/errors"
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"k8s.io/kubernetes/pkg/api/unversioned"
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"k8s.io/kubernetes/pkg/apis/experimental"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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"k8s.io/kubernetes/pkg/fields"
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"k8s.io/kubernetes/pkg/kubectl"
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"k8s.io/kubernetes/pkg/labels"
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"k8s.io/kubernetes/pkg/util/wait"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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const (
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updateRetryPeriod = 5 * time.Second
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updateRetryTimeout = 30 * time.Second
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)
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var _ = Describe("Daemon set", func() {
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f := &Framework{BaseName: "daemonsets"}
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BeforeEach(func() {
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f.beforeEach()
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err := clearNodeLabels(f.Client)
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Expect(err).NotTo(HaveOccurred())
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})
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AfterEach(func() {
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err := clearNodeLabels(f.Client)
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Expect(err).NotTo(HaveOccurred())
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f.afterEach()
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})
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It("should launch a daemon pod on every node of the cluster", func() {
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testDaemonSets(f)
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})
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})
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func clearNodeLabels(c *client.Client) error {
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nodeClient := c.Nodes()
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nodeList, err := nodeClient.List(labels.Everything(), fields.Everything())
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if err != nil {
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return err
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}
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for _, node := range nodeList.Items {
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if len(node.Labels) != 0 {
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node.Labels = map[string]string{}
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var newNode *api.Node
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err = wait.Poll(updateRetryPeriod, updateRetryTimeout, func() (bool, error) {
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newNode, err = nodeClient.Update(&node)
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if err == nil {
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return true, err
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}
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if se, ok := err.(*apierrs.StatusError); ok && se.ErrStatus.Reason == unversioned.StatusReasonConflict {
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Logf("failed to update node due to resource version conflict")
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return false, nil
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}
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return false, err
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})
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if err != nil {
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return err
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} else if len(newNode.Labels) != 0 {
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return fmt.Errorf("Could not make node labels nil.")
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}
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}
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}
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return nil
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}
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func checkDaemonPodOnNodes(f *Framework, selector map[string]string, nodeNames []string) func() (bool, error) {
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return func() (bool, error) {
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podList, err := f.Client.Pods(f.Namespace.Name).List(labels.Set(selector).AsSelector(), fields.Everything())
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if err != nil {
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return false, nil
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}
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pods := podList.Items
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nodesToPodCount := make(map[string]int)
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for _, pod := range pods {
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nodesToPodCount[pod.Spec.NodeName] += 1
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}
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// Ensure that exactly 1 pod is running on all nodes in nodeNames.
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for _, nodeName := range nodeNames {
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if nodesToPodCount[nodeName] != 1 {
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return false, nil
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}
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}
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// Ensure that sizes of the lists are the same. We've verified that every element of nodeNames is in
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// nodesToPodCount, so verifying the lengths are equal ensures that there aren't pods running on any
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// other nodes.
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return len(nodesToPodCount) == len(nodeNames), nil
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}
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}
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func checkRunningOnAllNodes(f *Framework, selector map[string]string) func() (bool, error) {
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return func() (bool, error) {
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nodeList, err := f.Client.Nodes().List(labels.Everything(), fields.Everything())
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if err != nil {
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return false, nil
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}
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nodeNames := make([]string, 0)
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for _, node := range nodeList.Items {
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nodeNames = append(nodeNames, node.Name)
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}
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return checkDaemonPodOnNodes(f, selector, nodeNames)()
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}
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}
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func checkRunningOnNoNodes(f *Framework, selector map[string]string) func() (bool, error) {
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return checkDaemonPodOnNodes(f, selector, make([]string, 0))
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}
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func testDaemonSets(f *Framework) {
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ns := f.Namespace.Name
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c := f.Client
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simpleDSName := "simple-daemon-set"
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image := "gcr.io/google_containers/serve_hostname:1.1"
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label := map[string]string{"name": simpleDSName}
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retryTimeout := 1 * time.Minute
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retryInterval := 5 * time.Second
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Logf("Creating simple daemon set %s", simpleDSName)
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_, err := c.DaemonSets(ns).Create(&experimental.DaemonSet{
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ObjectMeta: api.ObjectMeta{
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Name: simpleDSName,
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},
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Spec: experimental.DaemonSetSpec{
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Template: &api.PodTemplateSpec{
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ObjectMeta: api.ObjectMeta{
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Labels: label,
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},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{
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Name: simpleDSName,
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Image: image,
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Ports: []api.ContainerPort{{ContainerPort: 9376}},
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},
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},
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},
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},
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},
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})
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Expect(err).NotTo(HaveOccurred())
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defer func() {
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Logf("Check that reaper kills all daemon pods for %s", simpleDSName)
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dsReaper, err := kubectl.ReaperFor("DaemonSet", c)
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Expect(err).NotTo(HaveOccurred())
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_, err = dsReaper.Stop(ns, simpleDSName, 0, nil)
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Expect(err).NotTo(HaveOccurred())
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err = wait.Poll(retryInterval, retryTimeout, checkRunningOnNoNodes(f, label))
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Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pod to be reaped")
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}()
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By("Check that daemon pods launch on every node of the cluster.")
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Expect(err).NotTo(HaveOccurred())
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err = wait.Poll(retryInterval, retryTimeout, checkRunningOnAllNodes(f, label))
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Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pod to start")
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By("Stop a daemon pod, check that the daemon pod is revived.")
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podClient := c.Pods(ns)
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podList, err := podClient.List(labels.Set(label).AsSelector(), fields.Everything())
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Expect(err).NotTo(HaveOccurred())
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Expect(len(podList.Items)).To(BeNumerically(">", 0))
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pod := podList.Items[0]
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err = podClient.Delete(pod.Name, nil)
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Expect(err).NotTo(HaveOccurred())
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err = wait.Poll(retryInterval, retryTimeout, checkRunningOnAllNodes(f, label))
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Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pod to revive")
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complexDSName := "complex-daemon-set"
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complexLabel := map[string]string{"name": complexDSName}
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nodeSelector := map[string]string{"color": "blue"}
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Logf("Creating daemon with a node selector %s", complexDSName)
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_, err = c.DaemonSets(ns).Create(&experimental.DaemonSet{
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ObjectMeta: api.ObjectMeta{
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Name: complexDSName,
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},
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Spec: experimental.DaemonSetSpec{
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Selector: complexLabel,
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Template: &api.PodTemplateSpec{
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ObjectMeta: api.ObjectMeta{
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Labels: complexLabel,
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},
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Spec: api.PodSpec{
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NodeSelector: nodeSelector,
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Containers: []api.Container{
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{
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Name: complexDSName,
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Image: image,
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Ports: []api.ContainerPort{{ContainerPort: 9376}},
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},
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},
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},
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},
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},
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})
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Expect(err).NotTo(HaveOccurred())
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By("Initially, daemon pods should not be running on any nodes.")
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err = wait.Poll(retryInterval, retryTimeout, checkRunningOnNoNodes(f, complexLabel))
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Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pods to be running on no nodes")
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By("Change label of node, check that daemon pod is launched.")
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nodeClient := c.Nodes()
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nodeList, err := nodeClient.List(labels.Everything(), fields.Everything())
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Expect(len(nodeList.Items)).To(BeNumerically(">", 0))
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nodeList.Items[0].Labels = nodeSelector
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var newNode *api.Node
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err = wait.Poll(updateRetryPeriod, updateRetryTimeout, func() (bool, error) {
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newNode, err = nodeClient.Update(&nodeList.Items[0])
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if err == nil {
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return true, err
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}
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if se, ok := err.(*apierrs.StatusError); ok && se.ErrStatus.Reason == unversioned.StatusReasonConflict {
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Logf("failed to update node due to resource version conflict")
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return false, nil
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}
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return false, err
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})
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Expect(err).NotTo(HaveOccurred())
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Expect(len(newNode.Labels)).To(Equal(1))
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err = wait.Poll(retryInterval, retryTimeout, checkDaemonPodOnNodes(f, complexLabel, []string{newNode.Name}))
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Expect(err).NotTo(HaveOccurred(), "error waiting for daemon pods to be running on new nodes")
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By("remove the node selector and wait for daemons to be unscheduled")
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newNode, err = nodeClient.Get(newNode.Name)
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Expect(err).NotTo(HaveOccurred(), "error getting node")
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newNode.Labels = map[string]string{}
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err = wait.Poll(updateRetryPeriod, updateRetryTimeout, func() (bool, error) {
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newNode, err = nodeClient.Update(newNode)
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if err == nil {
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return true, err
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}
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if se, ok := err.(*apierrs.StatusError); ok && se.ErrStatus.Reason == unversioned.StatusReasonConflict {
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Logf("failed to update node due to resource version conflict")
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return false, nil
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}
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return false, err
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})
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Expect(err).NotTo(HaveOccurred())
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Expect(wait.Poll(retryInterval, retryTimeout, checkRunningOnNoNodes(f, complexLabel))).
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NotTo(HaveOccurred(), "error waiting for daemon pod to not be running on nodes")
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By("We should now be able to delete the daemon set.")
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Expect(c.DaemonSets(ns).Delete(complexDSName)).NotTo(HaveOccurred())
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}
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