Change:
<del> /* 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. */ /* This soak tests places a specified number of pods on each node and then repeatedly sends queries to a service running on these pods via a service. */ package main import ( "flag" "fmt" "io/ioutil" "net/http" "time" corev1 "k8s.io/api/core/v1" "k8s.io/apimachinery/pkg/api/errors" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" "k8s.io/apimachinery/pkg/util/intstr" clientset "k8s.io/client-go/kubernetes" restclient "k8s.io/client-go/rest" "k8s.io/klog" "k8s.io/kubernetes/test/e2e/framework" ) var ( queriesAverage = flag.Int("queries", 100, "Number of hostname queries to make in each iteration per pod on average") podsPerNode    = flag.Int("pods_per_node", 1, "Number of serve_hostname pods per node") upTo           = flag.Int("up_to", 1, "Number of iterations or -1 for no limit") maxPar         = flag.Int("max_in_flight", 100, "Maximum number of queries in flight") ) const ( deleteTimeout          = 2 * time.Minute endpointTimeout        = 5 * time.Minute nodeListTimeout        = 2 * time.Minute podCreateTimeout       = 2 * time.Minute podStartTimeout        = 30 * time.Minute serviceCreateTimeout   = 2 * time.Minute namespaceDeleteTimeout = 5 * time.Minute ) func main() { flag.Parse() klog.Infof("Starting cauldron soak test with queries=%d podsPerNode=%d upTo=%d maxPar=%d", *queriesAverage, *podsPerNode, *upTo, *maxPar) cc, err := restclient.InClusterConfig() if err != nil { klog.Fatalf("Failed to make client: %v", err) } client, err := clientset.NewForConfig(cc) if err != nil { klog.Fatalf("Failed to make client: %v", err) } var nodes *corev1.NodeList for start := time.Now(); time.Since(start) < nodeListTimeout; time.Sleep(2 * time.Second) { nodes, err = client.CoreV1().Nodes().List(metav1.ListOptions{}) if err == nil { break } klog.Warningf("Failed to list nodes: %v", err) } if err != nil { klog.Fatalf("Giving up trying to list nodes: %v", err) } if len(nodes.Items) == 0 { klog.Fatalf("Failed to find any nodes.") } klog.Infof("Found %d nodes on this cluster:", len(nodes.Items)) for i, node := range nodes.Items { klog.Infof("%d: %s", i, node.Name) } queries := *queriesAverage * len(nodes.Items) * *podsPerNode // Create a uniquely named namespace. got, err := client.CoreV1().Namespaces().Create(&corev1.Namespace{ObjectMeta: metav1.ObjectMeta{GenerateName: "serve-hostnames-"}}) if err != nil { klog.Fatalf("Failed to create namespace: %v", err) } ns := got.Name defer func(ns string) { if err := client.CoreV1().Namespaces().Delete(ns, nil); err != nil { klog.Warningf("Failed to delete namespace %s: %v", ns, err) } else { // wait until the namespace disappears for i := 0; i < int(namespaceDeleteTimeout/time.Second); i++ { if _, err := client.CoreV1().Namespaces().Get(ns, metav1.GetOptions{}); err != nil { if errors.IsNotFound(err) { return } } time.Sleep(time.Second) } } }(ns) klog.Infof("Created namespace %s", ns) // Create a service for these pods. klog.Infof("Creating service %s/serve-hostnames", ns) // Make several attempts to create a service. var svc *corev1.Service for start := time.Now(); time.Since(start) < serviceCreateTimeout; time.Sleep(2 * time.Second) { t := time.Now() svc, err = client.CoreV1().Services(ns).Create(&corev1.Service{ ObjectMeta: metav1.ObjectMeta{ Name: "serve-hostnames", Labels: map[string]string{ "name": "serve-hostname", }, }, Spec: corev1.ServiceSpec{ Ports: []corev1.ServicePort{{ Protocol:   "TCP", Port:       9376, TargetPort: intstr.FromInt(9376), }}, Selector: map[string]string{ "name": "serve-hostname", }, }, }) klog.V(4).Infof("Service create %s/server-hostnames took %v", ns, time.Since(t)) if err == nil { break } klog.Warningf("After %v failed to create service %s/serve-hostnames: %v", time.Since(start), ns, err) } if err != nil { klog.Warningf("Unable to create service %s/%s: %v", ns, svc.Name, err) return } // Clean up service defer func() { klog.Infof("Cleaning up service %s/serve-hostnames", ns) // Make several attempts to delete the service. for start := time.Now(); time.Since(start) < deleteTimeout; time.Sleep(1 * time.Second) { if err := client.CoreV1().Services(ns).Delete(svc.Name, nil); err == nil { return } klog.Warningf("After %v unable to delete service %s/%s: %v", time.Since(start), ns, svc.Name, err) } }() // Put serve-hostname pods on each node. podNames := []string{} for i, node := range nodes.Items { for j := 0; j < *podsPerNode; j++ { podName := fmt.Sprintf("serve-hostname-%d-%d", i, j) podNames = append(podNames, podName) // Make several attempts for start := time.Now(); time.Since(start) < podCreateTimeout; time.Sleep(2 * time.Second) { klog.Infof("Creating pod %s/%s on node %s", ns, podName, node.Name) t := time.Now() _, err = client.CoreV1().Pods(ns).Create(&corev1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name: podName, Labels: map[string]string{ "name": "serve-hostname", }, }, Spec: corev1.PodSpec{ Containers: []corev1.Container{ { Name:  "serve-hostname", Image: framework.ServeHostnameImage, Ports: []corev1.ContainerPort{{ContainerPort: 9376}}, }, }, NodeName: node.Name, }, }) klog.V(4).Infof("Pod create %s/%s request took %v", ns, podName, time.Since(t)) if err == nil { break } klog.Warningf("After %s failed to create pod %s/%s: %v", time.Since(start), ns, podName, err) } if err != nil { klog.Warningf("Failed to create pod %s/%s: %v", ns, podName, err) return } } } // Clean up the pods defer func() { klog.Info("Cleaning up pods") // Make several attempts to delete the pods. for _, podName := range podNames { for start := time.Now(); time.Since(start) < deleteTimeout; time.Sleep(1 * time.Second) { if err = client.CoreV1().Pods(ns).Delete(podName, nil); err == nil { break } klog.Warningf("After %v failed to delete pod %s/%s: %v", time.Since(start), ns, podName, err) } } }() klog.Info("Waiting for the serve-hostname pods to be ready") for _, podName := range podNames { var pod *corev1.Pod for start := time.Now(); time.Since(start) < podStartTimeout; time.Sleep(5 * time.Second) { pod, err = client.CoreV1().Pods(ns).Get(podName, metav1.GetOptions{}) if err != nil { klog.Warningf("Get pod %s/%s failed, ignoring for %v: %v", ns, podName, err, podStartTimeout) continue } if pod.Status.Phase == corev1.PodRunning { break } } if pod.Status.Phase != corev1.PodRunning { klog.Warningf("Gave up waiting on pod %s/%s to be running (saw %v)", ns, podName, pod.Status.Phase) } else { klog.Infof("%s/%s is running", ns, podName) } } // Wait for the endpoints to propagate. for start := time.Now(); time.Since(start) < endpointTimeout; time.Sleep(10 * time.Second) { _, err = http.Get(fmt.Sprintf("http://serve-hostnames.%s:9376", ns)) if err == nil { break } klog.Infof("After %v while making a request got error %v", time.Since(start), err) } if err != nil { klog.Errorf("Failed to get a response from service: %v", err) } // Repeatedly make requests. for iteration := 0; iteration != *upTo; iteration++ { responseChan := make(chan string, queries) // Use a channel of size *maxPar to throttle the number // of in-flight requests to avoid overloading the service. inFlight := make(chan struct{}, *maxPar) start := time.Now() for q := 0; q < queries; q++ { go func(i int, query int) { inFlight <- struct{}{} t := time.Now() resp, err := http.Get(fmt.Sprintf("http://serve-hostnames.%s:9376", ns)) klog.V(4).Infof("Call to serve-hostnames in namespace %s took %v", ns, time.Since(t)) if err != nil { klog.Warningf("Call failed during iteration %d query %d : %v", i, query, err) // If the query failed return a string which starts with a character // that can't be part of a hostname. responseChan <- fmt.Sprintf("!failed in iteration %d to issue query %d: %v", i, query, err) } else { defer resp.Body.Close() hostname, err := ioutil.ReadAll(resp.Body) if err != nil { responseChan <- fmt.Sprintf("!failed in iteration %d to read body of response: %v", i, err) } else { responseChan <- string(hostname) } } <-inFlight }(iteration, q) } responses := make(map[string]int, *podsPerNode*len(nodes.Items)) missing := 0 for q := 0; q < queries; q++ { r := <-responseChan klog.V(4).Infof("Got response from %s", r) responses[r]++ // If the returned hostname starts with '!' then it indicates // an error response. if len(r) > 0 && r[0] == '!' { klog.V(3).Infof("Got response %s", r) missing++ } } if missing > 0 { klog.Warningf("Missing %d responses out of %d", missing, queries) } // Report any nodes that did not respond. for n, node := range nodes.Items { for i := 0; i < *podsPerNode; i++ { name := fmt.Sprintf("serve-hostname-%d-%d", n, i) if _, ok := responses[name]; !ok { klog.Warningf("No response from pod %s on node %s at iteration %d", name, node.Name, iteration) } } } klog.Infof("Iteration %d took %v for %d queries (%.2f QPS) with %d missing", iteration, time.Since(start), queries-missing, float64(queries-missing)/time.Since(start).Seconds(), missing) } } </del>

Discussion:
We've deleted all repos from Docker Hub and will be retiring the org/user (ref: ) Apparently the repo is referenced for docker push and pull in It's unclear to me whether we have broken anything, or if this is dead code. I would use to find out if this is referenced anywhere (aside from sundry vendor dirs) If dead code: remove it If used: move to test/e2e/images and follow the same pattern there used to push to /sig testing /area test /wg k8s-infra /priority important-soon /help /good-first-issue I believe this is a pretty straightforward issue and am happy to review whatever PR's are made for it
This request has been marked as suitable for new contributors. Please ensure the request meets the requirements listed . If this request no longer meets these requirements, the label can be removed by commenting with the command. <detailsIn response to : We've deleted all repos from Docker Hub and will be retiring the org/user (ref: ) /area test /wg k8s-infra /priority important-soon /good-first-issue I believe this is a pretty straightforward issue and am happy to review whatever PR's are made for it Instructions for interacting with me using PR comments are available . If you have questions or suggestions related to my behavior, please file an issue against the repository. </details