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Merge pull request #36918 from bprashanth/proxy_retry

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Automatic merge from submit-queue

Add clarity/retries to proxy url test

Improve one segment of the kube-proxy networking test by:      
1. Retrying for 30s 
2. Bucketing into 2 failure modes
3. Adding some clarity by describing the exec pod on failure

Althought 1 shouldn't be necessary, I don't think we lose anything if the kube-proxy convenience endpoint doesn't respond immediately, and if it fails for 30s straight it is indicative of something that requires attention probably within 1.5. 

Fixes https://github.com/kubernetes/kubernetes/issues/32436
This commit is contained in:
Kubernetes Submit Queue 2016-11-16 22:54:50 -08:00 committed by GitHub
commit 4dd17995fa
1 changed files with 27 additions and 2 deletions
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29
test/e2e/framework/networking_utils.go
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@ -269,8 +269,33 @@ func (config *NetworkingTestConfig) DialFromNode(protocol, targetIP string, targ
func (config *NetworkingTestConfig) GetSelfURL(path string, expected string) {
cmd := fmt.Sprintf("curl -q -s --connect-timeout 1 http://localhost:10249%s", path)
By(fmt.Sprintf("Getting kube-proxy self URL %s", path))
stdout := RunHostCmdOrDie(config.Namespace, config.HostTestContainerPod.Name, cmd)
Expect(strings.Contains(stdout, expected)).To(BeTrue())
// These are arbitrary timeouts. The curl command should pass on first try,
// unless kubeproxy is starved/bootstrapping/restarting etc.
const retryInterval = 1 * time.Second
const retryTimeout = 30 * time.Second
podName := config.HostTestContainerPod.Name
var msg string
if pollErr := wait.PollImmediate(retryInterval, retryTimeout, func() (bool, error) {
stdout, err := RunHostCmd(config.Namespace, podName, cmd)
if err != nil {
msg = fmt.Sprintf("failed executing cmd %v in %v/%v: %v", cmd, config.Namespace, podName, err)
Logf(msg)
return false, nil
}
if !strings.Contains(stdout, expected) {
msg = fmt.Sprintf("successfully executed %v in %v/%v, but output '%v' doesn't contain expected string '%v'", cmd, config.Namespace, podName, stdout, expected)
Logf(msg)
return false, nil
}
return true, nil
}); pollErr != nil {
Logf("\nOutput of kubectl describe pod %v/%v:\n", config.Namespace, podName)
desc, _ := RunKubectl(
"describe", "pod", podName, fmt.Sprintf("--namespace=%v", config.Namespace))
Logf("%s", desc)
Failf("Timed out in %v: %v", retryTimeout, msg)
}
}
func (config *NetworkingTestConfig) createNetShellPodSpec(podName string, node string) *api.Pod {