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Merge pull request #34107 from MrHohn/e2e_sourceip_fix

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Automatic merge from submit-queue

Fix #31085, include output checking in retry loop

Fix #31085.

`wget -qO-` might omit the error and `RunHostCmd()` won't be able to catch it sometimes. Verify stdout is not empty within the retry loop to fix. Test passed 1500+ times in a row.

@freehan
This commit is contained in:
Kubernetes Submit Queue 2016-10-05 11:02:35 -07:00 committed by GitHub
commit da44775a2c
1 changed files with 14 additions and 7 deletions
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21
test/e2e/service.go
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@ -267,7 +267,7 @@ var _ = framework.KubeDescribe("Services", func() {
Expect(err).NotTo(HaveOccurred())
}()
// Waiting for service to expose endpoint
// Waiting for service to expose endpoint.
validateEndpointsOrFail(c, ns, serviceName, PortsByPodName{serverPodName: {servicePort}})
By("Retrieve sourceip from a pod on the same node")
@ -2332,25 +2332,32 @@ func execSourceipTest(f *framework.Framework, c *client.Client, ns, nodeName, se
timeout := 2 * time.Minute
framework.Logf("Waiting up to %v for sourceIp test to be executed", timeout)
cmd := fmt.Sprintf(`wget -T 30 -qO- %s:%d | grep client_address`, serviceIp, servicePort)
// need timeout mechanism because it may takes more times for iptables to be populated
// Need timeout mechanism because it may takes more times for iptables to be populated.
for start := time.Now(); time.Since(start) < timeout; time.Sleep(2) {
stdout, err = framework.RunHostCmd(execPod.Namespace, execPod.Name, cmd)
if err != nil {
framework.Logf("got err: %v, retry until timeout", err)
continue
}
// Need to check output because wget -q might omit the error.
if strings.TrimSpace(stdout) == "" {
framework.Logf("got empty stdout, retry until timeout")
continue
}
break
}
ExpectNoError(err)
// the stdout return from RunHostCmd seems to come with "\n", so TrimSpace is needed
// desired stdout in this format: client_address=x.x.x.x
// The stdout return from RunHostCmd seems to come with "\n", so TrimSpace is needed.
// Desired stdout in this format: client_address=x.x.x.x
outputs := strings.Split(strings.TrimSpace(stdout), "=")
sourceIp := ""
if len(outputs) != 2 {
// fail the test if output format is unexpected
// Fail the test if output format is unexpected.
framework.Failf("exec pod returned unexpected stdout format: [%v]\n", stdout)
return execPodIp, ""
} else {
sourceIp = outputs[1]
}
return execPodIp, outputs[1]
return execPodIp, sourceIp
}