// Stop attempts to gracefully stop `kubectl port-forward`, only killing it if necessary.
// This helps avoid spdy goroutine leaks in the Kubelet.
func (c *portForwardCommand) Stop() {
// SIGINT signals that kubectl port-forward should gracefully terminate
if err := c.cmd.Process.Signal(syscall.SIGINT); err != nil {
framework.Logf("error sending SIGINT to kubectl port-forward: %v", err)
}
// try to wait for a clean exit
done := make(chan error)
go func() {
done <- c.cmd.Wait()
}()
expired := time.NewTimer(wait.ForeverTestTimeout)
defer expired.Stop()
select {
case err := <-done:
if err == nil {
// success
return
}
framework.Logf("error waiting for kubectl port-forward to exit: %v", err)
case <-expired.C:
framework.Logf("timed out waiting for kubectl port-forward to exit")
}
framework.Logf("trying to forcibly kill kubectl port-forward")
framework.TryKill(c.cmd)
}
}
// We need to wait for the pod to be running, otherwise the deletion
// may be carried out immediately rather than gracefully.
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
// save the running pod
pod, err = podClient.Get(pod.Name, metav1.GetOptions{})
Expect(err).NotTo(HaveOccurred(), "failed to GET scheduled pod")
// start local proxy, so we can send graceful deletion over query string, rather than body parameter
cmd := framework.KubectlCmd("proxy", "-p", "0")
stdout, stderr, err := framework.StartCmdAndStreamOutput(cmd)
Expect(err).NotTo(HaveOccurred(), "failed to start up proxy")
defer stdout.Close()
defer stderr.Close()
defer framework.TryKill(cmd)
buf := make([]byte, 128)
var n int
n, err = stdout.Read(buf)
Expect(err).NotTo(HaveOccurred(), "failed to read from kubectl proxy stdout")
output := string(buf[:n])
proxyRegexp := regexp.MustCompile("Starting to serve on 127.0.0.1:([0-9]+)")
match := proxyRegexp.FindStringSubmatch(output)
Expect(len(match)).To(Equal(2))
port, err := strconv.Atoi(match[1])
Expect(err).NotTo(HaveOccurred(), "failed to convert port into string")
endpoint := fmt.Sprintf("http://localhost:%d/api/v1/namespaces/%s/pods/%s?gracePeriodSeconds=30", port, pod.Namespace, pod.Name)
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}