func waitForPortForwardDataStreamAndRun(pod string, uid types.UID, errorStream httpstream.Stream, dataStreamChan chan httpstream.Stream, host HostInterface) {
defer errorStream.Reset()
var dataStream httpstream.Stream
select {
case dataStream = <-dataStreamChan:
case <-time.After(streamCreationTimeout):
errorStream.Write([]byte("Timed out waiting for data stream"))
//TODO delete from dataStreamChans[port]
return
}
portString := dataStream.Headers().Get(api.PortHeader)
port, _ := strconv.ParseUint(portString, 10, 16)
err := host.PortForward(pod, uid, uint16(port), dataStream)
if err != nil {
msg := fmt.Errorf("Error forwarding port %d to pod %s, uid %v: %v", port, pod, uid, err)
glog.Error(msg)
errorStream.Write([]byte(msg.Error()))
}
}
func TestServeExecInContainer(t *testing.T) {
tests := []struct {
stdin bool
stdout bool
stderr bool
tty bool
responseStatusCode int
uid bool
}{
{responseStatusCode: http.StatusBadRequest},
{stdin: true, responseStatusCode: http.StatusSwitchingProtocols},
{stdout: true, responseStatusCode: http.StatusSwitchingProtocols},
{stderr: true, responseStatusCode: http.StatusSwitchingProtocols},
{stdout: true, stderr: true, responseStatusCode: http.StatusSwitchingProtocols},
{stdout: true, stderr: true, tty: true, responseStatusCode: http.StatusSwitchingProtocols},
{stdin: true, stdout: true, stderr: true, responseStatusCode: http.StatusSwitchingProtocols},
}
for i, test := range tests {
fw := newServerTest()
fw.fakeKubelet.streamingConnectionIdleTimeoutFunc = func() time.Duration {
return 0
}
podNamespace := "other"
podName := "foo"
expectedPodName := getPodName(podName, podNamespace)
expectedUid := "9b01b80f-8fb4-11e4-95ab-4200af06647"
expectedContainerName := "baz"
expectedCommand := "ls -a"
expectedStdin := "stdin"
expectedStdout := "stdout"
expectedStderr := "stderr"
execFuncDone := make(chan struct{})
clientStdoutReadDone := make(chan struct{})
clientStderrReadDone := make(chan struct{})
fw.fakeKubelet.execFunc = func(podFullName string, uid types.UID, containerName string, cmd []string, in io.Reader, out, stderr io.WriteCloser, tty bool) error {
defer close(execFuncDone)
if podFullName != expectedPodName {
t.Fatalf("%d: podFullName: expected %s, got %s", i, expectedPodName, podFullName)
}
if test.uid && string(uid) != expectedUid {
t.Fatalf("%d: uid: expected %v, got %v", i, expectedUid, uid)
}
if containerName != expectedContainerName {
t.Fatalf("%d: containerName: expected %s, got %s", i, expectedContainerName, containerName)
}
if strings.Join(cmd, " ") != expectedCommand {
t.Fatalf("%d: cmd: expected: %s, got %v", i, expectedCommand, cmd)
}
if test.stdin {
if in == nil {
t.Fatalf("%d: stdin: expected non-nil", i)
}
b := make([]byte, 10)
n, err := in.Read(b)
if err != nil {
t.Fatalf("%d: error reading from stdin: %v", i, err)
}
if e, a := expectedStdin, string(b[0:n]); e != a {
t.Fatalf("%d: stdin: expected to read %v, got %v", i, e, a)
}
} else if in != nil {
t.Fatalf("%d: stdin: expected nil: %#v", i, in)
}
if test.stdout {
if out == nil {
t.Fatalf("%d: stdout: expected non-nil", i)
}
_, err := out.Write([]byte(expectedStdout))
if err != nil {
t.Fatalf("%d:, error writing to stdout: %v", i, err)
}
out.Close()
<-clientStdoutReadDone
} else if out != nil {
t.Fatalf("%d: stdout: expected nil: %#v", i, out)
}
if tty {
if stderr != nil {
t.Fatalf("%d: tty set but received non-nil stderr: %v", i, stderr)
}
} else if test.stderr {
if stderr == nil {
t.Fatalf("%d: stderr: expected non-nil", i)
}
_, err := stderr.Write([]byte(expectedStderr))
if err != nil {
t.Fatalf("%d:, error writing to stderr: %v", i, err)
}
stderr.Close()
<-clientStderrReadDone
} else if stderr != nil {
t.Fatalf("%d: stderr: expected nil: %#v", i, stderr)
}
return nil
}
var url string
if test.uid {
url = fw.testHTTPServer.URL + "/exec/" + podNamespace + "/" + podName + "/" + expectedUid + "/" + expectedContainerName + "?command=ls&command=-a"
} else {
url = fw.testHTTPServer.URL + "/exec/" + podNamespace + "/" + podName + "/" + expectedContainerName + "?command=ls&command=-a"
}
if test.stdin {
url += "&" + api.ExecStdinParam + "=1"
}
if test.stdout {
url += "&" + api.ExecStdoutParam + "=1"
}
if test.stderr && !test.tty {
url += "&" + api.ExecStderrParam + "=1"
}
if test.tty {
url += "&" + api.ExecTTYParam + "=1"
}
var (
resp *http.Response
err error
upgradeRoundTripper httpstream.UpgradeRoundTripper
c *http.Client
)
if test.responseStatusCode != http.StatusSwitchingProtocols {
c = &http.Client{}
} else {
upgradeRoundTripper = spdy.NewRoundTripper(nil)
c = &http.Client{Transport: upgradeRoundTripper}
}
resp, err = c.Get(url)
if err != nil {
t.Fatalf("%d: Got error GETing: %v", i, err)
}
defer resp.Body.Close()
_, err = ioutil.ReadAll(resp.Body)
if err != nil {
t.Errorf("%d: Error reading response body: %v", i, err)
}
if e, a := test.responseStatusCode, resp.StatusCode; e != a {
t.Fatalf("%d: response status: expected %v, got %v", i, e, a)
}
if test.responseStatusCode != http.StatusSwitchingProtocols {
continue
}
conn, err := upgradeRoundTripper.NewConnection(resp)
if err != nil {
t.Fatalf("Unexpected error creating streaming connection: %s", err)
}
if conn == nil {
t.Fatalf("%d: unexpected nil conn", i)
}
defer conn.Close()
h := http.Header{}
h.Set(api.StreamType, api.StreamTypeError)
errorStream, err := conn.CreateStream(h)
if err != nil {
t.Fatalf("%d: error creating error stream: %v", i, err)
}
defer errorStream.Reset()
if test.stdin {
h.Set(api.StreamType, api.StreamTypeStdin)
stream, err := conn.CreateStream(h)
if err != nil {
t.Fatalf("%d: error creating stdin stream: %v", i, err)
}
defer stream.Reset()
_, err = stream.Write([]byte(expectedStdin))
if err != nil {
t.Fatalf("%d: error writing to stdin stream: %v", i, err)
}
}
var stdoutStream httpstream.Stream
if test.stdout {
h.Set(api.StreamType, api.StreamTypeStdout)
stdoutStream, err = conn.CreateStream(h)
if err != nil {
t.Fatalf("%d: error creating stdout stream: %v", i, err)
}
defer stdoutStream.Reset()
}
var stderrStream httpstream.Stream
if test.stderr && !test.tty {
h.Set(api.StreamType, api.StreamTypeStderr)
stderrStream, err = conn.CreateStream(h)
if err != nil {
t.Fatalf("%d: error creating stderr stream: %v", i, err)
}
defer stderrStream.Reset()
}
if test.stdout {
output := make([]byte, 10)
n, err := stdoutStream.Read(output)
close(clientStdoutReadDone)
if err != nil {
t.Fatalf("%d: error reading from stdout stream: %v", i, err)
}
if e, a := expectedStdout, string(output[0:n]); e != a {
t.Fatalf("%d: stdout: expected '%v', got '%v'", i, e, a)
}
}
if test.stderr && !test.tty {
output := make([]byte, 10)
n, err := stderrStream.Read(output)
close(clientStderrReadDone)
if err != nil {
t.Fatalf("%d: error reading from stderr stream: %v", i, err)
}
if e, a := expectedStderr, string(output[0:n]); e != a {
t.Fatalf("%d: stderr: expected '%v', got '%v'", i, e, a)
}
}
<-execFuncDone
}
}
// handleExec handles requests to run a command inside a container.
func (s *Server) handleExec(w http.ResponseWriter, req *http.Request) {
u, err := url.ParseRequestURI(req.RequestURI)
if err != nil {
s.error(w, err)
return
}
podNamespace, podID, uid, container, err := parseContainerCoordinates(u.Path)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
pod, ok := s.host.GetPodByName(podNamespace, podID)
if !ok {
http.Error(w, "Pod does not exist", http.StatusNotFound)
return
}
req.ParseForm()
// start at 1 for error stream
expectedStreams := 1
if req.FormValue(api.ExecStdinParam) == "1" {
expectedStreams++
}
if req.FormValue(api.ExecStdoutParam) == "1" {
expectedStreams++
}
tty := req.FormValue(api.ExecTTYParam) == "1"
if !tty && req.FormValue(api.ExecStderrParam) == "1" {
expectedStreams++
}
if expectedStreams == 1 {
http.Error(w, "You must specify at least 1 of stdin, stdout, stderr", http.StatusBadRequest)
return
}
streamCh := make(chan httpstream.Stream)
upgrader := spdy.NewResponseUpgrader()
conn := upgrader.UpgradeResponse(w, req, func(stream httpstream.Stream) error {
streamCh <- stream
return nil
})
// from this point on, we can no longer call methods on w
if conn == nil {
// The upgrader is responsible for notifying the client of any errors that
// occurred during upgrading. All we can do is return here at this point
// if we weren't successful in upgrading.
return
}
defer conn.Close()
conn.SetIdleTimeout(s.host.StreamingConnectionIdleTimeout())
// TODO make it configurable?
expired := time.NewTimer(streamCreationTimeout)
var errorStream, stdinStream, stdoutStream, stderrStream httpstream.Stream
receivedStreams := 0
WaitForStreams:
for {
select {
case stream := <-streamCh:
streamType := stream.Headers().Get(api.StreamType)
switch streamType {
case api.StreamTypeError:
errorStream = stream
defer errorStream.Reset()
receivedStreams++
case api.StreamTypeStdin:
stdinStream = stream
receivedStreams++
case api.StreamTypeStdout:
stdoutStream = stream
receivedStreams++
case api.StreamTypeStderr:
stderrStream = stream
receivedStreams++
default:
glog.Errorf("Unexpected stream type: '%s'", streamType)
}
if receivedStreams == expectedStreams {
break WaitForStreams
}
case <-expired.C:
// TODO find a way to return the error to the user. Maybe use a separate
// stream to report errors?
glog.Error("Timed out waiting for client to create streams")
return
}
}
if stdinStream != nil {
// close our half of the input stream, since we won't be writing to it
stdinStream.Close()
}
err = s.host.ExecInContainer(kubecontainer.GetPodFullName(pod), uid, container, u.Query()[api.ExecCommandParamm], stdinStream, stdoutStream, stderrStream, tty)
if err != nil {
msg := fmt.Sprintf("Error executing command in container: %v", err)
glog.Error(msg)
errorStream.Write([]byte(msg))
}
}
func (s *Server) createStreams(w http.ResponseWriter, req *http.Request) (io.Reader, io.WriteCloser, io.WriteCloser, io.WriteCloser, httpstream.Connection, bool, bool) {
req.ParseForm()
// start at 1 for error stream
expectedStreams := 1
if req.FormValue(api.ExecStdinParam) == "1" {
expectedStreams++
}
if req.FormValue(api.ExecStdoutParam) == "1" {
expectedStreams++
}
tty := req.FormValue(api.ExecTTYParam) == "1"
if !tty && req.FormValue(api.ExecStderrParam) == "1" {
expectedStreams++
}
if expectedStreams == 1 {
http.Error(w, "You must specify at least 1 of stdin, stdout, stderr", http.StatusBadRequest)
return nil, nil, nil, nil, nil, false, false
}
streamCh := make(chan httpstream.Stream)
upgrader := spdy.NewResponseUpgrader()
conn := upgrader.UpgradeResponse(w, req, func(stream httpstream.Stream) error {
streamCh <- stream
return nil
})
// from this point on, we can no longer call methods on w
if conn == nil {
// The upgrader is responsible for notifying the client of any errors that
// occurred during upgrading. All we can do is return here at this point
// if we weren't successful in upgrading.
return nil, nil, nil, nil, nil, false, false
}
conn.SetIdleTimeout(s.host.StreamingConnectionIdleTimeout())
// TODO make it configurable?
expired := time.NewTimer(streamCreationTimeout)
var errorStream, stdinStream, stdoutStream, stderrStream httpstream.Stream
receivedStreams := 0
WaitForStreams:
for {
select {
case stream := <-streamCh:
streamType := stream.Headers().Get(api.StreamType)
switch streamType {
case api.StreamTypeError:
errorStream = stream
defer errorStream.Reset()
receivedStreams++
case api.StreamTypeStdin:
stdinStream = stream
receivedStreams++
case api.StreamTypeStdout:
stdoutStream = stream
receivedStreams++
case api.StreamTypeStderr:
stderrStream = stream
receivedStreams++
default:
glog.Errorf("Unexpected stream type: '%s'", streamType)
}
if receivedStreams == expectedStreams {
break WaitForStreams
}
case <-expired.C:
// TODO find a way to return the error to the user. Maybe use a separate
// stream to report errors?
glog.Error("Timed out waiting for client to create streams")
return nil, nil, nil, nil, nil, false, false
}
}
if stdinStream != nil {
// close our half of the input stream, since we won't be writing to it
stdinStream.Close()
}
return stdinStream, stdoutStream, stderrStream, errorStream, conn, tty, true
}