// Run executes a validated remote execution against a pod.
func (p *AttachOptions) Run() error {
if p.Pod == nil {
pod, err := p.Client.Pods(p.Namespace).Get(p.PodName)
if err != nil {
return err
}
if pod.Status.Phase == api.PodSucceeded || pod.Status.Phase == api.PodFailed {
return fmt.Errorf("cannot attach a container in a completed pod; current phase is %s", pod.Status.Phase)
}
p.Pod = pod
// TODO: convert this to a clean "wait" behavior
}
pod := p.Pod
// ensure we can recover the terminal while attached
t := term.TTY{
Parent: p.InterruptParent,
Out: p.Out,
}
// check for TTY
tty := p.TTY
containerToAttach, err := p.containerToAttachTo(pod)
if err != nil {
return fmt.Errorf("cannot attach to the container: %v", err)
}
if tty && !containerToAttach.TTY {
tty = false
fmt.Fprintf(p.Err, "Unable to use a TTY - container %s did not allocate one\n", containerToAttach.Name)
}
if p.Stdin {
t.In = p.In
if tty && !t.IsTerminalIn() {
tty = false
fmt.Fprintln(p.Err, "Unable to use a TTY - input is not a terminal or the right kind of file")
}
} else {
p.In = nil
}
t.Raw = tty
// save p.Err so we can print the command prompt message below
stderr := p.Err
var sizeQueue term.TerminalSizeQueue
if tty {
if size := t.GetSize(); size != nil {
// fake resizing +1 and then back to normal so that attach-detach-reattach will result in the
// screen being redrawn
sizePlusOne := *size
sizePlusOne.Width++
sizePlusOne.Height++
// this call spawns a goroutine to monitor/update the terminal size
sizeQueue = t.MonitorSize(&sizePlusOne, size)
}
// unset p.Err if it was previously set because both stdout and stderr go over p.Out when tty is
// true
p.Err = nil
}
fn := func() error {
if stderr != nil {
fmt.Fprintln(stderr, "If you don't see a command prompt, try pressing enter.")
}
// TODO: consider abstracting into a client invocation or client helper
req := p.Client.RESTClient.Post().
Resource("pods").
Name(pod.Name).
Namespace(pod.Namespace).
SubResource("attach")
req.VersionedParams(&api.PodAttachOptions{
Container: containerToAttach.Name,
Stdin: p.Stdin,
Stdout: p.Out != nil,
Stderr: p.Err != nil,
TTY: tty,
}, api.ParameterCodec)
return p.Attach.Attach("POST", req.URL(), p.Config, p.In, p.Out, p.Err, tty, sizeQueue)
}
if err := t.Safe(fn); err != nil {
return err
}
if p.Stdin && tty && pod.Spec.RestartPolicy == api.RestartPolicyAlways {
fmt.Fprintf(p.Out, "Session ended, resume using '%s %s -c %s -i -t' command when the pod is running\n", p.CommandName, pod.Name, containerToAttach.Name)
}
return nil
}
// Run executes a validated remote execution against a pod.
func (p *ExecOptions) Run() error {
pod, err := p.Client.Pods(p.Namespace).Get(p.PodName)
if err != nil {
return err
}
if pod.Status.Phase == api.PodSucceeded || pod.Status.Phase == api.PodFailed {
return fmt.Errorf("cannot exec into a container in a completed pod; current phase is %s", pod.Status.Phase)
}
containerName := p.ContainerName
if len(containerName) == 0 {
glog.V(4).Infof("defaulting container name to %s", pod.Spec.Containers[0].Name)
containerName = pod.Spec.Containers[0].Name
}
// ensure we can recover the terminal while attached
t := term.TTY{
Parent: p.InterruptParent,
Out: p.Out,
}
// check for TTY
tty := p.TTY
if p.Stdin {
t.In = p.In
if tty && !t.IsTerminalIn() {
tty = false
fmt.Fprintln(p.Err, "Unable to use a TTY - input is not a terminal or the right kind of file")
}
} else {
p.In = nil
}
t.Raw = tty
var sizeQueue term.TerminalSizeQueue
if tty {
// this call spawns a goroutine to monitor/update the terminal size
sizeQueue = t.MonitorSize(t.GetSize())
// unset p.Err if it was previously set because both stdout and stderr go over p.Out when tty is
// true
p.Err = nil
}
fn := func() error {
// TODO: consider abstracting into a client invocation or client helper
req := p.Client.RESTClient.Post().
Resource("pods").
Name(pod.Name).
Namespace(pod.Namespace).
SubResource("exec").
Param("container", containerName)
req.VersionedParams(&api.PodExecOptions{
Container: containerName,
Command: p.Command,
Stdin: p.Stdin,
Stdout: p.Out != nil,
Stderr: p.Err != nil,
TTY: tty,
}, api.ParameterCodec)
return p.Executor.Execute("POST", req.URL(), p.Config, p.In, p.Out, p.Err, tty, sizeQueue)
}
if err := t.Safe(fn); err != nil {
return err
}
return nil
}
