Error: unable to upgrade connection: you must specify at least 1 of stdin, stdout, stderr

Symptom:

  We would like to run a simple comand ie pwd in a pod via client-go.  It error on below part of code:

err = exec.Stream(remotecommand.StreamOptions{
Stdin:  stdin,
Stdout: stdout,
Stderr: stderr,
Tty:    false,
})

Solution:

  We can simply to use os.Stdin os.Stdout os.Stderr to get the comand output from pod to our standard os output.  Correct code is like:

err = exec.Stream(remotecommand.StreamOptions{
Stdin:  os.Stdin,
Stdout: os.Stdout,
Stderr: os.Stderr,
Tty:    false,
})