I want to run tcpdump against 500+ kubernetes pods, sampling for 30-120 seconds. kubectl against a single pod works great:

 $ kubectl exec -ti [POD NAME] timeout [SAMPLE TIME] tcpdump
 ...
 real tcpdump output in stdout!

I'd like to use parallel, which offers an easy way to dump out the results of this command. Prepending the above command with parallel doesn't work:

$ parallel kubectl exec -ti [POD NAME] timeout [SAMPLE TIME] tcpdump
Academic tradition requires you to cite works you base your article on.
When using programs that use GNU Parallel to process data for publication
please cite:

  O. Tange (2011): GNU Parallel - The Command-Line Power Tool,
  ;login: The USENIX Magazine, February 2011:42-47.

This helps funding further development; and it won't cost you a cent.
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.

To silence the citation notice: run 'parallel --bibtex'.

parallel: Warning: Input is read from the terminal.
parallel: Warning: Only experts do this on purpose. Press CTRL-D to exit.

What's the right way to do this?