EMACS TRAMP setup for "gcloud compute ssh"

tramp-gcloud-ssh

;; TRAMP gcloud ssh
(add-to-list 'tramp-methods
  '("gssh"
    (tramp-login-program        "gssh")
    (tramp-login-args           (("%h")))
    (tramp-async-args           (("-q")))
    (tramp-remote-shell         "/bin/sh")
    (tramp-remote-shell-args    ("-c"))
    (tramp-gw-args              (("-o" "GlobalKnownHostsFile=/dev/null")
                                 ("-o" "UserKnownHostsFile=/dev/null")
                                 ("-o" "StrictHostKeyChecking=no")))
    (tramp-default-port         22)))

Add this to your .emacs file to add a gssh method to TRAMP that connects to GCE instances on Google Cloud:
/gssh:some-instance:/path/to/file

gssh is a script I wrote that should be in your path. If you don't find gssh useful, you can replace it with gcloud compute ssh.

Based on https://qiita.com/tanatana/items/218b19808f2428b125fe