To run the e2e tests against one or more hosts on gce:
$ go run run_e2e.go --logtostderr --v 2 --ssh-env gce --hosts <comma separated hosts>
To run the e2e tests against one or more images on gce and provision them:
$ go run run_e2e.go --logtostderr --v 2 --project <project> --zone <zone> --ssh-env gce --images <comma separated images>