// kex_exchange_identification: Connection closed by remote host
// Connection closed by UNKNOWN port 65535
// exit status 255
+ //
+ // In case our target is a container request, the probe also
+ // resolves it to a container, so we don't connect to two
+ // different containers in a race.
+ var probetarget bytes.Buffer
exitcode := connectSSHCommand{}.RunCommand(
"arvados-client connect-ssh",
[]string{"-detach-keys=" + *detachKeys, "-probe-only=true", target},
- &bytes.Buffer{}, &bytes.Buffer{}, stderr)
+ &bytes.Buffer{}, &probetarget, stderr)
if exitcode != 0 {
return exitcode
}
+ target = strings.Trim(probetarget.String(), "\n")
selfbin, err := os.Readlink("/proc/self/exe")
if err != nil {
`)
f.PrintDefaults()
}
- probeOnly := f.Bool("probe-only", false, "do not transfer IO, just exit 0 immediately if tunnel setup succeeds")
+ probeOnly := f.Bool("probe-only", false, "do not transfer IO, just setup tunnel, print target UUID, and exit")
detachKeys := f.String("detach-keys", "", "set detach key sequence, as in docker-attach(1)")
if err := f.Parse(args); err != nil {
fmt.Fprintln(stderr, err)
defer sshconn.Conn.Close()
if *probeOnly {
+ fmt.Fprintln(stdout, targetUUID)
return 0
}