Does anyone have any thoughts on the below?
Or is there a better zero-downtime deployment module I should use instead of
naught that has already solved this problem of how to pass along a socket on a
file descriptor?
On Nov 2, 2014, at 6:32 PM, Ryan Schmidt wrote:
> My server is started by another process that hands it a socket on file
> descriptor 11. I start my server this way:
>
> http.createServer(app).listen({fd: 11});
>
> Now I want to modify this to enable zero-downtime deployments, so I would
> like to have naught start my server. The question is: how can I get naught to
> pass fd 11 to my script so that I can listen on it? Or, how do I "connect"
> naught's fd 11 with my script's fd 11?
>
> I have tried modifying naught's spawn invocation so that it reads:
>
> var stdio = [process.stdin, stdoutValue, stderrValue, 'ipc'];
> stdio[11] = 11;
> master = spawn(process.execPath, nodeArgs.concat([path.join(__dirname,
> "master.js"), workerCount, script]).concat(argv), {
> env: process.env,
> stdio: stdio,
> cwd: process.cwd(),
> });
>
> Basically I have added "stdio[11] = 11;" However this doesn't seem to be
> working. My server is failing to listen, getting the error "Error: listen
> ENOTSOCK". The node documentation says a positive integer in the stdio array
> "is interpreted as a file descriptor that is is currently open in the parent
> process. It is shared with the child process". I'm wondering if the problem
> is that the file descriptor, though available to my parent process, is not
> open yet. If so, how should I open it? Just fs.open?
>
> Is there some way for naught (or any process) to know which fds are being
> made available to it, and pass them on to the child without needing to be
> told what they are? Is it possible for a process to automatically pass all
> fds to a child without having to enumerate them?
>
>
> I have also filed this issue as a naught ticket but haven't heard back yet:
>
> https://github.com/andrewrk/naught/issues/65
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