Hi,
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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