walnut.js/boot/master.js

99 lines
2.5 KiB
JavaScript

'use strict';
// TODO if RAM is very low we should not fork at all,
// but use a different process altogether
console.info('pid:', process.pid);
console.info('title:', process.title);
console.info('arch:', process.arch);
console.info('platform:', process.platform);
console.info('\n\n\n[MASTER] Welcome to WALNUT!');
function tryConf(pathname, def) {
try {
return require(pathname);
} catch(e) {
return def;
}
}
var path = require('path');
var cluster = require('cluster');
//var minWorkers = 2;
var numCores = 2; // Math.max(minWorkers, require('os').cpus().length);
var workers = [];
var state = { firstRun: true };
// TODO Should these be configurable? If so, where?
// TODO communicate config with environment vars?
var walnut = tryConf(
path.join('..', '..', 'config.walnut')
, { externalPort: 443
, externalInsecurePort: 80
}
);
var info = {
type: 'walnut.init'
, conf: {
protocol: 'http'
, externalPort: walnut.externalPort || 443
, externalPortInsecure: walnut.externalInsecurePort || 80 // TODO externalInsecurePort
, localPort: walnut.localPort || 3000 // system / local network
, trustProxy: true
, varpath: path.join(__dirname, '..', '..', 'var')
, etcpath: path.join(__dirname, '..', '..', 'etc')
}
};
function fork() {
if (workers.length < numCores) {
workers.push(cluster.fork());
}
}
cluster.on('online', function (worker) {
console.info('[MASTER] Worker ' + worker.process.pid + ' is online');
fork();
if (state.firstRun) {
state.firstRun = false;
// TODO dyndns in master?
}
function touchMaster(msg) {
if ('walnut.webserver.listening' !== msg.type) {
console.warn('[MASTER] received unexpected message from worker');
console.warn(msg);
return;
}
state.workers = workers;
// calls init if init has not been called
require('../lib/master').touch(info.conf, state).then(function (newConf) {
worker.send({ type: 'walnut.webserver.onrequest', conf: newConf });
newConf.addWorker(worker);
});
}
worker.send(info);
worker.on('message', touchMaster);
});
cluster.on('exit', function (worker, code, signal) {
console.info('[MASTER] Worker ' + worker.process.pid + ' died with code: ' + code + ', and signal: ' + signal);
workers = workers.map(function (w) {
if (worker !== w) {
return w;
}
return null;
}).filter(function (w) {
return w;
});
//console.log('WARNING: worker spawning turned off for debugging ');
fork();
});
fork();