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server.js
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server.js
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/* eslint global-require:0 */
'use strict';
process.env.UV_THREADPOOL_SIZE = 16;
const v8 = require('node:v8');
const Path = require('path');
const os = require('os');
const config = require('wild-config');
if (process.env.NODE_CONFIG_ONLY === 'true') {
console.log(require('util').inspect(config, false, 22)); // eslint-disable-line
return process.exit();
}
const errors = require('./lib/errors');
const fs = require('fs');
const log = require('npmlog');
const packageData = require('./package.json');
const { init: initElasticSearch } = require('./lib/elasticsearch');
log.level = config.log.level;
const printLogo = () => {
let logo = fs
.readFileSync(__dirname + '/logo.txt', 'utf-8')
.replace(/^\n+|\n+$/g, '')
.split('\n');
let columnLength = logo.map(l => l.length).reduce((max, val) => (val > max ? val : max), 0);
let versionString = ' ' + packageData.name + '@' + packageData.version + ' ';
let versionPrefix = '-'.repeat(Math.round(columnLength / 2 - versionString.length / 2));
let versionSuffix = '-'.repeat(columnLength - versionPrefix.length - versionString.length);
log.info('App', ' ' + '-'.repeat(columnLength));
log.info('App', '');
logo.forEach(line => {
log.info('App', ' ' + line);
});
log.info('App', '');
log.info('App', ' ' + versionPrefix + versionString + versionSuffix);
log.info('App', '');
};
let processCount = config.processes;
if (processCount) {
if (/^\s*cpus\s*$/i.test(processCount)) {
processCount = os.cpus().length;
}
if (typeof processCount !== 'number' && !isNaN(processCount)) {
processCount = Number(processCount);
}
if (isNaN(processCount)) {
processCount = 1;
}
}
if (!processCount || processCount <= 1) {
printLogo();
if (config.ident) {
process.title = config.ident;
}
// single process mode, do not fork anything
initElasticSearch()
.then(started => {
if (started) {
log.verbose('App', `ElasticSearch setup checked`);
}
})
.catch(err => {
log.error('App', `ElasticSearch setup failed: ${err.message}${err.meta?.statusCode ? ` (${err.meta?.statusCode})` : ''}`);
})
.finally(() => {
require('./worker.js');
});
} else {
let cluster = require('cluster');
if (cluster.isMaster) {
printLogo();
if (config.ident) {
process.title = config.ident + ' master';
}
log.info('App', `Master [${process.pid}] is running`);
let workers = new Set();
let forkWorker = () => {
let worker = cluster.fork();
workers.add(worker);
log.info('App', `Forked worker ${worker.process.pid}`);
};
// Fork workers.
initElasticSearch()
.then(started => {
if (started) {
log.verbose('App', `ElasticSearch setup checked`);
}
})
.catch(err => {
log.error('App', `ElasticSearch setup failed: ${err.message}${err.meta?.statusCode ? ` (${err.meta?.statusCode})` : ''}`);
})
.finally(() => {
for (let i = 0; i < processCount; i++) {
forkWorker();
}
});
cluster.on('exit', worker => {
log.info('App', `Worker ${worker.process.pid} died`);
workers.delete(worker);
setTimeout(forkWorker, 1000);
});
config.on('reload', () => {
workers.forEach(child => {
try {
child.kill('SIGHUP');
} catch (E) {
//ignore
}
});
});
} else {
if (config.ident) {
process.title = config.ident + ' worker';
}
require('./worker.js');
}
}
process.on('unhandledRejection', err => {
log.error('App', 'Unhandled rejection: %s', (err && err.stack) || err);
errors.notify(err);
});
process.on('SIGHUP', () => {
// generate memory dump
log.info('Process', 'PID=%s Generating heap snapshot...', process.pid);
let stream;
try {
stream = v8.getHeapSnapshot();
} catch (err) {
log.error('Process', 'PID=%s Failed to generate heap snapshot: %s', process.pid, err.stack || err);
return;
}
if (stream) {
const path = Path.join(
os.tmpdir(),
`Heap-${process.pid}-${new Date()
.toISOString()
.substring(0, 19)
.replace(/[^0-9T]+/g, '')}.heapsnapshot`
);
let f;
try {
f = fs.createWriteStream(path);
} catch (err) {
log.error('Process', 'PID=%s Failed to generate heap snapshot: %s', process.pid, err.stack || err);
return;
}
f.once('error', err => {
log.error('Process', 'PID=%s Failed to generate heap snapshot: %s', process.pid, err.stack || err);
});
stream.once('error', err => {
log.error('Process', 'PID=%s Failed to generate heap snapshot: %s', process.pid, err.stack || err);
});
stream.pipe(f);
f.once('finish', () => {
log.info('Process', 'PID=%s Generated heap snapshot: %s', process.pid, path);
});
}
});