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app.js
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app.js
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'use strict';
const http = require('http');
const https = require('https');
const path = require('path');
const semver = require('semver');
// TODO: research it it's still needed
const setICUEnvVariable = require('./lib/utils/icu-data-env-setter');
// This function should be called before the require('yargs').
setICUEnvVariable();
const argv = require('yargs')
.usage('Usage: node $0 <environment> [options]')
.help('h')
.example(
'node $0 production -c /etc/windshaft-cartodb/config.js',
'start server in production environment with /etc/windshaft-cartodb/config.js as config file'
)
.alias('h', 'help')
.alias('c', 'config')
.nargs('c', 1)
.describe('c', 'Load configuration from path')
.argv;
const environmentArg = argv._[0] || process.env.NODE_ENV || 'development';
let configFileName = environmentArg;
if (process.env.CARTO_WINDSHAFT_ENV_BASED_CONF) {
// we override the file with the one with env vars
configFileName = 'config';
}
const configurationFile = path.resolve(argv.config || `./config/environments/${configFileName}.js`);
global.environment = require(configurationFile);
process.env.NODE_ENV = argv._[0] || process.env.NODE_ENV || global.environment.environment;
if (global.environment.uv_threadpool_size) {
process.env.UV_THREADPOOL_SIZE = global.environment.uv_threadpool_size;
}
// set global HTTP and HTTPS agent default configurations
// ref https://nodejs.org/api/http.html#http_new_agent_options
const agentOptions = Object.assign({
keepAlive: false,
keepAliveMsecs: 1000,
maxSockets: Infinity,
maxFreeSockets: 256
}, global.environment.httpAgent || {});
http.globalAgent = new http.Agent(agentOptions);
https.globalAgent = new https.Agent(agentOptions);
// Include cartodb_windshaft only _after_ the "global" variable is set
// See https://github.com/Vizzuality/Windshaft-cartodb/issues/28
const createServer = require('./lib/server');
const serverOptions = require('./lib/server-options');
const { logger } = serverOptions;
const availableEnvironments = {
production: true,
staging: true,
development: true
};
if (!availableEnvironments[process.env.NODE_ENV]) {
logger.fatal(new Error(`Invalid environment ${process.env.NODE_ENV} argument, valid ones: ${Object.keys(availableEnvironments).join(', ')}`));
process.exit(1);
}
const { engines } = require('./package.json');
if (!semver.satisfies(process.versions.node, engines.node)) {
logger.fatal(new Error(`Node version ${process.versions.node} is not supported, please use Node.js ${engines.node}.`));
process.exit(1);
}
const server = createServer(serverOptions);
// Specify the maximum length of the queue of pending connections for the HTTP server.
// The actual length will be determined by the OS through sysctl settings such as tcp_max_syn_backlog and somaxconn on Linux.
// The default value of this parameter is 511 (not 512).
// See: https://nodejs.org/docs/latest/api/net.html#net_server_listen
const backlog = global.environment.maxConnections || 128;
const listener = server.listen(serverOptions.bind.port, serverOptions.bind.host, backlog);
const { version, name } = require('./package');
listener.on('listening', function () {
const { address, port } = listener.address();
logger.info({ 'Node.js': process.version, pid: process.pid, environment: process.env.NODE_ENV, [name]: version, address, port, config: configurationFile }, `${name} initialized successfully`);
});
function getCPUUsage (oldUsage) {
let usage;
if (oldUsage && oldUsage._start) {
usage = Object.assign({}, process.cpuUsage(oldUsage._start.cpuUsage));
usage.time = Date.now() - oldUsage._start.time;
} else {
usage = Object.assign({}, process.cpuUsage());
usage.time = process.uptime() * 1000; // s to ms
}
usage.percent = (usage.system + usage.user) / (usage.time * 10);
Object.defineProperty(usage, '_start', {
value: {
cpuUsage: process.cpuUsage(),
time: Date.now()
}
});
return usage;
}
let previousCPUUsage = getCPUUsage();
setInterval(function cpuUsageMetrics () {
const CPUUsage = getCPUUsage(previousCPUUsage);
Object.keys(CPUUsage).forEach(property => {
global.statsClient.gauge(`windshaft.cpu.${property}`, CPUUsage[property]);
});
previousCPUUsage = CPUUsage;
}, 5000).unref();
setInterval(function () {
var memoryUsage = process.memoryUsage();
Object.keys(memoryUsage).forEach(function (k) {
global.statsClient.gauge('windshaft.memory.' + k, memoryUsage[k]);
});
}, 5000).unref();
if (global.gc) {
var gcInterval = Number.isFinite(global.environment.gc_interval)
? global.environment.gc_interval
: 10000;
if (gcInterval > 0) {
setInterval(function gcForcedCycle () {
global.gc();
}, gcInterval).unref();
}
}
const gcStats = require('gc-stats')();
gcStats.on('stats', function ({ pauseMS, gctype }) {
global.statsClient.timing('windshaft.gc', pauseMS);
global.statsClient.timing(`windshaft.gctype.${getGCTypeValue(gctype)}`, pauseMS);
});
function getGCTypeValue (type) {
// 1: Scavenge (minor GC)
// 2: Mark/Sweep/Compact (major GC)
// 4: Incremental marking
// 8: Weak/Phantom callback processing
// 15: All
let value;
switch (type) {
case 1:
value = 'Scavenge';
break;
case 2:
value = 'MarkSweepCompact';
break;
case 4:
value = 'IncrementalMarking';
break;
case 8:
value = 'ProcessWeakCallbacks';
break;
case 15:
value = 'All';
break;
default:
value = 'Unkown';
break;
}
return value;
}
const exitProcess = logger.finish((err, finalLogger, listener, signal, killTimeout) => {
scheduleForcedExit(killTimeout, finalLogger);
finalLogger.info(`Process has received signal: ${signal}`);
let code = 0;
if (err) {
code = 1;
finalLogger.fatal(err);
}
finalLogger.info(`Process is going to exit with code: ${code}`);
listener.close(() => process.exit(code));
});
function addHandlers (listener, killTimeout) {
process.on('uncaughtException', (err) => exitProcess(err, listener, 'uncaughtException', killTimeout));
process.on('unhandledRejection', (err) => exitProcess(err, listener, 'unhandledRejection', killTimeout));
process.on('ENOMEM', (err) => exitProcess(err, listener, 'ENOMEM', killTimeout));
process.on('SIGINT', () => exitProcess(null, listener, 'SIGINT', killTimeout));
process.on('SIGTERM', () => exitProcess(null, listener, 'SIGTERM', killTimeout));
}
addHandlers(listener, 45000);
function scheduleForcedExit (killTimeout, finalLogger) {
// Schedule exit if there is still ongoing work to deal with
const killTimer = setTimeout(() => {
finalLogger.info('Process didn\'t close on time. Force exit');
process.exit(1);
}, killTimeout);
// Don't keep the process open just for this
killTimer.unref();
}