node.js - 从外部信号正常关闭 Node.js 程序的最佳做法是什么？

Question

从外部信号正常退出 Node.js 程序的最佳做法是什么？

我目前在我的代码中使用它:

process.on( 'SIGINT', function() {
  console.log( "\ngracefully shutting down from  SIGINT (Crtl-C)" )
  // some other closing procedures go here
  process.exit( )
})

Answer 1

希望此模板有所帮助。我从 Simon Holmes 的书 Getting MEAN 中得到了大部分内容。归功于他。

var mongoose = require( 'mongoose' );
var gracefulShutdown;
var dbURI = 'mongodb://localhost/xxx';
if (process.env.NODE_ENV === 'production') {
  dbURI = process.env.MONGOLAB_URI;
}

mongoose.connect(dbURI);

// CONNECTION EVENTS
mongoose.connection.on('connected', function () {
  console.log('Mongoose connected to ' + dbURI);
});
mongoose.connection.on('error',function (err) {
  console.log('Mongoose connection error: ' + err);
});
mongoose.connection.on('disconnected', function () {
  console.log('Mongoose disconnected');
});

// CAPTURE APP TERMINATION / RESTART EVENTS
// To be called when process is restarted or terminated
gracefulShutdown = function (msg, callback) {
  mongoose.connection.close(function () {
    console.log('Mongoose disconnected through ' + msg);
    callback();
  });
};
// For nodemon restarts
process.once('SIGUSR2', function () {
  gracefulShutdown('nodemon restart', function () {
    process.kill(process.pid, 'SIGUSR2');
  });
});
// For app termination
process.on('SIGINT', function() {
  gracefulShutdown('app termination', function () {
    process.exit(0);
  });
});
// For Heroku app termination
process.on('SIGTERM', function() {
  gracefulShutdown('Heroku app termination', function () {
    process.exit(0);
  });
});
// TODO : For Modulus app termination

// BRING IN YOUR SCHEMAS & MODELS.
require('./yyy');