Nodejs 应用部署小记

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var accessLogfile = fs.createWriteStream('access.log', {flags: 'a'});

app.configure(function() {
    app.use(express.logger({stream: accessLogfile}));
}

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var fs = require('fs');
var errorLogfile = fs.createWriteStream('logs/error.log', {flags: 'a'});

exports.handler = function(err, req, res, status) {
      console.log(err);

      var meta = '[' + new Date() + '] ' + req.url + ' ' + status + '\n';
      errorLogfile.write(meta + err.stack + '\n');

      res.status(status);
      res.end('');
}

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function(req, res) {
      error.handler(err, req, res, 500);
}

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var cluster = require('cluster');
var os = require('os');

// 获取 CPU 的数量
var numCPUs = os.cpus().length;

var workers = {};
if (cluster.isMaster) {
      // 主进程分支
      cluster.on('death', function(worker) {
        // 当一个工作进程结束时，重启工作进程
        delete workers[worker.pid];
        worker = cluster.fork();
        workers[worker.pid] = worker;
      });
      // 初始开启与 CPU 数量相同的工作进程
      for ( var i = 0; i < numCPUs; i++) {
        var worker = cluster.fork();
        workers[worker.pid] = worker;
      }
} else {
      // 工作进程分支，启动服务器
      var app = require('./app');
      app.listen(app.get('port'), function() {
        console.log('Server listening on port %d in %s mode', app.get('port'), app.get('env'));
      });
}

// 当进程被终止时，关闭所有工作进程
process.on('SIGTERM', function() {
      for ( var pid in workers) {
        process.kill(pid);
      }
      process.exit(0);
});

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#! /bin/bash

NODE_ENV=production
DAEMON="node cluster.js"
NAME=name
PIDFILE="name.pid"

case "$1" in
  start)
        echo "Starting $NAME."
        nohup $DAEMON >/dev/null 2>/dev/null &
        echo $! > $PIDFILE
        ;;
  stop)
        echo "Stopping $NAME."
        pid=`cat $PIDFILE`
        kill $pid
        rm $PIDFILE
        ;;
  status)
      ps -ef | grep nodejs
      ;;
    esac

    exit 0