mongodb数据库定时备份

dump.js

/*!
 * dump.js, dump mongodb.
 * Copyright(c) 2012 Taobao.com
 * Author: busi.hyy <busi.hyy@taobao.com>
 *
 * 每天凌晨3点从mongo dump一份到指定文件夹，前缀为20121113_
 * 只保留最近七天的dump文件
 * Example: `node dump 127.0.0.1:27071 back database collection1 collection2 ...`
 */

/**
 * module dependences
 */

var fs = require('fs');
var spawn = require('child_process').spawn;
var argv = process.argv;
var mongoHost = process.argv[2];
var baseDirName = process.argv[3];
var database = process.argv[4];

var keepTime = 7 * 24 * 3600 * 1000;  //保存七天的备份

function getDateString(date) {
  if (typeof date === 'number') {
    date = new Date(date);
  }
  return String(date.getFullYear()) + (date.getMonth() + 1) + date.getDate();
}

function handleDump(now) {
  var collectionIndex = 5;
  var removeDir = getDateString(now.getTime() - keepTime) + '_' + baseDirName; 
  doDump(collectionIndex, now);
  if (fs.existsSync(removeDir)) {
    spawn('rm', ['-rf', removeDir]);
  }  
}

function doDump(index, now) {
  var saveDir = getDateString(now) + '_' + baseDirName;
  var dumpArgvs = ['-h', mongoHost, '-o', saveDir];
  if (database) {
    dumpArgvs = dumpArgvs.concat(['-d', database]);
    var collection = process.argv[index];
    if (collection) {
      dumpArgvs = dumpArgvs.concat(['-c', collection]);
    }
  }
  spawn('mongodump', dumpArgvs).on('exit', function (code) {
    if (process.argv[++index]) {
      doDump(index, now);
    }
  });
}

setInterval(function () {
  var now = new Date();
  if (now.getHours() === 3) { //凌晨三点进行备份
    handleDump(now);
  }
}, 60 * 60 * 1000);

数据量有多大？还要看看当前磁盘容量是否能装得下。
不是所有表都dump吧？指定要dump那些数据库。

修改了。 可以指定数据库指定collections.

好吧，部署上去吧。