分布式系统的核心是分布式通信，而传统上开发一套支持上千台规模集群，可靠性非常高的分布式通信框架，需要不少的精力投入。而在多数情景下，我们（特别是时间宝贵的OP）并不是非常关注技术实现的细节，而是希望有一套成熟、轻量、可靠性高、使用方便而且易于调试的分布式通信框架，可以直接使用，从而把时间放在具体业务逻辑上。
在PyCon 2012大会上，dotcloud公司开源了一套基于ZeroMQ和MessagePack的分布式通信框架（或者说是协议+Python实现）。该框架因为基于ZeroMQ，使用方法是RPC，所以被命名为ZeroRPC。ZeroRPC的特点在其官网的介绍中一目了然[1]：
ZeroRPC is a light-weight, reliable and language-agnostic library for distributed communication between server-side processes.
| from flask import Flask, request, redirect, url_for, make_response, abort | |
| from werkzeug import secure_filename | |
| from pymongo import Connection | |
| from pymongo.objectid import ObjectId | |
| from gridfs import GridFS | |
| from gridfs.errors import NoFile | |
| ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif']) | |
| DB = Connection().gridfs_server_test | |
| FS = GridFS(DB) |
| # Copyright (c) 2010, Philip Plante of EndlessPaths.com | |
| # | |
| # Permission is hereby granted, free of charge, to any person obtaining a copy | |
| # of this software and associated documentation files (the "Software"), to deal | |
| # in the Software without restriction, including without limitation the rights | |
| # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| # copies of the Software, and to permit persons to whom the Software is | |
| # furnished to do so, subject to the following conditions: | |
| # | |
| # The above copyright notice and this permission notice shall be included in |
| - What do Etcd, Consul, and Zookeeper do? | |
| - Service Registration: | |
| - Host, port number, and sometimes authentication credentials, protocols, versions | |
| numbers, and/or environment details. | |
| - Service Discovery: | |
| - Ability for client application to query the central registry to learn of service location. | |
| - Consistent and durable general-purpose K/V store across distributed system. | |
| - Some solutions support this better than others. | |
| - Based on Paxos or some derivative (i.e. Raft) algorithm to quickly converge to a consistent state. | |
| - Centralized locking can be based on this K/V store. |
| /* | |
| 12306 Auto Query => A javascript snippet to help you book tickets online. | |
| Copyright (C) 2011-2012 Jingqin Lynn | |
| Includes jQuery | |
| Copyright 2011, John Resig | |
| Dual licensed under the MIT or GPL Version 2 licenses. | |
| http://jquery.org/license | |
| Includes Sizzle.js |
| #! /bin/sh | |
| ### BEGIN INIT INFO | |
| # Provides: supervisord | |
| # Required-Start: $remote_fs | |
| # Required-Stop: $remote_fs | |
| # Default-Start: 2 3 4 5 | |
| # Default-Stop: 0 1 6 | |
| # Short-Description: Example initscript | |
| # Description: This file should be used to construct scripts to be | |
| # placed in /etc/init.d. |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 Mathieu 'p01' Henri - http://www.p01.org/releases/ | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE |
| from pprint import pformat | |
| from typing import Any | |
| from pygments import highlight | |
| from pygments.formatters import Terminal256Formatter | |
| from pygments.lexers import PythonLexer | |
| def pprint_color(obj: Any) -> None: | |
| """Pretty-print in color.""" |