要实践这个主题首先你先准备下环境：

1. python3.X ,对应 pip,python3-venv(我的是3.8.5）

2. 配置awscli （参考这里）

3. git 环境

 

进入正题：

1. 下载应用代码。

#下载这次部署的demo ,python flask,face_recognition代码 来检查人脸的相识度
$mkdir /opt/tech
$cd /opt/tech

$root@VM-0-3-ubuntu:/opt/tech# git clone -b master https://github.com/AngusZhu/flaskdemo.git
Cloning into 'flaskdemo'...
remote: Enumerating objects: 11, done.
remote: Counting objects: 100% (11/11), done.
remote: Compressing objects: 100% (8/8), done.
remote: Total 11 (delta 0), reused 8 (delta 0), pack-reused 0
Unpacking objects: 100% (11/11), done.

$tree ./
./
├── flaskdemo.py
├── requirements.txt
├── templates
│   └── upload.html
└── zappa_settings.json

2. 安装python虚拟隔离环境

$python3 -m venv .env
#然后激活,执行后，会多一个.env目录，这个目录下是虚拟的环境
$source .env/bin/activate

3. 安装依赖

#查看依赖的文件
$more requirements.txt
flask
zappa
face_recognition

#安装依赖
$pip3 install -r requirements.txt

#安装后，可以看到有以下文件及目录
$cd .env && ls
bin        include    lib        pyvenv.cfg

#.env/lib/python3.8/site-packages 目录下，可以看到依赖已经安装上了
$ ls zappa* face_recognition flask*
face_recognition:
__init__.py             __pycache__             api.py                  face_detection_cli.py   face_recognition_cli.py

flask:
__init__.py     __pycache__     app.py          cli.py          ctx.py          globals.py      json            sessions.py     templating.py   views.py
__main__.py     _compat.py      blueprints.py   config.py       debughelpers.py helpers.py      logging.py      signals.py      testing.py      wrappers.py

zappa:
__init__.py     async.py        cli.py          ext             letsencrypt.py  policies.py     wsgi.py
__pycache__     asynchronous.py core.py         handler.py      middleware.py   utilities.py

zappa-0.52.0.dist-info:
INSTALLER        LICENSE          METADATA         RECORD           WHEEL            entry_points.txt top_level.txt

4.  初始化zappa 

$zappa init
███████╗ █████╗ ██████╗ ██████╗  █████╗
╚══███╔╝██╔══██╗██╔══██╗██╔══██╗██╔══██╗
  ███╔╝ ███████║██████╔╝██████╔╝███████║
 ███╔╝  ██╔══██║██╔═══╝ ██╔═══╝ ██╔══██║
███████╗██║  ██║██║     ██║     ██║  ██║
╚══════╝╚═╝  ╚═╝╚═╝     ╚═╝     ╚═╝  ╚═╝

Welcome to Zappa!

Zappa is a system for running server-less Python web applications on AWS Lambda and AWS API Gateway.
This `init` command will help you create and configure your new Zappa deployment.
Let's get started!

按引导配置后，生成类似配置zappa_settings.json
 

$more zappa_settings.json
{
    "dev": {
        "app_function": "flaskdemo.app",
        "aws_region": "ap-northeast-1",
        "profile_name": "default",
        "project_name": "flaskdemo",
        "runtime": "python3.8",
        "s3_bucket": "angus-serverless"
    }
}

5. 部署应用到亚马逊 serverless 
 首次部署,dev 对应刚才对应的zappa 里面的配置

$zappa deploy dev

后续更新

 $zappa update dev

$部署后可以通过Zappa tail 查看部署日志

$zappa tail

6. 成功，有类似这样的提示

7. 跑一下看下

结果意外的时，程序看何广智，还真跟杰伦有点像，CXK就不像了。