The document discusses how to build a RESTful API using the Serverless framework on AWS. It introduces the Amazon API Gateway for creating API endpoints and AWS Lambda for hosting backend functions. The Serverless framework simplifies deploying Lambda functions by packaging code and dependencies, testing functions locally, and deploying with a single command. It also addresses challenges like installing Python libraries and supporting non-Python modules through Docker.

1. Build a RESTfull API with the
Serverless framework
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2. Introduction
1. Introduce myself
2. perpose of this presentation
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3. Introduce myself
• Masato Nakamura
• twitter: masahito
• github: masahitojp
• work at Nulab inc. Typetalk team
• use Scala and JavaScript and Python
• Python ❤ and
☕
❤
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4. Perpose of this presentation
• You can understand buid a REST API with the
Serverless Framework
• I will talk especially for the AWS services
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5. Not covering today
• Technical Details
• AWS knowledge(IAM etc)
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6. Today I will talk about following
things
• How to create an RESTful API with the Amazon API
Gateway
• How to use the Serverless Framework
• How to make deployment easier
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7. How to create RESTful API
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8. How to create RESTful API
1. Where to use RESTful API?
2. What is the Amazon API Gateway
3. What is AWS Lambda
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9. Where to use RESTful API?
• Upload File to the Amazon S3
• Send Message to a service
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10. Target
• You use CMS
• You want to make API more easily
• I want you to introduce the Amazon API Gateway
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11. What is the Amazon API Gateway
API creation, application communication gateway.
Create an endpoint.
It is created from the management console of AWS.
We do not write actual code.
It also has an authentication function, it separates
the environment, deploys and scales.
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12. What is the AWS Lambda
A service that executes code.
Create a function called Lambda function and write
code.
You can write it directly in the AWS management
console, but basically upload the code.
You can write even code, AWS Lamvs provide
manage servers, scaling, logging.
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13. What you can do with combining
We can create RESTful API ❤
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14. Flow of API creation
1. create the Amazon API Gateway
2. create AWS Lambda funtion
3. connect AWS GateWay & AWS Lambda funtion
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15. 1). create the Amazon API Gateway
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16. 2). create AWS Lambda funtion
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17. 3). connect the Amazon API Gateway & AWS Lambda
funtion
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18. Next
I want to talk about the AWS Lambda
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19. How to use the Serverless
framework
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20. How to use the Serverless
framework
1. How to deploy AWS Lambda function.
2. Introduce the Serverless Framework
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21. Target
• Python newbie
• use or used the AWS Lambda
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22. Goal
•
!
Easy to use AWS Lambda for Python
• When you write Code, You can update easily
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23. can register at AWS console
• Write Code
• Run Test
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24. When used only once This is enough
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25. • example: POST JSON -> send message to Chat
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26. • example: POST JSON -> send message to Chat
•
!
We want to use a 3rd Party lib
• requests
• add requirements.txt
requests
• run
$ pip install -r requirements.txt -t vendor/
$ edit python-file
$ zip /path/to/service-dir
$ aws lambda ~~
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27. It's troublesome to do with the
AWS console
!
use 3rd party libraries
!
Especially when using C-API
!
Code version control (git etc)
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28. Deploy to the AWSLambda
• Deployment using ZipFile is possible
!
Code version control (git etc)
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29. • Deployment using ZipFile is possible
$ aws lambda create-function
--function-name AccessMemCache
--region us-east-1
--zip-file fileb://path-to/app.zip
--role execution-role-arn
--handler app.handler
--runtime python3.6
--timeout 30
--vpc-config SubnetIds=comma-separated-vpc-subnet-ids,SecurityGroupIds=default-security-group-id
--memory-size 1024
https://docs.aws.amazon.com/ja_jp/lambda/latest/
dg/vpc-ec-upload-deployment-pkg.html
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30. I want to make it easier
!
Create a zipfile each time you change -> deploy
!
Run test locally
• What we need now
$ edit python-file
$ (pip install ~~)
$ zip /path/to/service-dir
$ aws lambda ~~
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31. Introduce the Serverless Framework
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32. What is the Serverless Framework?
• http://www.serverless.com
Serverless Framework – Build web, mobile and IoT
applications with serverless architectures using AWS
Lambda, Azure Functions, Google CloudFunctions &
more!
• AWS Lambda, Azure Functions, Google
CloudFunctions を使ってサーバレスアーキテク
チャで web, Mobile IoT アプリケーションを作ろう
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33. Description of the Serverless Framework
• pros
!!
Code version control(git / svn / Hg)
!
zip -> deploy is possible by executing Only 1
command
!
manage CloudWatch/ AWS IAM
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34. Use the Serverless Framework
How to create environments
$ npm instal -g serverless
$ sls -v
1.32.0
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35. create AWS Lambda with the Serverless Framework
$ sls create -t aws-python3 -p py3-hello
Serverless: Generating boilerplate...
Serverless: Generating boilerplate in "/Users/masahito-nulab/src/jobs/typetalk-serverless-internal/py3-hello"
_______ __
| _ .-----.----.--.--.-----.----| .-----.-----.-----.
| |___| -__| _| | | -__| _| | -__|__ --|__ --|
|____ |_____|__| ___/|_____|__| |__|_____|_____|_____|
| | | The Serverless Application Framework
| | serverless.com, v1.27.3
-------'
Serverless: Successfully generated boilerplate for template: "aws-python3"
$ tree py3-hello/
py3-hello/
!"" handler.py
#"" serverless.yml
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36. • handler.py
import json
def hello(event, context):
body = {
"message": "Go Serverless v1.0! Your function executed successfully!",
"input": event
}
response = {
"statusCode": 200,
"body": json.dumps(body)
}
return response
• serverless.yml
service: py3-hello
provider:
name: aws
runtime: python3.6
functions:
hello:
handler: handler.hello
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37. Run Test locally
$ cd py3-hello
$ sls invoke local -f hello
{
"statusCode": 200,
"body": "{"message": "Go Serverless v1.0! Your function executed successfully!", "input": {}}"
}
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38. Deploy to AWS Lambda
!
Deployment will be simplified after setting the
IAM/Role
$ sls deploy
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39. How to make deployment
easier
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40. How to make deployment easier
1. reduce troublesome for library installation
2. Non-Pure Python module
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41. Goal
• Easy to use AWS Lambda for Python
•
!
When you write Code, You can update easily
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43. reduce troublesome for library installation
!
required 3rd-party library installation
#
!
I often forget this
$ pip install -r requirement.txt -t vendor/
$ sls deploy
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44. reduce troublesome for library installation
Use serverless-framework plugin
• UnitedIncome/serverless-python-requirements
• serverless >= v1.12
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45. How to install this plugin
$ sls plugin install -n serverless-python-requirements
service: py3-hello
provider:
name: aws
runtime: python3.6
cfLogs: true
plugins:
- serverless-python-requirements
functions:
hello:
handler: handler.hello
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46. Deploy
($ sls requirements install)
$ sls deploy
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47. It is now possible to execute with a only 1 command !
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48. Non-Pure Python module
• Developers often use Windows / OSX for
development environment
• Python has lots of libraries written with C-API
• numpy , TensorFlow , Image Libraries: pillow etc
• Creating a zipfile locally does not work at AWS
Lambda
!
• The environment of AWS Lambda is Linux
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49. dockerize pip
Cross-compile in docker environment
• It uses docker image ”lambci / docker-lambda"
service: py3-hello
provider:
name: aws
runtime: python3.6
cfLogs: true
plugins:
- serverless-python-requirements
custom:
pythonRequirements:
dockerizePip: true
functions:
hello:
handler: handler.hello
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50. Today I talked about following things
• How to create an RESTful API with the Amazon API
Gateway
• How to use the Serverless Framework
• How to make deployment easier
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51. I hope you can write and
deploy RESTfull API ❤
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52. Thank you
@masahito
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53. Question?
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