This document discusses introducing serverless architectures to Python projects. It begins by showing the growth in popularity of serverless technologies. It then discusses using AWS Lambda for periodic scripts, tasks, and small HTTP APIs. It provides code examples of packaging and deploying Python code to AWS Lambda. It also discusses using services like AWS Lambda, CloudWatch Events and Celery to run periodic tasks like backups and reports. Overall it presents serverless as a way to run scripts, tasks and small APIs without managing servers.

1. Introduciendo Serverless en
Proyectos Python
Carlos Hernando
@chernando

2. Serverless Hype!
https://trends.google.com/trends/explore?date=2014-01-01%202017-08-27&q=serverless

5. Serverless

6. Saas / BaaS

7. Está usted aquí
Nuestra Aplicación

8. def handler(event, context):
# PONGA SU CÓDIGO AQUÍ
return
AWS Lambda

9. Serverless

10. https://aws.amazon.com/serverless/

11. Arquitectura Serverless
https://medium.com/cloud-academy-inc/serverless-beyond-functions-cd81ee4c6b8d

12. Escenarios

13. Scripts de “mantenimiento”

15. AWS Lambda

16. def handler(event, context):
# PONGA SU CÓDIGO AQUÍ
return

18. AWS Lambda
Desarrolladores
Credenciales
Base de datos
Servidores

19. Empaquetar
$ cd venv/lib/python3.6/site-packages/
$ zip -r9 ../../../../deploy.zip *
$ cd -
$ zip -g deploy.zip *.py

20. Crear Lambda
$ aws lambda create-function
--region eu-west-1
--function-name SimpleScript
--zip-file fileb://deploy.zip
--role arn:aws:iam::XXX:role/MyLambdaRole
--vpc-config SubnetIds=XXX,SecurityGroupIds=XXX
--handler handler.handler
--runtime python3.6
--profile personal
--timeout 10
--memory-size 512

21. Actualizar Lambda
$ aws lambda update-function-code
--region eu-west-1
--function-name SimpleScript
--zip-file fileb://deploy.zip
--profile personal

22. Aprendizajes

23. Tareas periódicas

24. # Crontab
30 08 10 06 * /root/full-backup
00 11,16 * * * /root/incremental-backup
00 09-18 * * * /root/check-db-status
00 09-18 * * 1-5 /root/send-updates
*/10 * * * * /root/consolidate-reports
@yearly /root/annual-maintenance
@monthly /root/steal-money

25. Celery workers
Celery Beat

27. Celery Beat
Celery workers

28. AWS
Lambda
Cloudwatch
Events
Celery workers

29. def handler(event, context):
# PONGA SU CÓDIGO AQUÍ
return

30. >>> from tasks import add
>>> add.delay(4, 4)

31. >>> from celery import Celery
>>> app = Celery(broker=broker)
>>> app.send_task('tasks.add', args=[4,4])

33. https://serverless.com

34. functions:
celeryless:
handler: celeryless.handler
events:
- schedule:
rate: rate(10 minutes)
input:
task: tasks.add
args: [4, 4]

35. Aprendizajes

36. APIs a pequeña escala

38. API Gateway AWS Lambda

40. SAM: Serverless Application Model
https://github.com/awslabs/serverless-application-model

41. https://github.com/aws/chalice

42. from flask import Flask
app = Flask(__name__)
@app.route("/")
def index():
return "Hello World!"

43. from chalice import Chalice
app = Chalice(app_name="helloworld")
@app.route("/")
def index():
return {"hello": "world"}

44. Aprendizajes

45. Eventos encadenados

46. Serverless Image resizing (AWS Lambda and AWS s3)
http://blog.kaliloudiaby.com/index.php/serverless-image-resizing-aws-lambda-and-aws-s3/

47. De $0,20 a $834

48. 14 horas
$425
25.000.000 GB/s (290 días)
37.000.000 Invocaciones
AWS Lambda

50. Serverless
Scripts Periódicos API HTTP

51. https://www.wdl.org/en/item/576/

52. Documentación de la charla:
https://bit.ly/pymad0917
Carlos Hernando
@chernando

53. •Photo by Chris Lawton
on Unsplash
•Photo by Maarten van
den Heuvel on Unsplash
•Photo by Markus Spiske
on Unsplash
•Photo by Teresa Kluge
on Unsplash
•Photo by Dan Paul on
Unsplash
•Photo by Mike Alonzo
on Unsplash
Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
https://creativecommons.org/licenses/by-sa/4.0/
Imágenes cortesía de: