Introduciendo Serverless en Proyectos Python

Charla para Python Madrid, Septiembre de 2017.

En esta charla citaremos las ventajas de Serverless y nos centraremos en las situaciones en las que podemos introducirlo dentro de nuestros proyectos Python. Utilizaremos AWS Lambda para los ejemplos.

Vídeo de la charla en https://youtu.be/BPJI2zApuug

Transcript

1. Introduciendo Serverless en
   Proyectos Python
   Carlos Hernando
   @chernando
   

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

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5. Serverless
   

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6. Saas / BaaS
   

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7. Está usted aquí
   Nuestra Aplicación
   

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

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9. Serverless
   

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

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

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12. Escenarios
    

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13. Scripts de “mantenimiento”
    

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15. AWS Lambda
    

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

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18. AWS Lambda
    Desarrolladores
    Credenciales
    Base de datos
    Servidores
    

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

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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
    

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

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22. Aprendizajes
    

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23. Tareas periódicas
    

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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
    

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25. Celery workers
    Celery Beat
    

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27. Celery Beat
    Celery workers
    

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28. AWS
    Lambda
    Cloudwatch
    Events
    Celery workers
    

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

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

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

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33. https://serverless.com
    

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

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35. Aprendizajes
    

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36. APIs a pequeña escala
    

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38. API Gateway AWS Lambda
    

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

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

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

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

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44. Aprendizajes
    

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45. Eventos encadenados
    

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

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47. De $0,20 a $834
    

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

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50. Serverless
    Scripts Periódicos API HTTP
    

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

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

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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:
    

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