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Python on Cloud Foundry

Ian Huston, Data Scientist

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Who am I?

�  Ian Huston

� @ianhuston

� github.com/ihuston

� www.ianhuston.net

� Talk resources: http://tinyurl.com/pythonCF

� Data Scientist

� Use PyData stack for predictive analytics and machine learning

� Previously a theoretical physicist using Python for numerical simulations & HPC

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What is Cloud Foundry?

http://cloudfoundry.org

Open Source Cloud Platform

Simple App Deployment, Scaling & Availability

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Cloud Foundry Foundation: Industry Standard

Gold

Silver

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CF for data scientists & developers Easily deploy your web app

cf  push  Scale up and out quickly

cf  scale  myapp  –i  5  –m  1G  Create and bind services

cf  bind-­‐service  myapp  redis  

 

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mod proxy

1.  The platform takes care of all the steps on the left automatically

50 Configuration Touches

1.  Register Hostname with DNS (1) 2.  Configure F5 Load Balancing Group (2) 3.  Configure Apache HTTPd Worker Pool (4) 4.  Configure mod_proxy Connector Routing (4) 5.  Configure Tomcat Connector Pool (40)

1 Configuration Touch

1 2 4 4 40 1

Cloud Foundry: From 50 touch points to 1

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Python & CF

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Python on Cloud Foundry

� First class language (with Go, Java, Ruby, Node.js, PHP)

� Automatic app type detection

� Buildpack takes care of –  Installing Python interpreter –  Installing packages in requirements.txt using pip –  Starting web app as requested (e.g. python myapp.py)

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Simple Flask App Demo � Simple one page “Hello World” web app

� Video: https://www.youtube.com/watch?v=QOfD6tnoAB8

� Demonstrates: –  Installation of requirements –  Scaling properties

� Need to Provide: –  App files –  Dependencies listed in requirements.txt file –  Optional manifest.yml file with configuration for deployment

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Data Services

� Easy to bind and scale services –  Databases, NoSQL, message queues etc. $  cf  create-­‐service  rediscloud  PLAN_NAME  INSTANCE_NAME  $  cf  bind-­‐service  APP_NAME  INSTANCE_NAME  

� Details provided in VCAP_APP_SERVICES env variable: {  "rediscloud":  [          {  "name":  "rediscloud-­‐42",  "label":  "rediscloud",  "plan":  "20mb",              "credentials":  {  "port"":  "6379",    

 "hostname":  "pub-­‐redis-­‐6379.us-­‐east-­‐1-­‐2.3.ec2.redislabs.com",                  "password":  "your_redis_password”    }    }  ]  }  

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Services now available These are available on Pivotal CF (Pivotal’s packaged Cloud Foundry offering).

See http://run.pivotal.io for the services available on Pivotal Web Services.

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PyData stack on CF: conda  +    

•  Use (mini)conda to provide Python & package installation

•  Quickly install needed PyData packages •  Can even provision your own IPython notebook

server [at your own risk!]

CF Buildpack: https://github.com/ihuston/python-conda-buildpack

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Why?

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Benefits for Data Scientists

� Easy to get web apps up and running

� Create and bind to your favourite data services

� Don’t get locked in to one cloud provider

� Python is officially supported

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Try Cloud Foundry today!

Pivotal Web Services: http://run.pivotal.io IBM Bluemix: http://bluemix.net Anynines: http://anynines.com

HP Helion: http://horizon.hpcloud.com

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More info and resources

� Material for this talk: http://tinyurl.com/pythonCF

� Cloud Foundry: http://cloudfoundry.org

� Flask Mega Meta Tutorial for DS: http://tinyurl.com/flaskDS

� Twelve Factor Apps: http://12factor.net/

� Meetups: http://cloud-foundry.meetup.com/

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Appendix Docker & Cloud Foundry

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Docker joins the Cloud Foundry Foundation in May 2014 to support Cloud Foundry open governance and advance the state of containers in Platform as a Service

CF and Docker

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Docker Benefit: Customize More Layers of the App

runtime layer

OS image

application layer

Docker

system brings fixed host OS Kernel

* Devs may bring a custom buildpack

runtime layer*

OS image

application layer

Buildpack

system brings fixed host OS Kernel

App container

System Provides

Dev Provides

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Coming soon to Cloud Foundry � Planned to support Cloud Foundry apps from: –  Linux Buildpacks –  Windows .NET Buildpacks powered by Iron Foundry –  Docker images

� Docker applications will work similar to apps from buildpacks –  Same scaling & services bindings, same CLI commands push etc