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DevOps Python tools to get started

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DevOps is … “… development and operations teams work on software releases in tandem, rather than throwing code back and forth across a silo.”

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Make no mistake DevOps is a culture In [1]: “tools make a culture” Out [1]: False

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Background

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Perspective Startup culture, but tools are useful everywhere

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Carousell P2P Marketplace App iOS, Android (Web?)

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Pony Powered Django + Django Rest Framework

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Not too long ago 1 Technical Co-founder ! Edits code on production server Live reload

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Moments ago 4 Engineers: iOS, Android, CTO, Backend + Infrastructure ! Every engineer somewhat involved with Backend code

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TODO • Deploy • Monitor Make it easy to: • Break things Make it difficult to:

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Deployment

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Deployment options - Fabric + git / svn /… ! - Salt / Ansible / Chef ! - Native packaging (.rpm, .deb)

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Fabric (i) from fabric.api import env, run ! hosts = [‘app.server.com’] ! def deploy(): run(“git pull && … ”) fabfile.py

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Fabric (ii) $ fab deploy [app.server.com] run: git pull && … [app.server.com] out: [output]

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Fabric: the good parts Simple, easy to start with ! @parallel to speed up for multiple servers

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Salt Configuration management, commonly used for server provisioning ! Chef, Puppet, etc

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Salt + Git

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Fabric + Salt + Git fab deploy salt “app*.server.com” … app1.server.com app2.server.com

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TODO • Deploy • Monitor Make it easy to: • Break things Make it difficult to:

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Monitor and Control

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Controlling processes Tools: Supervisor, Circus Allows you to control and monitor your app processes

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Supervisor (i) [program:my_app] command=python my_app.py

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Supervisor (ii) $ supervisorctl status my_app RUNNING pid 7910, uptime 01:36:44

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Supervisor (iii) Supervisor exposes a XMLRPC interface Allows remote monitoring and control of processes

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TODO • Deploy • Monitor Make it easy to: • Break things Make it difficult to:

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Continuous Integration

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Continuous Integration Popular CIs: Jenkins, TravisCI, CircleCI

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http://buildbot.net/

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Jenkins + Django

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Automated Feedback

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Done! • Deploy • Monitor Make it easy to: • Break things Make it difficult to:

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All together now

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Github Workflow Pull Request Continuous Integration Automatic Deployment

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pull request Jenkins CI Test Deployment Report on Github salt [success] [fail]

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Beyond Python Docker Vagrant Virtual Machines! (LXC) Containers!

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Thanks! @victorneo (psst. we are looking for web devs)