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Django on Heroku Michael Warkentin @mwarkentin Friday, 16 March, 12

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What is Heroku? Friday, 16 March, 12

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A Polyglot Platform as a Service Friday, 16 March, 12

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Ruby Friday, 16 March, 12

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Python Friday, 16 March, 12

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Node.js Friday, 16 March, 12

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Java Friday, 16 March, 12

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Why Heroku? Friday, 16 March, 12

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Empower your devs Friday, 16 March, 12

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Somewhere in Panama... Friday, 16 March, 12

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Friday, 16 March, 12

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Somewhere in Canada... Friday, 16 March, 12

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Friday, 16 March, 12

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1.5 hours from initial idea to functioning deployment Friday, 16 March, 12

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Over 30 addons including: • Redis • New Relic • Papertrail • RabbitMQ • Sentry • Sendgrid Friday, 16 March, 12

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Heroku Commands Friday, 16 March, 12

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Creating a new app heroku create --stack cedar Friday, 16 March, 12

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Deploying master to Heroku git push heroku master Friday, 16 March, 12

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Deploying a branch to Heroku git push heroku :master Friday, 16 March, 12

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Procfile web: python app/manage.py run_gunicorn -b 0.0.0.0:$PORT -w 3 worker: python app/manage.py celeryd Friday, 16 March, 12

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Viewing processes heroku ps Friday, 16 March, 12

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Scaling processes heroku ps:scale web=2 worker=4 Friday, 16 March, 12

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Setting config variables heroku config:add DEBUG=True Friday, 16 March, 12

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Tailing app logs heroku logs --tail Friday, 16 March, 12

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Database backup heroku pgbackups:capture Friday, 16 March, 12

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Copy production database to staging heroku pgbackups:restore DATABASE `heroku pgbackups:url --app app-prod` --app app-staging Friday, 16 March, 12

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Local development with gunicorn and foreman Friday, 16 March, 12

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Run local environment from the same Procfile Friday, 16 March, 12

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$ foreman start Friday, 16 March, 12

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Add local environment variables to .env file Friday, 16 March, 12

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What can we learn from Heroku? Friday, 16 March, 12

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http://www.12factor.net/ Friday, 16 March, 12

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Store config in the environment Friday, 16 March, 12

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No local_settings.py Friday, 16 March, 12

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AWS_SECRET_ACCESS_KEY =”F234324jskfj” Friday, 16 March, 12

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AWS_SECRET_ACCESS_KEY =”F234324jskfj” Friday, 16 March, 12

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AWS_SECRET_ACCESS_KEY = os.environ.get('AWS_SECRET_AC CESS_KEY') Friday, 16 March, 12

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New version created on: • Every code push • `git push heroku master` • Every config change • `heroku config:add DEBUG=True` Friday, 16 March, 12

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Live demo OMFG!!1 Friday, 16 March, 12

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Further reading • http://devcenter.heroku.com/articles/django • http://rdegges.com/devops-django-part-3-the-heroku-way • http://rdegges.com/devops-django-part-4-choosing- heroku • https://github.com/waveaccounting/public-site/pull/5 Friday, 16 March, 12

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Unanswered questions • Graceful reload of gunicorn for local development • Still cycling it manually when I make changes to .py files • How hard is it to use a custom buildpack? • https://github.com/bolster/heroku-buildpack-bolster/ commit/ae6dd97b9bdc9db29fd286f76f40d104c48b6a7c • Can we get Wave Accounting running on Heroku? Friday, 16 March, 12

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Photo Credits Ruby: http://www.flickr.com/photos/vissago/2691363050/ Python: http://www.flickr.com/photos/smb_flickr/5140800350/ Node.js: http://www.flickr.com/photos/spigoo/6501844/ Java: http://www.flickr.com/photos/london/33968122/ Panama: http://www.flickr.com/photos/a-barth/4466781603/ Canada: http://www.flickr.com/photos/raveneye/2238545040/ Friday, 16 March, 12