Deploying Rails

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When you’re deploying multiple times a day, it needs to be reliable and trusted

…remove the human from the process.

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Existing Solutions

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Until you’ve felt the PainSeeC

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Never roll your own solution

Capistrano’s Deploy Model

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• Requires developer ssh access

• Requires reliable connection between developer and servers

• sudo is probably involved in some way

• ssh key forwarding is also probably involved

• Slow deploys hold up developers

• Deploys are conducted by humans

• Doesn’t scale

Something’s wrong when the solution is more complicated than the problem it’s trying to solve

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Deploys at SeeClickFix

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• ssh or network access not required

• dev’s console is not held up deploying

• Scales well• No complicated setup or

configuration. We can all git push• Deploys via the “merge” button• master branch is always

production

App Servers Display Build Info

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/builds/info - Shows current state

/builds/log - Shows deploy log

Chef Builds the App Server

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{ "exceptional_api_key": "", "rails_env": "production", "db": "scf_productio", "port": "3000", "service_roles": { "deploy_notifier": "app1.seeclickfix.com", "integration_syncr": "app1.seeclickfix.com", "migrator": "app1.seeclickfix.com", "cron_runner": "app1.seeclickfix.com", "queue_hosts": "app1.seeclickfix.com" }, "install_location": "/var/www/seeclickfix_prod", "repo": "ssh://git@github.com/SeeClickFix/scf.git", "branch": "master", "unicorn": { "nprocs": "4" }

1. Add a server to chef2. It builds itself3. It pulls from github

and deploys itself

How code gets to Prod

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1. devs merge to develop2. develop deploys to

test.seeclickfix.com3. Travis CI tests develop4. If CI passes, Travis

merges tested sha to master

5. master deploys to seeclickfix.com

CI really deploys to Prod

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• CI’s job queue acts like the deploy queue.

• Deploys can be skipped using the [ci skip] tag.

SeeClickFix is Hiring!

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