Complete zero downtime deploys for Rails applications on Heroku
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andrewgr Force-push when deploying to Heroku
This should fix a deploy error (non-fast-forward) when the deploy branch had its history rewritten.
Latest commit 2f559db May 5, 2016


It's better than git push



I haven't written the introduction and proper usage stuff yet, sorry. I was roped into doing a presentation at Rails Meetup at the last minute, and I open sourced this thing quickly. So if you want to know more, poke @keithpitt on Twitter and Github!

Installation and Usage

You need the heroku-cli installed before you can use this plugin.

heroku plugins:install git://
heroku deploy

Because we don't do asset compliation on Heroku anymore, we can easily remove the asset group from being bundled, giving us a nice speed boost.

heroku config:add BUNDLE_WITHOUT="development:test:assets"


By default any safe migrations will run without any downtime. So adding a new column/table/index. If a migration file contains an unsafe keyword remove_column, execute as examples, a maintenance page will be used for a downtime deploy. If you would like to prevent this behavior, then you can add a # safe comment on the destructive line. This allows a zero downtime deploy even with destructive operations.


git clone

mkdir -p ~/.heroku/plugins
cd ~/.heroku/plugins
ln -s ~/path/to/heroku-deploy heroku-deploy

This should allow you to test the plugin and use it locally.


The tests can be run with rspec spec


We encourage all community contributions. Keeping this in mind, please follow these general guidelines when contributing:

  • Fork the project
  • Create a topic branch for what you’re working on (git checkout -b awesome_feature)
  • Commit away, push that up (git push your_remote awesome_feature)
  • Create a new GitHub Issue with the commit, asking for review. Alternatively, send a pull request with details of what you added.


heroku-deploy is released under the MIT License (see the license file) and is copyright Envato & Keith Pitt, 2013.