141 lines
4.0 KiB
Markdown
141 lines
4.0 KiB
Markdown
# Deploying on Heroku
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## Manual deployment
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This tutorial assumes that you have already managed to clone Consul on your machine and gotten it to work.
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1. First, create a Heroku account if it isn't already done.
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2. Install the [Heroku CLI](https://devcenter.heroku.com/articles/heroku-cli) and sign in using
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```
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heroku login
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```
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3. Go to your consul repository and instantiate the process
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```
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cd consul
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heroku create your-app-name
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```
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You can add the flag `--region eu` if you want to use their European servers instead of the US ones.
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If _your-app-name_ is not already taken, Heroku should now create your app.
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4. Create a database using
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```
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heroku addons:create heroku-postgresql
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```
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You should now have access to an empty Postgres database whose address was automatically saved as an environment variable named _DATABASE\_URL_. Consul will automatically connect to it when deployed.
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5. Add a file name _heroku.yml_ at the root of your project and paste the following in it
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```
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build:
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languages:
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- ruby
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packages:
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- imagemagick
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run:
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web: bundle exec rails server -e ${RAIL_ENV:-production}
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```
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6. Now, generate a secret key and save it to an ENV variable named SECRET\_KEY\_BASE using
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heroku config:set SECRET_KEY_BASE=`ruby -rsecurerandom -e "puts SecureRandom.hex(64)"`
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You need to let the app know where the secret key is stored by adding a link to the ENV variable in _config/secrets.yml_
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```
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production:
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secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
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```
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and commit this file in the repo by commenting out the corresponding line in the _.gitignore_.
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```
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#/config/secrets.yml
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```
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**Remember not to commit the file if you have any sensitive information in it!**
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7. You can now push your app using
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```
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git push heroku master
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```
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8. It won't work straight away because the database doesn't contain the tables needed. To create them, run
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```
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heroku run rake db:migrate
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```
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If you want to add the test data in the database, you can also run
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```
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heroku run rake db:dev_seed
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```
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9. Your app should now be ready to use. You can open it with
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```
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heroku open
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```
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10. **Optional but recommended:** Install rails\_12factor and specify the Ruby version
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As recommended by Heroku, you can add the gem rails\_12factor and specify the version of Ruby you want to use. You can do so by adding
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```
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gem 'rails_12factor'
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ruby '2.3.2'
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```
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in the file _Gemfile\_custom_. Don't forget to run
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```
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bundle install
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```
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to generate _Gemfile.lock_ before commiting and pushing to the server.
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11. **Optional but recommended:** Use Puma as a web server
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Heroku recommends to use Puma instead of the default web server to improve the responsiveness of your app on [a number of levels](http://blog.scoutapp.com/articles/2017/02/10/which-ruby-app-server-is-right-for-you). First, add the gem in your _Gemfile\_custom_ file:
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```
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gem 'puma'
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```
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Then you need to create a new file named _puma.rb_ \(your _config_ folder is a good place to store it\). Here is a standard content for this file:
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```
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workers Integer(ENV['WEB_CONCURRENCY'] || 2)
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threads_count = Integer(ENV['RAILS_MAX_THREADS'] || 5)
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threads threads_count, threads_count
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preload_app!
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rackup DefaultRackup
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port ENV['PORT'] || 3000
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environment ENV['RACK_ENV'] || 'production'
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on_worker_boot do
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# Worker specific setup for Rails 4.1+
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# See: https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server#on-worker-boot
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ActiveRecord::Base.establish_connection
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end
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```
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You can find an explanation for each of these settings in the [Heroku tutorial](https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server).
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The last part is to change the _web_ task to use Puma by changing it to this in your _heroku.yml_ file:
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```
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web: bundle exec puma -C config/puma.rb
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```
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