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Fast Rails + Heroku Configuration

Free addons!

heroku addons:add memcachier
heroku addons:add mandrill:starter
heroku addons:add newrelic
heroku addons:add pgbackups:auto-month
heroku addons:add papertrail
group :production do
gem 'unicorn'
# Enable gzip compression on heroku, but don't compress images.
gem 'heroku-deflater'
# Heroku injects it if it's not in there already
gem 'rails_12factor'
end
gem 'memcachier'
gem 'dalli'
# Fast IO for memcache
gem 'kgio'
# Serve static assets through Rack + Memcache
# https://devcenter.heroku.com/articles/rack-cache-memcached-rails31
gem 'rack-cache'
web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb
# config/environments/production.rb
# ...
# Enable Rails's static asset server for Heroku
config.serve_static_assets = true
# Set static assets cache header. rack-cache will cache those.
config.static_cache_control = "public, max-age=31536000"
config.cache_store = :dalli_store
client = Dalli::Client.new(ENV["MEMCACHIER_SERVERS"],
:value_max_bytes => 10485760,
:expires_in => 86400) # 1 day
# Configure rack-cache for using memcachier
config.action_dispatch.rack_cache = {
:metastore => client,
:entitystore => client
}
# Send emails via mandrill
ActionMailer::Base.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address => 'smtp.mandrillapp.com',
:port => '587',
:authentication => :plain,
:user_name => ENV['MANDRILL_USERNAME'],
:password => ENV['MANDRILL_APIKEY'],
:domain => 'heroku.com',
}
# ...
# config/unicorn.rb
worker_processes 3
timeout 30
preload_app true
before_fork do |server, worker|
# Replace with MongoDB or whatever
if defined?(ActiveRecord::Base)
ActiveRecord::Base.connection.disconnect!
Rails.logger.info('Disconnected from ActiveRecord')
end
# If you are using Redis but not Resque, change this
if defined?(Resque)
Resque.redis.quit
Rails.logger.info('Disconnected from Redis')
end
sleep 1
end
after_fork do |server, worker|
# Replace with MongoDB or whatever
if defined?(ActiveRecord::Base)
ActiveRecord::Base.establish_connection
Rails.logger.info('Connected to ActiveRecord')
end
# If you are using Redis but not Resque, change this
if defined?(Resque)
Resque.redis = ENV['REDIS_URI']
Rails.logger.info('Connected to Redis')
end
end
@antoinelyset

Awesome thanks !

@EtienneDepaulis

Some suggestions:

  • sucker_punch (to avoir using workers for just emails)
  • add a comment on new relic regarding the monitoring feature to keep the app online without using external services
@boriscy

sucker_punch is great but one must be really carefull if you aren't using ruby 2.0.

@mathieugagne

Can't precompile assets: undefined method `day' for 1:Fixnum
expires_in takes the "default TTL in seconds if you do not pass TTL as a parameter to an individual operation, defaults to 0 or forever" [source: http://www.rubydoc.info/github/mperham/dalli/Dalli/Client]
If it's 1 day you want then value should be 86400

client = Dalli::Client.new(ENV["MEMCACHIER_SERVERS"],
                             :value_max_bytes => 10485760,
                             :expires_in => 86400)
@croaky

These settings, minus Memcache, are in Suspenders. I prefer fronting my Heroku apps with Fastly to Memcache for the fastest static asset serving that only hits the Heroku dynos once per cache via origin pull.

@maurogeorge

You can change the Sendgrid by the Mandrill. In the free plan, they have the double of emails.

@pcreux
Owner

@mathieugagne Thanks! I just fixed it!

@pcreux
Owner

@maurogeorge Done!

@pcreux
Owner

@croaky Fastly charges a minimum of $50 a month right?

@chuckbergeron

Could use a gem 'newrelic' line in the Gemfile. I added the addon but missed the gem, and was wondering why Newrelic was "waiting on data" :grin:

@jesuslerma

do u need to have workers?

@chuckbergeron

The command is now heroku addons:create instead of heroku addons:add

Also, heroku addons:add pgbackups:auto-month doesn't exist. The only postgres backup system I see now is heroku addons:create autobus

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