Example of a CarrierWave S3 configuration

carrierwave_config.rb

# Here's what I have in my CarrierWave configuration file

require 'carrierwave/processing/mime_types'

CarrierWave.configure do |config|
  config.fog_credentials = {
      :provider               => 'AWS',       # required
      :aws_access_key_id      => 'REPLACE WITH AWS KEY',       # required
      :aws_secret_access_key  => 'REPLACE WITH AWS SECRET'       # required
  }
  config.fog_directory  = 'name_of_bucket'                                # required
  config.fog_host       = 'https://name_of_bucket.s3.amazonaws.com'       # optional, defaults to nil - OPTIONAL UNLESS YOU WANT IT TO WORK!
  config.fog_public     = true                                            # optional, defaults to true
  config.fog_attributes = {'Cache-Control'=>'max-age=315576000'}          # optional, defaults to {}
end