Fog Gem - Access Denied on deleting S3 file - ruby-on-rails

Question

I'm using fog gem with carrierwave for uploading files to s3. The upload is ok and works perfectly, but, once I try to delete some instance of my model with the file attached, it sends the delete request and returns Access Denied, as bellow:
[fog][WARNING] fog: followed redirect to bucket-name.s3-us-west-2.amazonaws.com, connecting to the matching region will be more performant
Excon::Error::Forbidden: Expected(204) <=> Actual(403 Forbidden)
excon.error.response
:body => "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>EB625F4C97AD368E</RequestId><HostId>E+We/GvBslMHoNn9nTT6Uw3t0qfJ9jXHCNkJRu0KOk5sk8WoFZbkaIyUB0WcWNPZuH2uCeoZTIo=</HostId></Error>"
:cookies => [
]
:headers => {
"Content-Type" => "application/xml"
"Date" => "Wed, 21 Dec 2016 14:48:53 GMT"
"Server" => "AmazonS3"
"x-amz-id-2" => "E+We/GvBslMHoNn9nTT6Uw3t0qfJ9jXHCNkJRu0KOk5sk8WoFZbkaIyUB0WcWNPZuH2uCeoZTIo="
"x-amz-request-id" => "EB625F4C97AD368E"
}
:host => "bucket-name.s3.amazonaws.com"
:local_address => "192.168.2.106"
:local_port => 51425
:path => "/uploads/conta/pdf_conta/375/1530_09-2016.pdf"
:port => 443
:reason_phrase => "Forbidden"
:remote_ip => "52.216.66.16"
:status => 403
:status_line => "HTTP/1.1 403 Forbidden\r\n"
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/expects.rb:7:in `response_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/response_parser.rb:9:in `response_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/connection.rb:388:in `response'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/connection.rb:252:in `request'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/idempotent.rb:27:in `error_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/base.rb:11:in `error_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/base.rb:11:in `error_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/connection.rb:272:in `rescue in request'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/connection.rb:215:in `request'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/idempotent.rb:27:in `error_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/base.rb:11:in `error_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/base.rb:11:in `error_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/connection.rb:272:in `rescue in request'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/connection.rb:215:in `request'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/idempotent.rb:27:in `error_call'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/excon-0.54.0/lib/excon/middlewares/base.rb:11:in `error_call'
... 36 levels...
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/railties-5.0.0.1/lib/rails/commands/console_helper.rb:9:in `start'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:78:in `console'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:293:in `require'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:293:in `block in require'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:293:in `require'
from /home/ronanlopes/HY Brazil/HyBrazil/bin/rails:9:in `<top (required)>'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `load'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `block in load'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
from /home/ronanlopes/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `load'
from /home/ronanlopes/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /home/ronanlopes/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'
The user token I'm using on my config has the AmazonS3FullAccess - AWS Managed policy, so it doesn't makes sense to me. Any ideas?

Answer 1

From what I see, you are setting the bucket_name variable on fog gem to be 'bucket-name', either that or you have edited it to post here.
Your config/initializer/carrierwave.rb should look something like this
CarrierWave.configure do |config|
config.fog_credentials = {
# Configuration for Amazon S3 should be made available through an Environment variable.
# For local installations, export the env variable through the shell OR
# if using Passenger, set an Apache environment variable.
#
# In Heroku, follow http://devcenter.heroku.com/articles/config-vars
#
# $ heroku config:add S3_KEY=your_s3_access_key S3_SECRET=your_s3_secret S3_REGION=eu-west-1 S3_ASSET_URL=http://assets.example.com/ S3_BUCKET_NAME=s3_bucket/folder
# Configuration for Amazon S3
:provider => 'AWS',
:aws_access_key_id => ENV['S3_KEY'],
:aws_secret_access_key => ENV['S3_SECRET'],
:region => ENV['S3_REGION']
}
# For testing, upload files to local `tmp` folder.
if Rails.env.test? || Rails.env.cucumber?
config.storage = :file
config.enable_processing = false
config.root = "#{Rails.root}/tmp"
else
config.storage = :fog
end
config.cache_dir = "#{Rails.root}/tmp/uploads" # To let CarrierWave work on heroku
config.fog_directory = ENV['S3_BUCKET_NAME']
config.s3_access_policy = :public_read # Generate http:// urls. Defaults to :authenticated_read (https://)
config.fog_host = "#{ENV['S3_ASSET_URL']}/#{ENV['S3_BUCKET_NAME']}"
end
You may be setting ENV['S3_BUCKET_NAME'] or ENV['S3_ASSET_URL'] variables wrong, or even setting it mannually, check those in your .env file