本番環境。EC2内でwheneverが動かないのを解決したい

発生している問題・エラーメッセージ

rakeが定期実行が行われない。ローカル環境では動きます。「rake以外の機能は本番環境で正常に動きます。

エラーメッセージ

[ec2-user@ip-172-31-41-82 アプリ名]$ rake push_line:push_line_message_morning
rake aborted!
Mysql2::Error::ConnectionError: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
/var/www/アプリ名/lib/tasks/push.rake:4:in `block (2 levels) in <main>'
Tasks: TOP => push_line:push_line_message_morning
(See full trace by running task with --trace)

該当のソースコード

* database.yml
default: &default
  adapter: mysql2
  encoding: utf8
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: root
  password: <%= ENV['DATABASE_PASSWORD'] %>
  socket: /tmp/mysql.sock

production:
  <<: *default
  database: アプリ名_production
  username: root
  password: <%= ENV['DATABASE_PASSWORD'] %>
  socket: /var/lib/mysql/mysql.sock


*schedule.rb
require File.expand_path(File.dirname(__FILE__) + "/environment")

rails_env = ENV['RAILS_ENV'] || :development
set :environment, :production
env :PATH, ENV['PATH']
set :output, "#{Rails.root.to_s}/log/cron.log"

set :job_template, "source $HOME/.zshrc; $(which zsh) -l -c ':job'"

job_type :rake, "export PATH=\"$HOME/.rbenv/bin:$PATH\"; eval \"$(rbenv init -)\"; cd :path && RAILS_ENV=:environment bundle exec rake :task :output"

every 1.hour do 
  rake 'XXXXX'
  rake 'YYYYY'
end