Ruby on Rails 3 Can t connect to local MySQL server through socket tmp mysql sock on OSX

Question

I have a standard Rails3 environment  RVM 1 2 9  Rails 3 0 5  Ruby 1 9 2p180  MySQL2 Gem 0 2 7   mysql-5 5 10-osx10 6-x86 64  Error I get when running rake db migrate to create database is   Can t connect to local MySQL server through socket   tmp mysql sock   2    config database yml has  development    adapter  mysql2   host  localhost   username  root   password  xxxx   database  xxxx   sure it s something simple I m missing

User · Answer

I found that the problem is that I only have a production environment. I do not have a development or test environment.

By adding 'RAILS_ENV=production' to give the command

bundle exec rake redmine:plugins:migrate RAILS_ENV=production

it worked

User · Answer

On my machine mysqld service stopped that s why it was giving me the same problem   1 - Go to terminal and type  sudo service mysqld restart   This will restart the mysqld service and create a new sock file on the required location

User · Answer

If you are running MYSQL through XAMPP or LAMPP on Ubuntu or other Linux  try   socket   opt lampp var mysql mysql sock

User · Answer

Your mysql server may not be running  Below explains how to start the server  This is an excerpt from the README file that comes with the mysql download   After the installation  you can start up MySQL by running the following commands in a terminal window  You must have administrator privileges to perform this task   If you have installed the Startup Item  use this command    shell gt  sudo  Library StartupItems MySQLCOM MySQLCOM start   ENTER YOUR PASSWORD  IF NECESSARY    PRESS CONTROL-D OR ENTER  EXIT  TO EXIT THE SHELL    If you don t use the Startup Item  enter the following command sequence    shell gt  cd  usr local mysql  shell gt  sudo   bin mysqld safe   ENTER YOUR PASSWORD  IF NECESSARY    PRESS CONTROL-Z   shell gt  bg   PRESS CONTROL-D OR ENTER  EXIT  TO EXIT THE SHELL

User · Answer

tmp mysql sock  will be created automatically when you start the MySQL server  So remember to do that before starting the rails server

User · Answer

These are options to fix this problem   Option 1  change you host into 127 0 0 1  staging    adapter  mysql2   host  127 0 0 1   username  root   password  xxxx   database  xxxx   socket  your-location-socket   Option 2  It seems like you have 2 connections into you server MySql  To find your socket file location do this   mysqladmin variables   grep socket   for me gives   mysqladmin  connect to server at  localhost  failed error   Can t connect to local MySQL server through socket   Applications XAMPP xamppfiles var mysql mysql sock   2   Check that mysqld is running and that the socket    Applications XAMPP xamppfiles var mysql mysql sock  exists    or  mysql --help    I get this error because I installed XAMPP in my OS X Version 10 9 5 for PHP application  Choose one of the default socket location here   I choose for default rails apps   socket   tmp mysql sock   For my PHP apps  I install XAMPP so I set my socket here   socket   Applications XAMPP xamppfiles var mysql mysql sock   OTHERS Socket Location in OS X  For MAMPP   socket   Applications MAMP tmp mysql mysql sock   For Package Installer from MySQL   socket   tmp mysql sock   For MySQL Bundled with Mac OS X Server   socket   var mysql mysql sock   For Ubuntu   socket   var run mysqld mysql sock   Option 3  If all those setting doesn t work you can remove your socket location   staging      socket   var run mysqld mysql sock   I hope this help you

User · Answer

With my installation of MAMP on OSX the MySQL socket is located at  Applications MAMP tmp mysql mysql sock  I used locate mysql sock to find my MySQL socket location   So my config database yml looks like   development    adapter  mysql2   host  localhost   username  root   password  xxxx   database  xxxx   socket   Applications MAMP tmp mysql mysql sock

User · Answer

If you are on Mac OSX      The default location for the MySQL Unix socket is different on Mac OS X and Mac OS X Server depending on the installation type you chose   MySQL Unix Socket Locations on Mac OS X by Installation Type   Package Installer from MySQL ------------------ tmp mysql sock      Tarball from MySQL ------------------------------- tmp mysql sock      MySQL Bundled with Mac OS X Server ------- var mysql mysql sock   So just change your database yml in  socket   tmp mysql sock to point to the right place depending on what OS and installation type you are using

User · Answer

The default location for the MySQL socket on Mac OS X is  var mysql mysql sock

User · Answer

Found it   Change host  localhost in config database yml to host  127 0 0 1 to make rails connect over TCP IP instead of local socket   development    adapter  mysql2   host  127 0 0 1   username  root   password  xxxx   database  xxxx

User · Answer

If you are running MYSQL through XAMPP    Open XAMPP mysql configuration file  on OSX     Applications XAMPP etc my cnf Copy the socket path   socket         Applications XAMPP xamppfiles var mysql mysql sock Open rails project s database configuration file  myproject config database yml Add the socket config to the development database config    --    development    adapter  mysql2   encoding  utf8   reconnect  false   database  difiuri falcioni   pool  5   username  root   password    host  localhost   socket   Applications XAMPP xamppfiles var mysql mysql sock    Restart rails server   Enjoy

User · Answer

First  to find your socket file   mysqladmin variables   grep socket   For me  this gives     socket                                               tmp mysql sock                                                                                                            Then  add a line to your config database yml   development    adapter  mysql2   host  localhost   username  root   password  xxxx   database  xxxx   socket   tmp mysql sock

User · Answer

I have had the same problem  but none of the answers quite gave a step by step of what I needed to do  This error happens because your socket file has not been created yet  All you have to do is    Start you mysql server  so your  tmp mysql sock is created  to do that you run  mysql server start Once that is done  go to your app directory end edit the config database yml file and add edit the socket   tmp mysql sock entry Run rake dbmigrate once again and everything should workout fine

User · Answer

You have problem with like this  Can t connect to local MySQL server through socket   var run mysqld mysqld sock   Ans    sudo service mysql start

[mysql] Ruby on Rails 3 Can't connect to local MySQL server through socket '/tmp/mysql.sock' on OSX

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