问题
I have been working on this all day long, and I need some help.
I am trying to setup the mysql database for a RoR project I'm working on from github.
When I try to setup the db in the terminal, I get the following error:
Eric-MacBook:~ eric$ cd ~/review_rocket
Eric-MacBook:review_rocket eric$ rake db:setup
Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'
I have looked through 20 questions on SO, and none have been able to help me solve my problem.
The database is up and running, and the database.yml is set up too.
I am currently going a little mad... please... help...before it's too late.
UPDATE: I just looked at my installed gems, and for some reason it's showing mysql2 (see below)
Eric-Reas-MacBook:~ ericrea$ gem list
*** LOCAL GEMS ***
multi_json (1.8.2)
mysql2 (0.3.13)
net-sftp (2.1.2)
That seems a little odd to me...
Update: Here is what my database.yml is looking like:
common: &common
adapter: mysql2
encoding: utf8
reconnect: false
pool: 5
user_name: xxxx
password: xxxx
socket: /var/run/mysqld/mysqld.sock
development:
<<: *common
database: dev_review_rocket
# Warning: The database defined as "money_tracker_test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *common
database: test_review_rocket
production:
<<: *common
database: prod_review_rocket
UPDATE: Now getting weird errors when trying to reinstall mysql with homebrew (see below):
$ brew install mysql
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/mysql-5.6.1
Already downloaded: /Library/Caches/Homebrew/mysql-5.6.13.mountain_lion.bottle.1.tar.gz
==> Pouring mysql-5.6.13.mountain_lion.bottle.1.tar.gz
==> /usr/local/Cellar/mysql/5.6.13/bin/mysql_install_db --verbose --user=ericrea
2013-10-22 18:32:41 56901 [Note] InnoDB: FTS optimize thread exiting.
2013-10-22 18:32:41 56901 [Note] InnoDB: Starting shutdown...
2013-10-22 18:32:42 56901 [Note] InnoDB: Shutdown completed; log sequence number 1626067
2013-10-22 18:32:42 56901 [Note] /usr/local/Cellar/mysql/5.6.13/bin/mysqld: Shutdown complete
Warning: mysql post_install failed. Rerun with `brew postinstall mysql`.
==> Caveats
A "/etc/my.cnf" from another install may interfere with a Homebrew-built
server starting up correctly.
To connect:
mysql -uroot
To have launchd start mysql at login:
ln -sfv /usr/local/opt/mysql/*.plist ~/Library/LaunchAgents
Then to load mysql now:
launchctl load ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
Or, if you don't want/need launchctl, you can just run:
mysql.server start
==> Summary
🍺 /usr/local/Cellar/mysql/5.6.13: 9382 files, 354M
Eric-Reas-MacBook:~ ericrea$ brew postinstall mysql
==> /usr/local/Cellar/mysql/5.6.13/bin/mysql_install_db --verbose --user=ericrea
2013-10-22 18:33:22 57135 [Note] InnoDB: FTS optimize thread exiting.
2013-10-22 18:33:22 57135 [Note] InnoDB: Starting shutdown...
2013-10-22 18:33:23 57135 [Note] InnoDB: Shutdown completed; log sequence number 1626087
2013-10-22 18:33:23 57135 [Note] /usr/local/Cellar/mysql/5.6.13/bin/mysqld: Shutdown complete
READ THIS: https://github.com/mxcl/homebrew/wiki/troubleshooting
These open issues may also help:
https://github.com/mxcl/homebrew/issues/22021
https://github.com/mxcl/homebrew/pull/22480
回答1:
I ended up figuring this one out.
I ran the following command:
$ mysqladmin variables | grep socket
Which returned:
| performance_schema_max_socket_classes | 12 |
| performance_schema_max_socket_instances | 323 |
| socket | /tmp/mysql.sock
Then I checked the socket location in my database.yml file and it was wrong:
It was wrong. After changing it to the right socket location everything worked like a charm. I hope this helps someone in the future.
回答2:
You have to start the mysql server
mysql.server start
and I think you may be looking for
rake db:migrate
回答3:
Try and find your MySQL's my.cnf file. On a typical Ubuntu server it is at: /etc/mysql/my.cnf
Open the file and make sure that the socket variable i.e. socket = /var/run/mysqld/mysqld.sock
corresponds to your socket value in your apps' database.yml
回答4:
To solve this error first find your socket file, run the following commands in terminal
mysqladmin variables | grep socket
For me, this gives:
| socket | /var/run/mysqld/mysqld.sock
Then, add a line to your config/database.yml:
development:
adapter: mysql2
host: localhost
username: root
password: xxxx
database: xxxx
socket: /var/run/mysqld/mysqld.sock
This will solve this problem.
回答5:
Just simply run
mysql server.restart
to restart the server. This fixed this issue for me.
回答6:
I had similar issue (also using Brew and also getting PID file problem) with mysql and my PHP app. It started after I updated the OSX to Mavericks, probably the system update overrided my settings. Strangely, everything regarding mysql started to work again after I recreated /etc/php.ini and set proper socket address pointing to /tmp/mysql.sock. Maybe it'll help someone googling for this.
来源：https://stackoverflow.com/questions/19530089/getting-cant-connect-to-local-mysql-server-through-socket-var-run-mysqld-mys