Ruby DBI MySQL: how to specify protocol=tcp

Hello! I’m using a ruby script to synchronize a remote (web) MySQL
database with a local database. I had been remotely accessing the
database through a non-standard port, but I would much rather use an
SSH tunnel for security. I can set up the tunnel to point port 3307
on the local machine to 3306 (MySQL) on the remote host. When using
mysql from the command line, I’m able to connect if I specify –
protocol=tcp. Otherwise, MySQL tries to use a socket, and it fails.

Using Ruby DBI::MySQL, I can’t seem to specify --protocol=tcp. I’ve
put this in both /etc/mysql/my.cnf and ~/.my.cnf so that I no longer
have to explicitly state it from the command line. Still, my script
is unable to connect. Here is the connection setup in my code:

mysql = DBI.connect(‘dbi:Mysql:database=dbname;port=3307’, ‘user’,
‘pass’)

Here’s the error:

/usr/lib/ruby/1.8/DBD/Mysql/Mysql.rb:115:in error': Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) (DBI::DatabaseError) from /usr/lib/ruby/1.8/DBD/Mysql/Mysql.rb:171:inconnect’
from /usr/lib/ruby/1.8/dbi.rb:424:in connect' from /usr/lib/ruby/1.8/dbi.rb:215:inconnect’
from slice-inventory-sync.rb:9

(Note: specifying host=localhost does the same and host=remotehost
fails.)

Any ideas on how I can get --protocol=tcp specified in my script?

Thanks!

-Kyle

mysql = DBI.connect(‘dbi:Mysql:database=dbname;port=3307’, ‘user’,
‘pass’)
yeah try specifying the host as either ‘127.0.0.1’ or ‘localhost’ – one
of the two ignores the sock.
You can also take a look at
http://code.google.com/p/ruby-roger-useful-functions/source/browse/trunk/syncer.rb
for some nice references on how to build a solid version of what you’re
building.
:slight_smile:

Roger,

Thanks for the tips! I had tried specifying host=localhost, but I
hadn’t tried host=127.0.0.1. It works! Bizarre…

Thanks for the link, too. It’s definitely more robust than what I
have, but I’m happy with my solution for now. If I build another sync
script some time, I’ll take some good ideas from that program.

-Kyle

Kyle wrote:

Roger,

Thanks for the tips! I had tried specifying host=localhost, but I
hadn’t tried host=127.0.0.1. It works! Bizarre…
yeah it’s a mysql thing. I have no idea why they did that.

The one I was most happy to discover was how to use compression. That
rocked :slight_smile:

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