How to create a ssh tunnel in ruby and then connect to mysql server on the remote host

Question

I would like to create a ruby script that I can run mysql commands on a remote server through a ssh tunnel.

Right now I have a manual process to do this:

Answer 1

I've been trying out the gateway code above, one main difference being I have to use ssh keys for passwordless access, but also found the code handing on the Mysql.connect statement. However, when I replaced

mysql = Mysql.connect("127.0.0.1",...)

with

mysql = Mysql.connect("localhost",...)

it worked fine.

My final code looks like this:

require 'rubygems'
require 'mysql'
require 'net/ssh/gateway'

gateway = Net::SSH::Gateway.new('host',
           'user',
           :keys => ['myprivatekey.pem'],
           :verbose => :debug)
port = gateway.open("127.0.0.1",3306,3307)

mysql = Mysql.connect("localhost","dbuser","dbpassword","dbname",3307)
puts "here"
mysql.close

gateway.close(port)
gateway.shutdown!