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 was able to get this to work without a fork using the mysql2 gem

require 'rubygems'
require 'mysql2'
require 'net/ssh/gateway'

gateway = Net::SSH::Gateway.new(
  'remotehost.com',
  'username'
 )
port = gateway.open('127.0.0.1', 3306, 3307)

client = Mysql2::Client.new(
  host: "127.0.0.1",
  username: 'dbuser',
  password: 'dbpass',
  database: 'dbname',
  port: port
)
results = client.query("SELECT * FROM projects")
results.each do |row|
  p row
end
client.close