无法使用 ssh 隧道和 activerecord 连接到远程数据库 [英] Cannot connect to remote db using ssh tunnel and activerecord

问题描述

我在使用以下脚本时遇到了一些问题:

I'm having some trouble with the following script:

require 'rubygems'
require 'active_record'
require 'net/ssh/gateway'

gateway = Net::SSH::Gateway.new('myserver.com', 'myuser', :password => "mypass")
puts "true" if gateway.active?
p = gateway.open('127.0.0.1', 3306, 3307)

class MyClass < ActiveRecord::Base
  establish_connection(
    :adapter  => "mysql",
    :host     => "127.0.0.1",
    :username => "db_user",
    :password => "db_pass",
    :database => "mydb_production",
    :port     => 3307
  )
end

puts MyClass.all.size

gateway.shutdown!

当我运行脚本时，它只是挂起，除非我删除 activerecord 查询.我知道我可以使用隧道连接，因为我可以像这样从命令创建一个隧道:

When I run the script it just hangs, unless I remove the activerecord query. I know I can connect using tunneling because I can create a tunnel from the command like like so:

ssh -f [e-mail] -L 3307/127.0.0.1/3306 -N

然后如果我跑:

require 'rubygems'
require 'active_record'

class MyClass < ActiveRecord::Base
  establish_connection(
    :adapter  => "mysql",
    :host     => "127.0.0.1",
    :username => "db_user",
    :password => "db_pass",
    :database => "mydb_production",
    :port     => 3307
  )
end

puts MyClass.all.size

它工作正常.我做错了什么?

It works fine. What am I doing wrong?

谢谢.

推荐答案

通过使用 mysql2 gem，我能够在没有 fork 的情况下使其工作

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

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

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

class Company < ActiveRecord::Base
  establish_connection(
    :adapter  => "mysql2",
    :host     => "127.0.0.1",
    :username => "dbuser",
    :password => "dbpass",
    :database => "dbname",
    :port     => 3307
  )
end
puts Company.all.size

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