从Rails应用程序使用SSH进行远程执行命令

Question

I have a Rails Application from which I will call one Ruby Definition in the controller, like this.

ssh root@host "uptime" >> /tmp/output

When I doing this, only the /tmp/output is created but not the content. When I running the same from simple Ruby script its working fine.

my controller definition

  def chefclient1
    `ssh root@host "uptime" >> /tmp/output`
    @time = Time.now
  end

my view

= link_to('Start uptime', host_chefclient1_path)

Answer 1

You can use net-ssh gem to access remote host via ssh fo a ruby app. Set your environment up to:

HOSTNAME = 'host'
USER = 'root'
PASS = 'password'

Add to your_helper.rb: something like:

def chefclient1
   result = nil
   Net::SSH.start( ENV[ 'HOSTNAME' ], ENV[ 'USER' ], :password => ENV[ 'PASS' ] ) do| ssh |
      result = ssh.exec! 'uptime'
      puts result
   end

   File.open( '/tmp/output', 'w' ) {| f | f.puts result }
end

And use the helper method as you with from a view.