From: Lance Sanchez <lance.sanchez@...>
Date: 2007-03-15T11:02:14+09:00
Subject: Re: Ruby, net-ssh, running an application on remote systems.

sorry about that, I was implementing the shell and a responce, mozilla
crashed and google talk sent a blank message. the app i'm running
seems to be using ncurses, will that cause another problem?


On 3/14/07, lance.sanchez@gmail.com <lance.sanchez@gmail.com> wrote:
> ok, I have a server with a dozen systems attached to it. there are
> commands that I need to run on each system one at a time. i can
> connect to each system with the admin script, i can launch basic
> commands i can even launch the script i need to but when that script
> tries to launch the partimage application to backup the windows
> partitions (this is all being done from linux) it doesn't, i don't get
> any good errors it just dies closes the connection an moves onto the
> next system.
>
> ==admin.rb==
> #!/usr/bin/ruby
> require 'net/ssh'
> Username='root'
> Password='{plain_text_password}'
> Hosts = (101..112).collect {|x| "192.168.0.#{x}"}
> def classroom_pc(host, command)
>   Net::SSH.start( host, Username, Password) do |session|
>     session.open_channel do |channel|
>       channel.on_success do
>         puts "Connected to #{host}"
>       end
>       channel.on_close do
>         puts "Connection Closed to #{host}"
>       end
>       #channel.on_data do |ch, data|
>       #  puts "\trecieved #{data}"
>       #  puts "\tfrom #{host}"
>       #end
>
>       channel.send_request "shell", nil, true
>       channel.send_data "#{command}\n"
>       channel.send_data "exit\n"
>     end
>     session.loop
>   end
> end
> if $0 == __FILE__
>         Hosts.length.times do |i|
>                 classroom_pc(Hosts[i], "/mnt/backup/partimage.rb
> save")
>         end
> end
>
>
> ==/mnt/backup/partimage.rb==
> #!/usr/bin/ruby
> Win_drive = "/dev/hda1"
> Location = "/mnt/backup/classroom/"
> File_type = "partimag.gz"
> def help_message
>         puts "Usage:"
>         puts "\tsave to save the image"
>         puts "\tload to restore an image"
>         puts "\thelp prints this message"
> end
> def hostname
>         `hostname`.chomp
> end
> def save_image
>         system("rm #{Location}#{hostname}*")
>         system("partimage -odb -f3 -z1 save #{Win_drive} \
>         #{Location}#{hostname}.#{File_type}")
> end
> def load_image
>         system("partimage -eb -f3 restore #{Win_drive} \
>         #{Location}#{hostname}.#{File_type}.000")
> end
>
> if $0 == __FILE__
>         unless ARGV.length == 1
>                 help_message
>         end
>         if ARGV.length == 1
>                 help_message if ARGV[0].downcase == "help"
>                 save_image if ARGV[0].downcase == "save"
>                 load_image if ARGV[0].downcase == "load"
>         end
> end
>
>