Class: Veewee::Ssh

Inherits:
Object
  • Object
show all
Defined in:
lib/veewee/ssh.rb

Class Method Summary collapse

Class Method Details

.execute(host, command, options = { :progress => "on"}) ⇒ Object 



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# File 'lib/veewee/ssh.rb', line 93

def self.execute(host,command, options = { :progress => "on"} )
  defaults= { :port => "22", :exitcode => "0", :user => "root"}
  options=defaults.merge(options)
  @pid=""
  @stdin=command
  @stdout=""
  @stderr=""
  @status=-99999

  puts "Executing command: #{command}"

  @key_auth_tried = false
  ssh_options = { :port => options[:port], :password => options[:password], :paranoid => false}
  # ssh_options[:verbose] => :debug
  begin
    Net::SSH.start(host, options[:user], ssh_options) do |ssh|

        # open a new channel and configure a minimal set of callbacks, then run
        # the event loop until the channel finishes (closes)
        channel = ssh.open_channel do |ch|

          #request pty for sudo stuff and so
          ch.request_pty do |ch, success|
              raise "Error requesting pty" unless success
          end


          ch.exec "#{command}" do |ch, success|
            raise "could not execute command" unless success



            # "on_data" is called when the process writes something to stdout
            ch.on_data do |c, data|
              @stdout+=data

                print data

            end

            # "on_extended_data" is called when the process writes something to stderr
            ch.on_extended_data do |c, type, data|
              @stderr+=data

                print data

            end

            #exit code
            #http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/a806b0f5dae4e1e2
            channel.on_request("exit-status") do |ch, data|
              exit_code = data.read_long
              @status=exit_code
              if exit_code > 0
                puts "ERROR: exit code #{exit_code}"
              else
                #puts "Successfully executed"
              end
            end

            channel.on_request("exit-signal") do |ch, data|
              puts "SIGNAL: #{data.read_long}"
            end

            ch.on_close {
              #puts "done!"
            }
            #status=ch.exec "echo $?"
          end
        end
        channel.wait
      end
  rescue Net::SSH::AuthenticationFailed
    ssh_options[:keys] = Array.new([File.join(File.dirname(__FILE__),'./../../validation/vagrant')])
    ssh_options.delete(:password)
    ssh_options[:auth_methods] = ['publickey']
    if @key_auth_tried
       raise
    else
       @key_auth_tried = true
      retry
    end
  rescue Net::SSH::Disconnect, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ECONNABORTED, Errno::ECONNRESET, Errno::ENETUNREACH
    sleep 1
  end
  
  if (@status.to_s != options[:exitcode] )
    if (options[:exitcode]=="*")
      #its a test so we don't need to worry
    else
      raise "Exitcode was not what we expected"
    end

  end

end

.execute_when_tcp_available(ip = "localhost", options = { }, &block) ⇒ Object

we need to try the actual login because vbox gives us a connect after the machine boots



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# File 'lib/veewee/ssh.rb', line 65

def self.execute_when_tcp_available(ip="localhost", options = { } , &block)

  defaults={ :port => 22, :timeout => 2 , :pollrate => 5}

  options=defaults.merge(options)

  begin
    Timeout::timeout(options[:timeout]) do
      connected=false
      while !connected do
        begin
          puts "trying connection"
          s = TCPSocket.new(ip, options[:port])
          s.close
          block.call(ip);
          return true
        rescue Errno::ECONNREFUSED, Errno::EHOSTUNREACH
          sleep options[:pollrate]
        end
      end
    end
  rescue Timeout::Error
    raise 'timeout connecting to port'
  end

  return false
end

.transfer_file(host, filename, destination = '.', options = {}) ⇒ Object 



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# File 'lib/veewee/ssh.rb', line 49

def self.transfer_file(host,filename,destination = '.' , options = {})
  
  Net::SSH.start( host,options[:user],options ) do |ssh|
    puts "Transferring #{filename} to #{destination} "
    ssh.scp.upload!( filename, destination ) do |ch, name, sent, total|
   #   print "\r#{destination}: #{(sent.to_f * 100 / total.to_f).to_i}%"
      print "."

    end
  end 
  puts
end

.when_ssh_login_works(ip = "localhost", options = { }, &block) ⇒ Object 



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# File 'lib/veewee/ssh.rb', line 4

def self.(ip="localhost", options = {  } , &block)

  defaults={ :port => '22', :timeout => 200 , :user => 'vagrant', :password => 'vagrant'}

  options=defaults.merge(options)

  puts
  puts "Waiting for ssh login with user #{options[:user]} to sshd on port => #{options[:port]} to work"

  begin
    Timeout::timeout(options[:timeout]) do
      connected=false
      @key_auth_tried = false
      ssh_options = { :port => options[:port] , :password => options[:password], :paranoid => false, :timeout => options[:timeout]  }
      while !connected do
        begin
          print "."
          Net::SSH.start(ip, options[:user], ssh_options) do |ssh|
            block.call(ip);
            puts ""
            return true
          end
        rescue Net::SSH::AuthenticationFailed
          options[:keys] = File.join(File.dirname(__FILE__),'./../../validation/vagrant')
          options.delete(:password)
          ssh_options = options
          if @key_auth_tried
             raise
          else
             @key_auth_tried = true
            retry
          end
        rescue Net::SSH::Disconnect,Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ECONNABORTED, Errno::ECONNRESET, Errno::ENETUNREACH
          sleep 5
        end
      end
    end
  rescue Timeout::Error
    raise 'ssh timeout'
  end
  puts ""
  return false
end