Class: Fog::SSH::Real

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

Instance Method Summary collapse

Constructor Details

#initialize(address, username, options) ⇒ Real

Returns a new instance of Real.



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# File 'lib/fog/core/ssh.rb', line 40

def initialize(address, username, options)
  require 'net/ssh'

  key_manager = Net::SSH::Authentication::KeyManager.new(nil, options)

  unless options[:key_data] || options[:keys] || options[:password] || key_manager.agent
    raise ArgumentError.new(':key_data, :keys, :password or a loaded ssh-agent is required to initialize SSH')
  end

  if options[:key_data] || options[:keys]
    options[:keys_only] = true
    #Explicitly set these so net-ssh doesn't add the default keys
    #as seen at https://github.com/net-ssh/net-ssh/blob/master/lib/net/ssh/authentication/session.rb#L131-146
    options[:keys] = [] unless options[:keys]
    options[:key_data] = [] unless options[:key_data]
  end

  @address  = address
  @username = username
  @options  = { :paranoid => false }.merge(options)
end

Instance Method Details

#run(commands, &blk) ⇒ Object 



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# File 'lib/fog/core/ssh.rb', line 62

def run(commands, &blk)
  commands = [*commands]
  results  = []
  begin
    Net::SSH.start(@address, @username, @options) do |ssh|
      commands.each do |command|
        result = Result.new(command)
        ssh.open_channel do |ssh_channel|
          ssh_channel.request_pty
          ssh_channel.exec(command) do |channel, success|
            unless success
              raise "Could not execute command: #{command.inspect}"
            end

            channel.on_data do |ch, data|
              result.stdout << data
              yield [data, ''] if blk
            end

            channel.on_extended_data do |ch, type, data|
              next unless type == 1
              result.stderr << data
              yield ['', data] if blk
            end

            channel.on_request('exit-status') do |ch, data|
              result.status = data.read_long
            end

            channel.on_request('exit-signal') do |ch, data|
              result.status = 255
            end
          end
        end
        ssh.loop
        results << result
      end
    end
  rescue Net::SSH::HostKeyMismatch => exception
    exception.remember_host!
    sleep 0.2
    retry
  end
  results
end