Class: Puter::Backend::Ssh

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

Overview

TODO - pass in a logger, so that stdout and stderr can stream out directly?

Instance Method Summary collapse

Constructor Details

#initialize(host, ssh_opts = {}) ⇒ Ssh

Returns a new instance of Ssh.



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# File 'lib/puter/backend/ssh.rb', line 12

def initialize(host, ssh_opts = {})
  @ssh = Net::SSH.start( host, ssh_opts[:user] || 'root', ssh_opts )
  @scp = Net::SCP.new(@ssh)
end

Instance Method Details

#copy(from, to) ⇒ Object 



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# File 'lib/puter/backend/ssh.rb', line 63

def copy(from, to)
  @scp.upload! from, to
end

#run(command, user = 'root', opts = {}, &output) ⇒ Object 



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# File 'lib/puter/backend/ssh.rb', line 17

def run(command, user='root', opts={}, &output)
  actual_cmd = "sudo -u #{user} -s -- sh -c '#{command}'"
  stdout_data = ''
  stderr_data = ''
  exit_status = nil
  exit_signal = nil

  @ssh.open_channel do |channel|
    # TODO - make request_pty user controllable:
    #          without a pty, RHEL default configs fail to allow sudo
    #          with a pty, openssh comingles stdout and stderr onto stdout
    channel.request_pty do |ch, success|
      raise SshError.new "Could not obtain SSH pty " if !success
    end

    channel.exec(actual_cmd) do |ch, success|
      raise SshError.new "Could not execute command [ #{actual_cmd} ]" if !success
      channel.on_data do |ch, data|
        if output
          output.call(:stdout, data) if output
        else
          stdout_data += data
        end
      end

      channel.on_extended_data do |ch, type, data|
        if output
          output.call(:stderr, data) if output
        else
          stderr_data += data
        end
      end

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

      channel.on_request("exit-signal") do |ch, data|
        exit_signal = data.read_long
      end
    end
  end
  @ssh.loop
  { :cmd => actual_cmd, :stdout => stdout_data, :stderr => stderr_data, :exit_status => exit_status, :exit_signal => exit_signal }
end