Class: Chef::Knife::ClusterSsh

Inherits:
Ssh
  • Object
show all
Includes:
ClusterChef::KnifeCommon
Defined in:
lib/chef/knife/cluster_ssh.rb

Direct Known Subclasses

ClusterKick

Instance Method Summary collapse

Methods included from ClusterChef::KnifeCommon

#bootstrapper, #configure_dry_run, #confirm_execution, #confirm_or_exit, #die, #display, #get_relevant_slice, #get_slice, included, #load_cluster_chef, load_deps, #predicate_str, #progressbar_for_threads, #relevant?, #run_bootstrap, #section, #sub_command

Instance Method Details

#configure_session ⇒ Object 



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# File 'lib/chef/knife/cluster_ssh.rb', line 43

def configure_session
  predicate = @name_args[0].split(/[\s\-]+/,3).map(&:strip)

  target = get_slice(*predicate).select(&:sshable?)

  display(target) if config[:verbose]

  config[:attribute]     ||= Chef::Config[:knife][:ssh_address_attribute] || "fqdn"
  config[:ssh_user]      ||= Chef::Config[:knife][:ssh_user]
  config[:identity_file] ||= target.ssh_identity_file

  @action_nodes = target.chef_nodes
  addresses = target.servers.map do |svr|
    if (svr.cloud.public_ip)             then address = svr.cloud.public_ip ; end
    if (not address) && (svr.fog_server) then address = svr.fog_server.public_ip_address ; end
    if (not address) && (svr.chef_node)  then address = format_for_display( svr.chef_node )[config[:attribute]] ; end
    address
  end.compact

  (ui.fatal("No nodes returned from search!"); exit 10) if addresses.nil? || addresses.length == 0

  session_from_list(addresses)
end

#cssh ⇒ Object 



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# File 'lib/chef/knife/cluster_ssh.rb', line 114

def cssh
  exec "cssh "+session.servers_for.map{|server| server.user ? "#{server.user}@#{server.host}" : server.host}.join(" ")
end

#print_data(host, data, err = nil) ⇒ Object

Override the one in Chef::Knife::Ssh to allow an err flag (prints in red if non-null)



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# File 'lib/chef/knife/cluster_ssh.rb', line 71

def print_data(host, data, err=nil)
  if data =~ /\n/
    data.split(/\n/).each { |d| print_data(host, d, err) }
  else
    padding = @longest - host.length
    str = ui.color(host, :cyan) + (" " * (padding + 1)) + (err ? ui.color(data, :red) : data)
    ui.msg(str)
  end
end

#run ⇒ Object 



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# File 'lib/chef/knife/cluster_ssh.rb', line 118

def run
  load_cluster_chef
  die(banner) if @name_args.empty?
  extend Chef::Mixin::Command

  @longest = 0
  configure_session

  case @name_args[1]
  when "interactive"  then interactive
  when "screen"       then screen
  when "tmux"         then tmux
  when "macterm"      then macterm
  when "cssh"         then cssh
  else
    ssh_command(@name_args[1..-1].join(" "))
  end

  session.close
end

#ssh_command(command, subsession = nil) ⇒ Object

Override the one in Chef::Knife::Ssh to give a big red warning if the process executes with badness



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# File 'lib/chef/knife/cluster_ssh.rb', line 85

def ssh_command(command, subsession=nil)
  subsession ||= session
  command = fixup_sudo(command)
  notifications = []
  subsession.open_channel do |ch|
    ch.request_pty
    ch.exec command do |ch, success|
      raise ArgumentError, "Cannot execute #{command}" unless success
      # note: you can't do the stderr calback because requesting a pty
      # squashes stderr and stdout together
      ch.on_data do |ichannel, data|
        print_data(ichannel[:host], data)
        if data =~ /^knife sudo password: /
          ichannel.send_data("#{get_password}\n")
        end
      end
      ch.on_request "exit-status" do |ichannel, data|
        exit_status = data.read_long
        if exit_status != 0
          command_snippet = (command.length < 70) ? command : (command[0..45] + ' ... ' + command[-19..-1])
          notifications << [ichannel[:host], "'#{command_snippet.gsub(/[\r\n]+/, "; ")}' terminated with error status #{exit_status}", :err]
        end
      end
    end
  end
  session.loop
  notifications.each{|args| print_data(*args) }
end