Class: Chef::Knife::ClusterSsh

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

Direct Known Subclasses

ClusterKick

Instance Attribute Summary

Attributes included from Ironfan::KnifeCommon

#broker, #problems

Instance Method Summary (collapse)

Methods included from Ironfan::KnifeCommon

#all_computers, #bootstrapper, #configure_dry_run, #confirm_execution, #confirm_or_exit, #die, #discover_computers, #display, #exit_if_unhealthy!, #gemfile, #get_relevant_slice, #get_slice, #has_problem, #healthy?, included, load_deps, #load_ironfan, #pick_apart, #predicate_str, #progressbar_for_threads, #relevant?, #run, #run_bootstrap, #section, #sub_command, #wait_for_ssh

Instance Method Details

- (Object) _run



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# File 'lib/chef/knife/cluster_ssh.rb', line 125

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

  @longest = 0
  configure_session

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

  session.close
  exit_if_unhealthy!
end

- (Object) configure_session



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# File 'lib/chef/knife/cluster_ssh.rb', line 47

def configure_session
  target = get_slice(@name_args[0]).select(&:running?)

  display(target) if config[:verbose] || config[:display_target]

  config[:attribute]     ||= Chef::Config[:knife][:ssh_address_attribute] || "fqdn"
  config[:ssh_user]      ||= Chef::Config[:knife][:ssh_user]

  target = target.select {|t| not t.bogus? }
  addresses = target.map {|c| c.machine.vpc_id.nil? ? c.machine.public_hostname : c.machine.public_ip_address }.compact

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

  # Need to include both public host and public ip; sometimes these are different
  @hostname_to_ironfan_hostname = target.to_a.inject({}) do |remap, c|
    remap[c.machine.public_hostname]   = c.machine.tags['Name'] || c.name
    remap[c.machine.public_ip_address] = c.machine.tags['Name'] || c.name
    remap
  end

  @longest_ironfan_hostname = @hostname_to_ironfan_hostname.values.group_by(&:size).max.last[0].size

  @action_nodes = Chef::Search::Query.new.search(:node, "node_name:#{@name_args[0]}*")[0]

  session_from_list(addresses)
end

- (Object) cssh



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# File 'lib/chef/knife/cluster_ssh.rb', line 121

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

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 78

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

- (Object) ssh_command(command, subsession = nil)

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 93

def ssh_command(command, subsession=nil)
  subsession ||= session
  command = fixup_sudo(command)
  #
  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])
          has_problem ->{ print_data(ichannel[:host], "'#{command_snippet.gsub(/[\r\n]+/, "; ")}' terminated with error status #{exit_status}", :err) }
        end
      end
    end
  end
  session.loop
end