Class: OpsWorks::Commands::DSH

Inherits:
Object
  • Object
show all
Defined in:
lib/opsworks/commands/dsh.rb

Class Method Summary collapse

Class Method Details



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# File 'lib/opsworks/commands/dsh.rb', line 11

def self.banner
  "Generate and update DSH configuration files"
end

.run ⇒ Object 



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# File 'lib/opsworks/commands/dsh.rb', line 15

def self.run
  options = Trollop::options do
    banner <<-EOS.unindent
      #{DSH.banner}

      Options:
    EOS
    opt :update, "Update ~/.dsh config files directly"
    opt :backup, "Backup old DSH config before updating"
  end

  config = OpsWorks.config

  client = AWS::OpsWorks::Client.new

  instances = []
  layers_by_stack = {}
  instances_by_layer = {}

  config.stacks.each do |stack_id|
    result = client.describe_stacks(stack_ids: [stack_id])
    stack_name = result.stacks.first.name

    result = client.describe_instances(stack_id: stack_id)
    instances += result.instances.select { |i| i[:status] != "stopped" }

    layers_by_stack[stack_name] = []
    result = client.describe_layers(stack_id: stack_id)
    layers_by_stack[stack_name] += result.layers


    instances_by_layer[stack_name] = {}

    layers_by_stack[stack_name].each do |layer|
      layer_inst = []
      result = client.describe_instances(layer_id: layer[:layer_id])
      layer_inst = result.instances.select { |i| i[:status] != "stopped" }

      layer_inst.map! do |instance|
        instance[:hostname]
      end

      instances_by_layer[stack_name][layer[:shortname]] =
                     "\n\n#{DSH_PREFIX}\n" <<
                     "#{layer_inst.join("\n")}\n" <<
                     "#{DSH_POSTFIX}\n\n"

#          puts layer[:shortname]
#          puts instances_by_layer[stack_name][layer[:shortname]]
    end
    layers_by_stack[stack_name].map! do |layer|
      layer[:shortname]
    end
  end

  instances.reject! { |i| i[:elastic_ip].nil? && i[:public_ip].nil? }
  instances.map! do |instance|
    instance[:hostname]
  end

  new_machine_contents = "\n\n#{DSH_PREFIX}\n" <<
                 "#{instances.join("\n")}\n" <<
                 "#{DSH_POSTFIX}\n\n"

  if options[:update]
    dsh_config_dir = "#{ENV['HOME']}/.dsh"

    machines_list = "#{dsh_config_dir}/machines.list"
    groups_dir = "#{dsh_config_dir}/group"

    [dsh_config_dir, groups_dir].each do |dir|
      unless Dir.exists? dir
        Dir.mkdir dir
      end
    end

    if options[:backup]
      OpsWorks::Commands::FileUtil.backup(dsh_config_dir)
    end

    OpsWorks::Commands::FileUtil.update_file(machines_list, new_machine_contents)
    puts "Successfully updated #{machines_list} with " <<
         "#{instances.length} instances!"

    layers_by_stack.keys.each do |stack|
      puts stack
      layers_by_stack[stack].each do |layer|
        puts layer
        contents = instances_by_layer[stack][layer]
        group_file = "#{groups_dir}/#{stack}_#{layer}"
        puts group_file
        OpsWorks::Commands::FileUtil.update_file(group_file, contents)
        puts "Successfully updated group/#{group_file}!"
      end
    end

    puts "Successfully updated #{machines_list} with " <<
         "#{instances.length} instances!"
  else
    puts new_machine_contents.strip
  end
end