Class: Maestro::Cloud::Base

Inherits:
Object
  • Object
show all
Includes:
Validator
Defined in:
lib/maestro/cloud.rb

Direct Known Subclasses

Aws

Instance Attribute Summary collapse

Attributes included from Validator

#valid, #validation_errors

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Validator

#invalidate, #valid?, #validate

Constructor Details

#initialize(name, cfg_file = nil, &block) ⇒ Base

Creates a new Cloud object.

  • name: the name of the Cloud

  • cfg_file: Pointer to the file containing the Cloud configuration (optional)

  • block: contents of the Cloud

Raises:

  • (StandardError) 


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# File 'lib/maestro/cloud.rb', line 33

def initialize(name, cfg_file=nil, &block)
  super()
  raise StandardError, "Cloud name cannot contain spaces: #{name}" if name.is_a?(String) && !name.index(/\s/).nil?
  @name = name
  @config_file = cfg_file
  @roles = Hash.new
  @nodes = Hash.new
  @configurable_nodes = Hash.new
  @valid = true
  @logger = Log4r::Logger.new(Regexp::quote(@name.to_s))
  outputter = Log4r::StdoutOutputter.new("#{@name.to_s}-stdout")
  outputter.formatter = ConsoleFormatter.new
  @logger.add(outputter)
  init_logs
  instance_eval(&block) if block_given?
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *params) ⇒ Object

:nodoc:



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# File 'lib/maestro/cloud.rb', line 94

def method_missing(name, *params) #:nodoc:
  @valid = false
  @validation_errors << "Unexpected attribute: #{name}"
end

Instance Attribute Details

#config_file ⇒ Object

the config file for this cloud



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# File 'lib/maestro/cloud.rb', line 20

def config_file
  @config_file
end

#configurable_nodes ⇒ Object (readonly)

the Hash of Configurable Nodes in this Cloud



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# File 'lib/maestro/cloud.rb', line 22

def configurable_nodes
  @configurable_nodes
end

#log_directory ⇒ Object (readonly)

String containing the full path to this Cloud’s log directory



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# File 'lib/maestro/cloud.rb', line 24

def log_directory
  @log_directory
end

#log_file ⇒ Object (readonly)

String containing the full path to this Cloud’s log file



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# File 'lib/maestro/cloud.rb', line 26

def log_file
  @log_file
end

#name ⇒ Object (readonly)

the name of this cloud



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# File 'lib/maestro/cloud.rb', line 18

def name
  @name
end

Class Method Details

.create_from_file(config_file) ⇒ Object

Creates a Cloud from the contents of the given file



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# File 'lib/maestro/cloud.rb', line 51

def self.create_from_file(config_file)
  cloud = eval(File.read(config_file))
  cloud.config_file = config_file
  return cloud
end

Instance Method Details

#chef_solo_installed?(session = nil) ⇒ Boolean

Checks if chef-solo is installed on each of the Configurable Nodes in this Cloud. This method returns an Array with two elements:

  • element boolean indicating whether chef-solo is installed on all Configurable Nodes

  • element Array of Nodes which need chef-solo installed

Returns:

  • (Boolean) 


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# File 'lib/maestro/cloud.rb', line 140

def chef_solo_installed?(session=nil)
  close_session = false
  if session.nil?
    session = open_ssh_session
    close_session = true
  end
  @logger.info "Checking for installation of chef-solo..."
  valid = true
  needs_chef = Array.new
  session.open_channel do |channel|
    # Find the node for this channel's host
    the_node = nil
    @configurable_nodes.each_pair {|name, node| the_node = node if channel[:host].eql? node.hostname}
    if the_node.nil?
      @logger.error "Could not find node matching hostname #{channel[:host]}. This should not happen."
    else
      channel.request_pty {|ch, success| abort "could not obtain pty" if !success}
      channel.exec("chef-solo --version") do |ch, success|
        ch.on_data do |ch, data|
          if !data.include?("Chef: 0.9")
            valid = false
            needs_chef << the_node
          end
        end
      end
    end
  end
  session.loop(60)
  session.close if close_session
  return [valid, needs_chef]
end

#configure ⇒ Object

Configures the Nodes in this Cloud



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# File 'lib/maestro/cloud.rb', line 111

def configure
  @logger.info "Configuring #{@name} Cloud"
  if !@configurable_nodes.empty?
    session = open_ssh_session
    result = chef_solo_installed?(session)
    if !result[0]
      names = result[1].collect {|n| n.name}
      @logger.progress "Installing chef-solo on Nodes #{names.inspect}. This may take a few minutes..."
      session.close
      session = open_ssh_session(result[1])
      install_chef_solo(session)
      configure_chef_solo(session)
      session.close
      @logger.progress "\n"
    else
      @logger.info "chef-solo already installed on Nodes #{@configurable_nodes.keys.inspect}"
    end
    @logger.info "Running chef-solo on Nodes #{@configurable_nodes.keys.inspect}. This may take a few minutes..."
    session = open_ssh_session
    run_chef_solo(session)
    session.close
    @logger.info "Configuration of #{@name} Cloud complete"
  end
end

#configure_chef_solo(session = nil) ⇒ Object

configures chef-solo



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# File 'lib/maestro/cloud.rb', line 228

def configure_chef_solo(session=nil)
  close_session = false
  if session.nil?
    session = open_ssh_session
    close_session = true
  end
  # write the chef-solo config file
  chef_solo_config = 
    ["sudo rm /tmp/chef-solo.rb",
     "sudo mkdir -p /tmp/chef-solo",
     "sudo mkdir -p /tmp/chef-solo/cookbooks",
     "sudo mkdir -p /tmp/chef-solo/roles",
     "sudo sh -c 'echo file_cache_path \\\"/tmp/chef-solo\\\" >> /tmp/chef-solo.rb'",
     "sudo sh -c 'echo cookbook_path \\\"/tmp/chef-solo/cookbooks\\\" >> /tmp/chef-solo.rb'",
     "sudo sh -c 'echo role_path \\\"/tmp/chef-solo/roles\\\" >> /tmp/chef-solo.rb'"]
  chef_solo_config.each do |str|
    session.open_channel do |channel|
      channel.request_pty {|ch, success| abort "could not obtain pty" if !success}
      channel.exec(str)
    end
    session.loop(60)
  end
  session.close if close_session
end

#install_chef_solo(session = nil) ⇒ Object

installs chef-solo on the Configurable Nodes the given session is set up with



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# File 'lib/maestro/cloud.rb', line 173

def install_chef_solo(session=nil)
  close_session = false
  if session.nil?
    session = open_ssh_session
    close_session = true
  end
  etc_issue = nil
  session.open_channel do |channel|
    channel.request_pty {|ch, success| abort "could not obtain pty" if !success}
    channel.exec("cat /etc/issue") do |ch, success|
      ch.on_data {|ch, data| etc_issue = data}
    end
  end
  session.loop(60)

  # shut off the stdout outputter and only log to the nodes' log files
  @configurable_nodes.each_pair {|name, node| node.disable_stdout}
  os = Maestro::OperatingSystem.create_from_etc_issue(etc_issue)
  os.chef_install_script.each do |cmd|
    session.open_channel do |channel|
      # Find the node for this channel's host
      the_node = nil
      @configurable_nodes.each_pair {|name, node| the_node = node if channel[:host].eql? node.hostname}
      if the_node.nil?
        @logger.error "Could not find node matching hostname #{channel[:host]}. This should not happen."
      else
        the_node.logger.info "Installing chef-solo"
        channel.request_pty {|ch, success| abort "could not obtain pty" if !success}
        channel.exec(cmd) do |ch, success|
          @logger.progress "."
          ch.on_data do |ch2, data2|
            begin
              the_node.logger.info data2
            rescue StandardError => err
              the_node.logger.error "Unexpected error logging: #{err.to_s}"
            end
          end
          ch.on_extended_data do |ch2, data2|
            begin
              the_node.logger.error data2
            rescue StandardError => err
              the_node.logger.error "Unexpected error logging: #{err.to_s}"
            end
          end
        end
      end
    end
    session.loop(60)
  end
  # turn the stdout outputter back on
  @configurable_nodes.each_pair {|name, node| node.enable_stdout}
  session.close if close_session
end

#nodes(&block) ⇒ Object

creates the Nodes for this Cloud if a block is given, otherwise returns the Nodes in this Cloud



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# File 'lib/maestro/cloud.rb', line 81

def nodes(&block)
  if block_given?
    instance_eval(&block)
  else
    @nodes
  end
end

#nodes=(nodes) ⇒ Object

sets the nodes Hash



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# File 'lib/maestro/cloud.rb', line 90

def nodes=(nodes)
  @nodes = nodes
end

#role(name, &block) ⇒ Object

creates a Role



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# File 'lib/maestro/cloud.rb', line 72

def role(name, &block)
  if @roles.has_key?(name)
    invalidate "Duplicate role definition: #{name}"
  else
    @roles[name] = Role.new(name, self, &block)
  end
end

#roles(&block) ⇒ Object

creates the Roles for this Cloud if a block is given. Otherwise, returns the roles Hash



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# File 'lib/maestro/cloud.rb', line 58

def roles(&block)
  if block_given?
    instance_eval(&block)
  else
    @roles
  end
end

#roles=(roles) ⇒ Object

sets the roles Hash



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# File 'lib/maestro/cloud.rb', line 67

def roles=(roles)
  @roles = roles
end

#run_chef_solo(session = nil) ⇒ Object

runs chef-solo



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# File 'lib/maestro/cloud.rb', line 254

def run_chef_solo(session=nil)
  close_session = false
  if session.nil?
    session = open_ssh_session
    close_session = true
  end
  # shut off the stdout outputter and only log to the nodes' log files
  @configurable_nodes.each_pair {|name, node| node.disable_stdout}
  # clean up existing cookbooks and roles directories if they exist
  cleanup_cmds = 
    ["sudo rm -rf /tmp/chef-solo/cookbooks",
     "sudo rm -rf /tmp/chef-solo/roles",
     "sudo mkdir -p /tmp/chef-solo/cookbooks",
     "sudo mkdir -p /tmp/chef-solo/roles"]
  cleanup_cmds.each do |str|
    session.open_channel do |channel|
      channel.request_pty {|ch, success| abort "could not obtain pty" if !success}
      channel.exec(str)
    end
    session.loop(60)
  end
  # run chef-solo
  chef_solo_commands = 
     ["sudo chef-solo -l debug -c /tmp/chef-solo.rb -r '#{chef_assets_url()}'"]
  chef_solo_commands.each do |cmd|
    session.open_channel do |channel|
      channel.request_pty {|ch, success| abort "could not obtain pty" if !success}
      # Find the node for this channel's host
      the_node = nil
      @configurable_nodes.each_pair {|name, node| the_node = node if channel[:host].eql? node.hostname}
      if the_node.nil?
        @logger.error "Could not find node matching hostname #{channel[:host]}. This should not happen."
      else
        node_cmd = cmd + " -j '#{node_json_url(the_node)}'"
        channel.exec(node_cmd) do |ch, success|
          ch.on_data do |ch2, data2|
            begin
              the_node.logger.info data2
            rescue StandardError => err
              the_node.logger.error "Unexpected error logging: #{err.to_s}"
            end
          end
          ch.on_extended_data do |ch2, data2|
            begin
              the_node.logger.error data2
            rescue StandardError => err
              the_node.logger.error "Unexpected error logging: #{err.to_s}"
            end
          end
        end
      end
    end
    session.loop(60)
  end
  # turn the stdout outputter back on
  @configurable_nodes.each_pair {|name, node| node.enable_stdout}
  session.close if close_session
end

#shutdown ⇒ Object

Shuts down this Cloud. Takes no action if the Cloud is not running



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# File 'lib/maestro/cloud.rb', line 314

def shutdown
  @logger.info "Shutting down #{@name} Cloud"
end

#start ⇒ Object

Starts this Cloud. Takes no action if the Cloud is already running as currently configured



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# File 'lib/maestro/cloud.rb', line 106

def start
  @logger.info "Starting #{@name} Cloud. This may take a few minutes..."
end

#status ⇒ Object

Reports the current status of this Cloud



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# File 'lib/maestro/cloud.rb', line 100

def status
  @logger.info "#{@name} Cloud status:"
  node_statuses
end