Class: Chef::Provisioning::AWSDriver::Driver

Inherits:
Driver
  • Object
show all
Includes:
Mixin::ShellOut
Defined in:
lib/chef/provisioning/aws_driver/driver.rb

Overview

Provisions machines using the AWS SDK

Constant Summary collapse

PORT_DEFAULTS = 
{
  :http => 80,
  :https => 443,
}
PROTOCOL_DEFAULTS = 
{
  25 => :tcp,
  80 => :http,
  443 => :https,
  465 => :ssl,
  587 => :tcp,
}
@@chef_default_lock =

For creating things like AWS keypairs exclusively

Mutex.new

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(driver_url, config) ⇒ Driver

Returns a new instance of Driver.



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 45

def initialize(driver_url, config)
  super

  _, profile_name, region = driver_url.split(':')
  profile_name = nil if profile_name && profile_name.empty?
  region = nil if region && region.empty?

  credentials = profile_name ? aws_credentials[profile_name] : aws_credentials.default
  @aws_config = AWS.config(
    access_key_id:     credentials[:aws_access_key_id],
    secret_access_key: credentials[:aws_secret_access_key],
    region: region || credentials[:region],
    logger: Chef::Log.logger
  )
end

Instance Attribute Details

#aws_config ⇒ Object (readonly)

Returns the value of attribute aws_config.



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 35

def aws_config
  @aws_config
end

Class Method Details

.canonicalize_url(driver_url, config) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 61

def self.canonicalize_url(driver_url, config)
  [ driver_url, config ]
end

.from_url(driver_url, config) ⇒ Object

URL scheme: aws:profilename:region TODO: migration path from fog:AWS - parse that URL canonical URL calls realpath on <path>



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 41

def self.from_url(driver_url, config)
  Driver.new(driver_url, config)
end

Instance Method Details

#account_id ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 529

def 
  begin
    # We've got an AWS account root credential or an IAM admin with access rights
    current_user = iam.client.get_user
    arn = current_user[:user][:arn]
  rescue AWS::IAM::Errors::AccessDenied => e
    # If we don't have access, the error message still tells us our account ID and user ...
    # https://forums.aws.amazon.com/thread.jspa?messageID=394344
    if e.to_s !~ /\b(arn:aws:iam::[0-9]{12}:\S*)/
      raise "IAM error response for GetUser did not include user ARN.  Can't retrieve account ID."
    end
    arn = $1
  end
  parse_arn(arn)[:account_id]
end

#allocate_image(action_handler, image_spec, image_options, machine_spec, machine_options) ⇒ Object

Image methods



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 325

def allocate_image(action_handler, image_spec, image_options, machine_spec, machine_options)
  actual_image = image_for(image_spec)
  if actual_image.nil? || !actual_image.exists? || actual_image.state == :failed
    action_handler.perform_action "Create image #{image_spec.name} from machine #{machine_spec.name} with options #{image_options.inspect}" do
      image_options[:name] ||= image_spec.name
      image_options[:instance_id] ||= machine_spec.reference['instance_id']
      image_options[:description] ||= "Image #{image_spec.name} created from machine #{machine_spec.name}"
      Chef::Log.debug "AWS Image options: #{image_options.inspect}"
      image = ec2.images.create(image_options.to_hash)
      image_spec.reference = {
        'driver_url' => driver_url,
        'driver_version' => Chef::Provisioning::AWSDriver::VERSION,
        'image_id' => image.id,
        'allocated_at' => Time.now.to_i
      }
    end
  end
end

#allocate_load_balancer(action_handler, lb_spec, lb_options, machine_specs) ⇒ Object

Load balancer methods



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 66

def allocate_load_balancer(action_handler, lb_spec, lb_options, machine_specs)
  lb_options = AWSResource.lookup_options(lb_options || {}, managed_entry_store: lb_spec.managed_entry_store, driver: self)

  old_elb = nil
  actual_elb = load_balancer_for(lb_spec)
  if !actual_elb || !actual_elb.exists?
    lb_options[:listeners] ||= get_listeners(:http)
    if !lb_options[:subnets] && !lb_options[:availability_zones] && machine_specs
      lb_options[:subnets] = machine_specs.map { |s| ec2.instances[s.reference['instance_id']].subnet }.uniq
    end

    perform_action = proc { |desc, &block| action_handler.perform_action(desc, &block) }
    Chef::Log.debug "AWS Load Balancer options: #{lb_options.inspect}"

    updates = [ "create load balancer #{lb_spec.name} in #{aws_config.region}" ]
    updates << "  enable availability zones #{lb_options[:availability_zones]}" if lb_options[:availability_zones]
    updates << "  attach subnets #{lb_options[:subnets].join(', ')}" if lb_options[:subnets]
    updates << "  with listeners #{lb_options[:listeners]}" if lb_options[:listeners]
    updates << "  with security groups #{lb_options[:security_groups]}" if lb_options[:security_groups]


    action_handler.perform_action updates do
      actual_elb = elb.load_balancers.create(lb_spec.name, lb_options)

      lb_spec.reference = {
        'driver_url' => driver_url,
        'driver_version' => Chef::Provisioning::AWSDriver::VERSION,
        'allocated_at' => Time.now.utc.to_s,
      }
    end
  else
    # Header gets printed the first time we make an update
    perform_action = proc do |desc, &block|
      perform_action = proc { |desc, &block| action_handler.perform_action(desc, &block) }
      action_handler.perform_action [ "Update load balancer #{lb_spec.name} in #{aws_config.region}", desc ].flatten, &block
    end

    # TODO: refactor this whole giant method into many smaller method calls
    # TODO if we update scheme, we don't need to run any of the other updates.
    # Also, if things aren't specified (such as machines / listeners), we
    # need to grab them from the actual load balancer so we don't lose them.
    # i.e. load_balancer 'blah' do
    #   lb_options: { scheme: 'other_scheme' }
    # end
    # TODO we will leak the actual_elb if we fail to finish creating it
    # Update scheme - scheme is immutable once set, so if it is changing we need to delete the old
    # ELB and create a new one
    if lb_options[:scheme] && lb_options[:scheme].downcase != actual_elb.scheme
      desc = ["  updating scheme to #{lb_options[:scheme]}"]
      desc << "  WARN: scheme is immutable, so deleting and re-creating the ELB"
      perform_action.call(desc) do
        old_elb = actual_elb
        actual_elb = elb.load_balancers.create(lb_spec.name, lb_options)
      end
    end

    # Update security groups
    if lb_options[:security_groups]
      current = actual_elb.security_group_ids
      desired = lb_options[:security_groups]
      if current != desired
        perform_action.call("  updating security groups to #{desired.to_a}") do
          elb.client.apply_security_groups_to_load_balancer(
            load_balancer_name: actual_elb.name,
            security_groups: desired.to_a
          )
        end
      end
    end

    if lb_options[:availability_zones] || lb_options[:subnets]
      # A subnet always belongs to an availability zone.  When specifying a ELB spec, you can either
      # specify subnets OR AZs but not both.  You cannot specify multiple subnets in the same AZ.
      # You must specify at least 1 subnet or AZ.  On an update you cannot remove all subnets
      # or AZs - it must belong to one.
      if lb_options[:availability_zones] && lb_options[:subnets]
        # We do this check here because there is no atomic call we can make to specify both
        # subnets and AZs at the same time
        raise "You cannot specify both `availability_zones` and `subnets`"
      end

      # Users can switch from availability zones to subnets or vice versa.  To ensure we do not
      # unassign all (which causes an AWS error) we first add all available ones, then remove
      # an unecessary ones
      actual_zones_subnets = {}
      actual_elb.subnets.each do |subnet|
        actual_zones_subnets[subnet.id] = subnet.availability_zone.name
      end

      # Only 1 of subnet or AZ will be populated b/c of our check earlier
      desired_subnets_zones = {}
      if lb_options[:availability_zones]
        lb_options[:availability_zones].each do |zone|
          # If the user specifies availability zone, we find the default subnet for that
          # AZ because this duplicates the create logic
          zone = zone.downcase
          filters = [
            {:name => 'availabilityZone', :values => [zone]},
            {:name => 'defaultForAz', :values => ['true']}
          ]
          default_subnet = ec2.client.describe_subnets(:filters => filters)[:subnet_set]
          if default_subnet.size != 1
            raise "Could not find default subnet in availability zone #{zone}"
          end
          default_subnet = default_subnet[0]
          desired_subnets_zones[default_subnet[:subnet_id]] = zone
        end
      end
      unless lb_options[:subnets].nil? || lb_options[:subnets].empty?
        subnet_query = ec2.client.describe_subnets(:subnet_ids => lb_options[:subnets])[:subnet_set]
        # AWS raises an error on an unknown subnet, but not an unknown AZ
        subnet_query.each do |subnet|
          zone = subnet[:availability_zone].downcase
          desired_subnets_zones[subnet[:subnet_id]] = zone
        end
      end

      # We only bother attaching subnets, because doing this automatically attaches the AZ
      attach_subnets = desired_subnets_zones.keys - actual_zones_subnets.keys
      unless attach_subnets.empty?
        action = "  attach subnets #{attach_subnets.join(', ')}"
        enable_zones = (desired_subnets_zones.map {|s,z| z if attach_subnets.include?(s)}).compact
        action += " (availability zones #{enable_zones.join(', ')})"
        perform_action.call(action) do
          begin
            elb.client.attach_load_balancer_to_subnets(
              load_balancer_name: actual_elb.name,
              subnets: attach_subnets
            )
          rescue AWS::ELB::Errors::InvalidConfigurationRequest
            raise "You cannot currently move from 1 subnet to another in the same availability zone. " +
                "Amazon does not have an atomic operation which allows this.  You must create a new " +
                "ELB with the correct subnets and move instances into it.  Tried to attach subets " +
                "#{attach_subnets.join(', ')} (availability zones #{enable_zones.join(', ')}) to " +
                "existing ELB named #{actual_elb.name}"
          end
        end
      end

      detach_subnets = actual_zones_subnets.keys - desired_subnets_zones.keys
      unless detach_subnets.empty?
        action = "  detach subnets #{detach_subnets.join(', ')}"
        disable_zones = (actual_zones_subnets.map {|s,z| z if detach_subnets.include?(s)}).compact
        action += " (availability zones #{disable_zones.join(', ')})"
        perform_action.call(action) do
          elb.client.detach_load_balancer_from_subnets(
            load_balancer_name: actual_elb.name,
            subnets: detach_subnets
          )
        end
      end
    end

    # Update listeners - THIS IS NOT ATOMIC
    if lb_options[:listeners]
      add_listeners = {}
      lb_options[:listeners].each { |l| add_listeners[l[:port]] = l }
      actual_elb.listeners.each do |listener|
        desired_listener = add_listeners.delete(listener.port)
        if desired_listener

          # listener.(port|protocol|instance_port|instance_protocol) are immutable for the life
          # of the listener - must create a new one and delete old one
          immutable_updates = []
          if listener.protocol != desired_listener[:protocol].to_sym.downcase
            immutable_updates << "    update protocol from #{listener.protocol.inspect} to #{desired_listener[:protocol].inspect}"
          end
          if listener.instance_port != desired_listener[:instance_port]
            immutable_updates << "    update instance port from #{listener.instance_port.inspect} to #{desired_listener[:instance_port].inspect}"
          end
          if listener.instance_protocol != desired_listener[:instance_protocol].to_sym.downcase
            immutable_updates << "    update instance protocol from #{listener.instance_protocol.inspect} to #{desired_listener[:instance_protocol].inspect}"
          end
          if !immutable_updates.empty?
            perform_action.call(immutable_updates) do
              listener.delete
              actual_elb.listeners.create(desired_listener)
            end
          elsif listener.server_certificate != desired_listener[:server_certificate]
            # Server certificate is mutable - if no immutable changes required a full recreate, update cert
            perform_action.call("    update server certificate from #{listener.server_certificate} to #{desired_listener[:server_certificate]}") do
              listener.server_certificate = desired_listener[:server_certificate]
            end
          end

        else
          perform_action.call("  remove listener #{listener.port}") do
            listener.delete
          end
        end
      end
      add_listeners.values.each do |listener|
        updates = [ "  add listener #{listener[:port]}" ]
        updates << "    set protocol to #{listener[:protocol].inspect}"
        updates << "    set instance port to #{listener[:instance_port].inspect}"
        updates << "    set instance protocol to #{listener[:instance_protocol].inspect}"
        updates << "    set server certificate to #{listener[:server_certificate]}" if listener[:server_certificate]
        perform_action.call(updates) do
          actual_elb.listeners.create(listener)
        end
      end
    end
  end

  # Update instance list, but only if there are machines specified
  if machine_specs
    actual_instance_ids = actual_elb.instances.map { |i| i.instance_id }

    instances_to_add = machine_specs.select { |s| !actual_instance_ids.include?(s.reference['instance_id']) }
    instance_ids_to_remove = actual_instance_ids - machine_specs.map { |s| s.reference['instance_id'] }

    if instances_to_add.size > 0
      perform_action.call("  add machines #{instances_to_add.map { |s| s.name }.join(', ')}") do
        instance_ids_to_add = instances_to_add.map { |s| s.reference['instance_id'] }
        Chef::Log.debug("Adding instances #{instance_ids_to_add.join(', ')} to load balancer #{actual_elb.name} in region #{aws_config.region}")
        actual_elb.instances.add(instance_ids_to_add)
      end
    end

    if instance_ids_to_remove.size > 0
      perform_action.call("  remove instances #{instance_ids_to_remove}") do
        actual_elb.instances.remove(instance_ids_to_remove)
      end
    end
  end

  # We have successfully switched all our instances to the (possibly) new LB
  # so it is safe to delete the old one.
  unless old_elb.nil?
    old_elb.delete
  end
ensure
  # Something went wrong before we could moved instances from the old ELB to the new one
  # Don't delete the old ELB, but warn users there could now be 2 ELBs with the same name
  unless old_elb.nil?
    Chef::Log.warn("It is possible there are now 2 ELB instances - #{old_elb.name} and #{actual_elb.name}. " +
    "Determine which is correct and manually clean up the other.")
  end
end

#allocate_machine(action_handler, machine_spec, machine_options) ⇒ Object

Machine methods



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 400

def allocate_machine(action_handler, machine_spec, machine_options)
  actual_instance = instance_for(machine_spec)
  if actual_instance == nil || !actual_instance.exists? || actual_instance.status == :terminated
    bootstrap_options = bootstrap_options_for(action_handler, machine_spec, machine_options)

    action_handler.perform_action "Create #{machine_spec.name} with AMI #{bootstrap_options[:image_id]} in #{aws_config.region}" do
      Chef::Log.debug "Creating instance with bootstrap options #{bootstrap_options}"

      instance = ec2.instances.create(bootstrap_options.to_hash)

      # Make sure the instance is ready to be tagged
      sleep 5 while instance.status == :pending
      # TODO add other tags identifying user / node url (same as fog)
      instance.tags['Name'] = machine_spec.name
      machine_spec.reference = {
          'driver_url' => driver_url,
          'driver_version' => Chef::Provisioning::AWSDriver::VERSION,
          'allocated_at' => Time.now.utc.to_s,
          'host_node' => action_handler.host_node,
          'image_id' => bootstrap_options[:image_id],
          'instance_id' => instance.id
      }
      machine_spec.reference['key_name'] = bootstrap_options[:key_name] if bootstrap_options[:key_name]
      %w(is_windows ssh_username sudo use_private_ip_for_ssh ssh_gateway).each do |key|
        machine_spec.reference[key] = machine_options[key.to_sym] if machine_options[key.to_sym]
      end
    end
  end
end

#allocate_machines(action_handler, specs_and_options, parallelizer) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 430

def allocate_machines(action_handler, specs_and_options, parallelizer)
  #Chef::Log.warn("#{specs_and_options}")
  create_servers(action_handler, specs_and_options, parallelizer) do |machine_spec, server|
#Chef::Log.warn("#{machine_spec}")
    yield machine_spec
  end
  specs_and_options.keys
end

#auto_scaling ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 510

def auto_scaling
  @auto_scaling ||= AWS::AutoScaling.new(config: aws_config)
end

#aws_credentials ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 629

def aws_credentials
  # Grab the list of possible credentials
  @aws_credentials ||= if driver_options[:aws_credentials]
                         driver_options[:aws_credentials]
                       else
                         credentials = Credentials.new
                         if driver_options[:aws_config_file]
                           credentials.load_ini(driver_options[:aws_config_file])
                         elsif driver_options[:aws_csv_file]
                           credentials.load_csv(driver_options[:aws_csv_file])
                         else
                           credentials.load_default
                         end
                         credentials
                       end
end

#bootstrap_options_for(action_handler, machine_spec, machine_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 562

def bootstrap_options_for(action_handler, machine_spec, machine_options)
  bootstrap_options = (machine_options[:bootstrap_options] || {}).to_h.dup
  image_id = bootstrap_options[:image_id] || machine_options[:image_id] || default_ami_for_region(aws_config.region)
  bootstrap_options[:image_id] = image_id
  if !bootstrap_options[:key_name]
    Chef::Log.debug('No key specified, generating a default one...')
    bootstrap_options[:key_name] = default_aws_keypair(action_handler, machine_spec)
  end

  if machine_options[:is_windows]
    Chef::Log.debug "Setting WinRM userdata..."
    bootstrap_options[:user_data] = user_data
  else
    Chef::Log.debug "Non-windows, not setting userdata"
  end

  bootstrap_options = AWSResource.lookup_options(bootstrap_options, managed_entry_store: machine_spec.managed_entry_store, driver: self)
  Chef::Log.debug "AWS Bootstrap options: #{bootstrap_options.inspect}"
  bootstrap_options
end

#build_arn(partition: 'aws', service: nil, region: aws_config.region, account_id: self.account_id, resource: nil) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 514

def build_arn(partition: 'aws', service: nil, region: aws_config.region, account_id: self., resource: nil)
  "arn:#{partition}:#{service}:#{region}:#{}:#{resource}"
end

#connect_to_machine(name, chef_server = nil) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 460

def connect_to_machine(name, chef_server = nil)
  if name.is_a?(MachineSpec)
    machine_spec = name
  else
    machine_spec = Chef::Provisioning::ChefMachineSpec.get(name, chef_server)
  end

  machine_for(machine_spec, machine_spec.reference)
end

#convergence_strategy_for(machine_spec, machine_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 787

def convergence_strategy_for(machine_spec, machine_options)
  # Tell Ohai that this is an EC2 instance so that it runs the EC2 plugin
  convergence_options = Cheffish::MergedConfig.new(
    machine_options[:convergence_options] || {},
    ohai_hints: { 'ec2' => '' })

  # Defaults
  if !machine_spec.reference
    return Chef::Provisioning::ConvergenceStrategy::NoConverge.new(convergence_options, config)
  end

  if machine_spec.reference['is_windows']
    Chef::Provisioning::ConvergenceStrategy::InstallMsi.new(convergence_options, config)
  elsif machine_options[:cached_installer] == true
    Chef::Provisioning::ConvergenceStrategy::InstallCached.new(convergence_options, config)
  else
    Chef::Provisioning::ConvergenceStrategy::InstallSh.new(convergence_options, config)
  end
end

#create_many_instances(num_servers, bootstrap_options, parallelizer) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 967

def create_many_instances(num_servers, bootstrap_options, parallelizer)
  parallelizer.parallelize(1.upto(num_servers)) do |i|
    clean_bootstrap_options = Marshal.load(Marshal.dump(bootstrap_options))
    instance = ec2.instances.create(clean_bootstrap_options.to_hash)

    yield instance if block_given?
    instance
  end.to_a
end

#create_servers(action_handler, specs_and_options, parallelizer, &block) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 903

def create_servers(action_handler, specs_and_options, parallelizer, &block)
  specs_and_servers = instances_for(specs_and_options.keys)

  by_bootstrap_options = {}
  specs_and_options.each do |machine_spec, machine_options|
    actual_instance = specs_and_servers[machine_spec]
    if actual_instance
      if actual_instance.status == :terminated
        Chef::Log.warn "Machine #{machine_spec.name} (#{actual_instance.id}) is terminated.  Recreating ..."
      else
        yield machine_spec, actual_instance if block_given?
        next
      end
    elsif machine_spec.reference
      Chef::Log.warn "Machine #{machine_spec.name} (#{machine_spec.reference['instance_id']} on #{driver_url}) no longer exists.  Recreating ..."
    end

    bootstrap_options = bootstrap_options_for(action_handler, machine_spec, machine_options)
    by_bootstrap_options[bootstrap_options] ||= []
    by_bootstrap_options[bootstrap_options] << machine_spec
  end

  # Create the servers in parallel
  parallelizer.parallelize(by_bootstrap_options) do |bootstrap_options, machine_specs|
    machine_description = if machine_specs.size == 1
      "machine #{machine_specs.first.name}"
    else
      "machines #{machine_specs.map { |s| s.name }.join(", ")}"
    end
    description = [ "creating #{machine_description} on #{driver_url}" ]
    bootstrap_options.each_pair { |key,value| description << "  #{key}: #{value.inspect}" }
    action_handler.report_progress description
    if action_handler.should_perform_actions
      # Actually create the servers
      create_many_instances(machine_specs.size, bootstrap_options, parallelizer) do |instance|

        # Assign each one to a machine spec
        machine_spec = machine_specs.pop
        machine_options = specs_and_options[machine_spec]
        machine_spec.reference = {
          'driver_url' => driver_url,
          'driver_version' => Chef::Provisioning::AWSDriver::VERSION,
          'allocated_at' => Time.now.utc.to_s,
          'host_node' => action_handler.host_node,
          'image_id' => bootstrap_options[:image_id],
          'instance_id' => instance.id
        }
        instance.tags['Name'] = machine_spec.name
        machine_spec.reference['key_name'] = bootstrap_options[:key_name] if bootstrap_options[:key_name]
        %w(is_windows ssh_username sudo use_private_ip_for_ssh ssh_gateway).each do |key|
          machine_spec.reference[key] = machine_options[key.to_sym] if machine_options[key.to_sym]
        end
        action_handler.performed_action "machine #{machine_spec.name} created as #{instance.id} on #{driver_url}"

        yield machine_spec, instance if block_given?
      end

      if machine_specs.size > 0
        raise "Not all machines were created by create_servers"
      end
    end
  end.to_a
end

#create_ssh_transport(machine_spec, machine_options, instance) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 720

def create_ssh_transport(machine_spec, machine_options, instance)
  ssh_options = ssh_options_for(machine_spec, machine_options, instance)
  username = machine_spec.reference['ssh_username'] || machine_options[:ssh_username] || default_ssh_username
  if machine_options.has_key?(:ssh_username) && machine_options[:ssh_username] != machine_spec.reference['ssh_username']
    Chef::Log.warn("Server #{machine_spec.name} was created with SSH username #{machine_spec.reference['ssh_username']} and machine_options specifies username #{machine_options[:ssh_username]}.  Using #{machine_spec.reference['ssh_username']}.  Please edit the node and change the chef_provisioning.reference.ssh_username attribute if you want to change it.")
  end
  options = {}
  if machine_spec.reference[:sudo] || (!machine_spec.reference.has_key?(:sudo) && username != 'root')
    options[:prefix] = 'sudo '
  end

  remote_host = determine_remote_host(machine_spec, instance)

  #Enable pty by default
  options[:ssh_pty_enable] = true
  options[:ssh_gateway] = machine_spec.reference['ssh_gateway'] if machine_spec.reference.has_key?('ssh_gateway')

  Chef::Provisioning::Transport::SSH.new(remote_host, username, ssh_options, options, config)
end

#create_winrm_transport(machine_spec, machine_options, instance) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 673

def create_winrm_transport(machine_spec, machine_options, instance)
  remote_host = determine_remote_host(machine_spec, instance)

  port = machine_spec.reference['winrm_port'] || 5985
  endpoint = "http://#{remote_host}:#{port}/wsman"
  type = :plaintext
  pem_bytes = get_private_key(instance.key_name)
  encrypted_admin_password = wait_for_admin_password(machine_spec)

  decoded = Base64.decode64(encrypted_admin_password)
  private_key = OpenSSL::PKey::RSA.new(pem_bytes)
  decrypted_password = private_key.private_decrypt decoded

  winrm_options = {
    :user => machine_spec.reference['winrm_username'] || 'Administrator',
    :pass => decrypted_password,
    :disable_sspi => true,
    :basic_auth_only => true
  }

  Chef::Provisioning::Transport::WinRM.new("#{endpoint}", type, winrm_options, {})
end

#default_ami_for_region(region) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 646

def default_ami_for_region(region)
  Chef::Log.debug("Choosing default AMI for region '#{region}'")

  case region
    when 'ap-northeast-1'
      'ami-c786dcc6'
    when 'ap-southeast-1'
      'ami-eefca7bc'
    when 'ap-southeast-2'
      'ami-996706a3'
    when 'eu-west-1'
      'ami-4ab46b3d'
    when 'eu-central-1'
      'ami-7c3c0a61'
    when 'sa-east-1'
      'ami-6770d87a'
    when 'us-east-1'
      'ami-d2ff23ba'
    when 'us-west-1'
      'ami-73717d36'
    when 'us-west-2'
      'ami-f1ce8bc1'
    else
      raise 'Unsupported region!'
  end
end

#default_aws_keypair(action_handler, machine_spec) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 884

def default_aws_keypair(action_handler, machine_spec)
  driver = self
  default_key_name = default_aws_keypair_name(machine_spec)
  updated = @@chef_default_lock.synchronize do
    Provisioning.inline_resource(action_handler) do
      aws_key_pair default_key_name do
        driver driver
        allow_overwrite true
      end
    end
  end

  # Only warn the first time
  default_warning = 'Using default key, which is not shared between machines!  It is recommended to create an AWS key pair with the aws_key_pair resource, and set :bootstrap_options => { :key_name => <key name> }'
  Chef::Log.warn(default_warning) if updated

  default_key_name
end

#default_aws_keypair_name(machine_spec) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 875

def default_aws_keypair_name(machine_spec)
  if machine_spec.reference &&
      Gem::Version.new(machine_spec.reference['driver_version']) < Gem::Version.new('0.10')
    'metal_default'
  else
    'chef_default'
  end
end

#default_instance_type ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 1034

def default_instance_type
  't1.micro'
end

#default_ssh_username ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 583

def default_ssh_username
  'ubuntu'
end

#destroy_image(action_handler, image_spec, image_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 358

def destroy_image(action_handler, image_spec, image_options)
  actual_image = image_for(image_spec)
  if actual_image.nil? || !actual_image.exists?
    Chef::Log.warn "Image #{image_spec.name} doesn't exist"
  else
    snapshots = actual_image.block_device_mappings.map do |dev, opts|
      ec2.snapshots[opts[:snapshot_id]]
    end
    action_handler.perform_action "De-registering image #{image_spec.name}" do
      actual_image.deregister
    end
    if snapshots.any?
      action_handler.perform_action "Deleting image #{image_spec.name} snapshots" do
        snapshots.each do |snap|
          snap.delete
        end
      end
    end
  end
end

#destroy_load_balancer(action_handler, lb_spec, lb_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 309

def destroy_load_balancer(action_handler, lb_spec, lb_options)
  return if lb_spec == nil

  actual_elb = load_balancer_for(lb_spec)
  if actual_elb && actual_elb.exists?
    # Remove ELB from AWS
    action_handler.perform_action "Deleting EC2 ELB #{lb_spec.id}" do
      actual_elb.delete
    end
  end

  # Remove LB spec from databag
  lb_spec.delete(action_handler)
end

#destroy_machine(action_handler, machine_spec, machine_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 470

def destroy_machine(action_handler, machine_spec, machine_options)
  instance = instance_for(machine_spec)
  if instance && instance.exists?
    # TODO do we need to wait_until(action_handler, machine_spec, instance) { instance.status != :shutting_down } ?
    action_handler.perform_action "Terminate #{machine_spec.name} (#{machine_spec.reference['instance_id']}) in #{aws_config.region} ..." do
      instance.terminate
      machine_spec.reference = nil
    end
  else
    Chef::Log.warn "Instance #{machine_spec.reference['instance_id']} doesn't exist for #{machine_spec.name}"
  end

  strategy = convergence_strategy_for(machine_spec, machine_options)
  strategy.cleanup_convergence(action_handler, machine_spec)
end

#determine_remote_host(machine_spec, instance) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 740

def determine_remote_host(machine_spec, instance)
  if machine_spec.reference['use_private_ip_for_ssh']
    instance.private_ip_address
  elsif !instance.public_ip_address
    Chef::Log.warn("Server #{machine_spec.name} has no public ip address.  Using private ip '#{instance.private_ip_address}'.  Set driver option 'use_private_ip_for_ssh' => true if this will always be the case ...")
    instance.private_ip_address
  elsif instance.public_ip_address
    instance.public_ip_address
  else
    raise "Server #{instance.id} has no private or public IP address!"
  end
end

#ec2 ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 486

def ec2
  @ec2 ||= AWS::EC2.new(config: aws_config)
end

#elb ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 490

def elb
  @elb ||= AWS::ELB.new(config: aws_config)
end

#get_listener(listener) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 998

def get_listener(listener)
  result = {}

  case listener
  when Hash
    result.merge!(listener)
  when Array
    result[:port] = listener[0] if listener.size >= 1
    result[:protocol] = listener[1] if listener.size >= 2
  when Symbol,String
    result[:protocol] = listener
  when Integer
    result[:port] = listener
  else
    raise "Invalid listener #{listener}"
  end

  # If either port or protocol are set, set the other
  if result[:port] && !result[:protocol]
    result[:protocol] = PROTOCOL_DEFAULTS[result[:port]]
  elsif result[:protocol] && !result[:port]
    result[:port] = PORT_DEFAULTS[result[:protocol]]
  end
  if result[:instance_port] && !result[:instance_protocol]
    result[:instance_protocol] = PROTOCOL_DEFAULTS[result[:instance_port]]
  elsif result[:instance_protocol] && !result[:instance_port]
    result[:instance_port] = PORT_DEFAULTS[result[:instance_protocol]]
  end

  # If instance_port is still unset, copy port/protocol over
  result[:instance_port] ||= result[:port]
  result[:instance_protocol] ||= result[:protocol]

  result
end

#get_listeners(listeners) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 977

def get_listeners(listeners)
  case listeners
  when Hash
    listeners.map do |from, to|
      from = get_listener(from)
      from.delete(:instance_port)
      from.delete(:instance_protocol)
      to = get_listener(to)
      to.delete(:port)
      to.delete(:protocol)
      to.merge(from)
    end
  when Array
    listeners.map { |listener| get_listener(listener) }
  when nil
    nil
  else
    [ get_listener(listeners) ]
  end
end

#iam ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 494

def iam
  @iam ||= AWS::IAM.new(config: aws_config)
end

#image_for(image_spec) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 617

def image_for(image_spec)
  Chef::Resource::AwsImage.get_aws_object(image_spec.name, driver: self, managed_entry_store: image_spec.managed_entry_store, required: false)
end

#instance_for(machine_spec) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 602

def instance_for(machine_spec)
  if machine_spec.reference
    if machine_spec.reference['driver_url'] != driver_url
      raise "Switching a machine's driver from #{machine_spec.reference['driver_url']} to #{driver_url} is not currently supported!  Use machine :destroy and then re-create the machine on the new driver."
    end
    Chef::Resource::AwsInstance.get_aws_object(machine_spec.reference['instance_id'], driver: self, managed_entry_store: machine_spec.managed_entry_store, required: false)
  end
end

#instances_for(machine_specs) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 611

def instances_for(machine_specs)
  result = {}
  machine_specs.each { |machine_spec| result[machine_spec] = instance_for(machine_spec) }
  result
end

#keypair_for(bootstrap_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 587

def keypair_for(bootstrap_options)
  if bootstrap_options[:key_name]
    keypair_name = bootstrap_options[:key_name]
    actual_key_pair = ec2.key_pairs[keypair_name]
    if !actual_key_pair.exists?
      ec2.key_pairs.create(keypair_name)
    end
    actual_key_pair
  end
end

#load_balancer_for(lb_spec) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 598

def load_balancer_for(lb_spec)
  Chef::Resource::AwsLoadBalancer.get_aws_object(lb_spec.name, driver: self, managed_entry_store: lb_spec.managed_entry_store, required: false)
end

#machine_for(machine_spec, machine_options, instance = nil) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 548

def machine_for(machine_spec, machine_options, instance = nil)
  instance ||= instance_for(machine_spec)

  if !instance
    raise "Instance for node #{machine_spec.name} has not been created!"
  end

  if machine_spec.reference['is_windows']
    Chef::Provisioning::Machine::WindowsMachine.new(machine_spec, transport_for(machine_spec, machine_options, instance), convergence_strategy_for(machine_spec, machine_options))
  else
    Chef::Provisioning::Machine::UnixMachine.new(machine_spec, transport_for(machine_spec, machine_options, instance), convergence_strategy_for(machine_spec, machine_options))
  end
end

#parse_arn(arn) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 518

def parse_arn(arn)
  parts = arn.split(':', 6)
  {
    partition: parts[1],
    service: parts[2],
    region: parts[3],
    account_id: parts[4],
    resource: parts[5]
  }
end

#ready_image(action_handler, image_spec, image_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 344

def ready_image(action_handler, image_spec, image_options)
  actual_image = image_for(image_spec)
  if actual_image.nil? || !actual_image.exists?
    raise 'Cannot ready an image that does not exist'
  else
    if actual_image.state != :available
      action_handler.report_progress 'Waiting for image to be ready ...'
      wait_until_ready_image(action_handler, image_spec, actual_image)
    else
      action_handler.report_progress "Image #{image_spec.name} is ready!"
    end
  end
end

#ready_load_balancer(action_handler, lb_spec, lb_options, machine_spec) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 306

def ready_load_balancer(action_handler, lb_spec, lb_options, machine_spec)
end

#ready_machine(action_handler, machine_spec, machine_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 439

def ready_machine(action_handler, machine_spec, machine_options)
  instance = instance_for(machine_spec)

  if instance.nil?
    raise "Machine #{machine_spec.name} does not have an instance associated with it, or instance does not exist."
  end

  if instance.status != :running
    wait_until_machine(action_handler, machine_spec, instance) { instance.status != :stopping }
    if instance.status == :stopped
      action_handler.perform_action "Start #{machine_spec.name} (#{machine_spec.reference['instance_id']}) in #{aws_config.region} ..." do
        instance.start
      end
    end
    wait_until_ready_machine(action_handler, machine_spec, instance)
  end

  wait_for_transport(action_handler, machine_spec, machine_options)
  machine_for(machine_spec, machine_options, instance)
end

#s3 ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 498

def s3
  @s3 ||= AWS::S3.new(config: aws_config)
end

#sns ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 502

def sns
  @sns ||= AWS::SNS.new(config: aws_config)
end

#sqs ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 506

def sqs
  @sqs ||= AWS::SQS.new(config: aws_config)
end

#ssh_options_for(machine_spec, machine_options, instance) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 753

def ssh_options_for(machine_spec, machine_options, instance)
  result = {
    # TODO create a user known hosts file
    #          :user_known_hosts_file => vagrant_ssh_config['UserKnownHostsFile'],
    #          :paranoid => true,
    :auth_methods => [ 'publickey' ],
    :keys_only => true,
    :host_key_alias => "#{instance.id}.AWS"
  }.merge(machine_options[:ssh_options] || {})
  if instance.respond_to?(:private_key) && instance.private_key
    result[:key_data] = [ instance.private_key ]
  elsif instance.respond_to?(:key_name) && instance.key_name
    key = get_private_key(instance.key_name)
    unless key
      raise "Server has key name '#{instance.key_name}', but the corresponding private key was not found locally.  Check if the key is in Chef::Config.private_key_paths: #{Chef::Config.private_key_paths.join(', ')}"
    end
    result[:key_data] = [ key ]
  elsif machine_spec.reference['key_name']
    key = get_private_key(machine_spec.reference['key_name'])
    unless key
      raise "Server was created with key name '#{machine_spec.reference['key_name']}', but the corresponding private key was not found locally.  Check if the key is in Chef::Config.private_key_paths: #{Chef::Config.private_key_paths.join(', ')}"
    end
    result[:key_data] = [ key ]
  elsif machine_options[:bootstrap_options] && machine_options[:bootstrap_options][:key_path]
    result[:key_data] = [ IO.read(machine_options[:bootstrap_options][:key_path]) ]
  elsif machine_options[:bootstrap_options] && machine_options[:bootstrap_options][:key_name]
    result[:key_data] = [ get_private_key(machine_options[:bootstrap_options][:key_name]) ]
  else
    # TODO make a way to suggest other keys to try ...
    raise "No key found to connect to #{machine_spec.name} (#{machine_spec.reference.inspect})!"
  end
  result
end

#transport_for(machine_spec, machine_options, instance) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 621

def transport_for(machine_spec, machine_options, instance)
  if machine_spec.reference['is_windows']
    create_winrm_transport(machine_spec, machine_options, instance)
  else
    create_ssh_transport(machine_spec, machine_options, instance)
  end
end

#user_data ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 379

def user_data
  # TODO: Make this use HTTPS at some point.
  <<EOD
<powershell>
winrm quickconfig -q
winrm set winrm/config/winrs '@{MaxMemoryPerShellMB="300"}'
winrm set winrm/config '@{MaxTimeoutms="1800000"}'
winrm set winrm/config/service '@{AllowUnencrypted="true"}'
winrm set winrm/config/service/auth '@{Basic="true"}'

netsh advfirewall firewall add rule name="WinRM 5985" protocol=TCP dir=in localport=5985 action=allow
netsh advfirewall firewall add rule name="WinRM 5986" protocol=TCP dir=in localport=5986 action=allow

net stop winrm
sc config winrm start=auto
net start winrm
</powershell>
EOD
end

#wait_for_admin_password(machine_spec) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 696

def wait_for_admin_password(machine_spec)
  time_elapsed = 0
  sleep_time = 10
  max_wait_time = 900 # 15 minutes
  encrypted_admin_password = nil
  instance_id = machine_spec.reference['instance_id']

  Chef::Log.info "waiting for #{machine_spec.name}'s admin password to be available..."
  while time_elapsed < max_wait_time && encrypted_admin_password.nil?
    response = ec2.client.get_password_data({ :instance_id => instance_id })
    encrypted_admin_password = response['password_data'.to_sym]

    if encrypted_admin_password.nil?
      Chef::Log.info "#{time_elapsed}/#{max_wait_time}s elapsed -- sleeping #{sleep_time} for #{machine_spec.name}'s admin password."
      sleep(sleep_time)
      time_elapsed += sleep_time
    end
  end

  Chef::Log.info "#{machine_spec.name}'s admin password is available!"

  encrypted_admin_password
end

#wait_for_transport(action_handler, machine_spec, machine_options) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 855

def wait_for_transport(action_handler, machine_spec, machine_options)
  instance = instance_for(machine_spec)
  time_elapsed = 0
  sleep_time = 10
  max_wait_time = 120
  transport = transport_for(machine_spec, machine_options, instance)
  unless transport.available?
    if action_handler.should_perform_actions
      action_handler.report_progress "waiting for #{machine_spec.name} (#{instance.id} on #{driver_url}) to be connectable (transport up and running) ..."
      while time_elapsed < max_wait_time && !transport.available?
        action_handler.report_progress "been waiting #{time_elapsed}/#{max_wait_time} -- sleeping #{sleep_time} seconds for #{machine_spec.name} (#{instance.id} on #{driver_url}) to be connectable ..."
        sleep(sleep_time)
        time_elapsed += sleep_time
      end

      action_handler.report_progress "#{machine_spec.name} is now connectable"
    end
  end
end

#wait_until_image(action_handler, image_spec, image = nil, &block) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 811

def wait_until_image(action_handler, image_spec, image=nil, &block)
  image ||= image_for(image_spec)
  time_elapsed = 0
  sleep_time = 10
  max_wait_time = 120
  if !yield(image)
    action_handler.report_progress "waiting for #{image_spec.name} (#{image.id} on #{driver_url}) to be ready ..."
    while time_elapsed < max_wait_time && !yield(image)
      action_handler.report_progress "been waiting #{time_elapsed}/#{max_wait_time} -- sleeping #{sleep_time} seconds for #{image_spec.name} (#{image.id} on #{driver_url}) to be ready ..."
      sleep(sleep_time)
      time_elapsed += sleep_time
    end
    unless yield(image)
      raise "Image #{image.id} did not become ready within 120 seconds"
    end
    action_handler.report_progress "Image #{image_spec.name} is now ready"
  end
end

#wait_until_machine(action_handler, machine_spec, instance = nil, &block) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 834

def wait_until_machine(action_handler, machine_spec, instance=nil, &block)
  instance ||= instance_for(machine_spec)
  time_elapsed = 0
  sleep_time = 10
  max_wait_time = 120
  if !yield(instance)
    if action_handler.should_perform_actions
      action_handler.report_progress "waiting for #{machine_spec.name} (#{instance.id} on #{driver_url}) to be ready ..."
      while time_elapsed < max_wait_time && !yield(instance)
        action_handler.report_progress "been waiting #{time_elapsed}/#{max_wait_time} -- sleeping #{sleep_time} seconds for #{machine_spec.name} (#{instance.id} on #{driver_url}) to be ready ..."
        sleep(sleep_time)
        time_elapsed += sleep_time
      end
      unless yield(instance)
        raise "Image #{instance.id} did not become ready within 120 seconds"
      end
      action_handler.report_progress "#{machine_spec.name} is now ready"
    end
  end
end

#wait_until_ready_image(action_handler, image_spec, image = nil) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 807

def wait_until_ready_image(action_handler, image_spec, image=nil)
  wait_until_image(action_handler, image_spec, image) { image.state == :available }
end

#wait_until_ready_machine(action_handler, machine_spec, instance = nil) ⇒ Object 



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# File 'lib/chef/provisioning/aws_driver/driver.rb', line 830

def wait_until_ready_machine(action_handler, machine_spec, instance=nil)
  wait_until_machine(action_handler, machine_spec, instance) { instance.status == :running }
end