Class: Murakumo::Util

Inherits:
Object
  • Object
show all
Defined in:
lib/util/murakumo_ec2_tags.rb,
lib/util/murakumo_ec2_client.rb,
lib/util/murakumo_ec2_instances.rb,
lib/util/murakumo_ec2_interfaces.rb,
lib/util/murakumo_self_ip_address.rb,
lib/util/murakumo_ec2_attach_interface.rb,
lib/util/murakumo_ec2_private_ip_addresses.rb

Defined Under Namespace

Classes: EC2Client

Constant Summary collapse

WAIT_LIMIT = 
99
WAIT_INTERVAL = 
0.3

Class Method Summary collapse

Class Method Details

.ec2_attach_interface(access_key, secret_key, if_id, dev_idx = 1, endpoint = nil, instance_id = nil) ⇒ Object 



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# File 'lib/util/murakumo_ec2_attach_interface.rb', line 13

def self.ec2_attach_interface(access_key, secret_key, if_id, dev_idx = 1, endpoint = nil, instance_id = nil)
  dev_idx = 1 unless dev_idx

  unless instance_id
    instance_id = Net::HTTP.get('169.254.169.254', '/latest/meta-data/instance-id')
  end

  check_own_attached(access_key, secret_key, endpoint, if_id, instance_id)

  ec2_detach_interface(access_key, secret_key, if_id, endpoint, :force) rescue nil

  wait_detach(access_key, secret_key, endpoint, if_id)

  ec2cli = Murakumo::Util::EC2Client.new(access_key, secret_key, endpoint)
  source = ec2cli.query('AttachNetworkInterface',
    'NetworkInterfaceId' => if_id, 'InstanceId' => instance_id, 'DeviceIndex' => dev_idx)

  errors = []

  REXML::Document.new(source).each_element('//Errors/Error') do |element|
    code = element.text('Code')
    message = element.text('Message')
    errors << "#{code}:#{message}"
  end

  raise errors.join(', ') unless errors.empty?
end

.ec2_detach_interface(access_key, secret_key, if_id, endpoint = nil, force = false) ⇒ Object 



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# File 'lib/util/murakumo_ec2_attach_interface.rb', line 41

def self.ec2_detach_interface(access_key, secret_key, if_id, endpoint = nil, force = false)
  interfaces = ec2_interfaces(access_key, secret_key, endpoint, if_id)

  if not interfaces or interfaces.empty?
    raise 'interface was not found'
  end

  interface = interfaces.first
  attachment_id = (interface['attachment'] || {})['attachmentId'] || ''

  if attachment_id.empty?
    raise 'attachmentId was not found'
  end

  ec2cli = Murakumo::Util::EC2Client.new(access_key, secret_key, endpoint)

  params = {'AttachmentId' => attachment_id}
  params['Force'] = true if force
  source = ec2cli.query('DetachNetworkInterface', params)

  errors = []

  REXML::Document.new(source).each_element('//Errors/Error') do |element|
    code = element.text('Code')
    message = element.text('Message')
    errors << "#{code}:#{message}"
  end

  raise errors.join(', ') unless errors.empty?
end

.ec2_instances(access_key, secret_key, endpoint = nil) ⇒ Object 



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# File 'lib/util/murakumo_ec2_instances.rb', line 10

def self.ec2_instances(access_key, secret_key, endpoint = nil)
  ec2cli = Murakumo::Util::EC2Client.new(access_key, secret_key, endpoint)
  source = ec2cli.query('DescribeInstances')
  instances = []

  items = REXML::Document.new(source).get_elements('//instancesSet/item')
  walk_item_list(items, instances)

  return instances
end

.ec2_interfaces(access_key, secret_key, endpoint = nil, if_id = nil) ⇒ Object 



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# File 'lib/util/murakumo_ec2_interfaces.rb', line 10

def self.ec2_interfaces(access_key, secret_key, endpoint = nil, if_id = nil)
  dev_idx = 1 unless dev_idx
  params = {}

  if if_id
    params.update('Filter.1.Name' => 'network-interface-id', 'Filter.1.Value' => if_id)
  end

  ec2cli = Murakumo::Util::EC2Client.new(access_key, secret_key, endpoint)

  source = ec2cli.query('DescribeNetworkInterfaces', params)
  interfaces = []

  items = REXML::Document.new(source).get_elements('//networkInterfaceSet/item')
  walk_item_list(items, interfaces)

  return interfaces
end

.ec2_private_ip_addresses(access_key, secret_key, endpoint = nil) ⇒ Object 



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# File 'lib/util/murakumo_ec2_private_ip_addresses.rb', line 10

def self.ec2_private_ip_addresses(access_key, secret_key, endpoint = nil)
  ec2cli = Murakumo::Util::EC2Client.new(access_key, secret_key, endpoint)
  source = ec2cli.query('DescribeInstances')

  parser = REXML::Parsers::PullParser.new(source)
  ip_addrs = []
  instance_id = nil
  status = nil

  while parser.has_next?
    event = parser.pull
    next if event.event_type != :start_element

    case event[0]
    when 'instanceId'
      instance_id = parser.pull[0]
    when 'instanceState'
      until event.event_type == :start_element and event[0] == 'name'
        event = parser.pull
      end

      status = parser.pull[0]
    when 'privateIpAddress'
      ip_addrs << [instance_id, parser.pull[0], status]
    end
  end

  return ip_addrs
end

.ec2_tags(access_key, secret_key, endpoint = nil, instance_id = nil) ⇒ Object 



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# File 'lib/util/murakumo_ec2_tags.rb', line 10

def self.ec2_tags(access_key, secret_key, endpoint = nil, instance_id = nil)
  unless instance_id
    instance_id = Net::HTTP.get('169.254.169.254', '/latest/meta-data/instance-id')
  end

  ec2cli = Murakumo::Util::EC2Client.new(access_key, secret_key, endpoint)
  source = ec2cli.query('DescribeTags', 'Filter.1.Name' => 'resource-id', 'Filter.1.Value' => instance_id)

  tags = {}

  REXML::Document.new(source).each_element('//tagSet/item') do |element|
    key = element.text('key')
    value = element.text('value')
    tags[key] = value
  end

  return tags
end

.self_ip_address ⇒ Object 



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# File 'lib/util/murakumo_self_ip_address.rb', line 5

def self.self_ip_address
  `/sbin/ifconfig eth0 | awk -F'[: ]+' '/^eth0/,/^$/{if(/inet addr/) print $4}'`.strip
end