Class: EC2::InstanceData

Inherits:
Object
  • Object
show all
Defined in:
lib/ec2/amitools/instance-data.rb

Constant Summary collapse

META_DATA_URL = 
"http://169.254.169.254/latest/meta-data/"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(meta_data_url = META_DATA_URL) ⇒ InstanceData

Returns a new instance of InstanceData.



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# File 'lib/ec2/amitools/instance-data.rb', line 20

def initialize(meta_data_url = META_DATA_URL)
  @meta_data_url = meta_data_url
  # see if we can access the meta data. Be unforgiving - if anything goes wrong 
  # just mark instance data as unaccessible.
  begin
    open(@meta_data_url)
    @instance_data_accessible = true
  rescue StandardError => e
    @instance_data_accessible = false
  end
end

Instance Attribute Details

#instance_data_accessible ⇒ Object (readonly)

Returns the value of attribute instance_data_accessible.



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# File 'lib/ec2/amitools/instance-data.rb', line 18

def instance_data_accessible
  @instance_data_accessible
end

Instance Method Details

#ami_id ⇒ Object 



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# File 'lib/ec2/amitools/instance-data.rb', line 40

def ami_id
  read_meta_data('ami-id')
end

#ancestor_ami_ids ⇒ Object 



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# File 'lib/ec2/amitools/instance-data.rb', line 44

def ancestor_ami_ids
  read_meta_data_list('ancestor-ami-ids')
end

#availability_zone ⇒ Object 



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# File 'lib/ec2/amitools/instance-data.rb', line 56

def availability_zone
  read_meta_data('placement/availability-zone')
end

#block_device_mapping ⇒ Object 



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# File 'lib/ec2/amitools/instance-data.rb', line 52

def block_device_mapping
  read_meta_data_hash('block-device-mapping')
end

#kernel_id ⇒ Object 



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# File 'lib/ec2/amitools/instance-data.rb', line 32

def kernel_id
  read_meta_data('kernel-id')
end

#product_codes ⇒ Object 



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# File 'lib/ec2/amitools/instance-data.rb', line 48

def product_codes
  read_meta_data_list('product-codes')
end

#ramdisk_id ⇒ Object 



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# File 'lib/ec2/amitools/instance-data.rb', line 36

def ramdisk_id
  read_meta_data('ramdisk-id')
end