Class: Tagenv::Ec2::Metadata

Inherits:
Object
  • Object
show all
Defined in:
lib/tagenv/ec2/metadata.rb

Constant Summary collapse

TIME_OUT = 
3

Class Method Summary collapse

Class Method Details

.ec2? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tagenv/ec2/metadata.rb', line 11

def self.ec2?
  begin
    ::Timeout.timeout(TIME_OUT) {
      open('http://169.254.169.254/latest/meta-data/instance-id').read
      return true
    }
  rescue => e
    return false
  end
end

.get_document ⇒ Object 



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# File 'lib/tagenv/ec2/metadata.rb', line 35

def self.get_document
  JSON.parse(get_metadata('/latest/dynamic/instance-identity/document/'))
end

.get_instance_id ⇒ Object 



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# File 'lib/tagenv/ec2/metadata.rb', line 39

def self.get_instance_id
  get_metadata('/latest/meta-data/instance-id')
end

.get_metadata(path) ⇒ Object 



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# File 'lib/tagenv/ec2/metadata.rb', line 22

def self.get_metadata(path)
  begin
    result = {}
    ::Timeout.timeout(TIME_OUT) {
      body = open('http://169.254.169.254' + path).read
      return body
    }
    return result
  rescue ::Timeout::Error => e
    raise "not EC2 instance"
  end
end