module Facter::Util::EC2

Provide a set of utility static methods that help with resolving the EC2 fact.

Public Class Methods

can_connect?(wait_sec=2) click to toggle source

Test if we can connect to the EC2 api. Return true if able to connect. On failure this function fails silently and returns false.

The wait_sec parameter provides you with an adjustable timeout.

# File lib/facter/util/ec2.rb, line 13
def can_connect?(wait_sec=2)
  url = "http://169.254.169.254:80/"
  Timeout::timeout(wait_sec) {open(url)}
  return true
  rescue Timeout::Error
    return false
  rescue
    return false
end
has_ec2_arp?() click to toggle source

Test if the host has an arp entry in its cache that matches the EC2 arp, which is normally +fe:ff:ff:ff:ff:ff+.

# File lib/facter/util/ec2.rb, line 37
def has_ec2_arp?
  mac_address = "fe:ff:ff:ff:ff:ff"
  if Facter.value(:kernel) == 'windows'
    arp_command = "arp -a"
    mac_address.gsub!(":","-")
  else
    arp_command = "arp -an"
  end

  arp_table = Facter::Util::Resolution.exec(arp_command)
  if not arp_table.nil?
    arp_table.each_line do |line|
      return true if line.downcase.include?(mac_address)
    end
  end
  return false
end
has_euca_mac?() click to toggle source

Test if this host has a mac address used by Eucalyptus clouds, which normally is +d0:0d+.

# File lib/facter/util/ec2.rb, line 25
def has_euca_mac?
  !!(Facter.value(:macaddress) =~ %r{^[dD]0:0[dD]:})
end
has_openstack_mac?() click to toggle source

Test if this host has a mac address used by OpenStack, which normally starts with 02:16:3E

# File lib/facter/util/ec2.rb, line 31
def has_openstack_mac?
  !!(Facter.value(:macaddress) =~ %r{^02:16:3[eE]})
end