Class: Akashi::Vpc::Subnet::Base

Inherits:
Base show all
Defined in:
lib/akashi/vpc/subnet/base.rb

Direct Known Subclasses

Elb, Gateway, Rds, Web

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Ec2::Base

#name, #name=, service_class

Methods inherited from Base

base_class, collection, find, find_by, #initialize, where

Constructor Details

This class inherits a constructor from Akashi::Base

Class Method Details

.all ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 24

def all
  super.select { |subnet| base_cidr_block.include?(subnet.cidr_block) }
end

.cidr ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 79

def cidr
  @cidr ||= 24
end

.create(vpc:, availability_zone:) ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 28

def create(vpc:, availability_zone:)
  response = Akashi::Aws.ec2.client.create_subnet(
    vpc_id:            vpc.id,
    availability_zone: availability_zone,
    cidr_block:        next_cidr_block(vpc: vpc).to_s + "/#{cidr}",
  )

  new(response[:subnet][:subnet_id]).tap do |instance|
    instance.name = name(vpc: vpc)
    puts "Created a Subnet (\#{instance.id}) whose role is \"\#{role}\". Availability zone is \"\#{instance.availability_zone_name}\".\n    EOS\n  end\nend\n"

.current_number(vpc:) ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 43

def current_number(vpc:)
  "%02d" % where(vpc_id: vpc.id).count
end

.latest_cidr_block(vpc:) ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 56

def latest_cidr_block(vpc:)
  where(vpc_id: vpc.id).map(&:cidr_block).max
end

.name(vpc:) ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 83

def name(vpc:)
  "#{Akashi.name}-#{role}-#{current_number(vpc: vpc)}"
end

.netmask ⇒ Object

netmask_binary #=> “11111111111111111111111100000000” netmask #=> IPAddr.new(4294967040, Socket::AF_INET) netmask.to_s #=> “255.255.255.0”



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# File 'lib/akashi/vpc/subnet/base.rb', line 69

def netmask
  @netmask ||= IPAddr.new("0b#{netmask_binary}".oct, Socket::AF_INET)
end

.netmask_binary ⇒ Object

cidr #=> 24 netmask_binary #=> “11111111111111111111111100000000”



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# File 'lib/akashi/vpc/subnet/base.rb', line 75

def netmask_binary
  @netmask_binary ||= ("1" * cidr).ljust(32, "0")
end

.next_cidr_block(vpc:) ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 47

def next_cidr_block(vpc:)
  _latest_cidr_block = latest_cidr_block(vpc: vpc)

  IPAddr.new(
    _latest_cidr_block ? _latest_cidr_block.to_i + step : base_cidr_block.to_s,
    Socket::AF_INET,
  )
end

.object_class ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 91

def object_class
  @object_class ||= "Subnet"
end

.role ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 87

def role
  self.to_s.demodulize.underscore.dasherize
end

.step ⇒ Object

netmask #=> IPAddr.new(4294967040, Socket::AF_INET) step #=> 256



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# File 'lib/akashi/vpc/subnet/base.rb', line 62

def step
  @step ||= (~netmask).succ.to_i
end

Instance Method Details

#cidr_block ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 10

def cidr_block
  IPAddr.new(@object.cidr_block)
end

#number ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 14

def number
  name.slice(/(?<=-)\d{2}\Z/)
end

#route_table=(route_table) ⇒ Object 



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# File 'lib/akashi/vpc/subnet/base.rb', line 18

def route_table=(route_table)
  @object.route_table = route_table.id
  puts "A Subnet (#{id}) associated with a RouteTable (#{route_table.id})."
end