Class: Terrafying::Components::Subnet

Inherits:
Terrafying::Context
  • Object
show all
Defined in:
lib/terrafying/components/subnet.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Subnet

Returns a new instance of Subnet.



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# File 'lib/terrafying/components/subnet.rb', line 22

def initialize
  super
end

Instance Attribute Details

#az ⇒ Object (readonly)

Returns the value of attribute az.



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# File 'lib/terrafying/components/subnet.rb', line 12

def az
  @az
end

#cidr ⇒ Object (readonly)

Returns the value of attribute cidr.



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# File 'lib/terrafying/components/subnet.rb', line 12

def cidr
  @cidr
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/terrafying/components/subnet.rb', line 12

def id
  @id
end

#public ⇒ Object (readonly)

Returns the value of attribute public.



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# File 'lib/terrafying/components/subnet.rb', line 12

def public
  @public
end

#route_table ⇒ Object (readonly)

Returns the value of attribute route_table.



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# File 'lib/terrafying/components/subnet.rb', line 12

def route_table
  @route_table
end

Class Method Details

.create_in(vpc, name, az, cidr, options = {}) ⇒ Object 



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# File 'lib/terrafying/components/subnet.rb', line 14

def self.create_in(vpc, name, az, cidr, options = {})
  Subnet.new.create_in vpc, name, az, cidr, options
end

.find(id) ⇒ Object 



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# File 'lib/terrafying/components/subnet.rb', line 18

def self.find(id)
  Subnet.new.find(id)
end

Instance Method Details

#create_in(vpc, name, az, cidr, options = {}) ⇒ Object 



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# File 'lib/terrafying/components/subnet.rb', line 46

def create_in(vpc, name, az, cidr, options = {})
  options = {
    tags: {}
  }.merge(options)

  ident = "#{tf_safe(vpc.name)}-#{name}-#{az}"

  @cidr = cidr
  @az = az
  @id = resource :aws_subnet, ident,
                 vpc_id: vpc.id,
                 cidr_block: cidr,
                 availability_zone: az,
                 tags: { Name: ident }.merge(options[:tags])

  @route_table = resource :aws_route_table, ident,
                          vpc_id: vpc.id,
                          tags: { Name: ident }.merge(options[:tags])

  if options[:nat_gateway]
    gateway = { nat_gateway_id: options[:nat_gateway] }
    @public = false
  elsif options[:gateway]
    gateway = { gateway_id: options[:gateway] }
    @public = true
  else
    gateway = nil
    @public = false
  end

  if gateway
    resource :aws_route, "#{ident}-default", {
      route_table_id: @route_table,
      destination_cidr_block: '0.0.0.0/0'
    }.merge(gateway)
  end

  resource :aws_route_table_association, ident,
           subnet_id: @id,
           route_table_id: @route_table

  self
end

#find(id) ⇒ Object 



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# File 'lib/terrafying/components/subnet.rb', line 26

def find(id)
  subnet = aws.subnet_by_id(id)

  @id = id
  @cidr = subnet.cidr_block
  @az = subnet.availability_zone

  begin
    route_table = aws.route_table_for_subnet(id)
  rescue StandardError
    # fallback to main route table if ones not explicitly associated
    route_table = aws.route_table_for_vpc(subnet.vpc_id)
  end

  @route_table = route_table.route_table_id
  @public = route_table.routes.select { |r| r.destination_cidr_block == '0.0.0.0/0' }.first.gateway_id != nil

  self
end

#ip_addresses ⇒ Object 



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# File 'lib/terrafying/components/subnet.rb', line 90

def ip_addresses
  NetAddr::CIDR.create(@cidr).enumerate.drop(CIDR_PADDING)
end