Class: AWS::EC2::SubnetCollection

Inherits:
Collection show all
Includes:
Core::Collection::Simple, TaggedCollection
Defined in:
lib/aws/ec2/subnet_collection.rb

Overview

Represents a collection of VPC subnets. You can get a subnet collection two ways. You can get a collection that represents ALL subnets (across all your VPCs). You can also get a subnet collection that represents subnets within a single vpc.

# represents all subnets
subnets = ec2.subnets

# represents subnets within the named vpc
subnets = ec2.vpcs['vpc-12345'].subnets

Creating a Subnet

To create a subnet, call #create on a subnet collection, passing in a suitable CIDR block.

subnet = subnets.create('10.0.0.0/20')

You can optionally pass the availability zone you want the subnet created in.

Getting a Subnet

If you know the subnet id, you can get a subnet using #[].

subnet = subnets['subnet-id-here']

You can filter subnets as well. See the EC2 API documentation (http://docs.amazonwebservices.com/AWSEC2/latest/APIReference/ApiReference-query-DescribeSubnets.html) for a complete list of accepted filters.

subnet = subnets.filter('state', 'available').first

Instance Method Summary collapse

Methods included from Core::Collection

#each, #each_batch, #enum, #first, #in_groups_of, #page

Methods included from TaggedCollection

#tagged, #tagged_values

Methods included from FilteredCollection

#filter, #initialize

Instance Method Details

#[](subnet_id) ⇒ Subnet

Returns a subnet with the given id.

Parameters:

  • subnet_id (String)

Returns:

  • (Subnet) —

    Returns a subnet with the given id.



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# File 'lib/aws/ec2/subnet_collection.rb', line 89

def [] subnet_id
  Subnet.new(subnet_id, :config => config)
end

#create(cidr_block, options = {}) ⇒ Subnet

Creates a Subnet. Subnets require a valid CIDR block and are created inside a VPC. If this collection does not have a

Parameters:

  • cidr_block (String) —

    The CIDR block you want the subnet to cover (e.g., 10.0.0.0/24).

  • options (Hash) (defaults to: {})

Options Hash (options):

  • :vpc (VPC, String) —

    The VPC (or VPC id string) to create the subnet in.

  • :availability_zone (String, AvailabilityZone) —

    The Availability Zone you want the subnet in. AWS selects a default zone for you (recommended).

Returns:



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# File 'lib/aws/ec2/subnet_collection.rb', line 72

def create cidr_block, options = {}

  client_opts = {}
  client_opts[:vpc_id] = vpc_id_option(options)
  client_opts[:cidr_block] = cidr_block
  client_opts[:availability_zone] = az_option(options) if
    options[:availability_zone]

  resp = client.create_subnet(client_opts)

  Subnet.new_from(:create_subnet, resp.subnet,
    resp.subnet.subnet_id, :config => config)

end