Class: Terrafying::Components::Instance

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Usable

#egress_security_group, #ingress_security_group, #path_mtu_setup!, #pingable_by, #pingable_by_cidr, #security_group, #used_by, #used_by_cidr

Constructor Details

#initialize ⇒ Instance

Returns a new instance of Instance.



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

def initialize()
  super
end

Instance Attribute Details

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/terrafying/components/instance.rb', line 10

def id
  @id
end

#ip_address ⇒ Object (readonly)

Returns the value of attribute ip_address.



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# File 'lib/terrafying/components/instance.rb', line 10

def ip_address
  @ip_address
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/terrafying/components/instance.rb', line 10

def name
  @name
end

#subnet ⇒ Object (readonly)

Returns the value of attribute subnet.



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# File 'lib/terrafying/components/instance.rb', line 10

def subnet
  @subnet
end

Class Method Details

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



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

def self.create_in(vpc, name, options={})
  Instance.new.create_in vpc, name, options
end

.find_in(vpc, name) ⇒ Object 



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

def self.find_in(vpc, name)
  Instance.new.find_in vpc, name
end

Instance Method Details

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



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# File 'lib/terrafying/components/instance.rb', line 30

def create_in(vpc, name, options={})
  options = {
    public: false,
    instance_type: "t2.micro",
    instance_profile: nil,
    ports: [],
    tags: {},
    security_groups: [],
    depends_on: [],
  }.merge(options)

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

  @name = name
  @ports = enrich_ports(options[:ports])

  @security_group = resource :aws_security_group, ident, {
                               name: "instance-#{ident}",
                               description: "Describe the ingress and egress of the instance #{ident}",
                               tags: options[:tags],
                               vpc_id: vpc.id,
                               egress: [
                                 {
                                   from_port: 0,
                                   to_port: 0,
                                   protocol: -1,
                                   cidr_blocks: ["0.0.0.0/0"],
                                 }
                               ],
                             }

  path_mtu_setup!

  if options.has_key? :ip_address
    lifecycle = {
      lifecycle: { create_before_destroy: false },
    }
  else
    lifecycle = {
      lifecycle: { create_before_destroy: true },
    }
  end

  if options.has_key? :subnet
    @subnet = options[:subnet]
  else
    subnets = options.fetch(:subnets, vpc.subnets[:private])
    # pick something consistent but not just the first subnet
    subnet_index = XXhash.xxh32(ident) % subnets.count
    @subnet = subnets[subnet_index]
  end

  @id = resource :aws_instance, ident, {
                   ami: options[:ami],
                   instance_type: options[:instance_type],
                   iam_instance_profile: options[:instance_profile] && options[:instance_profile].id,
                   subnet_id: @subnet.id,
                   associate_public_ip_address: options[:public],
                   root_block_device: {
                     volume_type: 'gp2',
                     volume_size: 32,
                   },
                   tags: {
                     'Name' => ident,
                   }.merge(options[:tags]),
                   vpc_security_group_ids: [
                     vpc.internal_ssh_security_group,
                   ].push(*options[:security_groups]),
                   user_data: options[:user_data],
                   lifecycle: {
                     create_before_destroy: true,
                   },
                   depends_on: options[:depends_on],
                 }.merge(options[:ip_address] ? { private_ip: options[:ip_address] } : {}).merge(lifecycle)

  @ip_address = output_of(:aws_instance, ident, options[:public] ? :public_ip : :private_ip)

  self
end

#find_in(vpc, name) ⇒ Object 



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

def find_in(vpc, name)
  raise 'unimplemented'
end