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 23

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 11

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 11

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 11

def name
  @name
end

#subnet ⇒ Object (readonly)

Returns the value of attribute subnet.



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# File 'lib/terrafying/components/instance.rb', line 11

def subnet
  @subnet
end

Class Method Details

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



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# File 'lib/terrafying/components/instance.rb', line 15

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 19

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 31

def create_in(vpc, name, options = {})
  options = {
    public: false,
    eip: false,
    instance_type: 't3a.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!

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

  if options.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

  associate_public_ip_address = options[:eip] || options[:public]

  @id = resource :aws_instance, ident, {
    ami: options[:ami],
    instance_type: options[:instance_type],
    iam_instance_profile: profile_from(options[:instance_profile]),
    subnet_id: @subnet.id,
    associate_public_ip_address: associate_public_ip_address,
    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 = @id[options[:public] ? :public_ip : :private_ip]

  if options[:eip]
    @eip = resource :aws_eip, ident, {
      instance: @id,
      vpc: true
    }
    @ip_address = @eip[:public_ip]
  end

  self
end

#find_in(_vpc, _name) ⇒ Object 



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# File 'lib/terrafying/components/instance.rb', line 27

def find_in(_vpc, _name)
  raise 'unimplemented'
end

#profile_from(profile) ⇒ Object 



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# File 'lib/terrafying/components/instance.rb', line 121

def profile_from(profile)
  profile.respond_to?(:id) ? profile.id : profile
end