Class: Terrafying::Components::LoadBalancer

Inherits:
Terrafying::Context
  • Object
show all
Includes:
Usable
Defined in:
lib/terrafying/components/loadbalancer.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, #used_by, #used_by_cidr

Constructor Details

#initialize ⇒ LoadBalancer

Returns a new instance of LoadBalancer.



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# File 'lib/terrafying/components/loadbalancer.rb', line 25

def initialize()
  super
end

Instance Attribute Details

#alias_config ⇒ Object (readonly)

Returns the value of attribute alias_config.



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# File 'lib/terrafying/components/loadbalancer.rb', line 13

def alias_config
  @alias_config
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/terrafying/components/loadbalancer.rb', line 13

def id
  @id
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/terrafying/components/loadbalancer.rb', line 13

def name
  @name
end

#ports ⇒ Object (readonly)

Returns the value of attribute ports.



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# File 'lib/terrafying/components/loadbalancer.rb', line 13

def ports
  @ports
end

#security_group ⇒ Object (readonly)

Returns the value of attribute security_group.



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# File 'lib/terrafying/components/loadbalancer.rb', line 13

def security_group
  @security_group
end

#target_groups ⇒ Object (readonly)

Returns the value of attribute target_groups.



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# File 'lib/terrafying/components/loadbalancer.rb', line 13

def target_groups
  @target_groups
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/terrafying/components/loadbalancer.rb', line 13

def type
  @type
end

Class Method Details

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



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# File 'lib/terrafying/components/loadbalancer.rb', line 17

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

.find_in(vpc, name) ⇒ Object 



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# File 'lib/terrafying/components/loadbalancer.rb', line 21

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

Instance Method Details

#attach(set) ⇒ Object 



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# File 'lib/terrafying/components/loadbalancer.rb', line 147

def attach(set)
  if set.respond_to?(:attach_load_balancer)
    set.attach_load_balancer(self)
  else
    raise "Dont' know how to attach object to LB"
  end
end

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



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# File 'lib/terrafying/components/loadbalancer.rb', line 61

def create_in(vpc, name, options={})
  options = {
    ports: [],
    public: false,
    subnets: vpc.subnets.fetch(:private, []),
    tags: {},
  }.merge(options)

  @ports = enrich_ports(options[:ports])

  l4_ports = @ports.select{ |p| is_l4_port(p) }

  if l4_ports.count > 0 && l4_ports.count < @ports.count
    raise 'Ports have to either be all layer 4 or 7'
  end

  @type = l4_ports.count == 0 ? "application" : "network"

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

  if @type == "application"
    @security_group = resource :aws_security_group, ident, {
                                 name: "loadbalancer-#{ident}",
                                 description: "Describe the ingress and egress of the load balancer #{ident}",
                                 tags: options[:tags].merge(
                                   {
                                     loadbalancer_name: ident,
                                   }
                                 ),
                                 vpc_id: vpc.id,
                               }

    path_mtu_setup!
  end

  @id = resource :aws_lb, ident, {
                   name: ident,
                   load_balancer_type: type,
                   internal: !options[:public],
                   subnets: options[:subnets].map(&:id),
                   tags: options[:tags],
                 }.merge(@type == "application" ? { security_groups: [@security_group] } : {})

  @target_groups = []

  @ports.each { |port|
    port_ident = "#{ident}-#{port[:downstream_port]}"

    target_group = resource :aws_lb_target_group, port_ident, {
                              name: port_ident,
                              port: port[:downstream_port],
                              protocol: port[:type].upcase,
                              vpc_id: vpc.id,
                            }.merge(port.has_key?(:health_check) ? { health_check: port[:health_check] }: {})

    ssl_options = {}
    if port.has_key?(:ssl_certificate)
      ssl_options = {
        ssl_policy: "ELBSecurityPolicy-2015-05",
        certificate_arn: port[:ssl_certificate],
      }
    end

    resource :aws_lb_listener, port_ident, {
               load_balancer_arn: @id,
               port: port[:upstream_port],
               protocol: port[:type].upcase,
               default_action: {
                 target_group_arn: target_group,
                 type: "forward",
               },
             }.merge(ssl_options)

    @target_groups << target_group
  }

  @alias_config = {
    name: output_of(:aws_lb, ident, :dns_name),
    zone_id: output_of(:aws_lb, ident, :zone_id),
    evaluate_target_health: true,
  }

  self
end

#find_in(vpc, name) ⇒ Object 



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# File 'lib/terrafying/components/loadbalancer.rb', line 29

def find_in(vpc, name)
  ident = "network-#{tf_safe(vpc.name)}-#{name}"
  @type = "network"

  begin
    lb = aws.lb_by_name(ident)
  rescue
    ident = "application-#{tf_safe(vpc.name)}-#{name}"
    @type = "application"

    lb = aws.lb_by_name(ident)

    @security_group = aws.security_group_by_tags({ loadbalancer_name: ident })
  end

  @id = lb.load_balancer_arn
  @name = ident

  target_groups = aws.target_groups_by_lb(@id)

  @target_groups = target_groups.map(&:target_group_arn)
  @ports = enrich_ports(target_groups.map(&:port).sort.uniq)

  @alias_config = {
    name: lb.dns_name,
    zone_id: lb.canonical_hosted_zone_id,
    evaluate_target_health: true,
  }

  self
end