Class: Terrafying::Components::Service

Inherits:
Terrafying::Context
  • Object
show all
Includes:
Usable
Defined in:
lib/terrafying/components/service.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 ⇒ Service

Returns a new instance of Service.



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# File 'lib/terrafying/components/service.rb', line 36

def initialize()
  super
end

Instance Attribute Details

#domain_names ⇒ Object (readonly)

Returns the value of attribute domain_names.



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# File 'lib/terrafying/components/service.rb', line 24

def domain_names
  @domain_names
end

#instance_profile ⇒ Object (readonly)

Returns the value of attribute instance_profile.



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# File 'lib/terrafying/components/service.rb', line 24

def instance_profile
  @instance_profile
end

#instance_set ⇒ Object (readonly)

Returns the value of attribute instance_set.



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# File 'lib/terrafying/components/service.rb', line 24

def instance_set
  @instance_set
end

#load_balancer ⇒ Object (readonly)

Returns the value of attribute load_balancer.



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# File 'lib/terrafying/components/service.rb', line 24

def load_balancer
  @load_balancer
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/terrafying/components/service.rb', line 24

def name
  @name
end

#ports ⇒ Object (readonly)

Returns the value of attribute ports.



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# File 'lib/terrafying/components/service.rb', line 24

def ports
  @ports
end

#zone ⇒ Object (readonly)

Returns the value of attribute zone.



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# File 'lib/terrafying/components/service.rb', line 24

def zone
  @zone
end

Class Method Details

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



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# File 'lib/terrafying/components/service.rb', line 28

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

.find_in(vpc, name) ⇒ Object 



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# File 'lib/terrafying/components/service.rb', line 32

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

Instance Method Details

#allow_scrape(vpc, ports, security_group) ⇒ Object 



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# File 'lib/terrafying/components/service.rb', line 165

def allow_scrape(vpc, ports, security_group)
  prom = Prometheus.find_in(vpc: vpc)
  ports.each do |port|
    sg_rule_ident = Digest::SHA256.hexdigest("#{vpc.name}-#{port}-#{security_group}-#{prom.security_group}")
    resource :aws_security_group_rule, sg_rule_ident, {
      security_group_id: security_group,
      type: 'ingress',
      from_port: port,
      to_port: port,
      protocol: 'tcp',
      source_security_group_id: prom.security_group
    }
  end
end

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



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# File 'lib/terrafying/components/service.rb', line 44

def create_in(vpc, name, options={})
  options = {
    ami: aws.ami("base-image-59a5b709", owners=["136393635417"]),
    instance_type: "t2.micro",
    ports: [],
    instances: [{}],
    zone: vpc.zone,
    iam_policy_statements: [],
    security_groups: [],
    keypairs: [],
    volumes: [],
    units: [],
    files: [],
    tags: {},
    ssh_group: vpc.ssh_group,
    subnets: vpc.subnets.fetch(:private, []),
    startup_grace_period: 300,
    depends_on: [],
    audit_role: "arn:aws:iam::#{aws.}:role/auditd_logging",
    metrics_ports: [],
  }.merge(options)

  unless options[:audit_role].nil?
    fluentd_conf = Auditd.fluentd_conf(options[:audit_role], options[:tags].keys)
    options = options.merge_with_arrays_merged(fluentd_conf)
  end

  if ! options.has_key? :user_data
    options[:user_data] = Ignition.generate(options)
  end

  if ! options.has_key?(:loadbalancer_subnets)
    options[:loadbalancer_subnets] = options[:subnets]
  end

  unless options[:instances].is_a?(Hash) or options[:instances].is_a?(Array)
    raise 'Unknown instances option, should be hash or array'
  end

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

  @name = ident
  @zone = options[:zone]
  @ports = enrich_ports(options[:ports])
  @domain_names = [ options[:zone].qualify(name) ]

  depends_on = options[:depends_on] + options[:keypairs].map{ |kp| kp[:resources] }.flatten
  if options.key? :instance_profile
    @instance_profile = options[:instance_profile]
  else
    iam_statements = options[:iam_policy_statements] + options[:keypairs].map { |kp| kp[:iam_statement] }
    @instance_profile = add! InstanceProfile.create(ident, { statements: iam_statements })
  end

  tags = options[:tags].merge({ service_name: name })

  set = options[:instances].is_a?(Hash) ? DynamicSet : StaticSet

  if options.has_key?(:loadbalancer) # explicitly requested or rejected a loadbalancer
    wants_load_balancer = options[:loadbalancer]
  else
    # by default we want one if we are an ASG with exposed ports
    wants_load_balancer = set == DynamicSet && @ports.count > 0
  end

  instance_set_options = {
    instance_profile: @instance_profile,
    depends_on: depends_on,
    tags: tags,
  }

  if wants_load_balancer && @ports.any? { |p| p.has_key?(:health_check) }
    instance_set_options[:health_check] = { type: "ELB", grace_period: options[:startup_grace_period] }
  end

  @instance_set = add! set.create_in(vpc, name, options.merge(instance_set_options))
  @security_group = @instance_set.security_group

  if options[:metrics_ports] && !options[:metrics_ports].empty?
    allow_scrape(vpc, options[:metrics_ports], @security_group)
  end

  if wants_load_balancer
    @load_balancer = add! LoadBalancer.create_in(
                            vpc, name, options.merge(
                              {
                                subnets: options[:loadbalancer_subnets],
                                tags: tags,
                              }
                            ),
                          )

    @load_balancer.attach(@instance_set)

    if @load_balancer.type == "application"
      @security_group = @load_balancer.security_group
      @egress_security_group = @instance_set.security_group
    end

    vpc.zone.add_alias_in(self, name, @load_balancer.alias_config)
  elsif set == StaticSet
    vpc.zone.add_record_in(self, name, @instance_set.instances.map { |i| i.ip_address })
    @instance_set.instances.each { |i|
      @domain_names << vpc.zone.qualify(i.name)
      vpc.zone.add_record_in(self, i.name, [i.ip_address])
    }
  end

  if set == DynamicSet && options[:rolling_update] == :signal
    @instance_profile.add_statement!(
      {
        Effect: "Allow",
        Action: [ "cloudformation:SignalResource" ],
        Resource: [ @instance_set.stack ],
      }
    )
  end

  self
end

#find_in(vpc, name) ⇒ Object 



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# File 'lib/terrafying/components/service.rb', line 40

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

#with_endpoint_service(options = {}) ⇒ Object 



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# File 'lib/terrafying/components/service.rb', line 180

def with_endpoint_service(options = {})
  add! EndpointService.create_for(@load_balancer, @name, {
                                    fqdn: @domain_names[0],
                                    zone: @zone,
                                  }.merge(options))
end