Class: OpenStax::Aws::AutoScalingGroup

Inherits:
Object
  • Object
show all
Defined in:
lib/openstax/aws/auto_scaling_group.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, region:) ⇒ AutoScalingGroup

Returns a new instance of AutoScalingGroup.



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# File 'lib/openstax/aws/auto_scaling_group.rb', line 11

def initialize(name:, region:)
  @raw_asg = Aws::AutoScaling::AutoScalingGroup.new(
    name: name,
    client: Aws::AutoScaling::Client.new(region: region)
  )
  @region = region
end

Instance Attribute Details

#raw_asg ⇒ Object (readonly)

Returns the value of attribute raw_asg.



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# File 'lib/openstax/aws/auto_scaling_group.rb', line 3

def raw_asg
  @raw_asg
end

#region ⇒ Object (readonly)

Returns the value of attribute region.



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# File 'lib/openstax/aws/auto_scaling_group.rb', line 3

def region
  @region
end

Class Method Details

.physical_resource_id_attribute ⇒ Object 



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# File 'lib/openstax/aws/auto_scaling_group.rb', line 7

def self.physical_resource_id_attribute
  :name
end

Instance Method Details

#add_tags_not_handled_by_cloudformation(stack_tags) ⇒ Object 



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# File 'lib/openstax/aws/auto_scaling_group.rb', line 41

def add_tags_not_handled_by_cloudformation(stack_tags)
  alarms.each { |alarm| alarm.add_tags_not_handled_by_cloudformation stack_tags }
end

#alarms ⇒ Object 



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# File 'lib/openstax/aws/auto_scaling_group.rb', line 33

def alarms
  client.describe_policies(
    auto_scaling_group_name: raw_asg.name
  ).flat_map(&:scaling_policies).flat_map(&:alarms).map do |alarm|
    OpenStax::Aws::Alarm.new region: region, name: alarm.alarm_name
  end
end

#desired_capacity ⇒ Object 



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# File 'lib/openstax/aws/auto_scaling_group.rb', line 29

def desired_capacity
  raw_asg.desired_capacity
end

#increase_desired_capacity(by:) ⇒ Object 



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# File 'lib/openstax/aws/auto_scaling_group.rb', line 19

def increase_desired_capacity(by:)
  # take the smaller of max size or desired+by (or this call raises an exception)
  increase_to = [raw_asg.max_size, raw_asg.desired_capacity + by].min

  raw_asg.set_desired_capacity(
    {
      desired_capacity: increase_to
    })
end