Module: Enscalator::Plugins::AutoScale

Defined in:
lib/enscalator/plugins/auto_scale.rb

Overview

Auto scaling group plugin

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(klass) ⇒ Object

Callback to get name of the class which included this module



75
76
77
 
# File 'lib/enscalator/plugins/auto_scale.rb', line 75

def self.included(klass)
  send(:define_method, :app_template_name) { "#{klass.name.demodulize}" }
end

Instance Method Details

#auto_scale_init(image_id, auto_scale_name: nil, launch_config_props: {}, auto_scale_props: {}, auto_scale_tags: []) ⇒ String

Create new auto scaling group

Parameters:

Returns:

  • (String) —

    auto scaling group resource name



15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
 
# File 'lib/enscalator/plugins/auto_scale.rb', line 15

def auto_scale_init(image_id,
                    auto_scale_name: nil,
                    launch_config_props: {},
                    auto_scale_props: {},
                    auto_scale_tags: [])

  name = auto_scale_name || app_template_name
  auto_scale_name = "#{name}AutoScale"
  launch_config_resource_name = "#{name}LaunchConfig"
  auto_scale_resource_name = auto_scale_name
  auto_scale_key_name = gen_ssh_key_name auto_scale_name.underscore, region, stack_name

  pre_run do
    create_ssh_key auto_scale_key_name,
                   region,
                   force_create: false
  end

  resource launch_config_resource_name,
           Type: 'AWS::AutoScaling::LaunchConfiguration',
           Properties: {
             ImageId: image_id,
             InstanceType: 'm3.medium',
             KeyName: auto_scale_key_name,
             AssociatePublicIpAddress: false,
             SecurityGroups: [ref_private_security_group, ref_application_security_group]
           }.merge(launch_config_props)

  if auto_scale_props.key?(:Tags)
    warn('Do not use auto_scale_props to set Tags, auto_scale_tags is available for that purpose')
    auto_scale_props.delete_if { |k, _| k == :Tags }
  end

  auto_scale_current_tags = [
    {
      Key: 'Name',
      Value: auto_scale_name,
      PropagateAtLaunch: true
    }
  ].concat(auto_scale_tags)

  auto_scale_current_properties = {
    AvailabilityZones: availability_zones.values,
    VPCZoneIdentifier: ref_application_subnets,
    LaunchConfigurationName: ref(launch_config_resource_name),
    MinSize: 0,
    MaxSize: 1,
    DesiredCapacity: 1,
    Tags: auto_scale_current_tags
  }.merge(auto_scale_props)

  resource auto_scale_resource_name,
           Type: 'AWS::AutoScaling::AutoScalingGroup',
           Properties: auto_scale_current_properties

  # return resource name
  auto_scale_resource_name
end