Class: Tapjoy::AutoscalingBootstrap::Alerts::Scaling

Inherits:
Object
  • Object
show all
Defined in:
lib/tapjoy/autoscaling_bootstrap/alerts/scaling.rb

Overview

Class to handle scaling alerts

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Scaling

Initialize the class



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# File 'lib/tapjoy/autoscaling_bootstrap/alerts/scaling.rb', line 7

def initialize(config)
  @policy = Tapjoy::AutoscalingBootstrap.policy

  scale_up, scale_down = prepare(**config)

  create(config[:policy_up], scale_up)
  create(config[:policy_down], scale_down)
end

Instance Method Details

#create(policy, scale) ⇒ Object

Create alerts for autoscaling



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# File 'lib/tapjoy/autoscaling_bootstrap/alerts/scaling.rb', line 55

def create(policy, scale)

  puts "Creating scale policy: #{policy}"
  scale_policy = @policy.create(policy,
  **scale)

  scale_alert = {
    alarm:               scale[:alarm],
    comparison_operator: scale[:comparison_operator],
    evaluation_periods:  3,
    threshold:           scale[:threshold],
    actions:             [scale_policy]
  }

  puts "Creating alarms for scale policy: #{scale_policy}"
  Tapjoy::AutoscalingBootstrap::Cloudwatch.create_alarm(scale_alert)
end

#prepare(alarm_high_scale:, alarm_low_scale:, policy_up:, policy_down:, scale_up_scaling_adjustment:, scale_up_cooldown:, scale_up_threshold:, scale_down_scaling_adjustment:, scale_down_cooldown:, scale_down_threshold:, **unused_values) ⇒ Object

Prepare scaling alerts



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# File 'lib/tapjoy/autoscaling_bootstrap/alerts/scaling.rb', line 17

def prepare(alarm_high_scale:, alarm_low_scale:, policy_up:,
  policy_down:, scale_up_scaling_adjustment:, scale_up_cooldown:,
  scale_up_threshold:, scale_down_scaling_adjustment:,
  scale_down_cooldown:, scale_down_threshold:, **unused_values)

  puts 'Creating autoscale alerts and policies'

  puts 'Clearing out original CloudWatch alarms'
  Tapjoy::AutoscalingBootstrap::Cloudwatch.delete_alarm(alarm_high_scale)
  Tapjoy::AutoscalingBootstrap::Cloudwatch.delete_alarm(alarm_low_scale)
  puts "\n"

  puts 'Clearing out original scaling policies'
  @policy.delete(policy_up)
  @policy.delete(policy_down)
  puts "\n"

  puts 'Configuring autoscaling...'
  scale_up = {
    scaling_adjustment:          scale_up_scaling_adjustment,
    cooldown:                    scale_up_cooldown,
    threshold:                   scale_up_threshold,
    alarm:                       alarm_high_scale,
    comparison_operator:         'GreaterThanOrEqualToThreshold'
  }

  scale_down = {
    scaling_adjustment:          scale_down_scaling_adjustment,
    cooldown:                    scale_down_cooldown,
    threshold:                   scale_down_threshold,
    alarm:                       alarm_low_scale,
    comparison_operator:         'LessThanOrEqualToThreshold'
  }

  return scale_up, scale_down
end