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AutoscalingGroup


Resource Icon​

Resource Overview​

An Auto Scaling Group (ASG) automatically adjusts resources by launching or terminating EC2 instances based on application demand.

Associated Resources​

Parent Resources​

Connected Resources​

Resource Configuration​

Basic Settings​

  • launch_template_name : Name of the Launch Template used by the Auto Scaling Group
  • subnet_ids : List of subnet IDs where the Auto Scaling Group launches resources
  • linked_targetgroup_name : Name of the associated target group
  • desired_capacity : Target number of instances to maintain
  • min_size : Minimum number of instances to maintain
  • max_size : Maximum number of instances to maintain
  • default_cooldown : Time in seconds to wait between scaling activities

Tags​

  • tags : Tags used to categorize the resource

Autoscaling + LB Configuration​


asg01

  • First, create a basic network environment for infrastructure configuration.
  • Create one VPC and configure 2 Public Subnets and 2 Private Subnets in different Availability Zones for high availability. Also, configure Internet Gateway and Route Table for external internet communication.
  • Configure the Subnet by referring to Public Subnet Configuration.


asg02

  • Add a Load Balancer to stably handle incoming traffic from the outside.
  • Place the Load Balancer in the Public Subnet to make it accessible from the internet, place a dedicated Security Group for security control, and connect a line towards the Load Balancer.
  • To define the set of target resources to which the Load Balancer will actually deliver traffic, place a Load Balancer Target Group and connect a line in the direction [Load Balancer -> Load Balancer Target Group].
  • Select the connected Target Group in the Listener - Linked Target Group Name option of the Load Balancer.


asg03

  • Place Launch Template and Auto Scaling Group to automatically create and manage application servers.
  • Set the Launch Template Name to use in the Autoscaling Group resource options, and set the subnets where EC2 instances will be created.
  • Determine which Target Group the created EC2 instances will be automatically registered to using the Linked Targetgroup Name option.


References​