ASG

Jan 1, 0001

Definition

ASG stands for Auto Scaling Group, a feature in cloud computing environments such as AWS that automatically adjusts the number of compute resources, like EC2 instances, based on demand. This helps maintain application availability and optimize costs by scaling resources up or down according to predefined conditions or metrics, such as CPU utilization or request count.

Secure Settings Example

Resources:
  MyAutoScalingGroup:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      MinSize: 2
      MaxSize: 10
      DesiredCapacity: 4
      VPCZoneIdentifier:
        - subnet-12345678
      LaunchConfigurationName: MyLaunchConfig
      HealthCheckType: EC2
      HealthCheckGracePeriod: 300
      Tags:
        - Key: Name
          Value: MySecureASG
          PropagateAtLaunch: true
      TerminationPolicies:
        - "OldestInstance"
        - "ClosestToNextInstanceHour"

Insecure Settings Example

Resources:
  MyAutoScalingGroup:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      MinSize: 0
      MaxSize: 100
      DesiredCapacity: 0
      VPCZoneIdentifier:
        - subnet-12345678
      LaunchConfigurationName: MyLaunchConfig
      HealthCheckType: ELB
      HealthCheckGracePeriod: 0
      Tags:
        - Key: Name
          Value: MyInsecureASG
          PropagateAtLaunch: false
      TerminationPolicies:
        - "NewestInstance"