A. Modify the CloudFormation template to include an UpdatePolicy attribute for the Auto Scaling group. Include the AutoScalingRollingUpdate policy with MinInstancesInService of 4 and MaxBatchSize of 2. Whenever a software update is needed, alter either or both of the ImageId and UserData of the AWS::EC2::LaunchTemplate and update the stack. Most Voted
B. Set the Auto Scaling group’s minimum capacity to 4. Create an AWS CodeDeploy deployment group that has an in-place deployment type. Select Amazon EC2 Auto Scaling group for the environment configuration. Whenever a new revision is available, create a new CodeDeploy deployment that has a deployment configuration of CodeDeployDefault HalfAtATime.
C. Set the Auto Scaling group’s minimum capacity to 4. Create an AWS CodeDeploy deployment group that has a blue/green deployment type. Select Amazon EC2 Auto Scaling group for the environment configuration. Whenever a new revision is available, create a new CodeDeploy deployment that has a deployment configuration of CodeDeployDefault HalfAtATime.
D. Modify the CloudFormation template to include a StackPolicy. Designate an AutoScalingReplacingUpdate policy to control the update. Specify MinInstancesInService of 4 and MaxBatchSize of 2. Whenever a software update is needed, alter either or both of the ImageId and UserData of the AWS::EC2::LaunchTemplate and update the stack.