tf resource "aws_appautoscaling_target" "service" { service_namespace = "ecs" scalable_dimension = "ecs:service:DesiredCount" min_capacity = var. For your particular situation, you could use a User Data script that retrieves this value and then updates the Tag of the instance accordingly. 2. The first way to use the template is to set up the scheduled automatic deletion of any stack that has already been created. aws-lambda-lifecycle-hooks-function Using Auto Scaling lifecycle hooks, Lambda, and EC2 Run Command Introduction. Terminate instances accepts multiple instance-ids at once. Click on the check box associated with the Auto Scaling group you want to update. Saves up to 90% of AWS EC2 costs by automating the use of spot instances on existing AutoScaling groups. AutoScalingGroup class. I am developing an application that monitors the instances of an Autoscaling group with the goal of work with its elasticity. The above pretty much works for me, but can be a bit wasteful in general. Open the Auto Scaling groups page of the Amazon EC2 console. aws autoscaling put-scaling-policy --policy-name my-simple-scale-in-policy --auto-scaling-group-name my-asg --scaling-adjustment -1 --adjustment-type ChangeInCapacity --cooldown 180. For more information, see Scaling cooldowns for Amazon EC2 Auto Scaling in the Amazon EC2 Auto Scaling User Guide. service file into the. Example 2: Keep instances in the Running state. Create, modify, and delete EC2 Launch Templates, which can be used to create individual instances or with Autoscaling Groups. This starts the policy creation wizard. So, in the above script we are moving the delete_dns. Go to the CloudFormation console, select the stack you created, and delete it. We demonstrated the ElastiCache for Redis new auto scaling feature using a Python script to simulate a high load on our cluster where the cluster must scale up using our configured auto scaling policy to meet the demand. Upvoted this answer because describe-auto-scaling-groups is a lot faster than describe-auto-scaling-instances. You will see that the CloudFormation script deployed the environment with the Desired, Minimum, and Maximum capacity values set to 0. Prerequisites. Convenient to deploy at scale using StackSets. Data tiering (cluster mode enabled) clusters running Redis engine version 7. Install and configure Jenkins. EC2 can also be found in services under the “ Compute ” submenu. 1. First, enter a. You could then use this with Target tracking scaling policies for Amazon EC2 Auto Scaling - Amazon EC2 Auto Scaling, which will calculate the average value of the metric and. In the scenario when an equal number of instances are there in multiple availability zones, Auto Scaling group selects the Availability Zone with the instances that use the oldest launch. Automating the shutdown of EC2 Instances is one very effective method for controlling costs. ) and when it scales in (shuts down instances) to leave the swarm ( docker swarm leave ). Step 1: Define Parameters. Auto Scaling group: In Amazon EC2, you have the option to set up Amazon EC2 Auto Scaling to make sure that you have the optimal number of EC2 instances to handle your workload. To get started, see the AWS Tools for Windows PowerShell User Guide. Now, your Ansible AWX and autoscaling groups are ready. You need the ARN when you create the CloudWatch. For example, using OpenStack Heat - nodes are automatically given a hostname based on the number of nodes in the autoscaling group: instance_group: type: OS::Heat::ResourceGroup properties: count: {. These scaling policies can be triggered from an AWS CloudWatch alarm or can be triggered via an API call. Scale your infrastructure worldwide and manage resources across all AWS accounts and regions through a single operation. Your launch template or launch configuration must specify this role using an IAM instance profile. The goal of describing the manual process is to help users better understand the solution so they can modify the code to suit specific needs. To signal Amazon EC2 Auto Scaling when the lifecycle action is complete, you must add the CompleteLifecycleAction API call to the script, and you must manually create an IAM role with a policy that allows Auto Scaling instances to call this API. From the official definition: Auto Scaling is a web service designed to launch or terminate Amazon EC2 instances automatically based on user-defined policies, schedules, and health checks. Capacity Rebalancing complements the capacity optimized allocation strategy (designed to help find the most. Disconnect from your Windows instance. For more information, see the Application Auto Scaling User Guide. A lifecycle hook provides a specified amount of time. Launched in May of 2009, EC2 Auto Scaling is designed to help you maintain application availability by providing three key benefits: improving fault tolerance, increasing application availability, and lowering costs. You can't set the default cooldown when you initially create an Auto Scaling group in the Amazon EC2 Auto Scaling console. connect_autoscale () ec2 =. When an instance is paused, it remains in a wait state until either you complete the lifecycle action using the complete-lifecycle-action CLI command or. Create a Systems Manager automation document. Part of AWS Collective. sudo chkconfig --list mysqld sudo. Scaling can be performed on a schedule, or based on a runtime metric, such as CPU or memory usage. To delete the Auto Scaling group without waiting for the instances in the group to terminate, use the --force-delete option. ps1 -Schedule. 1. Amazon EC2 Auto Scaling ensures that your application always has the right capacity to handle the traffic demand, and saves costs by launching instances only when they are needed. For your particular situation, you could use a User Data script that retrieves this value and then updates the Tag of the instance accordingly. The following example specifies a user data. Now if you navigate to the AMI section you will see a new image is created and is on pending. The plan is to create EC2 instances and stop the instances. For more information, see Suspending and resuming scaling processes in the Amazon EC2 Auto Scaling User. sh script. Include a script in your user data to launch an apache webserver. In the EC2 console, scroll to the bottom of the left menu to select “Auto Scaling Groups,” then click “Create auto scaling group. Create an Amazon EC2 Auto Scaling launch template with the latest. I am going to: 1. Is there an easy way to get such 2-minute notification for second case? First and foremost, the AWS autoscaling group is a container for multiple instances that are based on a launch configuration. . You schedule scaling to increase the group size at a specified time. The issue is that when deploying the auto-scaled launch config I lose the ability to allow it to. If your instance remains in the shutting-down state longer than a few minutes, it might be delayed due to shutdown scripts being run by the instance. m3. The action the Auto Scaling group takes when the lifecycle hook timeout elapses or if an unexpected failure occurs. Auto Scaling group. I'm bootstrapping an Amazon Elastic Compute Cloud (Amazon EC2) Windows instance using the cfn-init (cfn-init. Every managed node is provisioned as part of an Amazon EC2 Auto Scaling group that's managed for you by Amazon EKS. When you launch an instance in Amazon EC2, you have the option of passing user data to the instance that can be used to perform common automated configuration tasks and even run scripts after the instance starts. ASGs can take. xlarge, and db. Check out for more information. Tasks. To follow this guide you need to have the following. In this section, we are going to see how to terminate multiple EC2 instances at the same time using the AWS CLI command. Lets say I have crontask. You can use autoscaling group lifecycle hooks to prevent the ASG from terminating an instance before the hook is marked as complete. This tutorial walks you through setting up an AWS Lambda function that is triggered by CloudWatch Events and automatically changes the min, max and desired instances in your Auto Scaling Group (s). service file into the. Amazon EC2 Auto Scaling is designed to automatically launch and terminate EC2 instances based on user-defined scaling policies, scheduled actions, and health checks. LaunchConfigurationName (string) – The name of the launch configuration. Create an Amazon EC2 Auto Scaling launch template with the latest. Instance hibernate: EC2 instances support hibernation. The aws-node-termination-handler (NTH) can operate in two different modes: Instance Metadata Service (IMDS) or the Queue Processor. AWS CodeDeploy enables developers to automate code deployments to Amazon EC2 and on-premises instances. This script would execute anything that you need to shutdown which would be scripts under /usr/share/services for example. The first step is to install GitLab Runner in an EC2 instance that will serve as the runner manager that spawns new machines. aws autoscaling delete-auto-scaling-group --auto-scaling-group-name my-asg. In certain cases, GitHub cannot guarantee that jobs are not assigned to persistent runners while they are shut down. For more information on CloudTrail, see Monitoring Amazon RDS API calls in AWS CloudTrail. Shutdown Scripts. Today we are announcing that Karpenter is ready for production. 0 of the aws provider. I’m performing terraform apply, that destroys and creates a new ec2 instance. services:. ECS also allows you too have scheduled tasks which is perfect. In certain cases, GitHub cannot guarantee that jobs are not assigned to persistent runners while they are shut down. If needed, you can update this after the group is created. To configure scale-in controls for an autoscaled MIG: In the Google Cloud console, go to the Instance groups page. If I want to make some changes to the systems' configuration (say update the libssl package), I see two options: (1) run packer / manually create a new AMI and setup my auto scaling group to use it. The valid values are Minimum, Maximum, and Average. 0. Amazon EC2 attempts to shut an instance down cleanly and run any system shutdown scripts; however, certain events (such as hardware failure) may prevent these system. Autoscaling can't be used with the following previous-generation instance classes that have less than 6 TiB of orderable storage: db. The script spawns 40 processes and iterates over a loop to insert random keys, so the shard slots are evenly utilized. The aws-node-termination-handler (NTH) can operate in two different modes: Instance Metadata Service (IMDS) or the Queue Processor. I am in the process of setting up an auto scaling group in AWS with a custom AMI. Because of this, Terraform may report a difference in its planning phase. Autoscaling group EC2 (windows instances) turns 5 instances on every couple of minutes if the queue is not empty, (I currently manually boost the max computers on when the queue is larger). Add a lifecycle hook. For more examples of launch templates, see the Examples section in the AWS::EC2::LaunchTemplate resource and the Examples section in the AWS::AutoScaling::AutoScalingGroup resource. Create an Autoscaling Target. The halt. There is a costed way of doing it within AWS but getting customers to pay the extra $2. For Tag key, enter DEV-TEST. MetricAggregationType (string) – The aggregation type for the CloudWatch metrics. For example, in the screenshot, ttl-stack will delete my-demo-stack after 120 minutes. The simple approach would be to have the instance call the AWS CLI terminate-instances command: aws ec2 terminate-instances --instance-ids i-xxxxxxxx. The aws-node-termination-handler Instance Metadata Service Monitor will run a small pod on each host to perform monitoring of IMDS paths like /spot or /events and react accordingly to drain and/or cordon the. Use the -Select parameter to control the cmdlet output. Example 1: Keep instances in the Stopped state. Amazon Elastic Container Service (Amazon ECS) gives customers the flexibility to scale their containerized deployments in a variety of different ways. 1. When the group increases, I want it to add itself into a pool. Amazon EC2 Auto Scaling helps you maintain application availability and allows you to automatically add or remove EC2 instances according to conditions that you define. I have an auto-scaling group (ASG) on AWS. If we are able to disable the processes that trigger up/down scaling, we are back to the container that just holds instances. GitHub recommends implementing autoscaling with ephemeral self-hosted runners; autoscaling with persistent self-hosted runners is not recommended. 2. Set up AWS Lambda function that receives state messages from SQS, sends a remote command with SSM to initiate graceful shutdown on the EC2 instance. About Amazon ECS scheduling Amazon ECS is a container orchestrator that’s designed to be able to launch and track application […] Introduction. I'm assuming you are using the AWS management console. . Running script or command on EC2 instance on termination . What I tried so far: - Created an ECS task. The name of the lifecycle hook. Create AWS Identity and Access Management (IAM). import { //update the existing import to add aws_lambda and Duration aws_lambda as lambda, Duration, } from 'aws-cdk-lib'; constructor (scope: Construct, id. Find the complete example and learn how to set up and run in the AWS Code Examples Repository . . For example, notifying an auditing. Can scale down, even if the cluster is not idle, by looking at shuffle file state. Using the IAM service console, create an IAM policy by clicking on the "Create policy" button. ) Creates or updates a warm pool for the specified Auto Scaling group. You can use it to build resilient, highly scalable applications that react to changes in load by launching or terminating Amazon EC2 instances as needed, all driven by system or user-defined metrics collected and tracked by Amazon CloudWatch. 1 Answer. GitHub recommends implementing autoscaling with ephemeral self-hosted runners; autoscaling with persistent self-hosted runners is not recommended. Here are the broad strokes of the process: # AWS_Billing_Overage_Shutdown. Example usage; Create a basic launch template; Specify tags that tag instances at launch. After the instance is put into hibernation the instance is stopped. This script installs Python packages and starts a Python web server on the instance. The choice will come down to which features and. (Note: the Auto Scaling group must exist first for this to work. When Amazon EC2 Auto Scaling launches a new instance or moves an instance from a warm pool into the Auto Scaling group, the instance inherits the instance scale-in protection setting of the Auto Scaling group. In this post, we showed how you could scale your clusters horizontally by setting up auto scaling policies. When a job appears in the queue, the AWS Lambda function will trigger the Auto Scaling group to increase its capacity. 1 Answer. The first step in this project would be to manually launch 3 EC2 instances. Spot instances are up to 90% cheaper than On-Demand instances, which can significantly reduce your EC2 costs. PROJECT. You may consider to run your script using AWS Data Pipeline. If you suspend either the Launch or Terminate process types, it can prevent other process types from functioning properly. Amazon EC2 Auto Scaling User Guide Example usage. autoscaling_group modules can, instead of specifying all parameters on those tasks, be passed a Launch Template which contains settings like instance size,. The lifecycle hooks for the specified group. For more information, see the AWS Tools for PowerShell Cmdlet. When you disable a scaling policy, the configuration details are preserved, so you can quickly re-enable the policy. 1. 12. For more information, checkout this AWS tutorial located here. To specify which instances Amazon EC2 Auto Scaling should terminate first, choose a termination policy. AWS CLI is installed and configured with a valid AWS account with permission to deploy the autoscaling group and application load balancer. Tasks can be scaled-out to react to an influx of requests or they can be scaled-in to reduce cost. aws autoscaling set-instance-health --instance-id i-123abc45d --health-status healthy You can get instance-id using curl call, the script that we place in the userdata. The AWS CLI v2 offers several new features including improved installers, new configuration options such. The first tab available is the Details tab, showing information about the Auto Scaling group. In the AWS Management Console, navigate to the EC2 Dashboard. The issue is that when deploying the auto-scaled launch config I lose the ability to allow it to. Instance sizes - Large, XLarge, 2XLarge. For AWS Auto Scaling, what is the first transition state an instance enters after leaving steady state when scaling in due to health check failure or decreased load?. Optimized autoscaling has the following characteristics: Scales up from min to max in 2 steps. After instance autoscales, having a boot up script(e. For more information, see Suspend and resume a process for an Auto Scaling group . To return a specific number of launch configurations, use the --max-items option. If the page was added in a later version or removed. Click Next. For more information, see Automate starting and stopping AWS instances. A warm pool is a pool of pre-initialized EC2 instances that sits alongside the Auto Scaling group. Example 4: Return instances to the warm pool when scaling in. Create a key pair using Amazon EC2. In the notification settings, add a notification to your SNS topic for the terminate event. Click Edit to view the group's current configuration, including its autoscaling settings. Add the new instance to the affected deployment group. This is how long Amazon EC2 Auto Scaling needs to wait before checking the health status of an instance after it enters the InService state. 12. g UserData in Linux) with AWS EC2 CLI commands to associate an Elastic IP address you have allocated to your account writing a command. Auto Scaling lifecycle hooks. Clean up tutorial resources. 01. When prompted for confirmation, choose Stop. Amazon EC2 Auto Scaling now lets you control which instances to terminate during a scale-in event by allowing you to provide a custom function that selects which instances to terminate. Uses tagging to avoid launch configuration changes. An ASG is a collection of Amazon EC2 instances, treated as a logical group for automatic scaling and management purposes. This command produces no output. To define an AWS Lambda function, add a CDK construct to create an AWS Lambda function inside the constructor defined in the lib/circleci-self-hosted-runner-autoscaling-stack. This group will turn off three instances when the CPU average across the whole pool drops to 20% and add three instances when CPU reaches 70%. Select the group of the instance that you want to reboot. m3. In the navigation pane, under Auto Scaling, choose Auto Scaling Groups. So, we turn to a relatively unknown addition to ASGs, the Lifecycle Hook. If you already have one, you can skip to step 4. The script will be also invoked on shutdown and termination. aws autoscaling delete-auto-scaling-group --auto-scaling-group-name my-asg --force-delete. Use Application Auto Scaling to configure auto scaling for resources beyond just EC2, either with scaling policies or with scheduled scaling. In the EC2 console, scroll to the bottom of the left menu to select “Auto Scaling Groups,” then click “Create auto scaling group. This only put scale-in protection for new instances and not on the instances already inservice. Abstract implementation of AmazonAutoScaling. Activate Amazon EC2. Intro. I’m performing terraform apply, that destroys and creates a new ec2 instance. In this case send any remaining logs to s3. Scale out by one instance if average CPU usage is above 70%, and scale in by one instance if CPU usage falls below 50%. News, articles and tools covering Amazon Web Services (AWS), including S3, EC2, SQS… The user (or process) is then responsible for completing the lifecycle action via an AWS API call, resulting in the shutdown of the terminated EC2 instance. Or what if there is a systemd shutdown script that should run before an instance is terminated. When the auto-scaling group scales out (spawns new instance) I'd like to run a command on the instance to join the Docker swarm (i. Choose one of the shards in the redisautoscalingrg cluster and observe the CPU utilization metrics. AWS ECS uses a percent-based model to define the number of containers to be run or shut down during a rolling update. You can use hibernation instead of stopping the instance. 7 onwards. , Linux Ubuntu 16. Now create the Lambda that will start and stop your instances: Make sure to pick Python 2. :param server_startup_script_file: The path to a Bash script file that is. Instance type families - R7g, R6g, R5, M7g, M6g, M5, C7gn. The instance is in an auto-scaling group that runs a REST web service, so there are most likely requests. 24. In the following command, replace the example instance ID with your own. Create an Amazon EC2 Auto Scaling group. You need the ARN when you create the CloudWatch. Terminate an instance. Amazon EC2 Auto Scaling helps you ensure that you have the correct number of Amazon EC2 instances available to handle the load for your application. When you use an OS command, the instance stops by default. You can check the settings before & after enabling these services to start on boot using the following commands. Configure Lifecycle Hooks for your Autoscaling group. You schedule scaling to increase the group size at a specified time. Available for instances. 6. 11. Create an Amazon EC2 Auto Scaling policy that uses target tracking scaling policies or step scaling policies. Use the search box on the console navigation bar to search for CloudShell and then choose the CloudShell option. You can automatically scale your cluster horizontally by adding or removing shards or replica nodes. You can automatically scale your cluster horizontally by adding or removing shards or replica nodes. As you can see, this operation is not automatic. Select the check box next to the Auto Scaling group that you just created. If the group has instances or scaling activities in progress, use the delete-auto-scaling-group command with the --force-delete option. Avoid scaling spikes: start scaling earlier, in smaller chunks, and more frequently. You will need to. 2xlarge. d/myscript and a symlink to /etc/rc0. Posted On: Jul 29, 2021. Ease of creating on-demand resources on AWS can sometimes lead to over-provisioning or under-utilization of AWS resources like Amazon EC2 and Amazon RDS. Choose a distribution that both Docker and GitLab Runner support, like. ; Replace t2. The easiest way is to create symlink in /etc/rc0. These are the available methods:Short description. The setup is an auto-scaling group of EC2 instances that each act as. Reliable fallback to on-demand instances. The detach-instances api will also remove the. FSx for Windows File Server combined with AWS Auto Scaling lets you optimize your resources by scaling them based on your needs and simplifies management tasks. A warm pool is a pool of pre-initialized EC2 instances that sits alongside an Auto Scaling group. With lifecycle hooks, instances remain in a wait state either until you notify Amazon EC2 Auto Scaling that the specified lifecycle action is complete, or until the timeout period ends (one hour by default). ; If you are using an ec2 instance to run Terraform, ensure you. Since ASGs are dynamic, Terraform does not manage the underlying instances directly. Then use aws ec2 terminate-instances like you are doing. You can suspend and resume individual processes or all processes. Step 1 — Launch an Auto Scaling group that spans 2 subnets in your default VPC. I have been trying to get IP details of all instances in each auto scaling groups which I have listed using paginator and printed using print asg ['AutoScalingGroupName'] import boto import boto3 client = boto3. Autoscaling can't be used with the following previous-generation instance classes that have less than 6 TiB of orderable storage: db. Installs in minutes using CloudFormation or Terraform. I'm running a Docker swarm deployed on AWS. In a nutshell, EC2 Auto Scaling ensures that your application: Has just the right amount of compute when you need it by detecting. If the new instances stay healthy and finish their warm-up period, Amazon EC2 Auto Scaling can continue to replace other instances. Sorted by: 119. For Amazon EC2. Under. 0put a # in front of tags then hit “esc” “:wq”. Select the Auto Scaling group Instances tab; one instance state value should show the lifecycle state “Terminating:Wait”. Amazon EC2 Auto Scaling Warm Pools now support two new features: you can now hibernate your Warm Pool instances and you can configure your Auto Scaling group to return running instances to a Warm Pool on scale-in. Amazon ElastiCache for Redis now supports auto scaling to automatically adjust capacity to maintain steady, predictable performance at the lowest possible cost. Autoscaling usually works by scaling "out/in" (adding more/less instances) rather than scaling "up/down" (upsizing/downsizing the instance type). That can stay as it is, simply click on Create Tag to create a new tag. On the Tags tab underneath the instance details, choose Add tags. An AWS EC2 Spot Instance is an unused EC2 instance which is available for less than the On-Demand price. Example 3: Keep instances in the Hibernated state. When an Auto Scaling group needs to scale in, replace an unhealthy instance, or re-balance Availability Zones, the instance is terminated, data on the instance is lost and any on-going tasks are interrupted. Create an Auto Scaling Group Navigate to EC2 > Auto Scaling > Auto Scaling Groups; Click Create Auto Scaling group. Autoscaling operations aren't logged by AWS CloudTrail. Termination policies define the termination criteria that is used by Amazon EC2 Auto Scaling when choosing which instances to terminate. Select the check box next to the Auto Scaling group that you just created. Application Auto Scaling. On the Automatic scaling tab, in Scaling policies, choose Create predictive scaling policy. Your approach of using lifecycle hooks with AWS Auto Scaling and Lambda functions to handle the attachment and detachment of EBS volumes in your specific use case is indeed a feasible solution. Terraform. Click the name of an autoscaled MIG from the list to open that group's overview page. You can then manage the number of running instances manually or dynamically, allowing you to lower operating costs. Then say on Ubuntu/Debian you would do something like this to add it to your shutdown sequence: Step 1 - Create IAM Policy and Role. Alternatively, to create a new launch template, use the following procedure. Please note that this will only work when creating a new Auto Scaling Group. You can also view and manage scheduled scaling using the Amazon EC2 console. Follow. Here we looked at using Launch Templates and Auto Scaling Groups to achieve the same result. 2xlarge. 38Open the Launch templates page of the Amazon EC2 console. AbstractAmazonAutoScalingAsync. Suspends the specified auto scaling processes, or all processes, for the specified Auto Scaling group. Write down the Name of your autoscaling group. Attribute-based instance type selection is a feature for Amazon EC2 Auto Scaling, EC2 Fleet, and Spot Fleet that makes it easy to create and manage instance type flexible capacity requests. For us, our graceful shutdown must wait for builds to finish before it can terminate an instance, a process which can take half an hour or more. The script can retrieve the instance ID from the instance metadata and signal Amazon EC2 Auto Scaling when the bootstrap scripts have completed successfully. This only put scale-in protection for new instances and not on the instances already inservice. Step 1: Create an AMI of the instance. ElastiCache for Redis uses AWS Application Auto Scaling to. That way, the shutdown script would only have to sync data added/changed in the previous 5 minutes. m3. The underlying assumption of the second. You are logged off the instance and the instance shuts down. To signal Amazon EC2 Auto Scaling when the lifecycle action is complete, you must add the CompleteLifecycleAction API call to the script, and you must manually create an IAM role with a policy that allows Auto Scaling instances to call this API. Amazon EC2 metric dimensions. A DB instance can contain multiple user-created databases. According to the documentation, if you did not assign a specific termination policy to the group, it uses the default termination policy. I can cover Presto/Trino cluster setup on AWS EC2 autoscaling group in a separate post. You can use the following dimensions to refine the. I have an EC2 autoscaling group which will initially be set to 0, after a manually run process an SSM document is triggered which sets the ASG to 3, however I need each instance to be fully up and running before the next of the 3 is started launching. Tasks can be scaled-out to react to an influx of requests or they can be scaled-in to reduce cost. To avoid issues with unexpected terminations when using Amazon EC2 Auto Scaling, you must design your application to respond to this scenario. For more information, see Amazon EC2 Auto Scaling lifecycle hooks in the Amazon EC2 Auto Scaling User Guide. The * in the preceding code denotes that this policy is applicable to all DB instance names. You can use the AWS CloudFormation template provided in this post to: Create a Systems Manager parameter. Call the group ASG-SQS. Tasks. With autoscaling this is not directly possible to assign an Elastic IP to autoscaled instances. ts file. However, when instance gets destroyed. aws ec2 stop-instances --instance-ids i-1234567890abcdef0 --hibernate. The green circle indicates that the Gitlab Runner is ready for use. Orchestrate yourself - don't create a scale in/out (dows/upcale) rule for your Auto Scaling Group, and use a custom CloudWatch alarm for when you should up/downscale (e. The maximum time, in seconds, that can elapse before the lifecycle hook times out. json. If you want to put scale-in protection on a specific instance, you need to do Instance Management -> actions -> Set scale-in protection. For more information, see IAM role for applications that run on Amazon EC2 instances. So after all, 2 instances are terminated and one new. For more information on CloudTrail, see Monitoring Amazon RDS API calls in AWS CloudTrail. This topic describes how to temporarily disable a scaling policy so it won't initiate changes to the number of instances the Auto Scaling group contains.