aws autoscaling shutdown script. You can specify the minimum number of instances in each Auto Scaling group, and Amazon EC2 Auto Scaling ensures that. aws autoscaling shutdown script

 
 You can specify the minimum number of instances in each Auto Scaling group, and Amazon EC2 Auto Scaling ensures thataws autoscaling shutdown script Amazon EC2 Spot Instances are spare compute capacity in the AWS Cloud available to you at steep discounts compared to On-Demand Instance prices

EC2 Auto Scaling is available in all commercial and AWS GovCloud (US). Open the Auto Scaling groups page of the Amazon EC2 console. Create an Amazon EC2 Auto Scaling group. Tasks. Select a launch template. Conclusion. Create a security group that allows traffic from the internet and associate it with the Auto Scaling group instances. . Under. For more information, see the AWS Tools for PowerShell Cmdlet. Under Basic information, for Function name, enter the name of your function. C) Add the existing web application instances to an Auto Scaling group behind an Application Load Balancer. To avoid a race condition between the reboot and recover actions, avoid setting the same evaluation period for both a reboot alarm and a recover alarm. PROJECT. Prerequisites. You can identify the causes of many deployment failures by reviewing the log files created during the deployment process. 1 Answer. Prerequisites. Check ec2-modify-instance-attribute command for --user-data property. For example, the value can be used to differently configure a specific instance within an Auto Scaling group. Amazon EC2 Auto Scaling User Guide Example usage. 12. Select the check box next to the Auto Scaling group that you just created. For Value, enter Auto-Shutdown. Scale out by one instance if average CPU usage is above 70%, and scale in by one instance if CPU usage falls below 50%. Now using AWS web console, go to the instance of the EC2 service. Write down the Name of your autoscaling group. ; Replace t2. 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. 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. User data shell scripts must start with the #! characters and the path to the interpreter you want to read the script (commonly /bin/bash). Create or edit a deployment group to include the Auto Scaling group. The issue is that when deploying the auto-scaled launch config I lose the ability to allow it to. I know that the instance shutdown with the shutdown command. Description ¶. 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. Because of this, Terraform may report a difference in its planning phase. Specifying -Select '*' will result in the cmdlet returning the whole service response. 16 votes, 20 comments. Take your instance out of standby using the following command. Be sure to replace YOUR-INSTANCE-ID with your instance's resource ID and YOUR_ASG_NAME with your EC2 Auto Scaling group's name. It also replaces instances that were terminated due to demand spike in specific Spot Instance pools. This starts the policy creation wizard. Actually it happens very often, almost once a day. Terminates the specified instance and optionally adjusts the desired group size. An Auto Scaling group also lets you use Amazon EC2 Auto Scaling features such as health check replacements and scaling policies. Prerequisites. Instance type families - R7g, R6g, R5, M7g, M6g, M5, C7gn. That instance is also part of an auto-scaling group, which scales on the group's CPU. For more information about rebooting an instance, see Reboot Your Instance in the Amazon EC2 User Guide for Linux Instances. If you already have one, you can skip to step 3. The first step is to install GitLab Runner in an EC2 instance that will serve as the runner manager that spawns new machines. The following example specifies a user data. Our first step is to find the EC2 instance we want to automatically turn off. For Auto Scaling group name, enter a name for your Auto Scaling group. Posted On: Jul 29, 2021. 25. ; If you are using an ec2 instance to run Terraform, ensure you. You need the ARN when you create the CloudWatch. 0. This ensures that your application has the compute capacity that you expect. 0 Published 12 days ago Version 5. Part of AWS Collective. Now if you navigate to the AMI section you will see a new image is created and is on pending. For more information, see Suspending and resuming scaling processes in the Amazon EC2 Auto Scaling User Guide. The launch configuration is set to pass in a user-data script that runs the desired job on first boot. 2. To verify whether your time, date, and time zone are configured correctly, check the Start time, End time, and Time zone values in the Scheduled actions table on the Automatic scaling tab for your Auto Scaling group. Choose Create function. Create an Auto Scaling group. Downscaling caused by scaling policies of autoscaling group (based on average cluster cpu usage in 5 mins, random instance is terminated). For more information, see Automate starting and stopping AWS instances. This example updates the specified Auto Scaling group to use Elastic Load Balancing health checks. For Value, enter Auto-Shutdown. Can that be accomplished with boto? There must be some relation between the ASG and the instances as boto has the shutdown_instances method within the boto. To create or update tags for an Auto Scaling group. I am now trying to add a warm pool to the ASG (warm_pool block in the API). ts file. Graceful shutdown is triggered by the ACPI shutdown button press event from the hypervisor. A Spot Price is the hourly rate for a Spot instance. For that you need two components: aws_launch_template; aws_autoscaling_group; Thus, instead of your "my-ec2-instance your would create corresponding aws_launch_template. 12. Step 9. ) and when it scales in (shuts down instances) to leave the swarm ( docker swarm leave ). If you already have one, you can skip to step 4. 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. 1 Answer. Create an Autoscaling Target. Launch an Auto Scaling group that spans 2 subnets in your Custom VPC. When the group launches EC2 instances, their state is “pending. Initiate a shutdown on the nodeX EC2 instance using the EC2 API directly or Abstracted scripts. For more information, see Amazon EC2 Auto Scaling lifecycle hooks in the Amazon EC2 Auto Scaling User Guide. Then when the group decreases, I want to ensure that every connection cleanly closes. 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. If you have custom health checks, you can send the information from your health checks to Amazon EC2 Auto Scaling so that Amazon EC2 Auto Scaling can use this information. ElastiCache for Redis uses AWS Application Auto Scaling to. This will remove the deployment bundle and shut down the Auto Scaling groups. Shutdown Scripts. Suspends the specified auto scaling processes, or all processes, for the specified Auto Scaling group. Lightsail doesn't support Auto Scaling. E. Uses tagging to avoid launch configuration changes. (Auto Scaling implemented) Is there a possibility for the Fargate task to exit gracefully (to complete all the processes within the task before shutting it down)?No (but Yes). Data tiering (cluster mode enabled) clusters running Redis engine version 7. However, when instance gets destroyed. 1,000 handler operations. 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. Step 4: Create an Auto Scaling Group. 1. The terminal will give. connect_autoscale () ec2 =. Click the name of an autoscaled MIG from the list to open that group's overview page. 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. You need the ARN when you create the CloudWatch. Amazon Elastic Container Service (Amazon ECS) gives customers the flexibility to scale their containerized deployments in a variety of different ways. Suspends the specified auto scaling processes, or all processes, for the specified Auto Scaling group. The EC2 instances in the ASG run a user-data bash script when they launch. These are the available methods:Short description. By default, this cooldown period is set to 300 seconds (5 minutes). If the output includes a NextToken field, there are more launch configurations. Intro. You will see that the CloudFormation script deployed the environment with the Desired, Minimum, and Maximum capacity values set to 0. large, db. Important: If you use the Instance Scheduler for EC2 instances with an encrypted Amazon Elastic Block Store (Amazon EBS), then your instances can't be started. For example, you can change the Amazon Machine Image (AMI) for an Auto Scaling group at any time by changing the launch template or launch configuration. The standby state works as follows to help you temporarily remove an instance from your Auto Scaling group: You put an instance into the standby state. 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. That way, the shutdown script would only have to sync data added/changed in the previous 5 minutes. S3 customization reference. In a nutshell, EC2 Auto Scaling ensures that your application: Has just the right amount of compute when you need it by detecting. Example usage; Create a basic launch template; Specify tags that tag instances at launch. 25. To delete the Auto Scaling group without waiting for the instances in the group to terminate, use the --force-delete option. For example, notifying an auditing. That can stay as it is, simply click on Create Tag to create a new tag. Upvoted this answer because describe-auto-scaling-groups is a lot faster than describe-auto-scaling-instances. Description¶. {"payload":{"allShortcutsEnabled":false,"fileTree":{"scripts":{"items":[{"name":"scale-down. 0 onwards. You can use hibernation instead of stopping the instance. Examples: Scale out to 10 instances on weekdays, and scale in to 4 instances on Saturday and Sunday. One of the following two issues causes this error: 1. Run shutdown -h now as root. If you suspend either the Launch or Terminate process types, it can prevent other process types from functioning properly. These permissions allow CloudWatch logging and EC2 startup and shutdown. Launch an Auto Scaling group that spans 2 subnets in your default vpc. 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: {. Saves up to 90% of AWS EC2 costs by automating the use of spot instances on existing AutoScaling groups. Every managed node is provisioned as part of an Amazon EC2 Auto Scaling group that's managed for you by Amazon EKS. How to refresh AWS Autoscaling Group using Boto3 after increase instances? 1. Whether you are running one Amazon EC2 instance or thousands, you can use Amazon EC2 Auto Scaling to detect impaired Amazon EC2 instances, and replace the instances without intervention. I think incorporating a few ideas from the built-in autoscaling process in EC2 may help you out here: Yes, I would build a master AMI that has everything loaded you need it to. amazonaws:aws-java-sdk-code-generator") public class AbstractAmazonAutoScaling extends Object implements AmazonAutoScaling. . By Deepthi Chelupati and Chad Schmutzer AWS now offers Capacity Rebalancing for Amazon EC2 Auto Scaling, a new feature for proactively managing the Amazon EC2 Spot Instance lifecycle in an Auto Scaling group. The default value is 'Activities'. For more information, see Monitor CloudWatch metrics for your Auto Scaling groups and instances in the Amazon EC2 Auto Scaling User Guide. View the default metrics that Amazon EC2 sends to CloudWatch for the following 5 minutes of activity from the start time. I am developing an application that monitors the instances of an Autoscaling group with the goal of work with its elasticity. Once Auto Scaling decides to terminate an instance in response to a scaling policy, it uses a Termination Policy to determine which instance to. You can specify the minimum number of instances in each Auto Scaling group, and Amazon EC2 Auto Scaling ensures that. 2. Your launch template or launch configuration must specify this role using an IAM instance profile. For example, notifying an auditing. Launch an Amazon EC2 instance. Spot instances are up to 90% cheaper than On-Demand instances, which can significantly reduce your EC2 costs. Workspaces on the standard pricing plan use standard autoscaling. 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. To prevent Amazon EC2 Auto Scaling from terminating unhealthy instances, suspend the ReplaceUnhealthy process. Add the new instance to the affected deployment group. The AWS Command Line Interface (AWS CLI) is a unified tool to manage your AWS services. Update-ASAutoScalingGroup -AutoScalingGroupName my-asg -HealthCheckType ELB -HealthCheckGracePeriod 60. I want to list all instances that are currently running within a auto scaling group. If you want to put scale-in protection on a specific instance, you need to do Instance Management -> actions -> Set scale-in protection. Part of AWS Collective. 7 onwards. You can use the following. SHUTDOWN scripts on Ubuntu must be run as a service, and all services must be in the location /etc/systemd/system/. You can add the complete-lifecycle-action command to the script. EC2 (Elastic Compute Cloud) EC2 Image Builder. A split pane opens up in the bottom of the Auto Scaling groups page. The function also receives the AWS EC2 auto scaling group name as an environment variable. When scaling-out, new instances are launched into the Auto Scaling group. Description: VpcId of your existing Virtual Private Cloud (VPC)To get the scaling policies for an Auto Scaling group (AWS CLI) Before you delete a scaling policy, use the following describe-policies command to see what scaling policies were created for the Auto Scaling group. 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. In this article we will launch a pre-configured amazon EC2 instance with an Apache webserver pre-installed from the AMI we have already created, and create and. To keep the policy in forecast only mode, keep Scale based on forecast turned off. d/ starting with S01 so the script will be executed first in the sequence of scripts. A lifecycle hook provides a specified amount of time. Part one of this series focused on using CloudWatch Event Rules and. The script is located in the following directory by default: C:ProgramDataAmazonEC2-WindowsLaunchScripts. For example, you can suspend the HealthCheck and ReplaceUnhealthy processes to reboot instances without Amazon EC2 Auto Scaling terminating the instances based on its health checks. 0 onwards. The CircleCI 1. With autoscaling this is not directly possible to assign an Elastic IP to autoscaled instances. Wait for existing connections to drain, either by monitoring existing connections to your application or by allowing a "safe" amount of time. sudo shutdown now -h (The -h tells it to 'halt' the virtual hardware, which signals to the EC2 instance that the computer is now turned off, much like your home computer turns itself off after a 'Shutdown' command. The user-data script runs shutdown at the end to move the. aws autoscaling delete-auto-scaling-group --auto-scaling-group-name my-asg. 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. In my ‘Steady Performance with AWS auto scaling’ Article I demonstrated how to configure a highly available and scalable cloud deployment with EC2 auto scaling. For more information, see Deleting your Auto Scaling infrastructure in the Amazon EC2 Auto. This example adds two tags to the specified Auto Scaling group. - Created an ECS cluster with 1 machine to run the task. On the navigation bar at the top of the screen, choose the same Region that you used when you created the Auto Scaling group. Here’s how to build an example Auto Scaling group using the new CLI tools. Instance hibernate: EC2 instances support hibernation. exe) helper scripts in AWS CloudFormation. The Auto Scaling group should have a min of 2 and max of 5. The VPC resources are the largest part of most infrastructure. Create, modify, and delete EC2 Launch Templates, which can be used to create individual instances or with Autoscaling Groups. Create an Amazon EC2 Auto Scaling policy that uses target tracking scaling policies or step scaling policies. When the group launches EC2 instances, their state is “pending. When an Auto Scaling group needs to scale in, replace an unhealthy instance, or re-balance. 38Open the Launch templates page of the Amazon EC2 console. When instances reach a wait state, Amazon EC2 Auto Scaling sends a notification. sudo chkconfig --list mysqld sudo. ElastiCache for Redis uses AWS Application Auto Scaling to. Record the policy's Amazon Resource Name (ARN). Disconnect from your Windows instance. ) Make sure there is at least 1 instance in the Auto Scaling group. Once you’ve run a job, the self-hosted runners will appear in the CircleCI web interface when they are launched. Whenever your application needs to scale out, the Auto Scaling group can draw on the warm pool to meet its new desired capacity. terminate an EC2 instance by default, AutoScaling will: Choose 2 answers A. These hooks let you create solutions that are aware of events in the Auto Scaling instance lifecycle, and then perform a custom action on instances when the corresponding lifecycle event occurs. The user-data script runs shutdown at the end to move the. Just verify if this is working as expected by scaling up your ASG group using the command: aws autoscaling update-auto-scaling-group --auto-scaling-group-name django-application-poc --min-size 1 --max-size 3 --desired-capacity 2. Lightsail doesn't support Auto Scaling. AWS sets the Spot price for each instance type in each availability zone based. By Deepthi Chelupati and Chad Schmutzer AWS now offers Capacity Rebalancing for Amazon EC2 Auto Scaling, a new feature for proactively managing the Amazon EC2 Spot Instance lifecycle in an Auto Scaling group. For more information, see Suspending and Resuming Scaling Processes in the Amazon EC2 Auto Scaling User Guide. Alternatively, to create a new launch template, use the following procedure. Example 2: To hibernate an Amazon EC2 instance. Viewed 817 times. An instance refresh can replace instances one at a time, several at a time, or all at once. sh script. There is a costed way of doing it within AWS but getting customers to pay the extra $2. I have an auto-scaling group (ASG) on AWS. GitHub recommends implementing autoscaling with ephemeral self-hosted runners; autoscaling with persistent self-hosted runners is not recommended. modify the desired instance number in ASG. I have an auto-scaling group (ASG) on AWS. The code is placed in the below GitHub repository which will be referred in this post. The launch configuration is set to pass in a user-data script that runs the desired job on first boot. Create an Amazon EC2 Auto Scaling group. Here are the broad strokes of the process: # AWS_Billing_Overage_Shutdown. Create an Amazon EC2 Auto Scaling launch template with the Microsoft. aws autoscaling exit-standby --instance-ids YOUR-INSTANCE-ID --auto-scaling-group-name YOUR-ASG-NAME. It checks if the instance is part of an Auto Scaling group. To avoid issues with unexpected terminations when using Amazon EC2 Auto Scaling, you must design your application to respond to this scenario. Sorted by: 1. 1. The following steps walk you through assigning tags for a scheduled stop and start: On the Amazon RDS console, choose a database and the instance within that database that you want to add tags to. ECS also supports different deployment options, including rolling deployments. Rather than using Scaling Policies to Launch/Terminate instances for an Auto Scaling group, it is possible to attach/detach specific instances. You can use autoscaling group lifecycle hooks to prevent the ASG from terminating an instance before the hook is marked as complete. For Launch template , choose an existing launch template. Reliable fallback to on-demand instances. Before you begin this tutorial, create an Auto Scaling group, if you don't have one already. Latest Version Version 5. g. 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. The longest one was running for 3 days until I manually terminated it. Automated spot termination handling. 1 Answer. GitHub recommends implementing autoscaling with ephemeral self-hosted runners; autoscaling with persistent self-hosted runners is not recommended. The latest Terraform binary is installed and configured in your system. Navigate to your EC2 Dashboard and find the EC2 instance you want to automatically shut down. You can do this from the EC2 console or CLI: aws autoscaling put-lifecycle-hook --lifecycle-hook-name my-lifecycle-hook --auto-scaling-group-name My_AutoScalingGroup Amazon EC2 Auto Scaling uses termination policies to determine which instances it terminates first during scale-in events. 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. In the navigation pane, choose Instances. You can automatically scale your cluster horizontally by adding or removing shards or replica nodes. Prerequisites. The functionality exists within OpenStack Heat using index - but I cannot find anything on doing so with AWS autoscaling groups. In the AWS Management Console, navigate to the EC2 Dashboard. json. For more information, checkout this AWS tutorial located here. • Amazon EC2 Auto Scaling – Launch or terminate EC2 instances by increasing or decreasing the desired. The maximum time, in seconds, that can elapse before the lifecycle hook times out. In my ‘Steady Performance with AWS auto scaling’ Article I demonstrated how to configure a highly available and scalable cloud deployment with EC2 auto scaling. Scaling can be performed on a schedule, or based on a runtime metric, such as CPU or memory usage. Start EC2 instance. Scripts for automatically shutting down EC2 instances on billing alerts. . In this post, we showed how you could scale your clusters horizontally by setting up auto scaling policies. you can get private IP address using describe-instances – Ben Kim Dec 20, 2019 at 1:33Auto Scaling is a key AWS service. 24. The first step in this project would be to manually launch 3 EC2 instances. Presumably, ASG instances must be terminated during scale in events. For example, the value can be used to differently configure a specific instance within an Auto Scaling group. On x86 Mac instances, automatic software updates are disabled. When an Auto Scaling group with a mixed instances policy scales in, Amazon EC2 Auto Scaling still uses termination policies to prioritize which instances to terminate, but first it identifies which of the two types (Spot or On-Demand) should be terminated. Amazon EC2 Auto Scaling helps you maintain application availability through fleet management for EC2 instances, which detects and replaces unhealthy instances, and by. System information OS Platform and Distribution (e. In this case send any remaining logs to s3. A Spot Price is the hourly rate for a Spot instance. If the new instances stay healthy and finish their warm-up period, Amazon EC2 Auto Scaling can continue to replace other instances. In my testbed I am looking into a F5 BigIP VE with a autoscaling group. You would need a way to control a specific worker remotely, because AWS will select a particular instance. Hierarchy. This notification can come from sources such as. (2) use a configuration management tool. The instances are only on for half. The instance is started using a recurring schedule action that raises the min and max to 1. Choose the AWS CloudShell icon on the console navigation bar. With attribute-based instance type selection, you can define your instance requirements such as number of vCPUs and memory, and let EC2 Auto. 5. if you really want to do this with CLI, you may first want to use aws autoscaling suspend-processes command to prevent ASG from creating new instances. Go to the CloudFormation console, select the stack you created, and delete it. Find your EC2 Instance and click “+” in the Alarm Status column. For a more advanced solution, use the AWS Instance Scheduler. There is a costed way of doing it within AWS but getting customers to pay the extra $2. Available for instances. Reliable fallback to on-demand instances. 2. Tag the instance with a unique EC2 instance tag. Create an Auto Scaling Group. In the AWS console head over to the search bar and type in “EC2”. The script will be also invoked on shutdown and termination. For more information on CloudTrail, see Monitoring Amazon RDS API calls in AWS CloudTrail. Optimized autoscaling has the following characteristics: Scales up from min to max in 2 steps. Sorted by: 119. terraform apply -target=aws_security_group. aws autoscaling describe-scheduled-actions --auto-scaling-group-name MY-ASG-NAME. To use Warm Pools with your Amazon ECS cluster, you simply need to set the ECS_WARM_POOLS_CHECK environment variable to true in the User data of your Amazon EC2 Auto Scaling Group launch template. The setup is an auto-scaling group of EC2 instances that each act as. So we have a large AWS Autoscale requirement (100+ instances) and I'm discovering that there isn't a way for the AWS Autoscale to scale down based on each individual instance's CPU usage - it only looks at the Autoscale's collective CPU usage. What I tried so far: - Created an ECS task. Activate Amazon EC2. Diego Natali, AWS Cloud Support Engineer. 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. 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. My cfn-init script signals back too early. It can take a few minutes for the instance to stop. 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. I did like the simple script below I found on this blog. Follow. About Amazon ECS scheduling Amazon ECS is a container orchestrator that’s designed to be able to launch and track application […] Introduction. I have done the following: - Configured EC2 instance w/ startup script to assign IP - Configured launch config and auto-scale group per spec. We recommend that you set reboot alarms to three. My goal is to automatically assign an elastic IP to an auto-scaled EC2 instance. 1 Answer. Nathan Mcguirt, AWS Solution Architect Using automation to extend Auto Scaling functionality Auto Scaling provides customers a great way to dynamically scale applications, and we frequently meet customers with new and interesting use cases who want to extend Auto Scaling with additional actions. Queries that are running will complete execution before the node is decommissioned. 01. When scaling-in, instances are terminated. This will create a new instance in the ASG group,. Optimized autoscaling has the following characteristics: Scales up from min to max in 2 steps. You can then manage the number of running instances manually or dynamically, allowing you to lower operating costs. : as-terminate-instance-in-auto-scaling-group --decrement-desired-capacity i-d15ea5eProblem: Fargate tasks are being shut down without completing the processes within the task upon scaling in. The aws-node-termination-handler (NTH) can operate in two different modes: Instance Metadata Service (IMDS) or the Queue Processor. When instances reach a wait state, Amazon EC2 Auto Scaling sends a notification. The green circle indicates that the Gitlab Runner is ready for use. Amazon EC2 Auto Scaling helps to maintain your Amazon EC2 instance availability.