-2. Using TLS Termination. If an instance becomes impaired because of an underlying hardware failure, the instance is automatically recovered. Deregister your container instance in the STOPPED state by using the Amazon ECS console or AWS Command Line Interface. You can track cloud, system, and application metrics, see them in graphical form, and arrange to be notified (via a CloudWatch alarm) if they cross a threshold value that you specify. You can define N number of instance-ids one after another with space as a delimiter. The simple approach would be to have the instance call the AWS CLI terminate-instances command: aws ec2 terminate-instances --instance-ids i-xxxxxxxx. Choose Customize. If you stop the instance, the Amazon EBS volume persists. Auto-termination (after idle) - Create a cluster with an auto-termination policy that shuts down after a specified idle time. On the Set to Standby page, choose Set to Standby. For persistent disk storage you can choose AWS EBS volumes. Most of the time the host machine. 1. Note the Description and Cause for. The JSON string follows the format provided by --generate-cli-skeleton. Click Create Role. In a single API call, a fleet can launch multiple instance types across multiple Availability Zones, using the On-Demand Instance, Reserved Instance, and Spot Instance purchasing options together. Search for CloudWatch Logs and give it ALL CLOUDWATCH LOGS actions. Once you terminated your instances, it means you. When it comes to managing your Amazon Web Services (AWS) EC2 instances, there are two important. Choose Actions, then choose Set to Standby. Spot Instances. Just to state the obvious for junior folks who might come across this: sudo shutdown now requires access to the operating system (via SSH keys, inbound security groups, etc), while aws ec2 stop-instances is an AWS CLI command which simply requires API authentication (via IAM credentials or STS tokens). Pricing is per instance-hour consumed for each instance, from the time an instance is launched until it's terminated or stopped. Give your policy a name. Amazon EC2 Hibernation. I have looked into SSM Run Command with Lambda, but given that the bot runs for days at a time, I don't believe that's viable. Navigate to the Amazon EC2 Console and click Launch Templates. Be sustainable by leveraging unused EC2 capacity. Following are the steps: 1. We would like to show you a description here but the site won’t allow us. Modify its 'disableApiStop' instance attribute and try again. By default, Amazon EC2 deletes all EBS volumes that were attached when the instance launched. Terminated instances remain visible after termination (for approximately one hour). While these terms may sound similar, they have distinct implications for your infrastructure and costs. Here’re the four stages of a Virtual Machine-status. The EC2 instance will maintain it's existing public IP. Trend Question Official Event Official Column Opportunities Organization Advent Calendar. That depends on the value of the attribute named Delete on termination of the attached AWS EBS volume. CancelJob is used when you want to clear the queue of any waiting jobs or stop a job from restarting if failed. In this blog article, we will dive into the differences between stopping and terminating EC2 instances, and discuss the scenarios in which each. (list) Replaces the security groups of the instance with the specified security groups. If you're using the Amazon EC2 API, the AWS CLI, or an AWS SDK, you. stopとterminateの違い stop インスタンスを一時的に停止させる。. For this project we will name it “stop_start_ec2instances”. When an instance is terminated, the instance performs a normal shutdown, then the attached Amazon EBS volumes are deleted unless the volume’s deleteOnTermination attribute is set to false. filter(InstanceIds = ids). In AWS, the EC2 ( Elastic cloud computing) instance is called a VM (Virtual Machine). To help expedite a resolution, include the instance ID, and describe the steps that you've already taken. An Amazon EBS volume is a durable, block-level storage device that you can attach to your instances. This processes should run for a few days. To check whether you have active EC2 instances in other Regions, do the following: 1. There is also a flag that can be set on the instance as to how instance initiated shutdown is handled. Resolution. Khác với "stop", ch. Note however that before this will work, you need to manually create at least one stop, terminate, or reboot alarm using the Amazon EC2 or CloudWatch console to create the EC2ActionsAccess IAM role. For more information, see Hibernating interrupted Spot Instances in the Amazon EC2 User Guide. You can launch multiple instances of an AMI, as shown in the following figure. If you try terminating a spot instance in the EC2 console when it's set as 'persistent', a new spot instance will spin up in its place in a few minutes. For more information, see Hibernate your On-Demand Instance or Spot Instance. A scheduled action does not persist in your account once it has reached its end time. Amazon Elastic Compute Cloud (Amazon EC2) provides on-demand, scalable computing capacity in the Amazon Web Services (AWS) Cloud. This can be stop or terminate. To help protect against data loss caused by accidental termination of an Amazon EC2 instance, consider the following options when you configure EC2 infrastructure: Turn on termination protection. The following code examples show how to stop an Amazon EC2 instance. Then, enter an email address to notify, choose 'Stop' or. On the Create action page, choose an AWS Systems Manager document to define the service action. However, once an instance starts shutting down, it's probably a little bit late to think about trying to preserve logs or export anything. 打开 Billing and Cost Management console （账单和成本管理控制台）。. Once the compute environment is in Disabled and idle,. Following is from the same EC2 doc you have linked: Each time you start a stopped instance we charge a minimum of one minute for usage. From there go to Instance state and Terminate instance. – John Rotenstein. Rebooting an instance is equivalent to rebooting an operating system. As mentioned in the comments, I suggest working with AWS Powershell Module. Step 4: Follow the steps In the Select metric paste the instance id in the metric. Amazon EC2 console. Google charges for the storage necessary to save instance memory. txt. When an EC2 instance is Stopped, the virtual machine is removed and it loses the CPU, RAM and Instance store so that it can be allocated to another user. If your instance remains in the shutting-down state for several hours, Amazon EC2 treats it as a stuck instance and forcibly terminates it. Add a comment. When you stop or hibernate an instance, we shut it down. After you remove load balancers and Elastic Load Balancing environments, you can stop or terminate Amazon EC2 instances. If other arguments are provided on the command line, those values will. Go to IAM on your AWS and click “Policies” on the left side. FYI developer support is the greater of $29 or 3% of monthly AWS charges (in the US anyway). You can stop, start, and terminate EBS-backed instances. There is an option that you can set at instance creation that will allow the instance to terminate on shutdown. EBS vs. Run a Windows PowerShell script to remove the computer from the domain. terminate ()You can add the stop, terminate, reboot, or recover actions to any alarm that is set on an Amazon EC2 per-instance metric, including basic and detailed monitoring metrics provided by Amazon CloudWatch (in the AWS/EC2 namespace), as well as any custom metrics that include the InstanceId dimension, as long as its value refers to a valid running. Any data that you enter into tags or free-form text fields used for names may be used for billing or diagnostic logs. How it works. After one minute, we charge only for the seconds you use. 2. You can restart your instance at any time. Search for the instance that you would like to delete and right click on the instance. Posted On: Jan 13, 2020. 51 1 1. After 90 days, AWS permanently deletes any content remaining in your account, and shuts down any AWS services that you didn't shut down. Note: EC2You can't use the Stop action to hibernate Spot Instances, but you can specify that Amazon EC2 should hibernate Spot Instances when they are interrupted. To prevent Amazon EC2 Auto Scaling from terminating unhealthy instances, suspend the ReplaceUnhealthy process. To force stop the instance, use the Amazon EC2 console or the AWS. Amazon EC2 Spot now allows Amazon EBS-backed instances to be stopped in the event of interruption, instead of being terminated when capacity is no longer available at your preferred price. This is easier than temporarily deleting a policy when you don't need it, and recreating it later. This task goes to the success state in Universal Controller until the EC2 instance is completely spun up or terminated. Next Attach. But I have a big list of instances that I need to terminate so I'm searching for a solution to. by Srini. Launch, list, and terminate Amazon EC2 instances. 2. Additionally, it uses an agent to connect, so trying to use the screen command would terminate when the agent terminates. Rather than asking the Amazon EC2 service to terminate an instance, you can simply call the Operating System and tell it to Stop the instance:. It consists of two parts: a number and letters. Terminate an InstanceInstance store-backed instances – The root device is temporary. On the Create on-demand backup page, choose the following options:. Here’re the differences between ec2 start, stop , and terminate. Auto Scaling is a web service designed to launch or terminate Amazon EC2 instances automatically based on user-defined policies, schedules, and health checks. To learn more, see the following resources: Amazon EC2: Amazon EC2 product page, Amazon EC2. You can retrieve this by running the following command: aws ec2 describe-instances. You can stop an Amazon EBS-backed instance, but not an Amazon S3-backed instance. To accomplish this, customers may have been required to manually attach an IAM instance profile on a per-instance basis or use. After you attach a volume to an instance, you can use it as you would use a physical hard drive. It's free to sign up and bid on jobs. When you launch AWS CloudShell, a compute environment that's based on Amazon Linux 2 is created. In the Bill details by service section, expand the Elastic Compute Cloud line item. Click here to see more information on this topic from AWS. 3. This feature helps you stop and start the instances or reboot them without worrying about Amazon EC2 Auto Scaling terminating the instances as part of its health checks or during scale-in events. yml. 2. When the Auto Scaling group scales in, Amazon EC2 Auto Scaling terminates one of the instances. aws ec2 reboot-instances --instance-ids INSTANCEID. Note that Amazon EC2 Auto Scaling terminates, rather than stops, unneeded instances. It's important to properly understand the implications of each action. By default, Amazon EC2 deletes all EBS volumes that were attached when the instance launched. Shuts down one or more instances. AWS Terminate or delete the EC2 instance example using AWS CLI command. By default, Amazon EC2 deletes all EBS volumes that were attached when the instance launched. To perform action on multiple Instances, all the above 4 commands accept space separated list of Instance IDs as below: --instance-ids INSTANCEID 1 INSTANCEID 2 INSTANCEID 3. The code uses the AWS SDK for Python to manage the. For current-generation volumes attached to current-generation instance types, you can. An instance store provides temporary block-level storage for your instance. Spot instances are up to 90% cheaper than On-Demand instances, which can significantly reduce your EC2 costs. How to Terminate EC2 instances using AWS CLI. To force stop the instance using the console. AWS Systems Manager enables you to remotely and securely manage the configuration of your Amazon EC2 instances, and your on-premises instances and virtual machines (VMs) in hybrid environments, including VMs from other cloud providers. To better understand the differences between the two volume types, see Storage options for your Amazon EC2 instances. Recover your Amazon EC2 instance automatically by using the default configuration. How. However, once an instance starts shutting down, it's probably a little bit late to think about trying to preserve logs or export anything. AWS CLI 2. Terminate instances accepts multiple instance-ids at once. During periods of low utilization, instances are automatically terminated in order to save you money. The volume will continue to persist in its availability zone. For more information, see Hibernate your On-Demand Instance or Spot Instance. When an AWS Batch job in RUNNING state is terminated ( TerminateJob ), the backend handler concerning the termination event invokes a termination event. The (windows) operating system on the EC2 runs a script on startup. Choose Create New Pipeline and enter the following information:. Quick Answer: After terminattion, it will be deleted automatically after some time. Select the group of the instance that you want to reboot. Amazon CloudWatch monitors your cloud resources and applications, including Amazon Elastic Compute Cloud (Amazon EC2) instances. If you're using the ec2 command line tools, add the option: --instance-initiated-shutdown-behavior terminate. the instance’s root device is the actual hard drive, it is "stuck" on the hardware, and the only thing you can do is terminate the instance. EBS volumes are highly available and reliable storage volumes that can be attached to any running instance and used like a hard drive. [Amazon EC2 console] Use the launch instance wizard to specify the launch parameters. Action examples are code excerpts from larger programs and must be run in context. Once launched, you'll find the controls to stop and start the spot instance like normal. --connection-id (string) The ID of the client connection to be terminated. 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. Amazon EC2 Dedicated Hosts allow you to use your eligible software licenses from vendors such as Microsoft and Oracle on Amazon EC2, so that you get the flexibility and cost effectiveness of using your own licenses, but with the resiliency, simplicity and elasticity of AWS. Click on the instance and select the Terminate option. Terminate EC2 instance using command line API. Search for jobs related to Aws ec2 stop vs terminate or hire on the world's largest freelancing marketplace with 22m+ jobs. You can use an EC2 Fleet or a Spot Fleet to launch a fleet of instances. And a more general way to title the question might be "When the OS tells its AWS instance to power down, what happens? Terminate? Stop? Something else? A Simpler Way To Replace Instance Hardware on EC2. to enable enhanced networking with ENA for the instance. However, if you cancel the spot request this will terminate the current spot instance and also prevent any. Volume. Scheduling this task using Universal Controller workflow. Scheduling this task using Universal Controller workflow. Terminate instances accepts multiple instance-ids at once. This video will demonstrate how to terminate / delete / erase a virtual machine instance from the amazon AWS cloud. This command will return a JSON output containing information about your instances. To verify the root device type of an instance, you can use the Amazon EC2 console or the AWS CLI. According to AWS Support, it is normal behavior to Terminate an instance when you tell it to Stop if it is part of an Auto Scaling group. AWS OpsWorks Stacks automatically starts and stops. Each version can have different launch parameters. These On-Demand Instances must match certain attributes, such as instance type and. I saw somewhere that I would only get. Volumes attached after instance launch continue running. According to AWS Support, it is normal behavior to Terminate an instance when you tell it to Stop if it is part of an Auto Scaling group. John Rotenstein. The hourly price for a Spot Instance is called a Spot price. To create Linux AMIs backed by instance store, you must create an AMI from your instance on the instance itself using the Amazon EC2 AMI tools. Even then you will be billed the committed amount of $1488 by AWS. update-auto-scaling-group →. An Amazon EC2 Dedicated Host is a physical server fully dedicated for. We recommend that you use Amazon EC2 to reboot your instance instead of running the operating system reboot command from your instance. Terminated instances remain visible after termination (for approximately one hour). The ec2 facts module will query the metadata service on the instance to get the instance ID. You can only terminate instance store-backed. You would typically see some kind of notification from AWS if there were a hardware failure. The following code examples show how to terminate an Amazon EC2 instance. Terminate an instance. amazon. Once you’ve selected “terminate,” you will receive a pop-up confirmation. And started again: $ aws ec2 start-instances --instance-ids instance_id. However, you can use these methods to re-create the terminated instance: Use Amazon EBS snapshots or Amazon Machine Images (AMI) backups to launch a replacement EC2 instance to that were created from the terminated Amazon EC2 instance. Launch, scale, and manage Spot Instances with ease through AWS services or integrated third parties. Your Amazon EC2 usage is calculated by either the hour or the second based on the size of the instance, operating system, and the AWS Region where the instances are launched. client ('cloudwatch') cloudWatch. To have an instance terminate itself do both of these steps: Start the instance with --instance-initiated-shutdown-behavior terminate or the equivalent on the AWS console or API call. Then, select your instance's group. It's easy to set Amazon CloudWatch alarms that detect and shut down idle Amazon EC2 instances. Excerpt from that article: "An "instance store" instance is an EC2 instance whose root device resides on the virtual machine’s hard drive. You terminated your. com By default, you can terminate your instance using the Amazon EC2 console, command line interface, or API. The halt. This operation is idempotent; if you terminate an instance more than once, each call succeeds. An Amazon Machine Image (AMI) is a template that contains a software configuration (for example, an operating system, an application server, and applications). Or if Python is already preinstalled in that instance, you can write a small python script using Boto3 that terminates the instance 12 hours after the instance is launched. The longest one was running for 3 days until I manually terminated it. Your compute environment will terminate if it is idle near the end of an AWS Billing Hour. . ec2 = boto3. Run shutdown -h now as root. Every event or log entry contains information about who generated the request. Note: You cannot start/stop a Spot Instance. aws ec2 stop-instances --instance-ids i-1234567890abcdef0 --hibernate. While these terms may sound similar, they have distinct implications. The script below will require instance ids. Terminating an EC2 Instance: Terminating an EC2 instance permanently deletes the instance along with all associated data, configurations, and resources. 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. Manual termination - Create a long-running cluster that continues. On-Demand Instances. Choose AWS Service and Lambda. amazon-ec2; aws-lambda; or ask your own question. 在导航窗格中选择 Bills （账单）。. Each partial instance-hour consumed is. This event contains metadata about the job including the JobARN. To specify which instances Amazon EC2 Auto Scaling should terminate first, choose a termination policy. If you were storing critical data on an EC2 instance in an auto-scaling group, the you were definitely using AWS incorrectly. This feature helps you stop and start the instances or reboot them without worrying about Amazon EC2 Auto Scaling terminating the instances as part of its health checks or during scale-in events. If you do this, the instance is deleted, never. You can stop, start, and terminate EBS-backed instances. The following procedure sets the threshold to 50% CPU utilization for the target instance. At this time there is not a way to STOP and EMR cluster in the same sense you can with EC2 instances. However I would really recommend scaling your ASG down to 0 and terminating the instances and relaunching them next day. On the navigation bar at the top of the screen, choose the same Region that you used when you created the Auto Scaling group. 1. edited Mar 25, 2021 at 14:01. Configure a CloudWatch alarm so that you can stop the experiment if CPU utilization exceeds the threshold that you specify. For Amazon EC2 instances, Instance Scheduler on AWS can integrate with SSM maintenance windows, defined in the same Region as those instances, to start and stop them in accordance with the maintenance window. Auto Scaling is also good for ensuring the health of an application. Ec2 Url: Enter the URL to connect to EC2. An AWS EC2 Spot Instance is an unused EC2 instance which is available for less than the On-Demand price. Explore the EC2 Instance Lifecycle. Terminated instances remain visible after termination (for approximately one hour). Inside the Compute Environment Parameters documentation for AWS Batch, there is a definition of State. Description: Provide relevant details about the pipeline as needed. In this step, I create an automation document named LifeCycleHookDoc. Amazon EC2 terminology - AMI vs. You can see this action in context in the following code example: Get started with instances. if you're using AWS Console, go to EC2 -> Instances -> Select the instances you want to terminate and use the Instance state button to terminate the selected instances. This indicates that the primary node of the cluster. This will cause your instance to terminate instead of stop when the OS halts. For console directions, see View and update the instance user data. The size appears after the full stop. So far in our AWS posts we have learned if we stop the EC2 instance the data on the EBS volumes persists. Then switch to JSON, from Visual Editor. We would like to show you a description here but the site won’t allow us. If the instance also gets stuck terminating, Amazon EC2 automatically forces it to terminate within a few hours. Select the AWS Region for your Amazon EMR cluster. The Amazon Auto Scaling service now allows you to protect instances from termination during a scale-in event. Choose Terminate. to terminate instance at address instance. You can use an EC2 Fleet or a Spot Fleet to launch a fleet of instances. CloudWatch will automatically send you a notification when the metric reaches a threshold you specify. This will test that your infrastructure is configured correctly and will survive an instance failure. 51 1 1. In AWS, the EC2 ( Elastic cloud computing) instance is called a VM (Virtual Machine). In a single API call, a fleet can launch multiple instance types across multiple Availability Zones, using the On-Demand Instance, Reserved Instance, and Spot Instance purchasing options together. [Amazon EC2 console] Create a launch template and launch the instance from the launch template. We’re selecting AWS Service for Entity Type and ‘Lambda’ for Use Case. You can also leverage the enhanced security options in Amazon VPC to provide. PDF RSS. Resolution. 1. Amazon EC2 Auto Scaling is a fully managed service designed to launch or terminate Amazon EC2 instances automatically to help ensure you have the correct number of Amazon EC2 instances available to handle the load for your application. One of the key decisions you need to make is whether to stop or terminate your EC2 instances. Reboot an Amazon EC2 instance. AWS Savings plans also have. I want to know if I get charged for stopped EC2 instances. Attach the policy that we just created and hit “Create Role”. EC2 Invoke WeDoIT. I want to change the config of EC2 instance that created by Elastic BeanStalk, but when I stop instance ( from EC2 --> Running instance --> Action) instead of stopping, the instance state change to terminated and after that go to pending and running, so I can't change instance type. When you stop or terminate a Mac instance, Amazon EC2 performs a scrubbing workflow on the underlying Dedicated Host to erase the internal SSD, to clear the persistent NVRAM variables, and to update to the latest device firmware. A deeper link to Cloudwatch EC2 Events would probably be helpful, here. Create, terminate, start, stop or restart instances. Go to console right click on the instance and select "Change termination protection". Default termination policy and mixed instances groups. You can change the size of the group manually, or you could schedule custom configurations to scale-up or scale-down as per your needs. When you disable a scaling policy, the configuration details are preserved, so you can quickly re-enable the policy. To cancel or terminate multiple AWS Batch jobs from your queue, use the AWS Command Line Interface (AWS CLI) or AWS Tools for PowerShell. consists of one or more instance store volumes exposed as block devices. To force the instance to stop using the AWS CLI, use the stop-instances command and the --force option as follows: aws ec2 stop-instances --instance-ids i-0123ab456c789d01e --force. After 60 days, the instance is automatically. ’. The terminate function is performed on a collection of instances you have already retrieved. Dynamic or predictive scaling policies let you add or remove EC2 instance capacity to service established or real-time demand patterns. 2 Answers. You would need to check that the script has finished running, and then execute the command aws ec2 terminate-instances. When you create an IAM role using the IAM console, the console creates an instance profile automatically and gives it the same name as the role to which it corresponds. After that, hit “Create Policies”. During this process, we'd like to prevent the auto-scaling group from terminating random supernumerary instances. Instance C and Instance D fail to terminate because at least one of the specified instances in us-east-1b (Instance C) is enabled for termination protection. If you use the Amazon EC2 console to launch an instance with an IAM role or to attach an IAM role to an. In this tutorial, you will use Terraform to destroy this infrastructure. Amazon EBS-backed instances – The root device is an Amazon EBS volume. py (or whatever your file is named. When you stop or hibernate an instance, we shut it down. The console might organize resources according to the Name tag, but this tag doesn't have any semantic meaning to the Amazon EC2 service. Stopping causes the instance to stop running (its status goes from running to stopping to stopped). Amazon EC2 now offers the same hibernation experience for Spot Instances as is currently available for On-Demand Instances. If you are using an instance store backed instance, your only option will be to terminate. Create a Role. I want to know if I get charged for stopped EC2 instances. Once an EC2 server is terminated, it is "gone". Action examples are code excerpts from larger programs and must be run in context. It is akin to shutting down the instance and removing it entirely from your AWS account. Modify instance user data. Two points: this question needs official (from AWS itself) definitions of "terminate" and "stop". You can’t use the Stop action to hibernate Spot Instances, but you can specify that Amazon EC2 should hibernate Spot Instances when they are interrupted. Any on-demand EC2 instance in a running state can be stopped: $ aws ec2 stop-instances --instance-ids instance_id. Stopping is different from terminating; you can’t re-start a terminated instance. EC2 is designed to make it very easy to spin up instances and terminate them at will. By default, Amazon EC2 deletes all EBS volumes that were attached when the instance launched. All of its Amazon EBS volumes remain attached, and you can start the instance again at a later time. Amazon EC2 Auto Scaling is a fully managed service designed to launch or terminate Amazon EC2 instances automatically to help ensure you have the correct number of Amazon EC2 instances available to handle the load for your application. The AWS Management Console allows you to cancel or terminate only one AWS Batch job from a job queue at a time. Amazon VPC enables you to build a virtual network in the AWS cloud - no VPNs, hardware, or physical datacenters required. Amazon Elastic Compute Cloud (EC2)¶ Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides resizable computing capacity—literally, servers in Amazon’s data centers—that you use to build and host your software systems. The encryption keys are generated using the hardware module and are unique to each NVMe instance storage device. Select the resource type that you want to back up; for example, choose EC2 for Amazon EC2. It selects the Availability Zone with two instances, and terminates the instance that was launched from the oldest launch. If you cancel a Spot Instance request, an EC2 Fleet, or a Spot Fleet, Amazon EC2 terminates any associated Spot Instances that are stopped. Sau khi "stop", chúng ta có thể quay trở lại và khởi động máy trên AWS. Image: Enter the I(ami) ID to use for the instance. Use this option to terminate all active connections for the specified user. You can use Amazon EC2 to launch as many or as few virtual servers as you need, configure security and networking,. Take note that there is a big difference between stop and terminate. Even then you will be billed the committed amount of $1488 by AWS. Termination means deletion so please be cautious and I recommend using --dry-run and --no-dry-run commands for being safe side. Click Create Role. The volume will continue to persist in its availability zone. You can add the stop, terminate, or reboot, actions to any alarm that is set on an Amazon EC2 per-instance metric, including basic and detailed monitoring metrics provided by Amazon CloudWatch (in the AWS/EC2 namespace), in addition to any custom metrics that include the "InstanceId=" dimension, as long as the InstanceId value refers to a valid. Reserved Instances provide you with significant savings on your Amazon EC2 costs compared to On-Demand Instance pricing. Using the commandline, navigate to the above file and type: python terminate_ec2_instances. When scaling-in, instances are terminated.