Confirm the termination when prompted. The recommended practice is to delete AWS EC2 instances that have not been in use for a long time to save costs. It is network-attached storage that persists even when an EC2 instance is stopped or terminated. 04 Select the Amazon EC2 instance that you want to protect against accidental termination. Specifically, I do this to get the "StateReason" field so I can be sure the ec2 instance terminated correctly. If the instance also gets stuck terminating, Amazon EC2 automatically forces it to terminate within a few hours. instance-state-code - The state of the instance, as a 16-bit unsigned integer. Under Basic information, for Function name, enter the name of your function. If the instance also gets stuck terminating, Amazon EC2 automatically forces it to terminate within a few hours. It is located on the disks of the host computer. Here is the code for a Node. If you changed the instance type to an instance built on the Nitro System, status checks fail if you migrated from an instance that does not have the required ENA and NVMe drivers. And started again: $ aws ec2 start-instances --instance-ids instance_id. May 19, 2020 at 5:04. im trying out EC2 for the first time today and I am noticing right away that once you create an instance, if you terminate it, it will still appear in your list as a re-usable instance. Double check the value for deleteOnTermination value. response = ec2. In the AWS FIS API, the value is a string in ISO 8601 format. Amazon Elastic Compute Cloud (Amazon EC2) provides on-demand, scalable computing capacity in the Amazon Web Services (AWS) Cloud. Using Amazon EC2 reduces hardware costs so you can develop and deploy applications faster. Terminated instances remain visible after termination (for approximately one hour). Now, I understand I can attach. Terminate the instance. In the navigation pane, under Elastic Block Store, choose Snapshots. Every Amazon EC2 instance has a primary ENI on eth0. Use one of the following methods to remove terminated instances from your EC2 Auto Scaling group that are still listed as Healthy and InStandby:You signed in with another tab or window. Each instance has a DisableApiTermination attribute with the default value of false (the instance can be terminated through Amazon EC2). Amazon Elastic Block Storage (EBS) is a service that provides virtual disks for use with Amazon EC2. Improve this answer. This command will return a JSON output containing information about your instances. Shuts down one or more EC2 instances. Open the Amazon EC2 console: Go to the AWS Management Console and navigate to the EC2 service by clicking on "EC2" in the services list. So let's start with what is AutoScaling group. If the entry is not deleted after several hours, contact Support. once the instance is terminated, the line-item stays visible for about an hour. Detach from any session as described above: Ctrl + B, D. Terminated instances remain visible after termination (for approximately one hour). Aug 11, 2013 at 19:46. all() retrieves a list of all instances, and there is a state attribute that contains the Name of the state. Amazon EC2 instances are a combination of virtual processors (vCPUs), memory, network, graphics processing units (GPUs), and, in some cases, instance storage. Let’s see how that works. I have created an EC2 instance in us-west-2. To terminate active resources under different services, do the following: 1. 2. If you'd like to delete your environment, follow these instructions: Log into the Management Console, then select the region your environment is in from the drop-down menu in the upper right of the page. billing I set up an EC2 Linux t2. Note that currently, not all regions support Amazon EventBridge Scheduler. filter(InstanceIds = ids). By default, Amazon EC2 deletes all EBS volumes that were attached when the instance launched. Terminate the instance using the AWS Command Line Interface (AWS CLI). If following code sample is saved in a file named terminate_ec2. It will only terminate an instance that's returned by the function. within this period, we can know the details of the machine as it was while. aws. If termination protection is on. Describes the status of the specified instances or all of your instances. If you are finished with the container instance, terminate the underlying Amazon EC2 instance. To delete a key pair using the Console, follow these steps: 1. The RAM contents are. Terminated instances remain. ”. For more information about the differences between rebooting, stopping, hibernating, and terminating instances, see Instance lifecycle in the Amazon EC2 User Guide. Can I access the metrics data for a terminated Amazon EC2 instance or a deleted Elastic Load Balancer? Yes. For the Elastic Beanstalk application, if you check "Configuration - Capacity", you will find the Max and Min instance number, you can test if you set both Max and Min to 1 instance, and wait couple of day to see if the instance is replaced (check the instance ID is not changed). In AWS infrastructure, We create a lot of EC2 instances on demand and we tend to forget about the stopped instances considering that it is stopped. For more information, see Scheduled events for your instances. Highlights, direct from Amazon's mouth: if you do manage to hibernate the OS your Instance will still be in a running state i. Under Compute, click Instances. By default, Amazon EC2 deletes all EBS volumes that were attached when the instance launched. The state shows as terminated. Skip directly to the demo: 0:32For more details see the Knowledge Center article with this video: Skip directly to the demo: 0:35For more details, see the Knowledge Center article associated with this video: I have only four running instances with those particular tags. For more information, see List and filter using the CLI in the Amazon EC2 User Guide. Charged for the seconds used. I am using AWS EC2 free tier now. It will be easier if I get the instance name in the notification Email. Choose Next: Configure Instance Details to continue the setup process. ¹ A Spot Instance goes into the instance-stopped-by-user state if you stop the instance or run the shutdown command from the instance. The valid values are: 0 (pending), 16 (running), 32 (shutting-down), 48 (terminated), 64 (stopping), and 80 (stopped). Terminate the Elastic Beanstalk environment. Terminating your instance is essentially deleting it, it will take some time to get reflected on your dashboard (meaning it won't appear on your instance list table) There is no use of terminated instances. EC2 -> Instances -> Spot Requests. When you stop an instance, we attempt to shut it down forcibly after a short while. instance-state-name - The state of the instance ( pending. If you had EBS Volume attached without flag for 'delete on termination' you can recover those data. py create in the command line, a new EC2 instance will be created with the specified parameters like the Amazon Machine Image, Instance Type, key-pair. In this example, we are adding a tag with Key as “Department”, and it’s Value as “Finance”. The following code examples show how to stop an Amazon EC2 instance. A custom termination policy is useful if it's known when an instance is sufficiently redundant or underutilized so that it can be terminated. IMPORTANT: All EC2 activities are performed using Amazon's EC2 engine and rely on a valid Amazon EC2 service account in order to function correctly. In the Stop Instances dialog box, review the instance details then click Yes, Stop to confirm your action. What prevents my S3 bucket from being terminated?Instance reboot. On the GUI I cannot see the terminated instance. Delete Amazon. resource ('ec2') # iterate through instance IDs and terminate them. Finally, on the next confirmation pop-up, choose Yes to confirm the termination of the AWS instance. By default, Amazon EC2 deletes all EBS volumes that were attached when the instance launched. In the Configure storage section, keep the default settings. 5. aws ec2 describe-instances --filters "Name=tag:Name,Values=my-instance" Something like this should be returned (this is just a small subset of the output. Terminated instances remain visible after termination (for approximately one hour). All resources attached to the instance persist through starts and stops, but data is erased if the instance. Terminated instances remain visible after termination (for approximately one hour). The alarm should terminate the instance as an action if some condition based on the metric matches. On the Create on-demand backup page, choose the following options:. The instance must be healthy and reachable. Reload to refresh your session. I have an account AWS Educate and I'm trying to launch 6 EC2 instances. For Configure Instance Details, perform the following actions: Select Enable hibernation as an additional stop behavior checkbox available next. instances. 2xlarge instance type and click Review and Launch. Terminate an Amazon EC2 instance using an AWS SDK. response = ec2. Any data that was stored locally on the instance will be lost. If you specify hibernation as the interruption behavior, you receive an interruption notice, but you do not receive a two-minute warning because the hibernation process begins immediately. Choose Actions, Delete snapshot. There was an Elastic IP related to this configuration and had to remove by. The instance is switched from unlimited to standard. In the Terminate Instances dialog box, review the instance details then click Yes, Terminate to confirm your action. 3. resource('ec2') instances = ec2. I want to know a few things related to this: Is there any significant difference b/w Delete and Terminate? What is the use of terminated instances? What are the cases in which an instance gets terminated? amazon-web. ec2. amazon-ec2; amazon-web-services; command-line-interface; Share. If you terminate the EBS backed instance, it will remove it from the list of running instance, including it's allocated EBS volume. my "list-instances" command lists them as they come over the API but the console does, too. from the snapshot, make an image. NuGet packages:The terminate-instances command returns a variety of information about the terminated instance, including the instance ID, current status, and many others. you can use multiple filters in a single command they are joined with an AND (&&)operation , and. If you launch an instance that isn't within the AWS Free Tier, you are billed after you launch the instance and charged for the time that the instance is running, even if it remains idle. Navigate to your AWS Account Management Console on your browser. Release all. So what you can do: check your snapshots and Volumes in the ec2 console. The instance is. So effectively state is no longer tracking that EC2 instance which was created in us-west-2. 1 Answer. Use these methods to prevent instance termination and volume deletion: Activate termination protection of the EBS volume when you launch an EC2 instance. if you have root volumes, make a snapshot of those you want to recover. Action examples are code excerpts from larger programs and must be run in context. Terminate an InstanceAdd a comment. I use the following code to terminate an aws EC2 instance. It will retain its instance-id and its internal IP address. – Marc. After you've stopped the instance, you can start it again. 6. Interrupted in any hour after the first hour. start_instances(InstanceIds=[instance_id]) Terminating an EC2 Instance . Topic #: 1. LIst the Stopped instances with the date of shutdown and terminate them, List instances by Shutdown year. I explored the AWS Docs and realized: The storage isn't added (aka attached) automatically!; If you have terminated your EC2 instance, like I had, then you need to create a new EC2 instance, then detach the storage from this newly created instance and attach it to your existing instance and then mount this to an existing mount point or to a. Amazon EC2 can create the following types of events for your instances, where the event occurs at a scheduled time: Instance stop: At the scheduled time, the instance is stopped. Take the instance out of the standby state. Run the following command on your instance to update the ec2-instance-connect package to the latest version. You switched accounts on another tab or window. Select the unused instances you want to delete. If following code sample is saved in a file named terminate_ec2. Can any one . ”. The request remains in this state until all instances are terminated. Solution 1: If a health check fails because a user manually stopped, rebooted, or terminated the instance, this is due to how Amazon EC2 Auto Scaling health checks work. Choose Instance state, Start instance. Skip directly to the demo: 0:23For more details on this topic, see the Knowledge Center article associated with this video: the navigation pane, choose Instances and select the replacement instance. Share. You can see this action in context in the following code example: Get started with instances. When one is detected, the event rule triggers a Lambda function. Amazon EC2 console. For more information, see Scheduled events for your instances in the Amazon EC2 User Guide. For more information, see. Start the instances. Terminate an InstanceThe difference is simply the caller of the function. EC2 Auto Scaling doesn’t perform health checks for instances in the standby state. You aren't charged anything while it is in the terminated state. Terminated instances remain visible after termination (for approximately one hour). If the describe-instances command output returns an AWS account ID or "amazon" (as shown in the output example above), the selected backend Amazon EC2 instance is using a public or an Elastic IP address that is reachable from the Internet. Select the desired region: In the top-right corner of the console, click on the region dropdown. Sorted by: 2. percentage – The percentage (1-100) of calls to inject the fault into. For Send notification to, type a name for the SNS topic (for example, Terminate_EC2_Instance). 4 and 5 for each idle Amazon EC2 instance that you want to stop/terminate, available within the current AWS region. xlarge), the instance must be stopped and restarted. Instance (id) print (instance. terminate() Should I check whetherData may be deleted if an account is closed and they will definitely delete data volumes (all resources) if an account is terminated. Notice, that the instance will retain its instance id after startup but will be given a different public IP address. Here Name is a string , Values is list of strings and can be more than one for a single Name, both the Name and Value are case sensitive. Once that is complete, you can replace the hosts one by one using the commands we gathered in step 1. You cannot stop EC2 instances that are part of an Auto Scaling group. After you terminate an instance, it remains visible for a short while before being deleted. Ensure that you have the necessary IAM permissions to delete the. If the instance has any data stored on instance store volumes, that data is deleted after stopping the instance. If you shutdown a machine, it default's to stop. 06 Repeat steps no. Terminating the instance will trigger a new one to launch, as each application has by default at least one instance. A schedule should be created in the same region where your EC2 instances exist. Quick Answer To remove a terminated EC2 instance in AWS, follow these steps: 1. Segera setelah status instance berubah menjadi shutting-down atau terminated, Anda berhenti menimbulkan biaya untuk hal itu. while it was in the state kept as in the us-west-2 region. In the Configure storage section, keep the default settings. With regards to retaining other state, you'll either need to. However when I modify my autoscaling rules. 4. One must opt for EBS or S3 in such cases. 1. Skip directly to the demo: 0:23For more details on this topic, see the Knowledge Center article associated with this video: the navigation pane, choose Instances and select the replacement instance. Terminate Instance. I tried creating detaching the volume of the new instance and attaching a volume created from the. 2 Answers. As part of an Amazon EC2 instance termination, the data on any instance store volumes associated with that instance is deleted. 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. IMPORTANT: All EC2 activities are performed using Amazon's EC2 engine and rely on a valid Amazon EC2 service account in order to function correctly. Now, in the popup give the confirmation by clicking on terminate. For more information about the differences between rebooting, stopping, hibernating, and terminating instances, see Instance lifecycle in the Amazon EC2 User Guide. What is the proper way to check whether the termination is successful? s = boto3. Development, QA, or Test environments are all good use cases for automating the shutdown of an EC2 Instance. This utility, which is a python script, can perform a few actions on existing EC2 instances, either start, stop, terminate or terminate_with_vols: “start” – will start the instance and wait until it’s in “running” state. terminate () Terminate one of the EC2 instances to verify the Auto-Scaling Group is working properly Output the public DNS name of the Application Load Balancer to verify you are able to reach the Apache Web. Here is a subset of the. You can cancel it in order to prevent the instance from recreating. Amazon EC2 can create the following types of events for your instances, where the event occurs at a scheduled time: Instance stop: At the scheduled time, the instance is stopped. Type 2: Run this Lambda function throughout the day to notify/stop/terminate instances after a given period of time. I just don't want to spawn the EC2's from the admin role and use the products to provision them. Volumes. Amazon Elastic Compute Cloud (Amazon EC2) provides on-demand, scalable computing capacity in the Amazon Web Services (AWS) Cloud. Then you can start it again when needed. A value of means that checking is enabled, and means that checking is disabled. 2. Replace i-1234567890abcdef0 with the actual InstanceId of the EC2 instance you wish to terminate. If it is still running then stop the instance, before you delete do not forget to backup the data from the instance. Even ec2 describe says that it has been terminated. You need double for: ids = [instance ['InstanceId'] for reservation in ec2_result ['Reservations'] for instance in reservation ['Instances']] Share. Shuts down the specified instances. Provides information for all active Amazon EC2 instances and Amazon EC2 instances terminated in the last 30 days, up to a maximum of 2,000. Step 5. Terminate an Amazon EC2 instance using an AWS SDK PDF RSS The following code examples show how to terminate an Amazon EC2 instance. Once you terminated your instances, it means you. It then terminated instances until the running count was 0. Before today I could launch and use 6 instances without any problem. Terminating instance 2 (the one with 3 ENIs). - Amazon EC2 can schedule events (such as reboot, stop, or terminate) for your instances related to hardware issues, software updates, or system maintenance. Step 4: Terminate the Instance After removing the protection, you can now terminate the instance. The instance must be healthy and reachable. In the navigation pane, select a resource type (for example, Instances ). Note: While request for termination is enqueued right away, the EC2 service may take quite some times (like hours) to actually remove the terminated instances. Terminated instances remain visible after termination (for approximately one hour). Filter Name and Values can be used to return a specific list of information from a describe instance operation. First, you’ll detach the instance from its Amazon EC2 Auto Scaling group using the “aws autoscaling detach-instances. AWS charges you only for instances that are running, and as long as you only have one running at any one time you will not be charged. Anda dapat menghapus instance Anda saat tidak lagi membutuhkannya. Search for EC2 in the search bar at the top. Select the stuck instance, choose Instance state, Terminate instance. Computer (please complete the following information):Instance Store is disk storage directly-attached to the Amazon EC2 host machine. On the Step 2: Choose an Instance Type page, open the All instance families filter drop down menu and select g4dn instances . a. Instead of doing what you're doing, fire up an on-demand instance and get it configured how you want with regards to software installs, credentials, services, etc. Amazon EC2 Auto. The instance is terminated and a new instance doesn't launch. At this stage, the instance is preparing to enter the running state. 06 On the Change termination protection configuration. 3. Delete Key Pair. There is a set of pre-defined policies – like OldestInstance, ClosestToTheHour, etc. If you want to delete the boot volume that is associated with the instance, select the Permanently delete the attached boot volume check box. Previous Generation instances are still available as On-Demand, Reserved Instances, and Spot Instance, from our APIs, CLI and EC2 Management Console interface. Volumes. Volumes. Share. When launching an Amazon EC2 instance, a boot volume is automatically attached to the instance. First, define both the ec2 and SSM boto3 clients, as we’re going to use them both: #Define ec2 and ssm clients. Action examples are code. Instances and AMIs. 3. By default, Amazon EC2 deletes all EBS volumes that were attached when the instance launched. You can use the following tools to stop, reboot, or terminate your instance through AWS: AWS. To. An account is closed 90 days after it is suspended and terminated 150 after suspension. If you need to reboot the instances in your Auto Scaling group, we recommend that you put the instances on standby first. If the instance interruption behavior is to terminate the Spot Instances, use the following command:For instances with instance store volumes as the root device, we recommend launching replacement instances on a different Dedicated Host using the most recent Amazon Machine Image, and migrating all available data to the replacement instances before the specified termination date. Termination protection and Amazon EC2. It then replaces it with a new EC2 instance that it considers "healthy". Since the initial launch, AWS has added permission support for more actions, but not every EC2 action currently allows you to. You can see this action in context in the following code example: Get started with instances. Sorted by: 119. It takes an instance ID as input. Be sure that you're in the correct Region, if not, choose the correct Region from the navigation bar at the top of the screen. You can check if a volume is attached to an instance. InstanceId' --filters "Name=tag:tagkey,Values=tagvalue" --output text) as long as the number of expected instances is not huge, the above can be used. What I would like to do, is get this same information via the Boto3 API calls. AWS EC2 Reaper overview. It stopped initializing but it is still in my list of EC2 instances. How can I delete an instance in Amazon EC2? I terminated the instance but still, it was showing in the instance list table. I configure 1 specific Instance to termination protection = true. 2. Description ¶. We recommend that you use Amazon EC2 to reboot your instance instead of running the operating system reboot command from your instance. To use EC2 correctly, you must assume that you will lose your ephemeral storage. 2 Answers. The type of instance specified by you at launch decides the host computer’s hardware for your AWS EC2 instance. This article would explain a sample script which is used for scale down a ECS cluster in a cost efficient way using AWS SDK for Python. You cannot delete the terminated instance entry yourself. Is there a way to clear. . Any attached EBS volumes will be detached and deleted. Terraform destroy does not terminate ec2 instance. Reload to refresh your session. You can check the status of the instance by running the describe-instances command again:9. There were five different commands that I wanted to run: Get the instance IDs of my four servers. It's an older and less flexible offering. While it is stopped you will be not be paying for run time, though you will pay for any EBS volumes attached to the instance. Take the instance out of the standby state. You can see this action in context in the following code example: Get started with instances. If the instance has an IPv6 address, it will keep it. Shuts down the specified instances. Then, Actions -> Cancel Request. To better understand the differences between the two volume types, see Storage options for your Amazon EC2 instances. 08 On the EC2 Instances page, click the Actions dropdown button from the dashboard top menu, select Instance State then click Terminate to remove the stopped instance from your AWS account. If you terminate your instance and another instance starts, most likely you have configured automatic scaling through a feature like EC2 Fleet or Amazon EC2 Auto Scaling. 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. You can terminate an instance using the AWS Management Console or the command line. You can see this on the AWS EC2 console by selecting the AWS EC2. There is a third ENI attached to the remaining instance, not sure why, there were several pods running on the terminated instances but not that many. Use the create-fleet (AWS CLI) command and the --generate-cli-skeleton parameter to generate an EC2 Fleet JSON file, and direct the output to a file to save it. You can find a specific service by entering the service name in the search bar. Open the AWS Elastic Beanstalk console. If you specify multiple instances and the request fails (for example, because of a single incorrect instance ID), none of the instances are terminated. resource('ec2', region_name='ap-southeast-2')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. 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. there doesn't seem to be a way to delete instances. Action examples are code excerpts from larger programs and must be run in context. For ec2 instance logs :- Select your EC2 instance go to Actions under action go to Instance settings and then select Get system logs. If you are not sure whether you will need a terminated instance later, back up the EC2 instance with NAKIVO Backup & Replication to a local backup. Amazon EC2 resources. Description ¶. Share. 1. Terminate all the unnecessary Instances or Instances are not used for a long time from the EC2 console. When prompted for confirmation, choose Delete. In the Stop Instances dialog box, review the instance details then click Yes, Stop to confirm your action. Click on “Actions” > “Instance State” > “Terminate. Using the "aws ec2 describe-instances" command, I can get information about an instance even if it is already terminated. Command-Line Interface (CLI) Equivalent. Delete Amazon EC2 terminated instance. RHEL and SUSE. Instances []. 7. On the Container Instance : id page, choose Deregister. In Amazon-ec2, the instances page shows details of a machine like its IP, size, key-pair, security group, how long it has run etc. Toggle table of contents sidebar. Note: By default, AWS Elastic Beanstalk environments use Auto Scaling groups to launch EC2 instances. If I execute a Run Command using EC2 tags as the filter, and there are terminated instances that previously matched those tags, Systems Manager attempts. there doesn't seem to be a way to delete instances. Right click the name of the resource > "open in a new tab" 6 - in the new tab you've opened, go to "Instances" > "Instances". Customize termination policy. On the navigation bar at the top of the screen, choose the same Region that you used when you created the Auto Scaling group. You can modify this instance attribute while the instance is running or stopped (in the case of Amazon EBS. When you start it again, it's migrated to a new host. 5. This is the alert that is firing: - alert: Host_Down expr: up == 0 for: 5m. The primary interface of the terminated instance is now stuck in Available state. When launching an Amazon EC2 instance, a boot volume is automatically attached to the instance. Amazon EC2 performs automated checks on every running EC2 instance to identify hardware and software issues. Unless you set the instance attribute not to delete the volume. But that didn't help me find a reason for this termination. Shuts down one or more EC2 instances. for cloudformation logs :- Select you cloudformation stack and under Events you will get all logs of cloudformation. However, you can launch additional instances using the same AMI. Remove, replace, and re-import resources to manage state and reconcile drift in your infrastructure. The script below will require instance ids. This dimension is available only for Amazon EC2 metrics when the instances are in such an Auto Scaling group. The termination_date defines a future date after which the EC2 instance will be terminated. If you specify multiple instances and the request fails (for example, because of a single incorrect instance ID), none of the instances are terminated. Sorted by: 3. To avoid being charged. For more information about EC2 instance private DNS hostnames, see Amazon EC2 instance hostname types. Terminate Your Amazon EC2 Instances in Your Auto Scaling Group: You can remove an instance from an Auto. you will be paying for the instance. EC2 Auto Scaling isn’t aware of instance terminations for instances in standby. 1. For example, if the user types python script. That is disk space that is local to the instance. Amazon EC2 Auto Scaling might terminate instances in an Auto Scaling group for the following reasons: The instance is marked as unhealthy. Any thoughts?EC2 Auto Scaling has the concept of Termination Policies to decide which instance to terminate during scale down. 1 Answer Sorted by: 18 Basically it goes like this: Your machine is gone, you cannot restart, you need to create a new instance all the data you had on an instance. Querying instance details long after it is terminated. Choose a g4dn. ec2_client = boto3. 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. When you want to get your instance running again, edit your Auto Scaling group and reset min=desired=1. Here is the official documentation snippet referring that: You cannot manually associate or disassociate a public IP address from your instance. instance-state-code - The state of the instance, as a 16-bit unsigned integer. Is there a way to clear them? This is causing a lot of clutter. To delete terminated EC2 Instances, locate the instance you want to delete in the EC2 Console under the Instances page. According to the AWS documentation the savings get applied automatically to your existing EC2 instance(s). To the Desired Instance: 2 and Min Instance: 2. The script below will require instance ids. Each email address is sent a topic subscription confirmation email. We can remove terminated instances that are still listed as healthy and in standby using one of the following methods: 1. Although this is a software watchdog timer, the fact that it is a kernel module means that any instance in which the watchdog itself becomes unresponsive would also be detected by the Instance Status. EC2 Auto Scaling isn’t aware of instance terminations for instances in standby. If a termination request originates with Amazon EMR, and the Amazon EMR and Amazon EC2 settings for an instance conflict, the Amazon EMR.