The underlying hardware hosting your instance was faulty and Amazon EC2 restarted the instance to move it to new, healthy hardware. If you wish to keep the disks after. 3. The high byte is used for internal purposes and should be ignored. It shows Replica in the Role column. resource "aws_instance" "this" { ami = "ami-0dcc1e21636832c5d" instance_type = "m5. Just wanted to confirm that once a instance is terminated, there is no easy way to recover the instance apart from backups etc. To view specific AMIs, include the --image-id option and specify the IDs of the AMIs to view. rds_task_status @task_id= 16. CloudWatch reads the metadata associated with each EC2 instance to verify that it doesn’t use instance store volumes before enabling the recover action. The freshness of data depends on the time difference between instance termination and snapshot creation. It’s quite easy and you need to perform a few quick steps to delete an instance in AWS. When an instance reaches its scheduled retirement date, it is stopped or terminated by AWS. Step 4) Now login to new ec2 machine and mount the old EBS volume. Resolution Create an alarm. Use the list-images-in-recycle-bin AWS CLI command. You can then access the data. PermissionsFor 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. micro Amazon EC2 instance in your AWS Region is $0. After your instance is deleted, it remains visible on the console for a short while, and then the entry is automatically deleted. Source: AWS You can select from one of two pricing options for spot instances: Regular spot pricing —instances can be terminated with 2 minutes notice. It’s also possible to create alarms for every single EC2 instance or instances created by all the. Amazon EC2 shuts down and terminates your instance. Auto Scaling is a web service designed to launch or terminate Amazon EC2 instances automatically based on user-defined policies, schedules, and health checks. Rebooting an instance is equivalent to rebooting an operating system. For. 5. Rule: AWS Cloud: Network ACL Changes: Detects changes to the Access Control List (ACL). We answered the most commonly asked AWS interview questions to help you better understand AWS product offerings. User Guide. Can I re-create a terminated. I created a new ec2 instance and I want to have an identical environment (files, installed programs) to the previous instance when the snapshot was taken. If you want more practice, you could use the following to terminate the instances right from your IDE: import boto3. You can launch Spot Instances on spare EC2 capacity for steep discounts in exchange for returning them when Amazon EC2 needs the capacity back. But in my experience once you terminate the boot volume and the instance the data has dissolved into the ether. You can create an Amazon CloudWatch alarm that monitors an Amazon EC2 instance and automatically recovers the instance if it becomes impaired due to an underlying hardware failure or a problem that requires AWS involvement to repair. On the Cluster: name page, choose the Services tab. Note: You can't convert an auto-assigned dynamic public IP address to an Elastic IP address. Terminated instances cannot be recovered. For Instance and Device name, enter the instance ID and device name that you wrote down in Step 2, and then choose Attach volume. Select Create Snapshot. Replication servers are automatically launched and terminated as needed. To delete a key pair using the Console, follow these steps: 1. This initiates your backup job immediately and enables you to. Verify the details. 19. 63 Command Reference terminate-recovery-instances ¶ Description ¶ Initiates a Job for terminating the EC2 resources. User Guide. If you would like to suggest an improvement or fix for the AWS CLI, check out our contributing guide on GitHub. In EKS, this is done by adding the NodeRole created from the previous step into a Kubernetes ConfigMap. State. From the EC2 Dashboard, click on "Resources" on the middle pane, then click the "Snapshots" link. answered 4 months ago. User Guide. Automatic recovery improves instance availability by recovering the instance if it becomes impaired due to an underlying hardware issue. Also, you should be able to see the instance in the AWS console for a period of time, listed as terminated, and you can view the instance's system console. Include the --snapshot-id option to view a specific snapshot. Note: Unless you selected the No reboot option on the instance, performing the following procedure reboots the instance. AWS SDK for C++. This minimizes the time required to create the. Step 3: Prep workspaces and do a one-time copy. The instance type that you specified at launch determines the hardware of the host computer for your instance. 0 coins. Disable any existing transaction log backup job you might have as part of your database maintenance plan. delete the auto scaling by going to the left hand side of the EC2 dash board under AUTO SCALING > Auto Scaling Groups > select the check box Action > delete. Dedicated Hosts support different configurations (physical cores, sockets and VCPUs) which allow you to select and run instances of different families and sizes depending on your business need. For more information, see Amazon EC2 instance store. If you want to delete the boot volume that is associated with the instance, select the Permanently delete the attached boot volume check box. To get the latest data from the unreachable instance, we need to create a new rescue instance & Attach the new Volume with this instance. On the Create on-demand backup page, choose the following options:. If you would like to suggest an improvement or fix for the AWS CLI, check out our contributing guide on GitHub. Troubleshoot an unreachable instance. Select the VPC and Subnet in which you want your Instance. When you reboot an instance, it remains on the same physical host, so your instance keeps its public DNS name (IPv4), private IPv4 address, IPv6 address (if applicable), and any data on its. If your instance root device is an Amazon EBS volume, the instance is stopped, and you can start it again. Therefore we need to intercept this event via an AWS EventBridge. Submit the request again after Amazon RDS has completed the DB snapshot. Then you can start it again when needed. After the instance is ready for you, it enters the running state. Select the servers that you want to protect and click Start reversed replication. 01 per hour = $7. Click on Launch. Route53 – Delete the hosted Zone ID and A records/CNAMEs created. The serial console connects to your instance without the need for a working. If required, use the region selector in the top right corner to switch to the region where your instance was launched. This means that EC2 Mac Instances are included. As part of an Amazon EC2 instance termination, the data on any instance store volumes associated with that instance is deleted. Amazon EC2 shuts down and terminates your instance. ** Edit ** Worth noting that if you terminate the spot instance within an instance hour then you pay for the full hour, even if you only. When I ask my lost ec2 instance to online support, the explanation by the support team was "resources can be deleted by amazon during suspension period". AWS CloudFormation treats a stack as a collection of AWS resources that customers can manage as a single unit. TerminateRecoveryInstances. Can I recover it?Performing frequent drills is key for failover preparedness. terminate-recovery-instances¶ Description¶ Initiates a Job for terminating the EC2 resources associated with the specified Recovery Instances, and then will delete the Recovery Instances from the Elastic Disaster. By default, you can terminate your instance using the Amazon EC2 console, command line interface, or API. There you can use filters to select EC2 instance history, for example, and see which account was responsible for its deletion, as well as other things like volume attachment, when it was spun up, etc! Sorry if that's two years too late. When you delete an Auto Scaling group from the Amazon EC2 Auto Scaling console,. 2. Copy the data off the snapshot. The example below shows how to: botocore. If the instance was started more than 90 days ago: If you have Cloudtrail enabled and configured it to write to S3, then you can go through the Cloudtrail log and look for events related the instance id. The procedures in this documentation use the CloudWatch console. After your instance is terminated, it remains visible on the console. f. Resolution Create an alarm. To delete an instancem use the following steps. Terminating an EC2 Instance . Create a new key pair from the AWS EC2 Console. Recycle Bin is a data recovery feature that enables you to restore accidentally deleted Amazon EBS snapshots and EBS-backed AMIs. Take note that the state of your retrieved instance might be back to the date the snapshot was created. EC2 Auto Scaling helps you maintain application availability through fleet management for EC2 instances,. To view the output from your Lambda function, do the following: Open the CloudWatch console at. Note: Remember if the IAM role is not. Data replication status The Data replication status category shows the current data replication status of the recovery instance. A. You can use the new AMI to launch an instance. Click on “Instances” in the left-hand navigation menu. Termination means deletion so please be cautious and I recommend using --dry-run and --no-dry-run commands for being safe side. In the Snapshot window, locate the snapshot to recover and note the "Snapshot ID" and "Size". If the process is for any reason delayed, replication lags. A snapshot is an incremental backup, which means that we save only the blocks on the device that have changed since your most recent snapshot. Amazon EBS 스냅샷 또는 Amazon Machine Image (AMI) 백업을 사용하여 해지된 Amazon EC2 인스턴스에서 생성된. We were clueless about what was causing this. The device name for a root volume on Windows instances is /dev/sda1. I use this environment alone and I am sure that I haven't initiated shutdown by myself, so this must be EB. AWS DMS requires the retention of binary log files for change data capture. Open the console for the service that contains the resources that you want to terminate (for example, Amazon Simple Storage Service). Description ¶. This parameter is not supported for tenancy is not supported for or for T3 instances that are configured for the. If you would like to suggest an improvement or fix for the AWS CLI, check out our contributing guide on GitHub. To delete an EC2 instance using the CLI, you'll need its Instance ID. Disabled. 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. For Windows, use Windows services management console (services. Have some data saved in the instance. The rule is NON_COMPLIANT if the state of an Amazon EC2 instance has been stopped for longer than the allowed number of days, or if the amount of time cannot be determined. AWS NVMe drivers for Windows instances. Terminate the stuck instance using the terminate-instances (AWS CLI) command as follows: aws ec2 terminate-instances --instance-ids i-1234567890abcdef0 If you are unable to create an AMI from the instance as described in the previous procedure, you can set up a replacement instance as follows:13. Workloads that are critical and need Amazon EC2 instances with termination protectionThis procedure requires a stop and start of the EC2 instance. Only option would be to contact support. If you would like to suggest an improvement or fix for the AWS CLI, check out our contributing guide on GitHub. You do not restore "into" an existing RDS instance. This is slightly cheaper than the cost of active database storage, which is billed at $0. Open AWS Console. Return to 2. amazon. Quick Guide: How to Cancel Amazon AWS and Get a Full Refund. If you attempt to put a terminated instance that was on standby back in service, Amazon EC2 Auto Scaling performs a health check on the instance, determines that it is terminating and unhealthy, and. drs] terminate-recovery-instances¶ Description¶ Initiates a Job for terminating the EC2 resources associated with the specified Recovery Instances, and then will delete the Recovery Instances from the Elastic. another scaling activity launches a new instance to replace the terminated instance (Correct) Amazon EC2 Auto Scaling creates a new scaling activity for launching a new instance to replace. For procedures that use the Amazon EC2 console, see Create Alarms That Stop, Terminate, Reboot, or Recover an Instance in the Amazon EC2 User Guide for Linux Instances. The recovery instance information page shows the Instance ID at the top. You can restore a resource from the. Click the instance that you're interested in. ago. 4. Schedule type: Periodic. I tried creating detaching the volume of. The following screenshot shows one database instance already set. 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. To view specific AMIs, include the --image-id option and specify the IDs of the AMIs to view. Delete Key Pair. Note: By default, AWS Elastic Beanstalk environments use Auto Scaling groups to launch EC2. Open the Amazon EC2 console. Right-click on the instance, from the menu, choose Instance State –> Select Terminate option. Workloads that are only run in the morning and stopped at night B. The IDs of the Recovery Instances that should be terminated. Search for EC2 in the search bar at the top. You can retrieve this by running the following command: aws ec2 describe-instances. When you have many instance created in AWS and you are not using few of them from a long time, now time to clean up and you have to delete the instance from AWS. You can launch EC2 instances onto a Dedicated Host. To back up a virtual machine, its hypervisor must have the Backup gateway status ONLINE. For more information about using this API in one of the language-specific AWS SDKs, see the following: AWS Command Line Interface. You can create alarms using the CloudWatch console or the Amazon EC2 console. Skip directly to the demo: 0:25For more details see the Knowledge Center article with this video: 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. Your instance goes from the pending state to the terminated state. 1 Answer. --cli-input-json (string) Performs service operation based on the JSON string provided. since you deleted the boot volume, that instance is now in the. Recover your Amazon EC2 instance automatically by using the default configuration. Single or multiple instances at the same. The procedures in this documentation use the CloudWatch console. Skip directly to the demo: 0:25For more details see the Knowledge Center article with this video: we can proceed with the recovery. There's an Auto Scaling group scale down event. If other arguments are provided on the command line, the CLI values will override the. Please be warned that there is no way to recover the terminated instances in AWS. For more information about restoring from a snapshot, see. 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. On the EC2 console, go to Elastic Block Store/Volumes and find your C: disk volume, and Detach it. Short description. You can create an Amazon CloudWatch alarm that monitors an Amazon EC2 instance and automatically recovers the instance if it becomes impaired due to an underlying hardware failure or a problem that requires AWS involvement to repair. Data changes at the source instance stream to Read Replica using streaming replication. You can use the stop or terminate actions to help you save money when you no longer need an instance to be running. Use the list-images-in-recycle-bin AWS CLI command. Terminated instances remain visible after termination (for approximately one hour). When creating Spot Instance requests, clear the Delete check box for Amazon EBS volumes that you want to be kept if the instance is terminated. You can back up the data on your Amazon EBS volumes by making point-in-time copies, known as Amazon EBS snapshots. Create alarms that stop, terminate, reboot, or recover an instance; Automate using EventBridge; Monitor memory and disk metrics. NOTE: This process can only be used to recover files or folders from EBS data volumes. Create an RDS for MySQL database by using the AWS Management Console, AWS CLI, AWS SDK, or an AWS CloudFormation template. Disaster Recovery/Business Continuity Amazon EC2 Backup & Recovery AWS Backup AWS Elastic Disaster Recovery. This auto-healing feature is usually helpful because instance failures are detected fast, and Auto Scaling groups quickly replace the impacted instances. AWS CLI To view deleted AMIs in the Recycle Bin using the AWS CLI. Start the instance, and restore the host configuration. Host recovery states. You can create alarms using the CloudWatch console or the Amazon EC2 console. These parameters are prefilled to match the original backup. $ aws ec2 modify-instance-attribute --instance-id instance_id--no-disable-api-termination Instances automatically launched or terminated. You can create an Amazon CloudWatch alarm that monitors an Amazon EC2 instance and automatically recovers the instance if it becomes impaired due to an underlying hardware failure or a problem that requires AWS involvement to repair. When you have many instance created in AWS and you are not using few of them from a long time, now time to clean up and you have to delete the instance from AWS. For example, rebuilding an environment with an Amazon RDS database instance creates a new database with the same configuration, but does not apply a snapshot to the new database. Click on Instances from the left pane to remove the terminated EC2 instance. A snapshot is an incremental backup, which means that we save only the blocks on the device that have changed since your most recent snapshot. 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. In the navigation pane, choose Clusters. Any data on the instance store volumes persists as long as the instance is running, but this data is deleted when the instance is terminated (instance store-backed instances do not support the Stop action) or if it fails (such as if an underlying drive has issues). There are multiple preparation steps to execute when using EC2Rescue in offline mode. You learn how to restore a volume from an EBS snapshot, attach the volume to a running EC2 instance, and copy the files or folders to be recovered. 7 – EC2 instance #2: New instance. The replication agent is in running state. 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. In the navigation pane, choose Instances. Posted On: Oct 16, 2023. Mount the snapshot as a new EBS volume on the instance. For procedures that use the Amazon EC2 console, see Create Alarms That Stop, Terminate, Reboot, or Recover an Instance in the Amazon EC2 User Guide for Linux Instances. The longer the defined duration, the lower the discount provided for the spot instance. With Amazon EC2 you launch virtual server instances on the AWS cloud. For DB Instance Identifier, enter the name for the restored DB instance. Assuming the OP is free tier, they'd have more success trying to contact the dead. Resolution. It’s not possible to recover either the original Amazon EC2 instance or any volumes that were deleted as part of the termination process. 5. Theo mặc định, khi ta bắt đầu shutdown từ instance dựa trên Amazon EBS (sử dụng lệnh shutdown hoặc lệnh poweroff ), instance đó sẽ stop. Maximum number of 200 items. Attach an EBS volume from the terminated instance to another EC2 instance. Unhealthy task nodes are exempt from termination protection and will be terminated. Select machines to launch in Test Mode. For Filter, select Waiting for ELB connection draining to confirm if the group is waiting to. Option 1: Amazon RDS Snapshots. instance-state-code - The state of the instance, as a 16-bit unsigned integer. The user's data is destroyed. Select a snapshot to delete (look for the AMI ID from the prior step in the Description column). A Source server (A2) will be created in the source region, as shown in the following diagram. Terminate an instance. To delete a key pair using the Console, follow these steps: 1. To prevent your instance from being accidentally terminated using. Set the recovery behavior. The feature of replacing Root Volumes was introduced in April 2021 and has just been Feb. When an instance reaches its scheduled retirement date, it is stopped or terminated by AWS. AWS Glacier is an extremely low-cost storage service offered by Amazon that is used for data archiving and backup purposes. Both services allow you to: Reduce disaster recovery infrastructure and operational costs. Advanced logs and troubleshooting: Use the Capture logs feature in either Current instance mode or. In my case, this directory is “C:Program FilesAmazonAWSCLIV2”. Open the recovery instance details view to learn more. Choose Terminate when prompted for confirmation. Recovery of the DB instance is complete. Restoring a terminated EC2 instance on aws Adewale Adeleye · Follow 3 min read · Nov 27, 2018 -- If you have intentionally/accidentally deleted your aws. Select the EBS Volume that you want to attach to an EC2 instance. Send a diagnostic interrupt (for advanced users) For additional help with Windows instances, see Troubleshoot Windows instances in the Amazon EC2 User. exec msdb. Detach the root volume from the instance. Compute costs can be viewed in the AWS Billing and Cost. Open Amazon EC2 console at In the navigation pane, choose Elastic Block Store , Snapshots. Scheduled maintenance occurred on your instance that required a reboot. 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. AWS. Document Conventions. EBS volumes were not terminated upon instance. RDS-EVENT-0023: Emergent Snapshot Request: message. An important point to remember here is, when you a. When scaling-in, instances are terminated. In the navigation pane, under Auto Scaling, choose Auto Scaling Groups. CryptoAs per AWS Documentation:. Instance terminates immediately Description. For instructions on how to avoid this problem, see Security groups on the EC2 Instances page of this guide. You can back up the data on your Amazon EBS volumes by making point-in-time copies, known as Amazon EBS snapshots. To increase log retention on an Amazon RDS DB instance, use the following procedure. If the Amazon EBS disk volume is no longer visible in your console, then it is gone and cannot be recovered. Use the list-snapshots-in-recycle-bin AWS CLI command. Amazon EC2 Auto Scaling might terminate instances in an Auto Scaling group for the following reasons: The instance is marked as unhealthy. Select the instance in the dashboard. Click “Yes” to confirm. 4. To manage changes and attachments of an EBS block to an instance, use the aws_ebs_volume and aws_volume_attachment resources instead. With Amazon EC2 Spot Instance, you can request unused Amazon EC2 instances to reduce your compute costs. Overview. . You can terminate a Spot Instance while it is stopped. Procedure creates an SSM helper Instance/recovery Instance with the name tag AWS-Support-EC2Rescue-I-xxxx Creates an AMI for backup purpose before it runs further steps: Stops the Problematic Unreachable Instance, Detaches the Root Volume from it, and Attaches on the SSM enabled Recovery/Helper Instance:In this user guide, we describe the following ways to launch a Spot Instance using EC2: You can create a Spot Instance request by using the launch instance wizard in the Amazon EC2 console or the run-instances AWS CLI command. When launching an Amazon EC2 instance, you can specify a Delete on Termination flag that indicates whether to delete the EBS volume (s) when the instance is terminated. Finally, on the next confirmation pop-up, choose Yes to confirm the termination of the AWS instance. A manual backup has been requested but Amazon RDS is currently in the process of creating a DB snapshot. Migration. Today, AWS Elastic Disaster Recovery (AWS DRS) announces the general availability of Recover Into Existing Instance, which allows you to recover. The instance exceeded its specified keep-alive parameters. Jika instance menjadi terganggu karena kegagalan perangkat keras yang mendasarinya, instans akan dipulihkan secara otomatis. The Overview panel provides an overview of the failback process, including:1 Answer. Terminology. Amazon Elastic Block Store (EBS) is persistent disk storage. Step 2: Choose a process that meets your business needs. 3 ) Attach the new volume to the Instance. On the IAM console, delete the policies and roles you created. On the Amazon EC2 console, select the Amazon EC2 instance that you used to connect to the RDS instance and on the Actions menu, choose Terminate. Cloudformation will interpret that as you creating an entirely new instance and create it. 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. This operation is idempotent; if you terminate an instance more than once, each call succeeds. Amazon EC2 Auto Scaling might terminate instances in an Auto Scaling group for the following reasons: The instance is marked as unhealthy. But CloudWatch cannot recover terminated instances so I would think option A is suitable for this scenario. It will poll every 15 seconds until a successful state has been reached. AWS continues to bill for Elastic IP addresses associated with a stopped instance. If you need help creating a MySQL instance, follow the steps in Create and Connect to a MySQL Database with Amazon RDS. Stop the instance. 1. Click Terminate. In this video you will learn how to backup and restore an entire EC2 instance, including all EBS volumes, at once. 5. Since it is temporary storage, data doesn’t persist when the associated instance is stopped or terminated. November 17, 2021. Termination protection prevents an instance from accidental termination. For more information on Elastic Beanstalk: Product Page; Documentations; Release Notes; Platform Support List »Only if you changed the configuration after the instance was created to not delete the volume then it would have been preserved. Note: After your you terminate your instance, Amazon EC2 launches a replacement instance to match the desired capacity. Amazon EC2 checks the health of the instance by sending an address resolution protocol (ARP) request to the network interface (NIC). When you restore from an RDS snapshot, you will create a new RDS instance. You can modify the behavior of the replication servers by modifying the settings for a single source server or multiple source servers. Another alternative is to change a configuration value that forces the creation of a new instance, such as changing the subnet of the instance. An instance reboot is equivalent to an operating system reboot. By default, the root Amazon elastic block storage device is. Check that a valid default payment method is associated with your account. Skip directly to the demo: 0:25For more details see the Knowledge Center article with this video: Bin. The new instance becomes your rescue instance. Previously, you could use one of the predefined termination policies to determine which instances Auto Scaling would terminate. Share. 2. We use the Amazon Machine Image (AMI) you specified at launch to boot the instance. B. Replication servers are lightweight Amazon EC2 instances that are used to replicate data between your source servers and AWS. Terminated instances remain visible after termination (for approximately one hour). Hold on to your data. 3. You can't recover a terminated instance or terminated EBS volumes. For more information, see Force stop the instance. Suddenly on 28th Dec, one of my instance was terminated and gone. OS boot issues: Use the Restore feature in Offline instance mode. In future, you can try some alternate approach. Initiates a Job for terminating the EC2 resources associated with the specified Recovery Instances, and then will delete the Recovery Instances from the Elastic Disaster Recovery service. Amazon EBS volumes can be moved between instances. If following code sample is saved in a file named terminate_ec2. AWS Documentation Amazon EC2 User Guide for Linux Instances. Select the desired instances you want to delete by marking the associated checkboxes. Overview. Choose Delete. Note: If your instance is stuck in the stopping state, you might need to force the instance to stop. However, you can use the following methods to re-create the terminated instance: Launch a replacement EC2 instance using Amazon EBS snapshots or Amazon Machine Images (AMI) backups that were created from the terminated Amazon EC2 instance. If the instance root device is an EBS volume, the instance is stopped; if it is an instance store volume, the instance is terminated. If an instance becomes impaired because of an underlying hardware failure, the instance is automatically recovered. You can also use Amazon CLI to do this. Short description It isn't possible to restore or recover a deleted or deregistered AMI. If an instance becomes unreachable due to a. By using an Elastic IP address, you can mask the failure of an instance or software by rapidly remapping the address to another instance in your account.