Add a lifecycle hook to hold the instance in a wait state until your lifecycle action is complete. When a scale-in event occurs, a lifecycle hook pauses the instance before it is terminated and sends you. To signal Amazon EC2 Auto Scaling when the lifecycle action is complete, you must add the CompleteLifecycleAction API call to the script, and you must manually create an IAM role with a policy that allows Auto Scaling instances to call this API. For AWS Lambda compute platform applications, the AppSpec file is used by CodeDeploy to determine:. If you want to return instances to the warm pool instead, you can specify an instance reuse policy. Desired state of the ASG group change and new instance is being launched Download the credentials file and save it as client_secret. yml. It then pipes that output to the jq executable. The name of the lifecycle hook. Open the Functions page on the Lambda console. To make sure the script can shut down the instance, the instance running the script will need permissions to do so. I wish to call aws autoscaling complete-lifecycle-action on the EC2 instance being initialized, however I always got: Unable to locate credentials. How to run a custom command in AWS Autoscaling Lifecycle hook? I want to run some bunch of Powershell commands before the instance terminate from the autoscaling using lifecycle hook. Reload to refresh your session. Thank you for reaching out to AWS Support. After the instance is ready for you, it enters the running state. When you run the script using the --create-google-calendar-events option for the first time, a web browser will be opened asking your to login with the Google account you want to use. amazon-ec2; deployment; aws-code-deploy; codeship; or ask your own question. LifecycleHookName (string) -- [REQUIRED] The name of the lifecycle hook. A split pane opens up in the bottom part of the Auto Scaling groups page. A. You can adjust this time in the following ways: Set the heartbeat timeout for the lifecycle hook when you create the lifecycle hook. 3. Group resource, or via this one. If you are running tasks with RunTask you may want to create a ASG lifecycle hook and/or a Lambda function triggered by a EventBridge event to enumerate and stop the tasks running on the instance being terminated. Amazon EC2 Auto Scaling lifecycle hooks are powerful mechanisms providing the ability for your architecture to respond to Auto Scaling events. For more information, see the Amazon EC2 Auto Scaling User Guide and the Amazon EC2 Auto Scaling API Reference . The aws-node-termination-handler Instance Metadata Service Monitor will run a small pod on each host to perform monitoring of IMDS paths like /spot or /events and react accordingly to drain and/or cordon the. Basically the lifecycle hook is being acted upon the process for which it is configured, that is, launching or terminating. The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target. The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target. So this will run whenever a new instance launch in this auto-scaling group. If you need more time, record the lifecycle action heartbeat to keep the instance in a wait state using the RecordLifecycleActionHeartbeat API call. As to the issue you discuss, I'm pretty confident is that scripts/stop_server. Whenever a lifecycle-enabled ASG terminates a node (for example, scale-in), the terminating instance is placed into a wait state and a notification is sent on a. By default, PowerShell cmdlets run to completion and return an exit code of 0 unless an unrecoverable or terminating error occurs. Step 2: Fill in the required details and click “create volume” option. A new instance will be added to the Auto Scaling group. Create an S3 bucket where logs would be stored. After deploying with kubectl apply -f manifest. When one is detected, the event rule triggers a Lambda function. This step is a part of the procedure for adding a lifecycle hook to an Auto Scaling group: (Optional) Create a launch template or launch configuration with a user data script that runs while an instance is in a wait state due to a lifecycle hook. User data script installs packages, makes kernel configuration changes and then reboots the instance. Step 4: Add a lifecycle hook. Create an Auto Scaling lifecycle hook that publishes a message to an Amazon Simple. AWS AutoScaling lifecycle hook handler. Each Auto Scaling group can have multiple lifecycle hooks. 4. CodeDeploy doesn't report a lifecycle event. Give a friendly name for the Lifecycle Hook. The script could be used to install software, download data and configure the instance. From Amazon EC2 Auto Scaling Lifecycle Hooks - Amazon EC2 Auto Scaling: Keeping Instances in a Wait State. So this will run whenever a new instance launch in this auto-scaling group. Create an AWS Systems Manager document with a script to copy log files to Amazon S3. This will prompt the current run level that you are in. Auto Scaling lifecycle hooks. In the event of a system status check failure, you can stop and start instances with instance store volumes and then restore your instance store volume using the backed-up data. The template creates a service role that grants AWS CodeDeploy access to add deployment lifecycle event hooks to your Auto Scaling group so that it can kick off a deployment whenever Auto Scaling launches a new Amazon EC2. When the termination hook is pending, the autoscaling. Create a lifecycle hook. The Lambda function changes the ECS container instance state to. How Amazon EC2 Auto Scaling works with CodeDeploy. PDF RSS. curl -XPUT localhost:8080/shoot. Completes the lifecycle action for the specified token or instance with the specified result. When the Auto Scaling. When a run level is changed, the related scripts to that particular run level will be executed in an. Ran into this problem today, and I was able force delete using the AWS CLI. If you need more time, record the lifecycle action heartbeat to keep the instance in a wait state using the RecordLifecycleActionHeartbeat API call. If your EC2 instance was terminated without completing its lifecycle action, here are some steps you can take to troubleshoot:The deployment lifecycle event status: Pending: The deployment lifecycle event is pending. Start learning today with our digital training solutions. Lifecycle hooks allow you to control what happens when your Amazon EC2 instances are launched and terminated as you scale out and in. sh sends the CONTINUE signal to the AWS Autoscaling Group; Phase 3: Terminate EC2 Instance. . We call this script in the validate service lifecycle hook of the CodeDeploy project. I didn't get any blogs or documentation for this. Now we are going to create the Lifecycle hook. Configure CloudWatch Events to invoke the Lambda function. Specify whether the hook is used when the instances launch or terminate. Make sure to replace the relevant subnets that you intend to use in the VPCZoneIdentifier. Use Auto Scaling lifecycle hooks to put instances in a Pending:Wait state. The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target. What happens to an instance differs if you stop it or terminate it. While the hook is active, the instance will be in a Pending:Wait state. In this case, we’ll specify the resource ids of the admin subnet and security groups, which are specific to this Auto Scaling group. 0. Lifecycle Hook During Instance Termination Demo - Auto Scaling and Lifecycle Hooks course from Cloud Academy. You could invoke a script to wait for a fixed amount of time and then let the app exit. This extends the timeout period. When Amazon EC2 Auto Scaling determines that an InService instance is unhealthy, it replaces it with a new. As the instance is launched, a lifecycle hook triggers and the Auto Scaling group waits for a signal from the instance’s user data script to indicate that the application has finished installation. This lets you reuse instances that are already. The component recipe is a file that defines a component's details, dependencies, artifacts, and lifecycles. EC2 Run Command enables you to run remote scripts through the agent running within the instance. Use the user data option to run a cloud-init script after boot to attach the second network interface from a subnet with auto-assign public IP addressing enabled. Step 2: Create a Lambda function. However please note that for this to work, you must use the --force-delete argument the first time itself, if the ASG is already in a. Select Auto Scaling group and then select the lifecycle hook from the configuration panel. AWS Cloud Development Kit (AWS CDK) installed. For example, you might download and install software when an instance is launching, and archive instance log files in Amazon Simple Storage Service (S3) when an instance is terminating. The preStop hook is one of the Pod LifeCycle hooks. The instance type that you specified at launch determines the hardware of the host computer for your instance. EC2 auto scaling lifecycle hook — launch. You can identify the causes of many deployment failures by reviewing the log files created during the deployment process. Prerequisites. Click on Create. json file supports a number of built-in scripts and their preset life cycle events as well as arbitrary scripts. Create the lifecycle hook. You can run them as bash script or you can pull your scripts from aws s3. By default, an instance can continue running for one hour (heartbeat timeout) due to a termination lifecycle hook. A web browser that is supported for use with the AWS Management Console. Create an autoscale group. Another example can be to run a complex script, place them on s3 and pull them during scaling up. However, the cmdlet returns an exit code of 0 (success), and the deployment reports success. Terminate an Amazon EC2 instance using an AWS SDK. Using. Amazon EC2 Auto Scaling is designed to automatically launch and terminate EC2 instances based on user-defined scaling policies, scheduled actions, and health checks. resource "aws_autoscaling_lifecycle_hook. 8. Amazon CodeDeploy makes it easier for you to rapidly release new features, helps you avoid downtime during deployment, and handles the complexity of updating your applications. Try to lower the number of archived deployments on your instance by updating the max_revisions setting in the CodeDeploy agent configuration. My goal is to run a script on the machine that is in the process of terminating and keep it from terminating until the script is finished. Amazon EC2 Auto Scaling User Guide Amazon EC2 Auto Scaling API Reference. The range is from 30 to 7200 seconds. md","contentType":"file"},{"name":"CONTRIBUTING. Add a lifecycle hook to your AWS Auto Scaling group to move instances in the Terminating state to the Terminating:Wait state. These scripts happen in addition to the pre<event>, post<event>, and <event> scripts. JS-Data v3. Instances can remain in a wait state for a finite period of time. Description. The memory usage for your function is determined per-invoke and can be viewed in Amazon CloudWatch. The target can be either an Amazon SQS queue or an Amazon SNS topic. Option 2: Use a startup (User Data) script. To Create lifecycle hook, select the Create lifecycle hook. A lifecycle hook lets you create solutions that are aware of events in the Auto Scaling instance lifecycle, and then perform a custom action on instances when the corresponding lifecycle event occurs. This extends the timeout period. The longer the graceful period compared to the Readiness probe, the more Pods you will have Running (and Terminating). (Optional) Create a launch template or launch configuration with a user data script that runs while an instance is in a wait state due to a lifecycle hook. but I cannot see any hooks via the API. If you are not doing so already, update your script to retrieve the instance ID of the instance from the instance metadata. Step 2 – Create an IAM role for your instances and your Lambda function . Share. 2. In other words, each Pod completion is. Step 2. For Target resource tags, choose the resource tags that identify the volumes or instances to back up. Select the check box next to your Auto Scaling group. Make sure to replace the relevant subnets that you intend to use in the VPCZoneIdentifier. From the above you can see we are unable to get a response to a ping test when inside the postStart lifecycle, EKS version = 1. lifecycle. 6 Answers. These hooks let you create solutions that are aware of events in the Auto Scaling instance lifecycle, and then perform a custom action on instances when the corresponding lifecycle event occurs. On the Instance management tab, in the Lifecycle hooks section, I choose Create lifecycle hook. As with post-start hooks, you can either execute a command within the container or send an HTTP request to the application running in it. sh is not an executable. lifecycle is a nested block that can appear within a resource block. PDF RSS. To delete the lifecycle hook. Select Auto Scaling group and then select the lifecycle hook from the configuration panel. Create a Lambda function; Create an event to trigger the Lambda function using Eventbridge. Each aws:executeScript action can run up to a maximum duration of 600 seconds (10 minutes). These instances start in the Pending state. You can run them as bash script or you can pull your scripts from aws s3. Create the lifecycle hook. aws autoscaling delete-auto-scaling-group --auto-scaling-group-name <asg name> --force-delete. . Use return statements in your function to add outputs to your. Add the commit ID of the app version you want to deploy. The goal is to copy the log files to an S3 bucket. This state is known as “termination:proceed”. Next, we’ll put the lifecycle hook on the Auto Scaling group. On Ubuntu, you could set this up to happen in 55 minutes using:The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target. npm i -D uglifyjs-webpack-plugin@beta. The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target. Overview Analogous to many programming language frameworks that have component lifecycle hooks, such as Angular, Kubernetes provides Containers. C. Use EC2 Auto Scaling lifecycle hooks to run a custom script to send data to the audit system when instances are launched and terminated. Or, use the. Use chmod +x to set execute permission on. Create an Amazon CloudWatch Alarm for EC2 Instance Terminate and trigger an AWS Lambda function that executes an SSM Run Command script to collect logs, push them to Amazon S3, and complete the Successful lifecycle action once logs are collected. In this state, you can access instances before they're terminated, and then troubleshoot why they were marked as unhealthy. See AWS documentation for more information on lifecycle hook. Download the Multiple ENI Auto Scaling group Python script. 9. By default, AMIs created by the schedule are automatically tagged with the ID of the source instance. A lifecycle hook provides a specified amount of time. Collectives™ on Stack Overflow – Centralized & trusted content around the technologies you use the most. Run code before terminating an EC2 Auto Scaling instance. Hooks added via this resource will not be added until the autoscaling group has been created, and depending on your capacity. After the instance is ready for you, it enters the running state. Install with NoReboot - An Install operation with the reboot option of NoReboot using AWS-RunPatchBaseline is run on the managed node, and a compliance report is generated and uploaded. However, there is a limit on the number of hooks per Auto Scaling group. When you launch an instance, it enters the pending state. anchor anchor anchor. Deploy a new, error-free application revision to the deployment group. For example, when you stop an instance, the root device and any other devices attached to the instance persist. If you need more time, record the lifecycle action heartbeat to keep the instance in a wait state using the RecordLifecycleActionHeartbeat API call. The following is the typical workflow for using lifecycle configuration in your apps: Write the script. To check the availability of the instance types in specific Availability Zones, run the aws ec2 describe-instance-type-offerings command in the AWS CLI. When state=running, state=stopped or state=restarted then either instance_ids or. Choose Actions, Delete. The exit hook within the first step contains an arguments key where an array with a single object is passed. GwenM. Convert the script to a base64 encoded string. Ran into this problem today, and I was able force delete using the AWS CLI. This is code that executes when a scaling operation occurs. Stop the CodeDeploy host agent that's installed on the instance by running the following command: sudo service codedeploy-agent stop. In the detail object, the values for the Origin and Destination attributes show where the instance is coming from and where it's going. PDF RSS. AppSpec files on an AWS Lambda compute platform. >> aws autoscaling create-auto-scaling-group –cli-input-json file://config. A lifecycle hook specifies actions to perform when Amazon EC2 Auto Scaling launches or terminates instances. This is run as a Lambda function agaist ECS clusters backed by ASGs. Use AWS Lambda with an Amazon CloudWatch Events rule for scheduling the start/stop of backup activity. NOTE: This provider has two types of ways you can add lifecycle hooks - via the initial_lifecycle_hook attribute from the aws. When the heartbeat times out you can set the default action to ABANDON to terminate the instance and launch a new one, or set it. This step is a part of the procedure for adding a lifecycle hook to an Auto Scaling group: (Optional) Create a launch template or launch configuration with a user data script that runs while an instance is in a wait state due to a lifecycle hook. Specify whether the hook is used when the instances launch or terminate. In addition, you can use the Runtime Logs API to receive a stream of logs. For more information, checkout this AWS tutorial located here. You can add the complete-lifecycle-action command to the script. I currently use LifeCycle hooks to terminate the instance in my cloudformation. ) and when it scales in (shuts down instances) to. The bucket stores the CSV file containing an updated list of the users, extracted from the OU you specify in the AWS CloudFormation parameters. If an instance is terminated between lifecycle events or before the first lifecycle event step starts, the timeout occurs after just five minutes. Create a ‘termination’ lifecycle hook for the ASG. Amazon Elastic Container Registry (Amazon ECR) is an AWS managed container image registry service that is secure, scalable, and reliable. The Lambda functions evaluates an EC2 instance tag called gitlab-runner-parent-id, set in the runner config by the parent module's user data. To Create lifecycle hook, select the Create lifecycle hook. The Auto Scaling instance lifecycle has two primary steady states— InService and Terminated —and two side steady states— Detached and Standby . The Lambda function changes the ECS container instance state to. Create the lifecycle hook. autoscaling ¶. Create a lifecycle hook to trigger your event from the AWS Management console. For more information, see Tutorial: Use CodeDeploy to deploy an application to an Auto Scaling group. Create and associate a lifecycle configuration. I'm looking for a script to dynamically call the AWS API put-bucket-lifecycle-configuration and parse through a list of all 200+ buckets automatically so I don't need to manually change the bucket names in the command. When an instance is set to terminate, ASG triggers the hook, cloudwatch event is sen. You can see a sample here. In this step, you use the AWS console to create the AWS Identity and Access Management (IAM) role for your instances and Lambda to enable them to run the SSM agent, upload your files to your S3 bucket, and complete the lifecycle hook. Completes the lifecycle action for the specified token or instance with the specified result. The arguments available within a lifecycle block are create_before_destroy, prevent_destroy, ignore_changes, and replace_triggered_by. On the Instance management tab, in Lifecycle hooks, choose the lifecycle hook (LogAutoScalingEvent-hook). If you need more time, record the lifecycle action heartbeat to keep the instance in a wait state using the RecordLifecycleActionHeartbeat API call. cfn_scan_script: The path of the script that will be used to scan the AWS CloudFormation template for NTH (scan. (10 Running, 10 Terminating). Configure the lifecycle hook to invoke the Lambda function, which removes the entry of the private IP from the monitoring system upon instance termination. Instances launched through Auto-Scaling are normal EC2 instances, so User Data can be used to configure these instances. Each Amazon EC2 instance has a User Data field, which is accessible from the instance. Create an SSM document to run a shell script that does S3 operations inside the EC2. If you didn't add a lifecycle hook to your Auto Scaling group, Amazon EC2 Auto Scaling starts terminating the previous instances as soon as the new instances pass their health check. e root or a different IAM user. In this section, you add a lifecycle hook so that Lambda runs your function on instances at launch. First, you need to create a custom. The lifecycle hook will be invoked and the instance will remain in the “Terminating:Wait” state until hook timeouts. To learn more, visit the Amazon Data Lifecycle Manager documentation. Any increase in memory size triggers an equivalent increase in CPU available to your function. 3. To perform that you need to add the script on init level 0, which is the halt level. Specify whether the hook is used when the instances launch or terminate. The customer can use patch lifecycle hooks to run a pre-patching custom script to safely shut down the application before performing the patching process. On deploy when AMI image_id changes the instances require long graceful shutdown before terminating to finish job processing (max. 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. Here we are creating Lifecycle hook using AWS CLI, Otherwise we can’t create. json with a ^ before the version to auto install the latest releases. The default value is 3600 seconds (1 hour). AutoScalingGroupName (string) -- [REQUIRED] The name of the Auto Scaling group. Step 7: Clean up. The Lambda functions that run during any hook can perform validation tests or gather traffic metrics. This is because when the instance is terminated, the CodeDeploy agent shuts down and cannot process more scripts. Here we are creating Lifecycle hook using AWS CLI, Otherwise we can’t create. 0-eksbuild. (Optional) Create a Lambda function and a rule that allows Amazon EventBridge to invoke your Lambda function when an instance is put into a wait state due to a lifecycle hook. By design, lifecycle hooks will try to run the Lambda functions to perform actions on your instances concurrently, which will make everything happen at the same time across all instances. If you're interested in being notified that it was terminated then take look at attaching EC2. Combined, the script starts executing the notebook in the background ignoring the time limit while the rest of the script continues running. When you remove an Auto Scaling group from a deployment group or delete a deployment group, CodeDeploy does the following: As well as this no node is to be up for more than 20 days, so max instance age is set on the instances and I'm using a lifecycle hook to gracefully terminate the instance, but what I need to achieve is that when each node reaches it's 20 days it doesn't begin its lifecycle hook to terminate until its replacement node is running. You can specify one or more scripts to run in a hook. spec. When clicking the Start instance refresh button, I am presented with the following options: With the default configuration, ASG works to keep 90% of the. . To create a lifecycle hook for an Auto Scaling group, we use the put-lifecycle-hook command and provide values to the various arguments it accepts. For example, you might download and install software when an instance is launching, and archive instance log files in Amazon Simple Storage Service (S3) when an instance is terminating. The maximum time, in seconds, that can elapse before the lifecycle hook times out. To create a lifecycle hook for scale-out events, specify autoscaling:EC2_INSTANCE_LAUNCHING. You can choose to either CONTINUE or ABANDON. Deploying CodeDeploy applications to Amazon EC2 Auto Scaling groups. Start the Studio app with the specified. Related informationstopped. If you added a lifecycle hook, this extends the amount of time it takes before we start terminating the previous instances by the timeout value you specified for. Update EC2 instance IAM role To delete the lifecycle hook. ECS (Elastic Container) EFS (Elastic File System) EKS (Elastic Kubernetes) ELB (Elastic Load Balancing) ELB Classic. You signed out in another tab or window. The example provided in this post works precisely this way. You can then add a lifecycle hook to the Auto Scaling group to keep the instance running until your code sends the complete-lifecycle-action command to continue. There are also other hooks which will be. This will reboot your system$ sudo telinit 6. You can. The lifecycle hook causes a deployment to be triggered whenever a new instance is spun up by the ASG. When the script is finished installing software, it sends the complete-lifecycle-action command to continue. Lifecycle arguments help control the flow of your Terraform operations by creating custom rules for resource creation and destruction. Amazon CodeDeploy is a service that automates code deployments to any instance, including Amazon EC2 instances and instances running on-premises. In the detail object, the values for the Origin and Destination attributes show where the instance is coming from and where it's going. hooks: deployment-lifecycle-event-name: - location: script-location timeout: timeout-in-seconds runas: user-nameSelect the Auto Scaling group Instances tab; one instance state value should show the lifecycle state “Terminating:Wait”. To create a new AMI and ensure AWS EC2 backup, you should do the following: Sign in to your AWS account to open the AWS console. By default, Amazon EC2 Auto Scaling terminates your instances when your Auto Scaling group scales in. Here you can see the lifecycle hook and warm pool configurations. Step 3: Create a lifecycle hook Lambda function. I have a autoscalling in AWS, that basically do: run a python process script. That’s it. json. My idea to accomplish that is to: Use autoscaling module with an initial lifecycle hook that sets up a transition state to autoscaling:EC2_INSTANCE_TERMINATING when removing old ASG and creating. fsx) Octopus can run these scripts on almost any operating system as long as the script runtime is installed and configured correctly. When a scale down event is triggered, an instance will be chosen to be removed from auto-scaling group. For running apps, a confirmation dialog is displayed. Describes a lifecycle hook. SyntaxThe lifecycle hooks for the specified group. 5. The aws-node-termination-handler (NTH) can operate in two different modes: Instance Metadata Service (IMDS) or the Queue Processor. 30m). (string) Syntax: "string" "string". Note: If you've got the error, consider specifying the right --region. 1. when you add a lifecycle hook in the console, Amazon EC2 Auto Scaling sends lifecycle event notifications to Amazon EventBridge. Follow. Step 1: Head over to snapshots, select the snapshot you want to restore, select the “Actions” dropdown, and click create volume. This assumes you have your AWS. By default, an instance can continue running for one hour (heartbeat timeout) due to a termination lifecycle hook. 24 Sep 2018 - AWS Auto Scaling Group: Working With Lifecycle Hooks. Open the Auto Scaling groups page of the Amazon EC2 console. Selecting CodeDeploy grants the CodeDeploy the ability to call other AWS services on your behalf. Hook files can be binary files, or script files starting with a #! line containing their interpreter path, such as #!/bin/bash. The sample package I am testing here is an Apache (application. Step 4: Increase the number of Amazon EC2 instances in the Auto Scaling group. Create an AWS Lambda function to run as a lifecycle hook of the Auto Scaling group when an instance is launching. C. The deployment process varies, depending on the compute platform or deployment method (Lambda, Amazon ECS, EC2/On-Premises, or through AWS CloudFormation) that you use for your deployments. When Amazon EC2 Auto Scaling responds to a scale-out event, it launches one or more instances. You are currently running with 100 Amazon EC2 instances with an Auto Scaling Group that needs to be able to share the storage layer for the. This hook will wait 3600 seconds before abandoning the instance. Configure the lifecycle hook as illustrated in the picture below. Octopus supports the following scripting environments: PowerShell scripts (. Custom actions are performed as the instances launch or before they terminate. yaml, ssh into the java-k8s-playground container and run the following command to cause a crash by simply calling the crash API. 1,228 11 25. Then copy the code into the Function code field. D. Another approach, a temporary solution I once got it fixed by installing the beta version of that package. In the first post in this two-part blog series, we showed how to deploy an automated solution leveraging AWS Backup, AWS Step Functions, and AWS Systems Manager to run custom scripts before or after a backup. --default-result (string) The action the Auto Scaling group takes when the lifecycle hook timeout elapses or if an unexpected failure occurs. 1: (Optional) Customize a Notebook Instance . To deploy a CodeDeploy application revision to an Amazon EC2 Auto Scaling group: Create or locate an IAM instance profile that allows the Amazon EC2 Auto Scaling group to work with Amazon S3. 32 views. Jobs with fixed completion count - that is, jobs that have non null . By using EC2 Spot Instances, customers can access additional compute capacity between 70%-90% off of On-Demand Instance pricing. To complete lifecycle hook actions using an API, make a CompleteLifecycleAction call. These events give you an opportunity to run scripts (or hooks) as part of the deployment. ECR (Elastic Container Registry) ECR Public. The role allows Amazon EC2 Auto Scaling to publish lifecycle notifications to the target. AfterInstall (a hook for Lambda functions) Run Lambda functions. You can see this action in context in the following code example: Get started with instances.