AWS autoscaling documentation change
Summary
Updated title and content to clarify Capacity Rebalancing functionality for Spot Instances
Security assessment
The changes improve clarity about how Capacity Rebalancing works with Spot Instances, but do not address any specific security vulnerabilities or introduce new security features.
Diff
diff --git a/autoscaling/ec2/userguide/ec2-auto-scaling-capacity-rebalancing.md index f5b96b6bb..9a9e322c4 100644 --- a/autoscaling/ec2/userguide/ec2-auto-scaling-capacity-rebalancing.md +++ b/autoscaling/ec2/userguide/ec2-auto-scaling-capacity-rebalancing.md @@ -7 +7 @@ OverviewCapacity Rebalancing behaviorConsiderations -# Use Capacity Rebalancing to handle Amazon EC2 Spot interruptions +# Capacity Rebalancing in Auto Scaling to replace at-risk Spot Instances @@ -9 +9 @@ OverviewCapacity Rebalancing behaviorConsiderations -You can configure Amazon EC2 Auto Scaling to monitor and automatically respond to changes that affect the availability of your Spot Instances. Capacity Rebalancing helps you maintain workload availability by proactively augmenting your fleet with a new Spot Instance before a running instance is interrupted by Amazon EC2. +Capacity Rebalancing in Auto Scaling helps you maintain your workload availability by proactively replacing Spot Instances at risk of interrruption. @@ -11 +11 @@ You can configure Amazon EC2 Auto Scaling to monitor and automatically respond t -The goal of Capacity Rebalancing is to keep processing your workload without interruption. When Spot Instances are at an elevated risk of interruption, the Amazon EC2 Spot service notifies Amazon EC2 Auto Scaling with an EC2 instance rebalance recommendation. +When Spot Instances are at an elevated risk of interruption, the Amazon EC2 Spot service sends an EC2 instance rebalance recommendation to Amazon EC2 Auto Scaling. If you enable Capacity Rebalancing, Auto Scaling attempts to proactively replace the Spot Instances in your group that have received an EC2 instance rebalance recommendation. This provides an opportunity to rebalance your workload to new Spot Instances that aren't at an elevated risk of interruption. @@ -13,3 +13 @@ The goal of Capacity Rebalancing is to keep processing your workload without int -When you enable Capacity Rebalancing for your Auto Scaling group, Amazon EC2 Auto Scaling attempts to proactively replace the Spot Instances in your group that have received a rebalance recommendation. This provides an opportunity to rebalance your workload to new Spot Instances that aren't at an elevated risk of interruption. Your workload can continue to process the work while Amazon EC2 Auto Scaling launches new Spot Instances before your existing instances are interrupted. - -When you don't use Capacity Rebalancing, Amazon EC2 Auto Scaling doesn't replace Spot Instances until after the Amazon EC2 Spot service interrupts the instances and their health check fails. Before interrupting an instance, Amazon EC2 always gives both an EC2 instance rebalance recommendation and a Spot two-minute instance interruption notice. +When you don't use Capacity Rebalancing, Auto Scaling doesn't replace Spot Instances until after the Amazon EC2 Spot service interrupts the instances and their health check fails. Before interrupting an instance, Amazon EC2 always gives both an EC2 instance rebalance recommendation and a Spot two-minute instance interruption notice. @@ -25 +23 @@ When you don't use Capacity Rebalancing, Amazon EC2 Auto Scaling doesn't replace - * [Enable Capacity Rebalancing using the AWS Management Console or AWS CLI](./enable-capacity-rebalancing-console-cli.html) + * [Enable Capacity Rebalancing to proactively replace at-risk Spot Instances](./enable-capacity-rebalancing-console-cli.html)