Amazon EC2 terminates, stops, or hibernates your Spot Instance when the Spot price exceeds the
maximum price for your request or capacity is no longer available. Amazon EC2 provides a
Spot Instance interruption notice, which gives the instance a two-minute warning before it is
interrupted. If Amazon ECS Spot Instance draining is enabled on the instance, ECS receives the
Spot Instance interruption notice and places the instance in DRAINING
status.
Important
Amazon ECS monitors for the Spot Instance interruption notices that have the
terminate and stop instance-actions. If you
specified either the hibernate instance interruption behavior when
requesting your Spot Instances or Spot Fleet, then Amazon ECS Spot Instance draining is not supported for
those instances.
When a container instance is set to DRAINING, Amazon ECS prevents new
tasks from being scheduled for placement on the container instance. Service tasks on
the draining container instance that are in the PENDING state are
stopped immediately. If there are container instances in the cluster that are
available, replacement service tasks are started on them.
You can turn on Spot Instance draining when you launch an instance. You must set the
ECS_ENABLE_SPOT_INSTANCE_DRAINING parameter before you start the
container agent. Replace my-cluster with the name of your
cluster.
[Environment]::SetEnvironmentVariable("ECS_ENABLE_SPOT_INSTANCE_DRAINING", "true", "Machine") # Initialize the agent Initialize-ECSAgent -Clustermy-cluster
For more information, see Launching an Amazon ECS Windows container instance.
