Class: Aws::AutoScaling::Types::LaunchTemplateOverrides
- Inherits:
-
Struct
- Object
- Struct
- Aws::AutoScaling::Types::LaunchTemplateOverrides
- Defined in:
- gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/types.rb
Overview
Use this structure to let Amazon EC2 Auto Scaling do the following when the Auto Scaling group has a mixed instances policy:
Override the instance type that is specified in the launch template.
Use multiple instance types.
Specify the instance types that you want, or define your instance requirements instead and let Amazon EC2 Auto Scaling provision the available instance types that meet your requirements. This can provide Amazon EC2 Auto Scaling with a larger selection of instance types to choose from when fulfilling Spot and On-Demand capacities. You can view which instance types are matched before you apply the instance requirements to your Auto Scaling group.
After you define your instance requirements, you don't have to keep updating these settings to get new EC2 instance types automatically. Amazon EC2 Auto Scaling uses the instance requirements of the Auto Scaling group to determine whether a new EC2 instance type can be used.
Constant Summary collapse
- SENSITIVE =
[]
Instance Attribute Summary collapse
-
#instance_requirements ⇒ Types::InstanceRequirements
The instance requirements.
-
#instance_type ⇒ String
The instance type, such as
m3.xlarge
. -
#launch_template_specification ⇒ Types::LaunchTemplateSpecification
Provides a launch template for the specified instance type or set of instance requirements.
-
#weighted_capacity ⇒ String
If you provide a list of instance types to use, you can specify the number of capacity units provided by each instance type in terms of virtual CPUs, memory, storage, throughput, or other relative performance characteristic.
Instance Attribute Details
#instance_requirements ⇒ Types::InstanceRequirements
The instance requirements. Amazon EC2 Auto Scaling uses your specified requirements to identify instance types. Then, it uses your On-Demand and Spot allocation strategies to launch instances from these instance types.
You can specify up to four separate sets of instance requirements per Auto Scaling group. This is useful for provisioning instances from different Amazon Machine Images (AMIs) in the same Auto Scaling group. To do this, create the AMIs and create a new launch template for each AMI. Then, create a compatible set of instance requirements for each launch template.
InstanceRequirements
, you can't specify
InstanceType
.
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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/types.rb', line 4519 class LaunchTemplateOverrides < Struct.new( :instance_type, :weighted_capacity, :launch_template_specification, :instance_requirements) SENSITIVE = [] include Aws::Structure end |
#instance_type ⇒ String
The instance type, such as m3.xlarge
. You must specify an instance
type that is supported in your requested Region and Availability
Zones. For more information, see Instance types in the Amazon
EC2 User Guide for Linux Instances.
You can specify up to 40 instance types per Auto Scaling group.
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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/types.rb', line 4519 class LaunchTemplateOverrides < Struct.new( :instance_type, :weighted_capacity, :launch_template_specification, :instance_requirements) SENSITIVE = [] include Aws::Structure end |
#launch_template_specification ⇒ Types::LaunchTemplateSpecification
Provides a launch template for the specified instance type or set of
instance requirements. For example, some instance types might
require a launch template with a different AMI. If not provided,
Amazon EC2 Auto Scaling uses the launch template that's specified
in the LaunchTemplate
definition. For more information, see
Specifying a different launch template for an instance type in
the Amazon EC2 Auto Scaling User Guide.
You can specify up to 20 launch templates per Auto Scaling group.
The launch templates specified in the overrides and in the
LaunchTemplate
definition count towards this limit.
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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/types.rb', line 4519 class LaunchTemplateOverrides < Struct.new( :instance_type, :weighted_capacity, :launch_template_specification, :instance_requirements) SENSITIVE = [] include Aws::Structure end |
#weighted_capacity ⇒ String
If you provide a list of instance types to use, you can specify the
number of capacity units provided by each instance type in terms of
virtual CPUs, memory, storage, throughput, or other relative
performance characteristic. When a Spot or On-Demand Instance is
launched, the capacity units count toward the desired capacity.
Amazon EC2 Auto Scaling launches instances until the desired
capacity is totally fulfilled, even if this results in an overage.
For example, if there are two units remaining to fulfill capacity,
and Amazon EC2 Auto Scaling can only launch an instance with a
WeightedCapacity
of five units, the instance is launched, and the
desired capacity is exceeded by three units. For more information,
see Configure an Auto Scaling group to use instance weights in
the Amazon EC2 Auto Scaling User Guide. Value must be in the range
of 1–999.
If you specify a value for WeightedCapacity
for one instance type,
you must specify a value for WeightedCapacity
for all of them.
Every Auto Scaling group has three size parameters
(DesiredCapacity
, MaxSize
, and MinSize
). Usually, you set
these sizes based on a specific number of instances. However, if you
configure a mixed instances policy that defines weights for the
instance types, you must specify these sizes with the same units
that you use for weighting instances.
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# File 'gems/aws-sdk-autoscaling/lib/aws-sdk-autoscaling/types.rb', line 4519 class LaunchTemplateOverrides < Struct.new( :instance_type, :weighted_capacity, :launch_template_specification, :instance_requirements) SENSITIVE = [] include Aws::Structure end |