This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).
# AWS::EC2::EC2Fleet FleetLaunchTemplateOverridesRequest
Specifies overrides for a launch template for an EC2 Fleet.
`FleetLaunchTemplateOverridesRequest` is a property of the [FleetLaunchTemplateConfigRequest](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-ec2fleet-fleetlaunchtemplateconfigrequest.html) property type.
## Syntax
To declare this entity in your CloudFormation template, use the following syntax:
### JSON
```
{
"[AvailabilityZone](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-availabilityzone)" : String,
"[AvailabilityZoneId](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-availabilityzoneid)" : String,
"[BlockDeviceMappings](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-blockdevicemappings)" : [ BlockDeviceMapping, ... ],
"[InstanceRequirements](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-instancerequirements)" : InstanceRequirementsRequest,
"[InstanceType](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-instancetype)" : String,
"[MaxPrice](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-maxprice)" : String,
"[Placement](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-placement)" : Placement,
"[Priority](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-priority)" : Number,
"[SubnetId](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-subnetid)" : String,
"[WeightedCapacity](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-weightedcapacity)" : Number
}
```
### YAML
```
[AvailabilityZone](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-availabilityzone): String
[AvailabilityZoneId](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-availabilityzoneid): String
[BlockDeviceMappings](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-blockdevicemappings):
- BlockDeviceMapping
[InstanceRequirements](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-instancerequirements):
InstanceRequirementsRequest
[InstanceType](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-instancetype): String
[MaxPrice](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-maxprice): String
[Placement](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-placement):
Placement
[Priority](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-priority): Number
[SubnetId](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-subnetid): String
[WeightedCapacity](#cfn-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest-weightedcapacity): Number
```
## Properties
`AvailabilityZone`
The Availability Zone in which to launch the instances. For example, `us-east-2a`.
Either `AvailabilityZone` or `AvailabilityZoneId` must be specified in the request, but not both.
*Required*: No
*Type*: String
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`AvailabilityZoneId`
The ID of the Availability Zone in which to launch the instances. For example, `use2-az1`.
Either `AvailabilityZone` or `AvailabilityZoneId` must be specified in the request, but not both.
*Required*: No
*Type*: String
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`BlockDeviceMappings`
The block device mappings, which define the EBS volumes and instance store volumes to attach to the instance at launch.
Supported only for fleets of type `instant`.
For more information, see [Block device mappings for volumes on Amazon EC2 instances](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/block-device-mapping-concepts.html) in the *Amazon EC2 User Guide*.
*Required*: No
*Type*: Array of [BlockDeviceMapping](aws-properties-ec2-ec2fleet-blockdevicemapping.md)
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`InstanceRequirements`
The attributes for the instance types. When you specify instance attributes, Amazon EC2 will identify instance types with those attributes.
If you specify `InstanceRequirements`, you can't specify `InstanceType`.
*Required*: No
*Type*: [InstanceRequirementsRequest](aws-properties-ec2-ec2fleet-instancerequirementsrequest.md)
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`InstanceType`
The instance type.
`mac1.metal` is not supported as a launch template override.
If you specify `InstanceType`, you can't specify `InstanceRequirements`.
*Required*: No
*Type*: String
*Allowed values*: `a1.medium | a1.large | a1.xlarge | a1.2xlarge | a1.4xlarge | a1.metal | c1.medium | c1.xlarge | c3.large | c3.xlarge | c3.2xlarge | c3.4xlarge | c3.8xlarge | c4.large | c4.xlarge | c4.2xlarge | c4.4xlarge | c4.8xlarge | c5.large | c5.xlarge | c5.2xlarge | c5.4xlarge | c5.9xlarge | c5.12xlarge | c5.18xlarge | c5.24xlarge | c5.metal | c5a.large | c5a.xlarge | c5a.2xlarge | c5a.4xlarge | c5a.8xlarge | c5a.12xlarge | c5a.16xlarge | c5a.24xlarge | c5ad.large | c5ad.xlarge | c5ad.2xlarge | c5ad.4xlarge | c5ad.8xlarge | c5ad.12xlarge | c5ad.16xlarge | c5ad.24xlarge | c5d.large | c5d.xlarge | c5d.2xlarge | c5d.4xlarge | c5d.9xlarge | c5d.12xlarge | c5d.18xlarge | c5d.24xlarge | c5d.metal | c5n.large | c5n.xlarge | c5n.2xlarge | c5n.4xlarge | c5n.9xlarge | c5n.18xlarge | c5n.metal | c6g.medium | c6g.large | c6g.xlarge | c6g.2xlarge | c6g.4xlarge | c6g.8xlarge | c6g.12xlarge | c6g.16xlarge | c6g.metal | c6gd.medium | c6gd.large | c6gd.xlarge | c6gd.2xlarge | c6gd.4xlarge | c6gd.8xlarge | c6gd.12xlarge | c6gd.16xlarge | c6gd.metal | c6gn.medium | c6gn.large | c6gn.xlarge | c6gn.2xlarge | c6gn.4xlarge | c6gn.8xlarge | c6gn.12xlarge | c6gn.16xlarge | c6i.large | c6i.xlarge | c6i.2xlarge | c6i.4xlarge | c6i.8xlarge | c6i.12xlarge | c6i.16xlarge | c6i.24xlarge | c6i.32xlarge | c6i.metal | cc1.4xlarge | cc2.8xlarge | cg1.4xlarge | cr1.8xlarge | d2.xlarge | d2.2xlarge | d2.4xlarge | d2.8xlarge | d3.xlarge | d3.2xlarge | d3.4xlarge | d3.8xlarge | d3en.xlarge | d3en.2xlarge | d3en.4xlarge | d3en.6xlarge | d3en.8xlarge | d3en.12xlarge | dl1.24xlarge | f1.2xlarge | f1.4xlarge | f1.16xlarge | g2.2xlarge | g2.8xlarge | g3.4xlarge | g3.8xlarge | g3.16xlarge | g3s.xlarge | g4ad.xlarge | g4ad.2xlarge | g4ad.4xlarge | g4ad.8xlarge | g4ad.16xlarge | g4dn.xlarge | g4dn.2xlarge | g4dn.4xlarge | g4dn.8xlarge | g4dn.12xlarge | g4dn.16xlarge | g4dn.metal | g5.xlarge | g5.2xlarge | g5.4xlarge | g5.8xlarge | g5.12xlarge | g5.16xlarge | g5.24xlarge | g5.48xlarge | g5g.xlarge | g5g.2xlarge | g5g.4xlarge | g5g.8xlarge | g5g.16xlarge | g5g.metal | hi1.4xlarge | hpc6a.48xlarge | hs1.8xlarge | h1.2xlarge | h1.4xlarge | h1.8xlarge | h1.16xlarge | i2.xlarge | i2.2xlarge | i2.4xlarge | i2.8xlarge | i3.large | i3.xlarge | i3.2xlarge | i3.4xlarge | i3.8xlarge | i3.16xlarge | i3.metal | i3en.large | i3en.xlarge | i3en.2xlarge | i3en.3xlarge | i3en.6xlarge | i3en.12xlarge | i3en.24xlarge | i3en.metal | im4gn.large | im4gn.xlarge | im4gn.2xlarge | im4gn.4xlarge | im4gn.8xlarge | im4gn.16xlarge | inf1.xlarge | inf1.2xlarge | inf1.6xlarge | inf1.24xlarge | is4gen.medium | is4gen.large | is4gen.xlarge | is4gen.2xlarge | is4gen.4xlarge | is4gen.8xlarge | m1.small | m1.medium | m1.large | m1.xlarge | m2.xlarge | m2.2xlarge | m2.4xlarge | m3.medium | m3.large | m3.xlarge | m3.2xlarge | m4.large | m4.xlarge | m4.2xlarge | m4.4xlarge | m4.10xlarge | m4.16xlarge | m5.large | m5.xlarge | m5.2xlarge | m5.4xlarge | m5.8xlarge | m5.12xlarge | m5.16xlarge | m5.24xlarge | m5.metal | m5a.large | m5a.xlarge | m5a.2xlarge | m5a.4xlarge | m5a.8xlarge | m5a.12xlarge | m5a.16xlarge | m5a.24xlarge | m5ad.large | m5ad.xlarge | m5ad.2xlarge | m5ad.4xlarge | m5ad.8xlarge | m5ad.12xlarge | m5ad.16xlarge | m5ad.24xlarge | m5d.large | m5d.xlarge | m5d.2xlarge | m5d.4xlarge | m5d.8xlarge | m5d.12xlarge | m5d.16xlarge | m5d.24xlarge | m5d.metal | m5dn.large | m5dn.xlarge | m5dn.2xlarge | m5dn.4xlarge | m5dn.8xlarge | m5dn.12xlarge | m5dn.16xlarge | m5dn.24xlarge | m5dn.metal | m5n.large | m5n.xlarge | m5n.2xlarge | m5n.4xlarge | m5n.8xlarge | m5n.12xlarge | m5n.16xlarge | m5n.24xlarge | m5n.metal | m5zn.large | m5zn.xlarge | m5zn.2xlarge | m5zn.3xlarge | m5zn.6xlarge | m5zn.12xlarge | m5zn.metal | m6a.large | m6a.xlarge | m6a.2xlarge | m6a.4xlarge | m6a.8xlarge | m6a.12xlarge | m6a.16xlarge | m6a.24xlarge | m6a.32xlarge | m6a.48xlarge | m6g.metal | m6g.medium | m6g.large | m6g.xlarge | m6g.2xlarge | m6g.4xlarge | m6g.8xlarge | m6g.12xlarge | m6g.16xlarge | m6gd.metal | m6gd.medium | m6gd.large | m6gd.xlarge | m6gd.2xlarge | m6gd.4xlarge | m6gd.8xlarge | m6gd.12xlarge | m6gd.16xlarge | m6i.large | m6i.xlarge | m6i.2xlarge | m6i.4xlarge | m6i.8xlarge | m6i.12xlarge | m6i.16xlarge | m6i.24xlarge | m6i.32xlarge | m6i.metal | mac1.metal | p2.xlarge | p2.8xlarge | p2.16xlarge | p3.2xlarge | p3.8xlarge | p3.16xlarge | p3dn.24xlarge | p4d.24xlarge | r3.large | r3.xlarge | r3.2xlarge | r3.4xlarge | r3.8xlarge | r4.large | r4.xlarge | r4.2xlarge | r4.4xlarge | r4.8xlarge | r4.16xlarge | r5.large | r5.xlarge | r5.2xlarge | r5.4xlarge | r5.8xlarge | r5.12xlarge | r5.16xlarge | r5.24xlarge | r5.metal | r5a.large | r5a.xlarge | r5a.2xlarge | r5a.4xlarge | r5a.8xlarge | r5a.12xlarge | r5a.16xlarge | r5a.24xlarge | r5ad.large | r5ad.xlarge | r5ad.2xlarge | r5ad.4xlarge | r5ad.8xlarge | r5ad.12xlarge | r5ad.16xlarge | r5ad.24xlarge | r5b.large | r5b.xlarge | r5b.2xlarge | r5b.4xlarge | r5b.8xlarge | r5b.12xlarge | r5b.16xlarge | r5b.24xlarge | r5b.metal | r5d.large | r5d.xlarge | r5d.2xlarge | r5d.4xlarge | r5d.8xlarge | r5d.12xlarge | r5d.16xlarge | r5d.24xlarge | r5d.metal | r5dn.large | r5dn.xlarge | r5dn.2xlarge | r5dn.4xlarge | r5dn.8xlarge | r5dn.12xlarge | r5dn.16xlarge | r5dn.24xlarge | r5dn.metal | r5n.large | r5n.xlarge | r5n.2xlarge | r5n.4xlarge | r5n.8xlarge | r5n.12xlarge | r5n.16xlarge | r5n.24xlarge | r5n.metal | r6g.medium | r6g.large | r6g.xlarge | r6g.2xlarge | r6g.4xlarge | r6g.8xlarge | r6g.12xlarge | r6g.16xlarge | r6g.metal | r6gd.medium | r6gd.large | r6gd.xlarge | r6gd.2xlarge | r6gd.4xlarge | r6gd.8xlarge | r6gd.12xlarge | r6gd.16xlarge | r6gd.metal | r6i.large | r6i.xlarge | r6i.2xlarge | r6i.4xlarge | r6i.8xlarge | r6i.12xlarge | r6i.16xlarge | r6i.24xlarge | r6i.32xlarge | r6i.metal | t1.micro | t2.nano | t2.micro | t2.small | t2.medium | t2.large | t2.xlarge | t2.2xlarge | t3.nano | t3.micro | t3.small | t3.medium | t3.large | t3.xlarge | t3.2xlarge | t3a.nano | t3a.micro | t3a.small | t3a.medium | t3a.large | t3a.xlarge | t3a.2xlarge | t4g.nano | t4g.micro | t4g.small | t4g.medium | t4g.large | t4g.xlarge | t4g.2xlarge | u-6tb1.56xlarge | u-6tb1.112xlarge | u-9tb1.112xlarge | u-12tb1.112xlarge | u-6tb1.metal | u-9tb1.metal | u-12tb1.metal | u-18tb1.metal | u-24tb1.metal | vt1.3xlarge | vt1.6xlarge | vt1.24xlarge | x1.16xlarge | x1.32xlarge | x1e.xlarge | x1e.2xlarge | x1e.4xlarge | x1e.8xlarge | x1e.16xlarge | x1e.32xlarge | x2iezn.2xlarge | x2iezn.4xlarge | x2iezn.6xlarge | x2iezn.8xlarge | x2iezn.12xlarge | x2iezn.metal | x2gd.medium | x2gd.large | x2gd.xlarge | x2gd.2xlarge | x2gd.4xlarge | x2gd.8xlarge | x2gd.12xlarge | x2gd.16xlarge | x2gd.metal | z1d.large | z1d.xlarge | z1d.2xlarge | z1d.3xlarge | z1d.6xlarge | z1d.12xlarge | z1d.metal | x2idn.16xlarge | x2idn.24xlarge | x2idn.32xlarge | x2iedn.xlarge | x2iedn.2xlarge | x2iedn.4xlarge | x2iedn.8xlarge | x2iedn.16xlarge | x2iedn.24xlarge | x2iedn.32xlarge | c6a.large | c6a.xlarge | c6a.2xlarge | c6a.4xlarge | c6a.8xlarge | c6a.12xlarge | c6a.16xlarge | c6a.24xlarge | c6a.32xlarge | c6a.48xlarge | c6a.metal | m6a.metal | i4i.large | i4i.xlarge | i4i.2xlarge | i4i.4xlarge | i4i.8xlarge | i4i.16xlarge | i4i.32xlarge | i4i.metal | x2idn.metal | x2iedn.metal | c7g.medium | c7g.large | c7g.xlarge | c7g.2xlarge | c7g.4xlarge | c7g.8xlarge | c7g.12xlarge | c7g.16xlarge | mac2.metal | c6id.large | c6id.xlarge | c6id.2xlarge | c6id.4xlarge | c6id.8xlarge | c6id.12xlarge | c6id.16xlarge | c6id.24xlarge | c6id.32xlarge | c6id.metal | m6id.large | m6id.xlarge | m6id.2xlarge | m6id.4xlarge | m6id.8xlarge | m6id.12xlarge | m6id.16xlarge | m6id.24xlarge | m6id.32xlarge | m6id.metal | r6id.large | r6id.xlarge | r6id.2xlarge | r6id.4xlarge | r6id.8xlarge | r6id.12xlarge | r6id.16xlarge | r6id.24xlarge | r6id.32xlarge | r6id.metal | r6a.large | r6a.xlarge | r6a.2xlarge | r6a.4xlarge | r6a.8xlarge | r6a.12xlarge | r6a.16xlarge | r6a.24xlarge | r6a.32xlarge | r6a.48xlarge | r6a.metal | p4de.24xlarge | u-3tb1.56xlarge | u-18tb1.112xlarge | u-24tb1.112xlarge | trn1.2xlarge | trn1.32xlarge | hpc6id.32xlarge | c6in.large | c6in.xlarge | c6in.2xlarge | c6in.4xlarge | c6in.8xlarge | c6in.12xlarge | c6in.16xlarge | c6in.24xlarge | c6in.32xlarge | m6in.large | m6in.xlarge | m6in.2xlarge | m6in.4xlarge | m6in.8xlarge | m6in.12xlarge | m6in.16xlarge | m6in.24xlarge | m6in.32xlarge | m6idn.large | m6idn.xlarge | m6idn.2xlarge | m6idn.4xlarge | m6idn.8xlarge | m6idn.12xlarge | m6idn.16xlarge | m6idn.24xlarge | m6idn.32xlarge | r6in.large | r6in.xlarge | r6in.2xlarge | r6in.4xlarge | r6in.8xlarge | r6in.12xlarge | r6in.16xlarge | r6in.24xlarge | r6in.32xlarge | r6idn.large | r6idn.xlarge | r6idn.2xlarge | r6idn.4xlarge | r6idn.8xlarge | r6idn.12xlarge | r6idn.16xlarge | r6idn.24xlarge | r6idn.32xlarge | c7g.metal | m7g.medium | m7g.large | m7g.xlarge | m7g.2xlarge | m7g.4xlarge | m7g.8xlarge | m7g.12xlarge | m7g.16xlarge | m7g.metal | r7g.medium | r7g.large | r7g.xlarge | r7g.2xlarge | r7g.4xlarge | r7g.8xlarge | r7g.12xlarge | r7g.16xlarge | r7g.metal | c6in.metal | m6in.metal | m6idn.metal | r6in.metal | r6idn.metal | inf2.xlarge | inf2.8xlarge | inf2.24xlarge | inf2.48xlarge | trn1n.32xlarge | i4g.large | i4g.xlarge | i4g.2xlarge | i4g.4xlarge | i4g.8xlarge | i4g.16xlarge | hpc7g.4xlarge | hpc7g.8xlarge | hpc7g.16xlarge | c7gn.medium | c7gn.large | c7gn.xlarge | c7gn.2xlarge | c7gn.4xlarge | c7gn.8xlarge | c7gn.12xlarge | c7gn.16xlarge | p5.48xlarge | m7i.large | m7i.xlarge | m7i.2xlarge | m7i.4xlarge | m7i.8xlarge | m7i.12xlarge | m7i.16xlarge | m7i.24xlarge | m7i.48xlarge | m7i-flex.large | m7i-flex.xlarge | m7i-flex.2xlarge | m7i-flex.4xlarge | m7i-flex.8xlarge | m7a.medium | m7a.large | m7a.xlarge | m7a.2xlarge | m7a.4xlarge | m7a.8xlarge | m7a.12xlarge | m7a.16xlarge | m7a.24xlarge | m7a.32xlarge | m7a.48xlarge | m7a.metal-48xl | hpc7a.12xlarge | hpc7a.24xlarge | hpc7a.48xlarge | hpc7a.96xlarge | c7gd.medium | c7gd.large | c7gd.xlarge | c7gd.2xlarge | c7gd.4xlarge | c7gd.8xlarge | c7gd.12xlarge | c7gd.16xlarge | m7gd.medium | m7gd.large | m7gd.xlarge | m7gd.2xlarge | m7gd.4xlarge | m7gd.8xlarge | m7gd.12xlarge | m7gd.16xlarge | r7gd.medium | r7gd.large | r7gd.xlarge | r7gd.2xlarge | r7gd.4xlarge | r7gd.8xlarge | r7gd.12xlarge | r7gd.16xlarge | r7a.medium | r7a.large | r7a.xlarge | r7a.2xlarge | r7a.4xlarge | r7a.8xlarge | r7a.12xlarge | r7a.16xlarge | r7a.24xlarge | r7a.32xlarge | r7a.48xlarge | c7i.large | c7i.xlarge | c7i.2xlarge | c7i.4xlarge | c7i.8xlarge | c7i.12xlarge | c7i.16xlarge | c7i.24xlarge | c7i.48xlarge | mac2-m2pro.metal | r7iz.large | r7iz.xlarge | r7iz.2xlarge | r7iz.4xlarge | r7iz.8xlarge | r7iz.12xlarge | r7iz.16xlarge | r7iz.32xlarge | c7a.medium | c7a.large | c7a.xlarge | c7a.2xlarge | c7a.4xlarge | c7a.8xlarge | c7a.12xlarge | c7a.16xlarge | c7a.24xlarge | c7a.32xlarge | c7a.48xlarge | c7a.metal-48xl | r7a.metal-48xl | r7i.large | r7i.xlarge | r7i.2xlarge | r7i.4xlarge | r7i.8xlarge | r7i.12xlarge | r7i.16xlarge | r7i.24xlarge | r7i.48xlarge | dl2q.24xlarge | mac2-m2.metal | i4i.12xlarge | i4i.24xlarge | c7i.metal-24xl | c7i.metal-48xl | m7i.metal-24xl | m7i.metal-48xl | r7i.metal-24xl | r7i.metal-48xl | r7iz.metal-16xl | r7iz.metal-32xl | c7gd.metal | m7gd.metal | r7gd.metal | g6.xlarge | g6.2xlarge | g6.4xlarge | g6.8xlarge | g6.12xlarge | g6.16xlarge | g6.24xlarge | g6.48xlarge | gr6.4xlarge | gr6.8xlarge | c7i-flex.large | c7i-flex.xlarge | c7i-flex.2xlarge | c7i-flex.4xlarge | c7i-flex.8xlarge | u7i-12tb.224xlarge | u7in-16tb.224xlarge | u7in-24tb.224xlarge | u7in-32tb.224xlarge | u7ib-12tb.224xlarge | c7gn.metal | r8g.medium | r8g.large | r8g.xlarge | r8g.2xlarge | r8g.4xlarge | r8g.8xlarge | r8g.12xlarge | r8g.16xlarge | r8g.24xlarge | r8g.48xlarge | r8g.metal-24xl | r8g.metal-48xl | mac2-m1ultra.metal | g6e.xlarge | g6e.2xlarge | g6e.4xlarge | g6e.8xlarge | g6e.12xlarge | g6e.16xlarge | g6e.24xlarge | g6e.48xlarge | c8g.medium | c8g.large | c8g.xlarge | c8g.2xlarge | c8g.4xlarge | c8g.8xlarge | c8g.12xlarge | c8g.16xlarge | c8g.24xlarge | c8g.48xlarge | c8g.metal-24xl | c8g.metal-48xl | m8g.medium | m8g.large | m8g.xlarge | m8g.2xlarge | m8g.4xlarge | m8g.8xlarge | m8g.12xlarge | m8g.16xlarge | m8g.24xlarge | m8g.48xlarge | m8g.metal-24xl | m8g.metal-48xl | x8g.medium | x8g.large | x8g.xlarge | x8g.2xlarge | x8g.4xlarge | x8g.8xlarge | x8g.12xlarge | x8g.16xlarge | x8g.24xlarge | x8g.48xlarge | x8g.metal-24xl | x8g.metal-48xl | i7ie.large | i7ie.xlarge | i7ie.2xlarge | i7ie.3xlarge | i7ie.6xlarge | i7ie.12xlarge | i7ie.18xlarge | i7ie.24xlarge | i7ie.48xlarge | i8g.large | i8g.xlarge | i8g.2xlarge | i8g.4xlarge | i8g.8xlarge | i8g.12xlarge | i8g.16xlarge | i8g.24xlarge | i8g.metal-24xl | u7i-6tb.112xlarge | u7i-8tb.112xlarge | u7inh-32tb.480xlarge | p5e.48xlarge | p5en.48xlarge | f2.12xlarge | f2.48xlarge | trn2.48xlarge | c7i-flex.12xlarge | c7i-flex.16xlarge | m7i-flex.12xlarge | m7i-flex.16xlarge | i7ie.metal-24xl | i7ie.metal-48xl | i8g.48xlarge | c8gd.medium | c8gd.large | c8gd.xlarge | c8gd.2xlarge | c8gd.4xlarge | c8gd.8xlarge | c8gd.12xlarge | c8gd.16xlarge | c8gd.24xlarge | c8gd.48xlarge | c8gd.metal-24xl | c8gd.metal-48xl | i7i.large | i7i.xlarge | i7i.2xlarge | i7i.4xlarge | i7i.8xlarge | i7i.12xlarge | i7i.16xlarge | i7i.24xlarge | i7i.48xlarge | i7i.metal-24xl | i7i.metal-48xl | p6-b200.48xlarge | m8gd.medium | m8gd.large | m8gd.xlarge | m8gd.2xlarge | m8gd.4xlarge | m8gd.8xlarge | m8gd.12xlarge | m8gd.16xlarge | m8gd.24xlarge | m8gd.48xlarge | m8gd.metal-24xl | m8gd.metal-48xl | r8gd.medium | r8gd.large | r8gd.xlarge | r8gd.2xlarge | r8gd.4xlarge | r8gd.8xlarge | r8gd.12xlarge | r8gd.16xlarge | r8gd.24xlarge | r8gd.48xlarge | r8gd.metal-24xl | r8gd.metal-48xl | c8gn.medium | c8gn.large | c8gn.xlarge | c8gn.2xlarge | c8gn.4xlarge | c8gn.8xlarge | c8gn.12xlarge | c8gn.16xlarge | c8gn.24xlarge | c8gn.48xlarge | c8gn.metal-24xl | c8gn.metal-48xl | f2.6xlarge | p6e-gb200.36xlarge | g6f.large | g6f.xlarge | g6f.2xlarge | g6f.4xlarge | gr6f.4xlarge | p5.4xlarge | r8i.large | r8i.xlarge | r8i.2xlarge | r8i.4xlarge | r8i.8xlarge | r8i.12xlarge | r8i.16xlarge | r8i.24xlarge | r8i.32xlarge | r8i.48xlarge | r8i.96xlarge | r8i.metal-48xl | r8i.metal-96xl | r8i-flex.large | r8i-flex.xlarge | r8i-flex.2xlarge | r8i-flex.4xlarge | r8i-flex.8xlarge | r8i-flex.12xlarge | r8i-flex.16xlarge`
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`MaxPrice`
The maximum price per unit hour that you are willing to pay for a Spot Instance. We do not recommend using this parameter because it can lead to increased interruptions. If you do not specify this parameter, you will pay the current Spot price.
If you specify a maximum price, your instances will be interrupted more frequently than if you do not specify this parameter.
If you specify a maximum price, it must be more than USD \$10.001. Specifying a value below USD \$10.001 will result in an `InvalidParameterValue` error message.
*Required*: No
*Type*: String
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Placement`
The location where the instance launched, if applicable.
*Required*: No
*Type*: [Placement](aws-properties-ec2-ec2fleet-placement.md)
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Priority`
The priority for the launch template override. The highest priority is launched first.
If the On-Demand `AllocationStrategy` is set to `prioritized`, EC2 Fleet uses priority to determine which launch template override to use first in fulfilling On-Demand capacity.
If the Spot `AllocationStrategy` is set to `capacity-optimized-prioritized`, EC2 Fleet uses priority on a best-effort basis to determine which launch template override to use in fulfilling Spot capacity, but optimizes for capacity first.
Valid values are whole numbers starting at `0`. The lower the number, the higher the priority. If no number is set, the launch template override has the lowest priority. You can set the same priority for different launch template overrides.
*Required*: No
*Type*: Number
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`SubnetId`
The IDs of the subnets in which to launch the instances. Separate multiple subnet IDs using commas (for example, `subnet-1234abcdeexample1, subnet-0987cdef6example2`). A request of type `instant` can have only one subnet ID.
*Required*: No
*Type*: String
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`WeightedCapacity`
The number of units provided by the specified instance type. These are the same units that you chose to set the target capacity in terms of instances, or a performance characteristic such as vCPUs, memory, or I/O.
If the target capacity divided by this value is not a whole number, Amazon EC2 rounds the number of instances to the next whole number. If this value is not specified, the default is 1.
When specifying weights, the price used in the `lowest-price` and `price-capacity-optimized` allocation strategies is per *unit* hour (where the instance price is divided by the specified weight). However, if all the specified weights are above the requested `TargetCapacity`, resulting in only 1 instance being launched, the price used is per *instance* hour.
*Required*: No
*Type*: Number
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
## See also
+ [ FleetLaunchTemplateOverridesRequest](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_FleetLaunchTemplateOverridesRequest.html) in the *Amazon EC2 API Reference*