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# AWS::EC2::EC2Fleet FleetLaunchTemplateConfigRequest

Specifies a launch template and overrides for an EC2 Fleet.
`FleetLaunchTemplateConfigRequest` is a property of the [AWS::EC2::EC2Fleet](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-ec2fleet.html) resource.
## Syntax

To declare this entity in your CloudFormation template, use the following syntax:
### JSON

```
{
 "[LaunchTemplateSpecification](#cfn-ec2-ec2fleet-fleetlaunchtemplateconfigrequest-launchtemplatespecification)" : {{FleetLaunchTemplateSpecificationRequest}},
 "[Overrides](#cfn-ec2-ec2fleet-fleetlaunchtemplateconfigrequest-overrides)" : {{[ FleetLaunchTemplateOverridesRequest, ... ]}}
}
```
### YAML

```
 [LaunchTemplateSpecification](#cfn-ec2-ec2fleet-fleetlaunchtemplateconfigrequest-launchtemplatespecification): {{
 FleetLaunchTemplateSpecificationRequest}}
 [Overrides](#cfn-ec2-ec2fleet-fleetlaunchtemplateconfigrequest-overrides): {{
 - FleetLaunchTemplateOverridesRequest}}
```
## Properties

`LaunchTemplateSpecification` 
The launch template to use. You must specify either the launch template ID or launch template name in the request. 
*Required*: No 
*Type*: [FleetLaunchTemplateSpecificationRequest](aws-properties-ec2-ec2fleet-fleetlaunchtemplatespecificationrequest.md) 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Overrides` 
Any parameters that you specify override the same parameters in the launch template. 
For fleets of type `request` and `maintain`, a maximum of 300 items is allowed across all launch templates. 
*Required*: No 
*Type*: Array of [FleetLaunchTemplateOverridesRequest](aws-properties-ec2-ec2fleet-fleetlaunchtemplateoverridesrequest.md) 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
## See also

+ [ FleetLaunchTemplateConfigRequest](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_FleetLaunchTemplateConfigRequest.html) in the *Amazon EC2 API Reference*</div><div class="naked_ctrl">
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