**To create an EC2 Fleet that launches Spot Instances as the default purchasing model**

This example creates an EC2 Fleet using the minimum parameters required to launch a fleet: a launch template, target capacity, and default purchasing model. The launch template is identified by its launch template ID and version number. The target capacity for the fleet is 2 instances, and the default purchasing model is ``spot``, which results in the fleet launching 2 Spot Instances.

When you create an EC2 Fleet, use a JSON file to specify information about the instances to launch.

Command::

  aws ec2 create-fleet --cli-input-json file://file_name.json

Output::

  {
      "FleetId": "fleet-12a34b55-67cd-8ef9-ba9b-9208dEXAMPLE"
  }

Where file_name.json contains the following::

  {
      "LaunchTemplateConfigs": [
	  {
	      "LaunchTemplateSpecification": {
		  "LaunchTemplateId": "lt-0e8c754449b27161c",
		  "Version": "1"
	      }

	  }
      ],
      "TargetCapacitySpecification": {
	  "TotalTargetCapacity": 2,
	  "DefaultTargetCapacityType": "spot"
      }
  }


**To create an EC2 Fleet that launches On-Demand Instances as the default purchasing model**

This example creates an EC2 Fleet using the minimum parameters required to launch a fleet: a launch template, target capacity, and default purchasing model. The launch template is identified by its launch template ID and version number. The target capacity for the fleet is 2 instances, and the default purchasing model is ``on-demand``, which results in the fleet launching 2 On-Demand Instances.

When you create an EC2 Fleet, use a JSON file to specify information about the instances to launch.

Command::

  aws ec2 create-fleet --cli-input-json file://file_name.json

Output::

  {
      "FleetId": "fleet-12a34b55-67cd-8ef9-ba9b-9208dEXAMPLE"
  }

Where file_name.json contains the following::

  {
      "LaunchTemplateConfigs": [
	  {
	      "LaunchTemplateSpecification": {
		  "LaunchTemplateId": "lt-0e8c754449b27161c",
		  "Version": "1"
	      }

	  }
      ],
      "TargetCapacitySpecification": {
	  "TotalTargetCapacity": 2,
	  "DefaultTargetCapacityType": "on-demand"
      }
  }


**To create an EC2 Fleet that launches On-Demand Instances as the primary capacity**

This example creates an EC2 Fleet that specifies the total target capacity of 2 instances for the fleet, and a target capacity of 1 On-Demand Instance. The default purchasing model is ``spot``. The fleet launches 1 On-Demand Instance as specified, but needs to launch one more instance to fulfil the total target capacity. The purchasing model for the difference is calculated as ``TotalTargetCapacity`` - ``OnDemandTargetCapacity`` = ``DefaultTargetCapacityType``, which results in the fleet launching 1 Spot Instance.

When you create an EC2 Fleet, use a JSON file to specify information about the instances to launch.

Command::

  aws ec2 create-fleet --cli-input-json file://file_name.json

Output::

  {
      "FleetId": "fleet-12a34b55-67cd-8ef9-ba9b-9208dEXAMPLE"
  }

Where file_name.json contains the following::

  {
      "LaunchTemplateConfigs": [
	  {
	      "LaunchTemplateSpecification": {
		  "LaunchTemplateId": "lt-0e8c754449b27161c",
		  "Version": "1"
	      }

	  }
      ],
      "TargetCapacitySpecification": {
	  "TotalTargetCapacity": 2,
		"OnDemandTargetCapacity":1,
	  "DefaultTargetCapacityType": "spot"
      }
  }


**To create an EC2 Fleet that launches Spot Instances using the lowest-price allocation strategy**

If the allocation strategy for Spot Instances is not specified, the default allocation strategy, which is ``lowest-price``, is used. This example creates an EC2 Fleet using the ``lowest-price`` allocation strategy. The three launch specifications, which override the launch template, have different instance types but the same weighted capacity and subnet. The total target capacity is 2 instances and the default purchasing model is ``spot``. The EC2 Fleet launches 2 Spot Instances using the instance type of the launch specification with the lowest price.

When you create an EC2 Fleet, use a JSON file to specify information about the instances to launch.

Command::

  aws ec2 create-fleet --cli-input-json file://file_name.json

Output::

  {
      "FleetId": "fleet-12a34b55-67cd-8ef9-ba9b-9208dEXAMPLE"
  }

Where file_name.json contains the following::

  {
      "LaunchTemplateConfigs": [
	  {
	      "LaunchTemplateSpecification": {
		  "LaunchTemplateId": "lt-0e8c754449b27161c",
		  "Version": "1"
	      }
		  "Overrides": [
	  {
	    "InstanceType": "c4.large",
	    "WeightedCapacity": 1,
	    "SubnetId": "subnet-a4f6c5d3"
	  },
	  {
	    "InstanceType": "c3.large",
	    "WeightedCapacity": 1,
	    "SubnetId": "subnet-a4f6c5d3"
	  },
	  {
	    "InstanceType": "c5.large",
	    "WeightedCapacity": 1,
	    "SubnetId": "subnet-a4f6c5d3"
	  }
	]

	  }
      ],
      "TargetCapacitySpecification": {
	  "TotalTargetCapacity": 2,
	  "DefaultTargetCapacityType": "spot"
      }
  }
