Example Capacity Reservation Fleet configurations
Example 1: Reserve capacity based on vCPUs
The following example creates a Capacity Reservation Fleet that uses two instance types: m5.4xlarge
and m5.12xlarge.
It uses a weighting system based on the number of vCPUs provided by the specified instance types.
The total target capacity is 480 vCPUs. The m5.4xlarge provides 16 vCPUs
and gets a weight of 16, while the m5.12xlarge provides 48 vCPUs and gets
a weight of 48. This weighting system configures the Capacity Reservation Fleet to reserve capacity for
either 30 m5.4xlarge instances (480/16=30), or 10 m5.12xlarge instances
(480/48=10).
The Fleet is configured to prioritize the m5.12xlarge capacity and gets priority of
1, while the m5.4xlarge gets a lower priority of 2. This
means that the fleet will attempt to reserve the m5.12xlarge capacity first, and only
attempt to reserve the m5.4xlarge capacity if Amazon EC2 has insufficient m5.12xlarge
capacity.
The Fleet reserves the capacity for Windows instances and the reservation automatically
expires on October 31, 2021 at 23:59:59 UTC.
$aws ec2 create-capacity-reservation-fleet \ --total-target-capacity 480 \ --allocation-strategy prioritized \ --instance-match-criteria open \ --tenancy default \ --end-date 2021-10-31T23:59:59.000Z \ --instance-type-specifications file://instanceTypeSpecification.json
The following is the contents of instanceTypeSpecification.json.
[ { "InstanceType": "m5.4xlarge", "InstancePlatform":"Windows", "Weight": 16, "AvailabilityZone":"us-east-1a", "EbsOptimized": true, "Priority" : 2 }, { "InstanceType": "m5.12xlarge", "InstancePlatform":"Windows", "Weight": 48, "AvailabilityZone":"us-east-1a", "EbsOptimized": true, "Priority" : 1 } ]