Request Syntax Request Parameters Response Syntax Response Elements Errors Examples See Also

DescribeEC2InstanceLimits

Retrieves the instance limits and current utilization for an Amazon Region or location. Instance limits control the number of instances, per instance type, per location, that your Amazon account can use. Learn more at Amazon EC2 Instance Types. The information returned includes the maximum number of instances allowed and your account's current usage across all fleets. This information can affect your ability to scale your GameLift fleets. You can request a limit increase for your account by using the Service limits page in the GameLift console.

Instance limits differ based on whether the instances are deployed in a fleet's home Region or in a remote location. For remote locations, limits also differ based on the combination of home Region and remote location. All requests must specify an Amazon Region (either explicitly or as your default settings). To get the limit for a remote location, you must also specify the location. For example, the following requests all return different results:

Request specifies the Region ap-northeast-1 with no location. The result is limits and usage data on all instance types that are deployed in us-east-2, by all of the fleets that reside in ap-northeast-1.
Request specifies the Region us-east-1 with location ca-central-1. The result is limits and usage data on all instance types that are deployed in ca-central-1, by all of the fleets that reside in us-east-2. These limits do not affect fleets in any other Regions that deploy instances to ca-central-1.
Request specifies the Region eu-west-1 with location ca-central-1. The result is limits and usage data on all instance types that are deployed in ca-central-1, by all of the fleets that reside in eu-west-1.

This operation can be used in the following ways:

To get limit and usage data for all instance types that are deployed in an Amazon Region by fleets that reside in the same Region: Specify the Region only. Optionally, specify a single instance type to retrieve information for.
To get limit and usage data for all instance types that are deployed to a remote location by fleets that reside in different Amazon Region: Provide both the Amazon Region and the remote location. Optionally, specify a single instance type to retrieve information for.

If successful, an EC2InstanceLimits object is returned with limits and usage data for each requested instance type.

Learn more

Setting up GameLift fleets

Request Syntax


{
   "EC2InstanceType": "string",
   "Location": "string"
}

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

Note

In the following list, the required parameters are described first.

EC2InstanceType

Name of an Amazon EC2 instance type that is supported in GameLift. A fleet instance type determines the computing resources of each instance in the fleet, including CPU, memory, storage, and networking capacity. Do not specify a value for this parameter to retrieve limits for all instance types.

Type: String

Required: No

Location

The name of a remote location to request instance limits for, in the form of an Amazon Region code such as us-west-2.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 64.

Pattern: ^[a-z]+(-([a-z]+|\d))*

Required: No

Response Syntax


{
   "EC2InstanceLimits": [ 
      { 
         "CurrentInstances": number,
         "EC2InstanceType": "string",
         "InstanceLimit": number,
         "Location": "string"
      }
   ]
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

EC2InstanceLimits

The maximum number of instances for the specified instance type.

Type: Array of EC2InstanceLimit objects

Errors

For information about the errors that are common to all actions, see Common Errors.

InternalServiceException

The service encountered an unrecoverable internal failure while processing the request. Clients can retry such requests immediately or after a waiting period.

HTTP Status Code: 500

InvalidRequestException

One or more parameter values in the request are invalid. Correct the invalid parameter values before retrying.

HTTP Status Code: 400

UnauthorizedException

The client failed authentication. Clients should not retry such requests.

HTTP Status Code: 400

UnsupportedRegionException

The requested operation is not supported in the Region specified.

HTTP Status Code: 400

Examples

Request EC2 instance limits for a home Region

In this example, we want to get the instance limits and our current usage for the m5.large instance type in the Amazon region us-west-2 (our default region setting). We have several fleets that reside in that Region and we want to adjust capacity scaling for those fleets. The results indicate that our Amazon account allows these fleets to deploy up to 200 m5.large instances in us-west-2. Currently, the fleets have deployed a total of 25 m5.large instances to that us-west-2.

HTTP requests are authenticated using an Amazon Signature Version 4 signature in the Authorization header field.

Sample Request


{
    "EC2InstanceType": "m5.large"
}

Sample Response


{
    "EC2InstanceLimits": [
        {
            "EC2InstanceType": "m5.large",
            "CurrentInstances": 25,
            "InstanceLimit": 200,
            "Location": "us-west-2"
        }
    ]
}

Request EC2 instance limits for a remote location

In this example, we want to get the instance limits and our current usage for the m5.large instance type for instances that are deployed to sa-east-1 as a remote location by fleets that reside in the Amazon Region ap-southeast-2. The results indicate that our Amazon account allows these fleets to deploy up to 100 m5.large instances in sa-east-1 and have currently deployed a total of zero.

HTTP requests are authenticated using an Amazon Signature Version 4 signature in the Authorization header field.

Sample Request


{
    "EC2InstanceType": "m5.large",
    "Location": "sa-east-1"
}

Sample Response


{
    "EC2InstanceLimits": [
        {
            "EC2InstanceType": "m5.large",
            "CurrentInstances": 0,
            "InstanceLimit": 200,
            "Location": "sa-east-1"
        }
    ]
}