DescribeRuntimeConfiguration - Amazon GameLift
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Retrieves a fleet's runtime configuration settings. The runtime configuration tells Amazon GameLift which server processes to run (and how) on each instance in the fleet.

To get the runtime configuration that is currently in forces for a fleet, provide the fleet ID.

If successful, a RuntimeConfiguration object is returned for the requested fleet. If the requested fleet has been deleted, the result set is empty.

Learn more

Setting up Amazon GameLift fleets

Running multiple processes on a fleet

Request Syntax

{ "FleetId": "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.


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


A unique identifier for the fleet to get the runtime configuration for. You can use either the fleet ID or ARN value.

Type: String

Pattern: ^fleet-\S+|^arn:.*:fleet\/fleet-\S+

Required: Yes

Response Syntax

{ "RuntimeConfiguration": { "GameSessionActivationTimeoutSeconds": number, "MaxConcurrentGameSessionActivations": number, "ServerProcesses": [ { "ConcurrentExecutions": number, "LaunchPath": "string", "Parameters": "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.


Instructions that describe how server processes should be launched and maintained on each instance in the fleet.

Type: RuntimeConfiguration object


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


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


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

HTTP Status Code: 400


THe requested resources was not found. The resource was either not created yet or deleted.

HTTP Status Code: 400


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

HTTP Status Code: 400


Request the runtime configuration for a fleet

This example retrieves the current runtime configuration for a specified fleet. As shown, the requested fleet is configured to run four concurrent processes with the production game server executable, one with debug mode turned on. The property MaxConcurrentGameSessionActivations is set to the default value, which essentially places no limit on concurrent activations.

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

Sample Request

{ "FleetId": "fleet-2222bbbb-33cc-44dd-55ee-6666ffff77aa" }

Sample Response

{ "RuntimeConfiguration": { "ServerProcesses": [ { "LaunchPath": "C:\game\Bin64.Release.Dedicated\MegaFrogRace_Server.exe", "Parameters": "+gamelift_start_server", "ConcurrentExecutions": 3 }, { "LaunchPath": "C:\game\Bin64.Release.Dedicated\MegaFrogRace_Server.exe", "Parameters": "+gamelift_start_server +debug", "ConcurrentExecutions": 1 } ], "MaxConcurrentGameSessionActivations": 2147483647, "GameSessionActivationTimeoutSeconds": 300 } }

See Also

For more information about using this API in one of the language-specific Amazon SDKs, see the following: