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Showing content from https://docs.aws.amazon.com/gamelift/latest/apireference/API_TerminateGameSession below:

TerminateGameSession - Amazon GameLift Servers

TerminateGameSession

Ends a game session that's currently in progress. Use this action to terminate any game session that isn't in ERROR status. Terminating a game session is the most efficient way to free up a server process when it's hosting a game session that's in a bad state or not ending properly. You can use this action to terminate a game session that's being hosted on any type of Amazon GameLift Servers fleet compute, including computes for managed EC2, managed container, and Anywhere fleets. The game server must be integrated with Amazon GameLift Servers server SDK 5.x or greater.

Request options

Request termination for a single game session. Provide the game session ID and the termination mode. There are two potential methods for terminating a game session:

Initiate a graceful termination using the normal game session shutdown sequence. With this mode, the Amazon GameLift Servers service prompts the server process that's hosting the game session by calling the server SDK callback method OnProcessTerminate(). The callback implementation is part of the custom game server code. It might involve a variety of actions to gracefully end a game session, such as notifying players, before stopping the server process.
Force an immediate game session termination. With this mode, the Amazon GameLift Servers service takes action to stop the server process, which ends the game session without the normal game session shutdown sequence.

Results

If successful, game session termination is initiated. During this activity, the game session status is changed to TERMINATING. When completed, the server process that was hosting the game session has been stopped and replaced with a new server process that's ready to host a new game session. The old game session's status is changed to TERMINATED with a status reason that indicates the termination method used.

Learn more

Add Amazon GameLift Servers to your game server

Amazon GameLift Servers server SDK 5 reference guide for OnProcessTerminate() (C++) (C#) (Unreal) (Go)

Request Syntax

{
   "GameSessionId": "string",
   "TerminationMode": "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.

GameSessionId

A unique identifier for the game session to be terminated. A game session ARN has the following format: arn:aws:gamelift:<location>::gamesession/<fleet ID>/<custom ID string or idempotency token>.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 512.

Pattern: [a-zA-Z0-9:/-]+

Required: Yes

TerminationMode

The method to use to terminate the game session. Available methods include:

TRIGGER_ON_PROCESS_TERMINATE â Prompts the Amazon GameLift Servers service to send an OnProcessTerminate() callback to the server process and initiate the normal game session shutdown sequence. The OnProcessTerminate method, which is implemented in the game server code, must include a call to the server SDK action ProcessEnding(), which is how the server process signals to Amazon GameLift Servers that a game session is ending. If the server process doesn't call ProcessEnding(), the game session termination won't conclude successfully.
FORCE_TERMINATE â Prompts the Amazon GameLift Servers service to stop the server process immediately. Amazon GameLift Servers takes action (depending on the type of fleet) to shut down the server process without the normal game session shutdown sequence.

Note

This method is not available for game sessions that are running on Anywhere fleets unless the fleet is deployed with the Amazon GameLift Servers Agent. In this scenario, a force terminate request results in an invalid or bad request exception.

Type: String

Valid Values: TRIGGER_ON_PROCESS_TERMINATE | FORCE_TERMINATE

Required: Yes

Response Syntax

{
   "GameSession": { 
      "CreationTime": number,
      "CreatorId": "string",
      "CurrentPlayerSessionCount": number,
      "DnsName": "string",
      "FleetArn": "string",
      "FleetId": "string",
      "GameProperties": [ 
         { 
            "Key": "string",
            "Value": "string"
         }
      ],
      "GameSessionData": "string",
      "GameSessionId": "string",
      "IpAddress": "string",
      "Location": "string",
      "MatchmakerData": "string",
      "MaximumPlayerSessionCount": number,
      "Name": "string",
      "PlayerSessionCreationPolicy": "string",
      "Port": number,
      "Status": "string",
      "StatusReason": "string",
      "TerminationTime": number
   }
}

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.

GameSession

Properties describing a game session.

A game session in ACTIVE status can host players. When a game session ends, its status is set to TERMINATED.

Amazon GameLift Servers retains a game session resource for 30 days after the game session ends. You can reuse idempotency token values after this time. Game session logs are retained for 14 days.

All APIs by task

Type: GameSession object

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

InvalidGameSessionStatusException

The requested operation would cause a conflict with the current state of a resource associated with the request and/or the game instance. Resolve the conflict before retrying.

HTTP Status Code: 400

InvalidRequestException

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

HTTP Status Code: 400

NotFoundException

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

HTTP Status Code: 400

NotReadyException

The operation failed because Amazon GameLift Servers has not yet finished validating this compute. We recommend attempting 8 to 10 retries over 3 to 5 minutes with exponential backoffs and jitter.

HTTP Status Code: 400

UnauthorizedException

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

HTTP Status Code: 400

Examples Terminate a game session

In this example, we want to gracefully end a game session that's entered a bad state. The game session is being hosted on a managed EC2 fleet.

Sample Request

{
  "GameSessionId": "arn:aws:gamelift:us-west-2::gamesession/fleet-9999ffff-88ee-77dd-66cc-5555bbbb44aa/gsess-4444dddd-55ee-66ff-77aa-8888bbbb99cc",
  "TerminationMode": "TRIGGER_ON_PROCESS_TERMINATE"
}

CLI syntax:
    aws gamelift terminate-game-session --game-session-id "arn:aws:gamelift:us-west-2::gamesession/fleet-9999ffff-88ee-77dd-66cc-5555bbbb44aa/gsess-4444dddd-55ee-66ff-77aa-8888bbbb99cc" --termination-mode "TRIGGER_ON_PROCESS_TERMINATE"

Sample Response

{
  "GameSession": {
    "CreationTime": 1469498468.057, 
    "CurrentPlayerSessionCount": 5, 
    "FleetArn": "arn:aws:gamelift:us-west-2::fleet/fleet-9999ffff-88ee-77dd-66cc-5555bbbb44aa",
    "FleetId": "fleet-9999ffff-88ee-77dd-66cc-5555bbbb44aa", 
    "GameProperties": [
      {"Key": "difficulty","Value": "easy"},
      {"Key": "gameMap","Value": "Snowfall"},
      {"Key": "gameMode","Value": "Explore"}
    ],
    "GameSessionId": "arn:aws:gamelift:us-west-2::gamesession/fleet-9999ffff-88ee-77dd-66cc-5555bbbb44aa/gsess-4444dddd-55ee-66ff-77aa-8888bbbb99cc", 
    "IpAddress": "192.0.2.0", 
    "Location": "us-west-2",
    "MaximumPlayerSessionCount": 10, 
    "Name": "Matt's Awesome Game win123", 
    "PlayerSessionCreationPolicy": "ACCEPT_ALL",
    "Port": "8080",
    "Status": "ACTIVE"
  } 
}