GameLiftAgent

GameLiftAgent is a Java application that is used to launch game server processes on Amazon GameLift fleets.

This application registers a compute resource for an existing Amazon GameLift fleet using the RegisterCompute API. The application also calls the GetComputeAuthToken API to fetch an authorization token for the compute resource, using it to make a web socket connection to the Amazon GameLift service.

Quick Start

JDK Version

GameLiftAgent was built with Java 17 and will require (at least) this version to compile. Check the java version.

java -version

If the java version is not showing Java 17, then you will have to install Java 17.

Build the GameLiftAgent using Maven

The GameLiftAgent requires a minimum version of 3.2.5. for Maven to run. Check your maven version with the command:

mvn -version

If the Maven version is less than version 3.2.5, you will have to update the Maven version to be at least version 3.2.5.

1. Navigate to the GameLiftAgent package root (directory including pom.xml file)
2. Execute the following to download dependencies, compile the project and generate a standalone jar using Maven:

mvn clean compile assembly:single

If this successfully compiles, then GameLiftAgent-1.0.jar will become available in the following path:

ls ./target/GameLiftAgent-1.0.jar

Before running the application/jar

Make sure you have an active Anywhere fleet and an active compute for the fleet before running the JAR. The LaunchPath for the Server Process should be the in the same location as a game build executable or Realtime Servers script. Use the following commands to perform the setup:

1. Copy the GameLiftAgent-1.0.jar to the directory (Example: /local/game or C:\game).

Linux

cp ./target/GameLiftAgent-1.0.jar /local/game

Powershell

Copy-Item -Path .\target\GameLiftAgent-1.0.jar -Destination C:\game\

2. Then move the game executable to the same directory (/local/game).

Linux

cp [GAME_EXECUTABLE] /local/game

Powershell

Copy-Item -Path [GAME_EXECUTABLE] -Destination C:\game\

3. Grant read and execute permissions to run the JAR and the game executable.

Linux

sudo chmod 755 /local/game/GameLiftAgent-1.0.jar
sudo chmod 755 /local/game/[GAME_EXECUTABLE]

Run the application/jar

Use the following instructions to run the application:

1. The standalone jar will be located in ./target/ and can be launched with a command such as the following (There are some example launch commands listed at the end):

java -jar ./target/GameLiftAgent-1.0.jar <Command Line Options>

Command Line Options

1. certificate-path / cp
   1. Optional - path to TLS certificate on compute resource. The path and certificate are not validated by Amazon GameLift.
2. compute-name / c
   1. Required - A descriptive label that is associated with the compute resource registered to your fleet.
   2. May also be provided using environment variable GAMELIFT_COMPUTE_NAME instead of specifying as a command line option.
   3. For managed Amazon GameLift, this is set by Amazon GameLift to environment variable GAMELIFT_COMPUTE_NAME. No command line option required.
3. dns-name / dns
   1. Optional - The DNS name of the compute resource. (this option is not yet available)
   2. This option is used with Amazon GameLift Anywhere fleets only. Either dns-name or ip-address is required.
4. fleet-id / f
   1. Required - A unique identifier for the GameLift fleet on which the compute resource will be registered.
   2. May also be provided via environment variable GAMELIFT_FLEET_ID instead of specifying as a command line option.
   3. For managed Amazon GameLift, this is set by Amazon GameLift to environment variable GAMELIFT_FLEET_ID. No command line option required.
5. gamelift-endpoint-override / gleo
   1. Optional - For internal testing purposes. Using this option will likely result in errors.
6. gamelift-credentials / glc
   1. Optional - The source of credentials, which are used by the Amazon GameLift client make the RegisterCompute and GetComputeAuthToken API calls.
   2. Options are as follows (default is instance-profile):
      1. instance-profile - Uses credentials from the IAM profile associated with the Amazon GameLift EC2 fleet instance.
      2. container - Uses credentials from an ECS container IAM profile.
      3. environment-variable - Uses temporary IAM role credentials exported to environment variables.
7. game-session-log-bucket / gslb
   1. Optional - The name of an Amazon S3 bucket in the AWS account to upload game session logs.
   2. Using this option requires Amazon GameLift fleets to specify an InstanceRoleArn. The IAM role must include s3:PutObject permission.
   3. Using this option results in InstanceRoleArn credentials being fetched and cached via the web socket GetFleetRoleCredentials route.
8. ip-address / ip
   1. Optional - The IP address of the compute resource.
   2. This option is used with Amazon GameLift Anywhere fleets only. Either dns-name or ip-address is required.
9. location / loc
   1. Optional - The location where the compute resource resides.
   2. Required for Amazon GameLift Anywhere fleets. Must match the custom location registered on the fleet.
   3. For Amazon GameLift EC2 fleets, this option is set by Amazon GameLift to environment variable GAMELIFT_REGION. No command line option required.
10. gamelift-agent-log-bucket / galb
    1. Optional - The name of an Amazon S3 bucket in the AWS account to upload logs for GameLiftAgent.
    2. Using this option requires Amazon GameLift fleets to specify an InstanceRoleArn. The IAM role must include s3:PutObject permission.
    3. Using this option results in InstanceRoleArn credentials being fetched and cached via the web socket GetFleetRoleCredentials route.
11. gamelift-agent-log-path / galp
    1. Optional - The file path where GameLiftAgent logs are stored locally. During launch, parent directories are created as required for this path.
    2. Defaults are /local/gameliftagent/logs for Linux and C:\\GameLiftAgent\\Logs\\ for Windows.
12. region / r
    1. Required - The AWS region used when creating GameLift fleets.
    2. May also be provided using environment variable GAMELIFT_REGION instead of specifying as a command line option.
    3. For managed Amazon GameLift, this is set by Amazon GameLift to environment variable GAMELIFT_REGION. No command line option required.
13. runtime-configuration / rc
    1. Optional - A static RuntimeConfiguration provided as inline JSON.
    2. For managed Amazon GameLift Fleets, RuntimeConfiguration should set when creating or updating an Amazon GameLift fleet. No command line option required.

Example Launch Commands - Managed GameLift

Linux

java -jar /<path>/<to>/GameLiftAgent-1.0.jar \
  -c '<compute-name>' \
  -f '<fleet id>' \
  -loc 'custom-<custom location name>' \
  -r '<region name>' \
  -glc environment-variable \
  -gslb 'gameliftgamesessionlogS3bucketname' \
  -galb 'gameliftagentlogS3bucketname' \
  -galp '/local/gameliftagent/logs/'

Windows

java -jar C:\\path\\to\\GameLiftAgent-1.0.jar `
  -c '<compute-name>' \
  -f '<fleet id>' \
  -loc 'custom-<custom location name>' \
  -r '<region name>' \
  -glc environment-variable \
  -gslb 'gameliftgamesessionlogS3bucketname' `
  -galb 'gameliftagentlogS3bucketname' `
  -galp 'C:\\GameLiftAgent\\logs\\'

Example Environment Variables - Managed GameLift

Linux

export GAMELIFT_FLEET_ID=fleet-<id>
export GAMELIFT_COMPUTE_NAME=gamelift-compute-name
export GAMELIFT_REGION=us-west-2
export GAMELIFT_LOCATION=custom-<custom location name>

Windows

set GAMELIFT_FLEET_ID=fleet-<id>
set GAMELIFT_COMPUTE_NAME=gamelift-compute-name
set GAMELIFT_REGION=us-west-2
set GAMELIFT_LOCATION=custom-<custom location name>

Security

See CONTRIBUTING for more information.

License

This project is licensed under the Apache-2.0 License.