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Container fleets do not have a launch parameter. You just have an entry point of the container group definition and it just runs that. Using multiple container fleets with different game server containers could be an option. How do you decide what parameters to pass? There's GameSessionData if that looks interesting to you - https://docs.aws.amazon.com/gameliftservers/latest/apireference/API_GameSession.html.
When working with Amazon GameLift container fleets, the approach to specifying server parameters differs from traditional GameLift fleets.
For container fleets, you don't specify server process parameters directly in the create-container-fleet command. Instead, these parameters are defined in the container group definition that you reference when creating the fleet.
The container group definition includes details about your containers, including the launch parameters for your game server processes. You would define these parameters when creating or updating your container group definition, and then reference this definition when creating your container fleet.
For example, when updating a container fleet, you would reference a specific container group definition that contains your desired configuration:
aws gamelift update-container-fleet \
--fleet-id "your-fleet-id" \
--game-server-container-group-definition-name "arn:aws:gamelift:region:account:containergroupdefinition/YourContainerGroup:version"
The container group definition would contain all the necessary configuration for your game server processes, including any parameters they need to run.
If you need to run different types of servers using the same binaries but with different parameters, you would need to create different container group definitions that specify these different parameters, and then create separate container fleets referencing each definition.
This differs from traditional GameLift fleets where you can specify server process parameters directly in the create-fleet command using the --runtime-configuration parameter.
Sources
Update an Amazon GameLift Servers managed container fleet - Amazon GameLift Servers
Amazon GameLift Servers examples using AWS CLI - AWS SDK Code Examples
This is the version of the AWS CLI that I'm using:
aws-cli/2.27.49 Python/3.13.4 Windows/11 exe/AMD64When I run
aws gamelift create-container-group-definition help, there doesn't appear to be any way to specify the launch parameters. Looking at the docs, similarly there doesn't seem to be a way to specify this:https://docs.aws.amazon.com/gameliftservers/latest/apireference/API_CreateContainerGroupDefinition.html https://docs.aws.amazon.com/gameliftservers/latest/apireference/API_GameServerContainerDefinitionInput.html
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- asked a year ago
We have a defined set of "server types". Each of them uses the same packaged game and server binaries, because the server binaries are relatively small and quick to load.
Using "standard" fleets, our flow looked something like this:
At least according to the documentation for "create-container-group-definition", it doesn't seem like you can actually specify the entry point. It seems like we'd actually need to upload different Build Images to ECR that had the ENTRYPOINT set in the dockerfile directly. If you can set the entrypoint separately, then that would also solve our issue.
https://docs.aws.amazon.com/cli/latest/reference/gamelift/create-container-group-definition.html
What would be nice is if the Container Fleets worked the same way. E.G.
We could create mappings from fleet to settings and then at server process startup change maps, configurations, etc. However, with the flow of just passing things via the commandline, it allows us to make command line tweaks and update a fleet, rather than having to create and upload a new build each time (which is very time consuming).
If you want to keep all the builds in the same ECR Image, you could try using environment overrides to point the dockerfile to the correct entrypoint. It would still require a new container group definition for each server type. https://docs.aws.amazon.com/gameliftservers/latest/apireference/API_GameServerContainerDefinitionInput.html#gameliftservers-Type-GameServerContainerDefinitionInput-EnvironmentOverride