AWS Provisioner

The AWS provisioner provisions EC2 spot instances in response to queue length. It is identified with aws-provisioner-v1 as the provisionerId in a task definition. Its administrative interface is available at This interface allows monitoring of current load, as well as management of worker types.

The worker types provided by the AWS provisioner are a mix: some are Firefox-specific, while others are available for other Mozilla uses. Since the service runs with the TaskCluster team's AWS credentials, all costs are borne by the TaskCluster team.

If you are setting up a new worker type with a new AMI, it is your responsibility to ensure that a worker starts on the AMI when the AMI boots that this worker understand the task payload and shutdown when no more tasks are available from the queue,