# Specifying AWS Neuron machine learning in an Amazon ECS task definition
<a name="ecs-inference-task-def"></a>

The following is an example Linux task definition for `inf1.xlarge`, displaying the syntax to use.

```
{
    "family": "ecs-neuron",
    "requiresCompatibilities": ["EC2"],
    "placementConstraints": [
        {
            "type": "memberOf",
            "expression": "attribute:ecs.os-type == linux"
        },
        {
            "type": "memberOf",
            "expression": "attribute:ecs.instance-type == inf1.xlarge"
        }
    ],
    "executionRoleArn": "${YOUR_EXECUTION_ROLE}",
    "containerDefinitions": [
        {
            "entryPoint": [
                "/usr/local/bin/entrypoint.sh",
                "--port=8500",
                "--rest_api_port=9000",
                "--model_name=resnet50_neuron",
                "--model_base_path=s3://amzn-s3-demo-bucket/resnet50_neuron/"
            ],
            "portMappings": [
                {
                    "hostPort": 8500,
                    "protocol": "tcp",
                    "containerPort": 8500
                },
                {
                    "hostPort": 8501,
                    "protocol": "tcp",
                    "containerPort": 8501
                },
                {
                    "hostPort": 0,
                    "protocol": "tcp",
                    "containerPort": 80
                }
            ],
            "linuxParameters": {
                "devices": [
                    {
                        "containerPath": "/dev/neuron0",
                        "hostPath": "/dev/neuron0",
                        "permissions": [
                            "read",
                            "write"
                        ]
                    }
                ],
                "capabilities": {
                    "add": [
                        "IPC_LOCK"
                    ]
                }
            },
            "cpu": 0,
            "memoryReservation": 1000,
            "image": "763104351884.dkr.ecr.us-east-1.amazonaws.com/tensorflow-inference-neuron:1.15.4-neuron-py37-ubuntu18.04",
            "essential": true,
            "name": "resnet50"
        }
    ]
}
```