ECS service does not add CloudWatch metric via EMF

Question

I tried to add the metric of my ECS using EMF but it does not work.
When I uses for Lambda function it works, so I'd like to know if I am missing something or having the wrong parameters.
The following struct is what I send:

```
 {
    "level": "error",
    "caller": "server/server.go:346",
    "function": "main/server.(*Server).respond",
    "msg": "xxxxx",
    "_aws": {
        "Timestamp": 1693323353466,
        "CloudWatchMetrics": [
            {
                "Namespace": "ecs_name",
                "Dimensions": [
                    [
                        "TaskDefinition"
                    ]
                ],
                "Metrics": [
                    {
                        "Name": "ecs_error",
                        "Unit": ""
                    }
                ]
            }
        ]
    },
    "ecs_error": 1,
    "TaskDefinition": "ecs_tack_name",
    "stacktrace": "xxxx"
}
```

Answer

Hi,

Did you set up a **awslogs** log driver to send EMF json file to Cloud watch Logs ?
With Lambda you don't need to set up a log driver because by default STOUT is redirected to Cloud watch Logs.

Answer

Okay,
And what about Metric section ?
Unit is empty, you should set something like Count or something else.

ECS service does not add CloudWatch metric via EMF

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