ECS Fargate Log Configuration - How to set the retention policy?

Question

I have been using ECS Fargate to launch containers that are designed to execute some tasks and terminate once done. In the task definition, I have given `awslogs` as the `logDriver` and `awslogs-create-group` set to `true` so that each time it creates a log group in CloudWatch.
But I notice in CW that the retention policy of the log groups is set to 'Never Expire', and over time there are many log groups that simply exist even though the cluster behind it are terminated.
How can I ensure that the log groups are deleted as soon as the Fargate cluster/task is terminated?

Accepted Answer

Hi, Good question

I think you can use 
```
 put-retention-policy
--log-group-name 
--retention-in-days 
[--cli-input-json ]
[--generate-cli-skeleton ]
```

https://docs.aws.amazon.com/cli/latest/reference/logs/put-retention-policy.html

Answer

Actually, you can create LogGroup yourself and attach it to the Task Definition like here if you are using CloudFormation.

Then in LogGroup, you can simply set retention and another benefit is that LogGroup will be removed together with CloudFormation stack.

ECS Fargate Log Configuration - How to set the retention policy?

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