Set log retention for custom resources

[iamhopaul123]

Now the logs for custom resources never expire. However, most of them won't make any sense after 30/60 days after deployment. And users need to clean those log groups periodically. It would be great if we can set log retention for custom resource log group by default.

[rymndhng]

@iamhopaul123 any insight into whether this will be prioritized?

[KollaAdithya]

Hello @rymndhng !

You can set the Logging configuration of lambda using yaml patch overrides

For example

- op: add
  path: /Resources/EnvControllerFunction/Properties/LoggingConfig
  value:
    ApplicationLogLevel: TRACE
    LogFormat: <optional custom format>
    LogGroup: <custom log group name>
    SystemLogLevel: WARN

And a log group with retention of 30 days.

- op: add
  path: /Resources/EnvControllerLogGroup
  value:
    Type: AWS::Logs::LogGroup
    Properties:
      LogGroupName: !Join ['', [/copilot/, !Ref AppName, '-', !Ref EnvName, '-controller']]
      RetentionInDays: 30

docs: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-lambda-function-loggingconfig.html#cfn-lambda-function-loggingconfig-loggroup