Support filtering what units' logs to publish to AWS Logs

[holyjak]

You don't always need all the logs from the instance and would like to reduce AWS CW Logs cost by only sending there those you really need. So it would be awesome if the service supported something like

--include-units myapp.service,some_other.unit,...

Thoughts?

[holyjak]

Or perhaps #16 does exactly this, with its support for the filters config value?