It would be good to add behaviour to load jdbc datasource properties file from the classpath too and not only from 'abs/relative' path. This is a change of the default behaviour and it should be considered maybe rather for some major release or if discussed at https://developer.jboss.org/message/979661?

The fix is here
https://github.com/ochaloup/narayana/commit/c383cf7fc860345b795efb5b38eeccc9f4b7cef6#diff-bd20187ffd140b809ffa8b6e38b6ec47L60

Info on using driver is here
https://jbossts.blogspot.cz/2017/12/narayana-jdbc-transactional-driver.html#driver-direct