Thanks for reporting this issue. As you mentioned the logrotate is not correctly configured and it should be pointing to
As you can see in the changelog,
============= CHANGELOG =============
Version 2.1.1-3 2018-03-15
* Fix Logrotate configuration
we just released a new revision of the CouchDB stack (2.1.1-3) fixing the reported issue. It's already available at bitnami.com and the Bitnami Launchpad for Google.
Please feel free to use the new version.
Carlos R. Hernández