Kapacitor databases gets deleted on container restart

Summary

For some reason, Kapacitor stores its database in /kapacitor.db instead of /var/lib/kapacitor/kapacitor.db.

When you restart the container, the database is lost.

Possible fixes

Add to kapacitor.conf:

[replay]
  dir = "{{ _kapacitor_container_data_directory }}/replay"

[storage]
  boltdb = "{{ _kapacitor_container_data_directory }}/kapacitor.db"