Kapacitor volume mounting (docker)

I am trying to run influxdb and kapacitor in Docker, based on the official influxdata containers on docker hub. Influxdb installs and runs fine. Kapacitor not. I am running on an mac with docker machine (latest, installed earlier this week without any issues)

Following the documented instruction, right after installation from docker hub, I start kapacitor:
$ docker run -p 9092:9092 kapacitor
this runs fine.

Next, I tried to mount a local volume (as documented in "how to use this image")

1. create empty directory /Users/username/mydocker/kapacitor
2. $docker run -p 9092:9092 -v /Users/username/mydocker/kapacitor:/var/lib/kapacitor kapacitor

This causes the error:
E! open server: open service *storage.Service: open boltdb @ "/var/lib/kapacitor/kapacitor.db": invalid argument

Now I am stuck. Can't figure out how to solve this error. Neither can I find any related solutions anywhere. Hope anyone can help me solve this issue.

Hans

PS: in my investigation I also discovered that the current Docker image is not fully up-to-date yet. It is running 1.2.0. As a maintainer on docker hub, would you please also update kapacitor (influxdb is fully up-to-date, kapacitor not)

Start by reproducing the documented docker run command with the bind mount at /var/lib/kapacitor and compare it with the image configuration. Check the Kapacitor Docker image currently tagged in the repository against the reported 1.2.0 image. Done means the mounted container starts successfully and the published image is up to date if an image update is in scope.