Installation of the Docker container

The CometVisu project offers officially built Docker containers that are available at DockerHub cometvisu/cometvisu.


The newest releases are available as tag with their release name as well as latest for the most current release.

The current development versions can be found by the tag testing-<date> as well as testing alone for the most current one. When during the development process a new pull request get’s merged a new testing container will be automatically built and filed under the current date. If a tag does not exist for this date, it will be created, and if the tag already exists, it will be overwritten with the newly created container.


Environment parameters

The container gets its configuration by the environment variables. Available is:

Parameter Default Description
KNX_INTERFACE iptn: Setting this to empty string, will prevent the knxd from being started
KNX_PA 1.1.238 Physical address (PA) for the knxd
KNXD_PARAMETERS -u -d/var/log/eibd.log -c Additional parameters for the knxd
CGI_URL_PATH /cgi-bin/ Set the URL prefix to find the cgi-bin resources
BACKEND_PROXY_SOURCE   Proxy paths starting with this value, e.g. /rest for openHAB backend
BACKEND_PROXY_TARGET   Target URL for proxying the requests to BACKEND_PROXY_SOURCE, e.g. http://<openhab-server-ip-address>:8080/rest for openHAB backend

Classiscal (knxd with eibread-cgi/eibwrite-cgi)

For the classical backend a knxd is used. It connects the CometVisu via eibread-cgi and eibwrite-cgi to the KNX bus.

The most important environment parameter is KNX_INTERFACE which must be adapted to the local system to connect to the KNX interface. The documentation for the currently used version of the knxd can be consulted at the knxd wiki.


Example configuration for the OpenHAB backend (assuming it is running on a server with the address



Configuration files

To make the configuration data persistent over restarts or new setups like version upgrades they must be stored in a volume. For this the directory /var/www/html/config (up to version 0.10.2) or /var/www/html/resource/config (starting with release 0.11) is exported as a volume.

RRD (diagram plugin)

For the diagram plugin RRD files with the time series can be supplied. Those must the located and thus mounted at the path /var/www/rrd. The RRD files themself have to be filled and updated outside of this container. For that the RRD volume could be mounted in a different container at the same time.


The container exports port 80 for the web server.