THIS IS WORK IN PROGRESS AND CAN CHANGE ANY TIME
At the moment we are developing a simple plugin for odysseus.
To try the current state you could use the following docker file:
FROM node:14 as node-base RUN echo "Installing required packages..." && \ apt-get update && \ apt-get install -yq --no-install-recommends python RUN echo "Cloning Odysseus Grafana plugin source..." && \ git clone https://git.swl.informatik.uni-oldenburg.de/scm/api_apps/grafana.git /var/lib/ody_grafana WORKDIR /var/lib/ody_grafana/grafana-plugins/odysseus RUN mkdir build RUN echo "Building Odysseus Grafana plugin binaries..." && \ yarn install && \ yarn dev FROM grafana/grafana:7.4.3 AS grafana RUN echo "Copying Odysseus Grafana plugin binaries..." COPY --from=node-base /var/lib/ody_grafana/grafana-plugins/odysseus /var/lib/grafana/plugins/ody-streaming-datasource WORKDIR /usr/share/grafana USER grafana ENTRYPOINT [ "/run.sh" ]
docker build . -t grafana docker run -d -p 3000:3000 --name grafana grafana
Then you could use Odysseus in grafana as a datasource.
You will need to provide the server-adress: e.g. with ws://localhost:8888/
ATM there are some shortcommings that will be removed in future versions:
You will need to determine the websocket address manually by using a webbrowser (we recommend Firefox because of better JSON presentation) (http://localhost:8888/queries/<nr>) and find the section websockets with protocol JSON and use the entry with uri for creating panels in grafana:
The output of the connected query
- should contain an attribute named time with a milliseconds timestamp (typically this should be a current timestamp for grafana)
- all other attributes should be numeric attributes
A short video
The video can also be found here https://odysseus.informatik.uni-oldenburg.de/download/documentation/videos/grafana/odysseus_grafana_tutorial.mp4
In addition, here is a brief READ.ME.
We need a grafana plugin to be able to receive data from Odysseus. Note that the current state of the plugin is experimental. Wiki-Page: https://wiki.odysseus.informatik.uni-oldenburg.de/display/ODYSSEUS/Grafana Requirements: docker 1. build a docker image based on the dockerfile in this folder docker build . -t grafana 2. build and run a docker container based on the created image docker run -d -p 3000:3000 --name grafana grafana 3. open grafana in a browser localhost:3000 username: admin password: admin 4. Add an Odysseus datasource Requirements: Running Odysseus Server (or monolithic of course) Configuration -> Data Sources Select Others -> odysseus Server URI: ws://localhost:8888/ (REST-port of a (here local) odysseus server) Leave API Key empty 5. Create Dashboard Create -> Dashboard 6. Create Panel Requirements: * To visualize single datastream attributes, there must be an operator that provides only the current timestamp named "time" and that attribute * To easily find the operator, give him a proper name * Query(s) should be installed Tipps: a) At the end of the query, create for each attribute you want to visualize a projection on "time" and the attribute b) Grafana can display historical values but to show the results in real-time, the timestamps of the results should be set to the current time (necessary if you, e.g., read from a CSV file with old timestamps) 6.1. select your Odysseus datasource as datasource 6.2. you need a websocket that provides the data 6.3. open in a browser localhost:8888/queries to get information about all installed queries (in chrome it is not formatted; copy the content in, e.g., https://jsonformatter.curiousconcept.com/) 6.4. find the websocket in the json go to the query id of your query -> rootOperators -> go to the operator providing the data to visualize -> ports -> websockets -> copy the JSON uri 6.5. Insert the copied URI in grafana into the websocket field of the panel query 6.6. Click on apply and after that on save dashboard
and https://grafana.com/docs/grafana/latest/developers/plugins/build-a-streaming-data-source-plugin/ for further information how to extend the current implementation.