Grafana - Bad Request These fields have problems: metric_id

Troubleshooting
,
1

CMK version: Checkmk Enterprise Edition 2.2.0p9 with 3.1.1
Grafana v10.1.4 with cmk datasource

Using Grafana to visualise a few metrics from checkmk. This is mostly working well however for a specific “single metric” (output from a custom plugin) I always get the error in grafana

Query error
Bad Request These fields have problems: metric_id

Using a curl request i also see

{
    "title": "Bad Request",
    "status": 400,
    "detail": "These fields have problems: metric_id",
    "fields": {
        "metric_id": [
            "Missing data for required field."
        ]
    }
}

I fail to understand what “metric_id” is or how/where to set this. The graphing in cmk is working as expected.

Many thanks for any tips

2

In order to figure our what’s going wrong more information is needed: a screenshot of the query in grafana and the data/request that grafana sends to checkmk. (you can see this data either via network tab in developer tools of your browser, or via “inspect query” in grafana)

3

Here is a screenshot, with hopefully useful information

image
image1886×515 75.6 KB

4

Hmm … could it perhaps be the presence of square brackets “” in the “single metric” name?

5

Yes, I think this could be the case. Valid metric names can only consist of -, _ and alphanumeric charaters: https://github.com/Checkmk/checkmk/blob/0a3b7682fad6f110ee2819d72dba72da40e35513/cmk/gui/openapi/endpoints/metric/common.py#L16-L20

Do you use a mkp or custom code to create this metric?
Can checkmk display those metrics?

6

The check is a custom python script…
checkmk, at least from what i can tell, has no problem in the UI displaying the output.

Nonetheless I can change and remove the characters…