Draft: Allow datasource to be tested through Grafana after creation

[rrey]

SUMMARY

Introduce post create/update datasource test for Prometheus datasource.

Refs: #220

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

grafana_datasource.py

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[rrey]

/rebase

[kongslund]

In the documentation for the API in Grafana 9.0.x, there's an endpoint for checking the data source health:

/api/datasources/uid/:uid/health

It would be desirable if we could utilize that endpoint in a generic fashion for all current and future data sources.

However, I cannot get it to check the health of Prometheus when using Grafana 9.0.4. I'm not sure if I'm overlooking something simple?

1. The Prometheus data source looks like this:

Request:

export GF_API_KEY=<Grafana API key with Admin role>
curl -H 'Accept: application/json' \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $GF_API_KEY" \
  "http://localhost:3000/api/datasources/uid/U2LhXyg4k"

Response:

{"id":1,"uid":"U2LhXyg4k","orgId":1,"name":"Prometheus","type":"prometheus","typeLogoUrl":"","access":"proxy","url":"http://host.docker.internal:9090","user":"","database":"","basicAuth":false,"basicAuthUser":"","withCredentials":false,"isDefault":true,"jsonData":{"httpMethod":"POST"},"secureJsonFields":{},"version":2,"readOnly":false}

2. But when requesting to check the health a "Not found" is returned.

Request:

curl -H 'Accept: application/json' \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $GF_API_KEY" \
  "http://localhost:3000/api/datasources/uid/U2LhXyg4k/health"

Response:

{"message":"Not found","traceID":"00000000000000000000000000000000"}

3. The Grafana log gives the error "method not implemented" so perhaps this is just not implemented for the Prometheus data source?

ERROR[07-23|08:53:28] Not found                                logger=context traceID=00000000000000000000000000000000 userId=0 orgId=1 uname= error="method not implemented" remote_addr=172.17.0.1 traceID=00000000000000000000000000000000

[rrey]

@kongslund FYI I have the same result on my side with the health endpoint.
It looks worth an issue on the Grafana side