Unable to connect with Loki in my homeLab

[mdcravero]

I everyone!

I’m trying to configure loki-stack in my HomeLab with kubernetes.
I can configure grafana/prometheus without problems, but I haven’t had any luck with Loki.
All resources are in the same namespace “Monitoring”

Is strange because when I do a curl since a grafana Pod
I get the response “ready”!

grafana-5f4d467645-68t25:/usr/share/grafana$ curl http://loki-stack:3100/ready
ready

But in the UI I get “Unable to connect with Loki. Please check the server logs for more details.”

In the Grafana logs I get the following error:

logger=context userId=1 orgId=1 uname=root t=2025-05-14T20:09:50.653762733-03:00 level=info msg="Request Completed" method=GET path=/api/datasources/uid/PFD47E6011A697DC0/health status=400 remote_addr=10.244.0.0 time_ms=213 duration=213.654982ms size=106 referer=https://grafana.homelab.com/connections/datasources/edit/PFD47E6011A697DC0 handler=/api/datasources/uid/:uid/health status_source=server

Has anyone had a similar situation?
I’d really appreciate it if you could help me.

Best regards!

[tonyswumac]

Can you post a screenshot of your datasource configuration for Loki?

[mdcravero]

Hi Tony,
sure!

I also enclose the configuration in my Gragana configMap

    datasources:
      datasources.yaml: 
        apiVersion: 1
        datasources:
          - name: loki-home
            type: loki
            access: proxi
            url: http://loki-stack:3100
            isDefault: true

My services

[tonyswumac]

Interesting, and you were able to send request from your grafana pod to loki, so it’s not connectivity.

I am not quite sure by looking at this. Can you try an actual API call from inside grafana pod to loki endpoint and see if it returns anything?

[mdcravero]

It’s really strange because it returns information without any problem.

[mdcravero]

Hi! finally I found the problem. It was the Loki version .
I had installed version 2.6.1, and in 2.9.3 this problem was fixed.
Thank you for the help!
Kind regards