Loki 1.5.0: The "loki-loki-stack" ConfigMap is not created for "loki-stack-datasource.yaml"

[k8s42]

Describe the bug
I deployed the Loki Stack (stable) using Helm 3 and Loki 1.5.0 was deployed but no ConfigMap was created for the "loki-stack-datasource.yaml" file.

To Reproduce
Steps to reproduce the behavior:

1. Add repo:
   helm3 repo add loki https://grafana.github.io/loki/charts
2. Deploy Loki Stack using Helm 3:
   helm3 --install --name=loki loki/loki-stack
3. List ConfigMaps in Loki namespace:
   kubectl get configmaps -n loki
   NAME DATA AGE
   loki-loki-stack-test 1 6m19s
   loki-promtail 1 6m19s

Expected behavior
The "loki-loki-stack" should've been created for "loki-stack-datasource.yaml".

Environment:

• Infrastructure: Kubernetes v1.15.10
• Deployment tool: Helm3
• Loki: v1.5.0

Screenshots, Promtail config, or terminal output
This was not an issue in Loki 1.4.1.

[cyriltovena]

is this a duplicate of #2186 ? Can you confirm ?

[k8s42]

is this a duplicate of #2186 ? Can you confirm ?

I do not fully understand the context of #2186. My issue is that I used to get a configmap called "loki-loki-stack" in versions lower than 1.5.0 just about a few weeks ago. In 1.5.0, the configmap "loki-loki-stack" no longer gets created.

[cyriltovena]

Yes it's exactly that.

[k8s42]

To give you a clear context on my issue:

My promtail ships logs to Loki (hosted in a different cluster). So, to get things working this way, I'd add following to these YAML files:

promtail.yaml:
url: http://loki.mydomain.com/loki/api/v1/push

loki-stack-datasource.yaml
url: http://loki.mydomain.com

Since I don't have a configmap for loki-stack-datasource.yaml in 1.5.0, I don't have url: http://loki.mydomain.com specified for promtail to send logs to.

Is there a different way to accomplish this now?