kubern-everything/prometheus-stack/README.md

https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack#configuration

helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update

Use for helm values: https://github.com/cablespaghetti/k3s-monitoring/blob/master/kube-prometheus-stack-values.yaml

helm upgrade --install prometheus prometheus-community/kube-prometheus-stack \
 --create-namespace \ 
 --namespace monitoring \ 
 --values kube-prometheus-stack-values.yaml

Accessing UIs via PortForwarding

kubectl port-forward svc/prometheus-grafana 8080:80 -n monitoring
kubectl port-forward svc/prometheus-kube-prometheus-prometheus 9090 -n monitoring
kubectl port-forward svc/prometheus-kube-prometheus-alertmanager 9093 -n monitoring

This will make Grafana accessible on http://localhost:8080, Prometheus on http://localhost:9090 and Alert Manager on http://localhost:9093

Login for Grafana: User: admin Pwd: prom-operator