Example of Loki Stack in K8S cluster

Example

• the kubernetes cluster with configured persistent volumes and ingress-controller
• kubectl (installation guide is here), helm (installation guide is here)
• example domain grafana.example.com

Namespace

Create the monitoring namespace

kubectl create namespace monitoring

Loki stack

Add and update Loki helm chart repository

helm repo add loki https://grafana.github.io/loki/charts
helm repo update

Install Loki stack

helm install loki loki/loki-stack --namespace monitoring -f loki.values.yaml

Grafana

Add and update Grafana helm chart repository

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

Install Grafana

helm install grafana grafana/grafana --namespace monitoring -f grafana.values.yaml

Get admin password

kubectl get secret --namespace monitoring grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo

Deploy Grafana ingress

kubectl apply -f ingress.yaml

Add ingress IP address to /etc/hosts for grafana.example.com

Check out web interface in browser. Sign in with user admin and password.

Create new dashboard and panel. Our Loki datasource is available and it is the default datasource.

Set log labels with value container="grafana" (it is an example, you can try any other meta label app, namespace, etc), set visualization type Logs.