/kubernetes-logging-loki-stack

Kubernetes logging with Loki and Grafana

  • Grafana loki is a log aggregation tool that used to store and query logs.
  • Designed to be cost effective and easy to operate
  • Loki does not index full text from logs(like elasticsearch)
  • Loki only indexes labels(metadata) from logs.
  • Make it more cost effective and performant.
  • Configuration and query language similar to prometheus.
helm repo add grafana https://grafana.github.io/helm-charts
helm repo update
helm search repo loki
helm show values grafana/loki-stack > values.yaml
helm install --values values.yaml loki grafana/loki-stack

kubectl get secrets
kubectl describe secrets loki-grafana
kubectl get secrets loki-grafana -o jsonpath="{.data.admin-pasword}" | base64 --decode

Viewing kubernetes logs

  • Login to grafana dashboards
  • add datasource as Loki
  • expore
  • label_filter for example: pod=etcd-minikube

To view config for promtail

kubectl get secret loki-prometheus -o jsonpath="{.data.promtail.yaml}" | base64 --decode