prometheus for cluster monitoring; loki-stack for log correlation

README.md

@@ -23,6 +23,8 @@
   * [Deploying a LE-certificate with ingress](#cert-manager-ingress)
   * [Deploying a LE-certificate by CRD](#cert-manager-crd)
   * [Troubleshooting](#cert-manager-troubleshooting)
+* [Cluster monitoring with Prometheus/Grafana](#prometheus-grafana)
+* [Log correlation with Loki-stack/Grafana](#loki-stack)
 * [HELM charts](#helm)
   * [Create a chart](#helm-create)
   * [Install local chart without packaging](#helm-install-without-packaging)
@@ -557,6 +559,30 @@ After successfull setup perform a TLS-test:
 * https://testssl.sh/ (`apt install testssl.sh`)
 * https://www.ssllabs.com/ssltest/index.html
 
+# Cluster monitoring with Prometheus/Grafana <a name="user-content-prometheus-grafana"></a>
+```
+helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
+helm repo update
+kubectl create ns prom
+helm install --namespace prom -f values.yaml prom-stack prometheus-community/kube-prometheus-stack
+
+# access web ui at http://localhost:8080 OR configure an ingress instance
+kubectl -n prom port-forward service/prom-stack-grafana 8080:80
+```
+
+# Log correlation with Loki-stack/Grafana <a name="user-content-loki-stack"></a>
+Docs: https://github.com/grafana/helm-charts/tree/main/charts/loki-stack
+```
+helm repo add grafana https://grafana.github.io/helm-charts
+helm repo update
+kubectl create ns loki-stack
+helm upgrade --install loki --namespace=loki-stack grafana/loki-stack --set grafana.enabled=true
+
+# access web ui at http://localhost:8888 OR configure an ingress instance
+kubectl get secret -n loki-stack loki-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo
+kubectl -n loki-stack port-forward service/loki-grafana 8888:80
+```
+
 # HELM charts <a name="user-content-helm"></a>
 Docs:
 * https://helm.sh/docs/intro/using_helm/