added pfd

check_this

@@ -27,3 +27,5 @@ https://grpc.io/docs/languages/python/basics/
 git clone https://github.com/scriptcamp/kubernetes-postgresql.git
 
 https://devopscube.com/deploy-postgresql-statefulset/
+
+https://operatorhub.io/

k8s/monitoring

@@ -0,0 +1,87 @@
+Monitoring
+Prometheus
+
+mkdir ~/monitoring && cd ~/monitoring
+
+helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
+helm repo update
+
+helm upgrade --install --namespace monitoring \
+  --create-namespace \
+  prometheus prometheus-community/prometheus
+
+# cloud instance
+IP4=$(/sbin/ip -o -4 addr list eth0 | awk '{print $4}' | cut -d/ -f1)
+# notebook
+IP4=$(/sbin/ip -o -4 addr list br2 | awk '{print $4}' | cut -d/ -f1)
+  
+export POD_NAME=$(kubectl get pods --namespace monitoring -l "app=prometheus,component=server" -o jsonpath="{.items[0].metadata.name}")
+kubectl --namespace monitoring port-forward --address $IP4 $POD_NAME 9090 &
+
+  
+
+Add Alert Rules to prometheus
+
+cat >values.yaml <<EOF
+serverFiles:
+  ## Alerts configuration
+  ## Ref: https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/
+  alerting_rules.yml: 
+    groups:
+      - name: Instances
+        rules:
+          - alert: InstanceDown
+            expr: up == 0
+            for: 5m
+            labels:
+              severity: page
+            annotations:
+              description: '{{ \$labels.instance }} of job {{ \$labels.job }} has been down for more than 5 minutes.'
+              summary: 'Instance {{ \$labels.instance }} down'
+EOF
+helm upgrade --install --namespace monitoring \
+  --create-namespace \
+  prometheus prometheus-community/prometheus \
+  --values values.yaml
+
+    Review Alerts at Prometheus UI later at grafana
+
+Grafana
+
+    https://github.com/grafana/helm-charts/tree/main/charts/grafana
+
+helm repo add grafana https://grafana.github.io/helm-charts
+helm repo update
+helm upgrade --install --namespace monitoring --create-namespace grafana grafana/grafana
+
+kubectl get secret --namespace monitoring grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo
+export POD_NAME=$(kubectl get pods --namespace monitoring -l "app.kubernetes.io/name=grafana,app.kubernetes.io/instance=grafana" -o jsonpath="{.items[0].metadata.name}")
+kubectl --namespace monitoring port-forward $POD_NAME --address=$IP4 3000 &
+
+    create prometheus datasoruce http://prometheus-server:80
+    Import K3s nodeexporter dashboard
+        .https://grafana.com/grafana/dashboards/15282-k8s-rke-cluster-monitoring/
+
+Loki
+
+#helm repo add grafana https://grafana.github.io/helm-charts
+#helm repo update
+helm upgrade --install loki --namespace=monitoring --create-namespace grafana/loki-stack
+
+    Add Loki Datasource http://loki:3100
+    Loki Dashboard
+        https://grafana.com/grafana/dashboards/12019-loki-dashboard-quick-search/
+
+kube prometheus stack
+
+helm upgrade --install --namespace monitoring \
+   --create-namespace \
+   prometheus prometheus-community/kube-prometheus-stack
+IP4=$(/sbin/ip -o -4 addr list eth0 | awk '{print $4}' | cut -d/ -f1)
+kubectl -n monitoring port-forward prometheus-prometheus-kube-prometheus-prometheus-0 --address $IP4 9090:9090  &
+
+kubectl -n monitoring port-forward prometheus-grafana-689f7dbb7-k69kx --address $IP4 3000:3000  &
+
+kubectl -n monitoring get secret prometheus-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo
+prom-operator
+