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README.md

How to Install Prometheus on Kubernetes Cluster?

YouTube Tutorial

Steps

0. Create EKS Cluster (Optional)

eksctl create cluster -f eks.yaml

1. Deploy Prometheus Stack Helm Chart

  • Download prometheus-values.yaml file for Prometheus from here
  • Update following variables
etcd: false # line 37 kubeScheduler: false # line 53 adminPassword: test123 # line 628 kubeControllerManager: # line 910 enabled: false kubeEtcd: # line 1057 enabled: false kubeScheduler: # line 1122 enabled: false serviceMonitorSelector: # line 2050 matchLabels: prometheus: devops commonLabels: # line 27 prometheus: devops
helm repo add prometheus-community \ https://prometheus-community.github.io/helm-charts
helm repo update
helm search repo kube-prometheus-stack --max-col-width 23
helm install monitoring \ prometheus-community/kube-prometheus-stack \ --values prometheus-values.yaml \ --version 16.10.0 \ --namespace monitoring \ --create-namespace
kubectl get pods -n monitoring
kubectl get svc -n monitoring 
kubectl port-forward \ svc/monitoring-kube-prometheus-prometheus 9090 \ -n monitoring
  • Go to http://localhost:9090 and select targets
kubectl get cm kube-proxy-config -n kube-system -o yaml
kubectl -n kube-system get cm kube-proxy-config -o yaml |sed 's/metricsBindAddress: 127.0.0.1:10249/metricsBindAddress: 0.0.0.0:10249/' | kubectl apply -f -
watch -n 1 -t kubectl get pods -n kube-system
kubectl -n kube-system patch ds kube-proxy -p "{\"spec\":{\"template\":{\"metadata\":{\"labels\":{\"updateTime\":\"`date +'%s'`\"}}}}}"

  • Go back to http://localhost:9090 under targets and alerts

  • Wait 20-30 min to get more data in Prometheus

kubectl port-forward \ svc/monitoring-grafana 3000:80 \ -n monitoring
  • Open following dashboards
    • Kubernetes / Compute Resources / Cluster
    • Kubernetes / Kubelet
    • USE Method / Cluster

2. Deploy Postgres Helm Chart

helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo update
helm search repo postgresql --max-col-width 23

  • Download postgres-values.yaml file for Postgres from here

  • Update following variables

postgresqlDatabase: test # line 155 metrics: # line 734 enabled: true serviceMonitor: # line 744 enabled: false additionalLabels: prometheus: devops
helm install postgres \ bitnami/postgresql \ --values postgres-values.yaml \ --version 10.5.0 \ --namespace db \ --create-namespace
kubectl get pods -n db

3. Create Service Monitor for Postgres

  • Create service-monitor.yaml
--- # https://github.com/prometheus-operator/prometheus-operator apiVersion: monitoring.coreos.com/v1 kind: ServiceMonitor metadata: name: postgres-postgresql namespace: db labels: <labels> spec: endpoints: - port: <port> interval: 60s scrapeTimeout: 30s namespaceSelector: matchNames: - <namespace> selector: matchLabels: <labels>
kubectl get prometheus \ monitoring-kube-prometheus-prometheus \ -o yaml \ -n monitoring
kubectl get endpoints -n db
kubectl get services -n db
kubectl describe endpoints postgres-postgresql-metrics -n db
kubectl apply -f service-monitor.yaml
  • Import Grafana dashboard 9628

Clean Up

helm repo remove prometheus-community bitnami helm uninstall monitoring -n monitoring helm uninstall postgres -n db kubectl delete crd alertmanagerconfigs.monitoring.coreos.com kubectl delete crd alertmanagers.monitoring.coreos.com kubectl delete crd podmonitors.monitoring.coreos.com kubectl delete crd probes.monitoring.coreos.com kubectl delete crd prometheuses.monitoring.coreos.com kubectl delete crd prometheusrules.monitoring.coreos.com kubectl delete crd servicemonitors.monitoring.coreos.com kubectl delete crd thanosrulers.monitoring.coreos.com
eksctl delete cluster -f eks.yaml