Monitor kubernetes

kube-prometheus-stack

To monitor your Kubernetes cluster (including Knative functions and OpenEBS storage), here's a lightweight yet comprehensive setup using ​Prometheus, ​Grafana, and ​Alertmanager via the ​kube-prometheus-stack. This stack is optimized for single-node clusters and includes preconfigured dashboards/alerts.

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

config:

# monitoring-values.yaml

prometheus:
  prometheusSpec:
    storageSpec:
      volumeClaimTemplate:
        spec:
          storageClassName: openebs-hostpath
          accessModes: ["ReadWriteOnce"]
          resources:
            requests:
              storage: 5Gi
    resources:
      requests:
        memory: 512Mi
        cpu: 200m

grafana:
  adminPassword: "admin"
  persistence:
    enabled: true
    storageClassName: openebs-hostpath
    size: 5Gi

alertmanager:
  alertmanagerSpec:
    resources:
      requests:
        memory: 256Mi
        cpu: 100m

# Disable components not needed for a single-node cluster
kubeEtcd:
  enabled: false
kubeControllerManager:
  enabled: false
kubeScheduler:
  enabled: false

helm install monitoring prometheus-community/kube-prometheus-stack \
  -n monitoring --create-namespace \
  -f monitoring-values.yaml

$ kubectl get pods -n monitoring
NAME                                                     READY   STATUS            RESTARTS   AGE
alertmanager-monitoring-kube-prometheus-alertmanager-0   0/2     PodInitializing   0          21s
monitoring-grafana-7cfd668f87-mkgxj                      0/3     PodInitializing   0          35s
monitoring-kube-prometheus-operator-858d674878-pb5jh     1/1     Running           0          35s
monitoring-kube-state-metrics-6568c5bc45-jdz98           1/1     Running           0          35s
monitoring-prometheus-node-exporter-zp9zb                1/1     Running           0          35s
prometheus-monitoring-kube-prometheus-prometheus-0       0/2     PodInitializing   0          21s