Monitoring Setup

Prometheus and Grafana monitoring stack for the Kubernetes cluster.

Prerequisites

• Kubernetes cluster with Traefik Gateway API configured
• cert-manager with Let’s Encrypt ClusterIssuer
• Helm installed

Installation

# 1. Add Prometheus community Helm repo
helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update
 
# 2. Install kube-prometheus-stack
# Replace <your-password> with a secure password
helm install monitoring prometheus-community/kube-prometheus-stack \
  -n monitoring --create-namespace \
  --set grafana.adminPassword='<your-password>'
 
# 3. Create HTTPRoute for Grafana (uses wildcard cert, no per-app certificate needed)
kubectl apply -f - <<'EOF'
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: grafana
  namespace: monitoring
spec:
  parentRefs:
    - name: traefik-gateway
      namespace: traefik
      sectionName: https  # Uses wildcard listener
  hostnames:
    - grafana.app.domain.no
  rules:
    - backendRefs:
        - name: monitoring-grafana
          port: 80
EOF

Access

• Grafana: https://grafana.app.domain.no 
  • Username: admin
  • Password: (set during installation)

Included Components

The kube-prometheus-stack includes:

• Prometheus: Metrics collection and storage
• Grafana: Visualization and dashboards
• Alertmanager: Alert routing and notifications
• Node Exporter: Host-level metrics
• kube-state-metrics: Kubernetes object metrics

Pre-configured Dashboards

Grafana comes with dashboards for:

• Kubernetes cluster overview
• Node resources (CPU, memory, disk, network)
• Pod resources
• Namespace resources
• Persistent volumes
• API server metrics

Adding Custom Dashboards

Import dashboards from Grafana.com :

1. Go to Grafana → Dashboards → Import
2. Enter dashboard ID (e.g., 15757 for Kubernetes views)
3. Select Prometheus data source
4. Click Import

Alerting (Optional)

Configure Alertmanager for notifications:

kubectl edit secret alertmanager-monitoring-kube-prometheus-alertmanager -n monitoring

Add Slack, email, or other notification channels in the alertmanager.yaml config.