Prometheus Stack

Edka deploys the kube-prometheus-stack Helm chart from the prometheus-community repo into the monitoring namespace on your own cluster. The chart installs Prometheus for metrics collection, Grafana for dashboards, Alertmanager for alert routing, and the Prometheus Operator to manage them.

What’s Included

Prometheus Server with Kubernetes service discovery, 30s scrape interval, and 15-day retention
Grafana with the chart’s default dashboards and the default Prometheus datasource pre-wired
Alertmanager for alert routing and silencing, with 120h retention
Prometheus Operator to manage Prometheus, Alertmanager, and ServiceMonitor resources
kube-state-metrics for Kubernetes object metrics
The Edka node-exporter add-on, scraped for host and OS metrics

Configuration Options

Monitoring

Kubernetes component monitoring: API server, kubelet, CoreDNS
Node metrics from the node-exporter add-on, with node dashboards and alerting rules
Workload metrics for pods, deployments, and applications via kube-state-metrics
Automatic service discovery for services and pods carrying Prometheus annotations

Alerting

Default alerting and recording rules from the chart, covering Kubernetes apps, resources, storage, and the system
Routing by severity, with critical and warning routes and inhibition rules
Slack notifications via webhook, sent to a configurable channel

Grafana

Authentication required by default, with a generated admin password
Optional read-only anonymous access
Persistent storage for dashboards and configuration across restarts

Storage

Persistent storage for Prometheus, default 20Gi, selectable up to 500Gi
Persistent storage for Grafana, 10Gi
Backed by the hcloud-volumes storage class

Required Add-ons

This app requires the following Edka add-ons:

metrics-server: For resource metrics
node-exporter: For host and OS metrics
cert-manager: For TLS certificates
letsencrypt-issuer: For the Let’s Encrypt cluster issuer

Default Rules

The chart ships default alerting and recording rules. Active rule groups include:

Kubernetes apps, resources, storage, and system
API server availability, burn rate, histogram, and SLOs
kubelet and kube-state-metrics
Node and node-exporter rules (when node metrics are enabled)
Prometheus and Prometheus Operator
Alertmanager and general rules

etcd, kube-scheduler, kube-proxy, and controller-manager rules are disabled by default.

Service Endpoints

After deployment, Edka surfaces these endpoints:

Grafana Dashboard: https://<grafana-hostname> when exposed externally
Prometheus Web UI: https://<prometheus-hostname> when exposed externally
Alertmanager UI: https://<alertmanager-hostname> when exposed externally
Internal cluster services for Grafana (:80), Prometheus (:9090), and Alertmanager (:9093) in the monitoring namespace

External exposure runs through your selected ingress class, with TLS issued by the cert-manager cluster issuer.

Deploy Prometheus Stack