Monitoring architecture

This section provides an overview of the Greenhouse monitoring components.

Monitoring components

1. Metrics

   The kube-monitoring plugin is intended for monitoring remote Kubernetes clusters and is preconfigured to collect metrics from all Kubernetes components. It also comes with a default set of Kubernetes alerting rules. The plugin includes Prometheus, Prometheus operator, Prometheus node exporter and kube-state-metrics. The plugin is provided in its own namespace, which is managed by Greenhouse. Prometheus and Prometheus operator configurations can also be extended to process customer metrics and alerts.

2. Visualization/Dashboard

   With the plutono plugin, you can deploy Plutono, a fork of Grafana 7.5.17 in the Greenhouse central cluster, to query Prometheus metrics and visualize them in dynamic dashboards.

3. Alerts

   The alerts plugin contains the Prometheus Alertmanager and Supernova as user interface. It is deployed in the Greenhouse central cluster in the customer org namespace. The Alertmanager receives alerts from the Prometheis in the remote Kubernetes clusters.
   Supernova is a user-friendly interface for the Alertmanager. It provides a grouped overview of the alerts with additional simple filter options.

4. Notifications

   The Alertmanager can send out notifications to different receivers (e.g. Slack, Email, …) based on alert labels.

The Greenhouse monitoring components and their interactions are illustrated below.