Architecture

High-level

From a high-level perspective, KOF consists of three layers:

• the Collection layer, where the statistics and events are gathered,
• the Regional layer, which includes storage to keep track of those statistics and events,
• and the Management layer, where you interact through the UI.

flowchart TD;
    A[Management UI, promxy] 
    A --> C[Storage Region 1]
    A --> D[Storage Region 2]
    C --> E[Collect Child 1]
    C --> F[Collect Child 2]
    D ==> G[...]

Mid-level

Getting a little bit more detailed, it's important to undrestand that data flows upwards, from observed objects to centralized Grafana on the Management layer:

Management Cluster

kof-mothership chart

grafana-operator

victoria-metrics-operator

cluster-api-visualizer

sveltos-dashboard

k0rdent service templates

promxy

kof-operators chart

opentelemetry-operator

prometheus-operator-crds

Cloud 1..N

Region 1..M

Regional Cluster

kof-storage chart

grafana-operator

victoria-metrics-operator

victoria-logs-single

external-dns

cert-manager of grafana and vmauth

ingress-nginx

Child Cluster 1

cert-manager of OTel-operator

kof-operators chart

opentelemetry-operator

OpenTelemetryCollector

prometheus-operator-crds

kof-collectors chart

opencost

kube-state-metrics

prometheus-node-exporter

observed objects

Low-level

At a low level, you can see how logs and traces work their way around the system.