k3s-dashboard-go

links

• Prometheus - HTTP API
• Tutorial: Build a Prometheus Dashboard for K3s with Wio Terminal
• Kubernetes PromQL (Prometheus Query Language) CPU aggregation walkthrough
• Kubernetes in Production: The Ultimate Guide to Monitoring Resource Metrics with Prometheus

commands to test requests

kubectl run -i --tty alpine --image=alpine --restart=Never -- sh

# nodes:           count(kube_node_info)
# cpu:             (1-avg(rate(node_cpu_seconds_total{mode="idle", cluster=""}[5m])))*100
# memory:          (1 - sum(:node_memory_MemAvailable_bytes:sum{cluster=""}) / sum(kube_node_status_allocatable_memory_bytes{cluster=""}))*100
# pod count:       sum(kubelet_running_pods{cluster="", job="kubelet", metrics_path="/metrics"})
# container count: sum(kubelet_running_containers{cluster="", job="kubelet", metrics_path="/metrics"})
# build info:      kubernetes_build_info

curl 'http://prometheus-kube-prometheus-prometheus.prometheus.svc.cluster.local:9090/api/v1/query?query=<metric-query-urlencoded>'