componentstatuses-exporter

Simple app which polls kubernetes component statuses over API and exports them them via HTTP for Prometheus consumption

Can be usefull for monitoring k8s components statuses on managed solutitions like AWS EKS.

Installation

helm repo add componentstatuses-exporter https://raw.githubusercontent.com/yuriipolishchuk/componentstatuses-exporter/master/helm/
helm repo update
helm install componentstatuses-exporter/componentstatuses-exporter

Results

export POD_NAME=$(kubectl get pods --namespace core -l "app=componentstatuses-exporter,release=k8s-statuses" -o jsonpath="{.items[0].metadata.name}")

kubectl port-forward $POD_NAME 8080:8080 &
Forwarding from 127.0.0.1:8080 -> 8080
Handling connection for 8080

http localhost:8080/metrics | grep kube
Handling connection for 8080
# HELP kube_componentstatuses Kubernetes component status health
# TYPE kube_componentstatuses gauge
kube_componentstatuses{component="controller-manager"} 1
kube_componentstatuses{component="etcd-0"} 1
kube_componentstatuses{component="scheduler"} 1

RBAC

Helm chart installs ServiceAccount, ClusterRole and ClusterRoleBinding to allow pod quering k8s api/componentstatuses

Prometheus

coreos prometheus operator ServiceMonitor can be deployed or metrics scraping can be configured via pod annotations.

To configure follow instructions in values.yaml