machines-endpoints container

machines-endpoints is a one-shot program to create/update Kubernetes Endpoints, EndpointSlice and ConfigMap objects based on the information in sabakan on bootservers.

The Endpoints/EndpointSlice objects managed by this program are provided for Prometheus to discover services on host machines.

• The host machines listed by this program include spare machines and boot servers. Such machines are not registered in Kubernetes as Nodes, and they cannot be scraped with node role in <kubernetes_sd_config> configuration.
• Retired machines are not listed because they never provide metrics.

The ConfigMap object is provided for BMC reverse proxy to resolve BMC hostnames to IP addresses.

• The host machines listed by this program include spare machines and boot servers.
• Retired machines are also listed because we need to operate them via BMCs.

This program works in kubernetes pods.

Usage

1. Prepare dctest environment.

2. Deploy RBAC and CronJob resources for machines-endpoints.

   vi machines-endpoints.yaml  # adjust tag of container image to the latest one
   kubectl apply -n NAMESPACE -f machines-endpoints.yaml

3. Check prometheus-node-targets endpoints, bootserver-etcd-metrics endpoints, and bmc-reverse-proxy configmap.

   kubectl get endpoints -n NAMESPACE prometheus-node-targets
   kubectl get endpointslice -n NAMESPACE prometheus-node-targets
   kubectl get endpoints -n NAMESPACE bootserver-etcd-metrics
   kubectl get endpointslice -n NAMESPACE bootserver-etcd-metrics
   kubectl get configmap -n NAMESPACE bmc-reverse-proxy

Docker images

Docker images are available on ghcr.io