DevOps with Kubernetes - Second Edition

Gathering data from Kubernetes

The steps for implementing the monitoring layers discussed previously in Prometheus are now quite clear:

1. Install the exporters
2. Annotate them with appropriate tags
3. Collect them on auto-discovered endpoints

The host layer monitoring in Prometheus is done by the node exporter (https://github.com/prometheus/node_exporter). Its Kubernetes template can be found under the examples for this chapter, and it contains one DaemonSet with a scrape annotation. Install it as follows:

$ kubectl apply -f exporters/prom-node-exporter.yml

Its corresponding target in Prometheus will be discovered and created by the pod discovery role if using the example configuration.

The container layer collector should be kubelet. Consequently, ...