kubernetes-yaml/learn/learn-kubernetes-master/kiamol/ch14/lab/README.md

Ch14 lab

Setup

Deploy the monitoring subsystem:

kubectl apply -f lab/monitoring/

Browse to the Prometheus UI - there are no targets

Sample Solution

This is the background info:

• Prometheus is configured to find targets in the namespace kiamol-ch14-lab

• all exporters are listed on the Prometheus docs

• the Elasticsearch exporter exposes metrics on port 9114.

My solution is in elasticsearch.yaml.

Create the namespace and deploy the app:

kubectl create ns kiamol-ch14-lab

kubectl apply -f lab/elasticsearch.yml -n kiamol-ch14-lab

Back in Prometheus you'll see the target added, with about 300 new metrics

elasticsearch_cluster_health_up is the most basic, it should return 1 and show the version info in the labels:

Teardown

Remove the namespaces and that removes everything:

kubectl delete ns kiamol-ch14-lab

kubectl delete ns kiamol-ch14-lab-monitoring