4. Prometheus exporters on IT-CNE Cloud-Native Core

4.1 Tasks: Blackbox exporter

Mon, 01 Jan 0001 00:00:00 +0000

Task 4.1.1: Install Blackbox exporter

Similar to the basic setup, we are just going to update our configuration of the ArgoCD application to install the Blackbox exporter. Update your monitoring application (charts/user-monitoring/values.yaml) and update the blackboxexporter.enabled flag to true:

charts/user-monitoring/values.yaml:

user: <user> # Replace me
# prometheus
prometheus:
  enabled: true
# thanos-query
query:
  enabled: true
# grafana
grafana:
  enabled: true
  datasources:
  - name: prometheus
    access: proxy
    editable: false
    type: prometheus
    url: http://prometheus-operated:9090
# blackboxexporter
blackboxexporter:
  enabled: true
# pushgateway
pushgateway:
  enabled: false
# alertmanager
alertmanager:
  enabled: false
# thanos-ruler
ruler:
  enabled: false

Commit and push the changes.

4.2 Tasks: Pushgateway

Mon, 01 Jan 0001 00:00:00 +0000

Task 4.2.1 - Install and configure Pushgateway

Update your monitoring application (charts/user-monitoring/values.yaml) and update the blackboxexporter.enabled flag to true:

charts/user-monitoring/values.yaml:

user: <user> # Replace me
# prometheus
prometheus:
  enabled: true
# thanos-query
query:
  enabled: true
# grafana
grafana:
  enabled: true
  datasources:
  - name: prometheus
    access: proxy
    editable: false
    type: prometheus
    url: http://prometheus-operated:9090
# blackboxexporter
blackboxexporter:
  enabled: true
# pushgateway
pushgateway:
  enabled: true
# alertmanager
alertmanager:
  enabled: false
# thanos-ruler
ruler:
  enabled: false

Commit and push the changes and verify whether the deployment worked correctly.

4.3 Tasks: Exporter as a sidecar

Mon, 01 Jan 0001 00:00:00 +0000

Task 4.3.1: Deploy a database and use a sidecar container to expose metric

As we’ve learned in Lab 4 - Prometheus exporters when applications do not expose metrics in the Prometheus format, there are a lot of exporters available to convert metrics into the correct format. In Kubernetes this is often done by deploying so called sidecar containers along with the actual application.

This lab demonstrates that with a mariadb database. In the first step, we are going to install a plain mariadb with a Secret (username password to access the database), a Service and the Deployment.