Alerts

View active alert definitions

Prometheus shows the currently loaded alert definitions. Open WKP UI in your browser and:

1. Click the Prometheus button in the list of cluster components

2. Click Alerts in the Prometheus navigation bar

3. The list of loaded alert defintions is displayed

Adding new alerts

Some example alerts are included in the cluster/manifests folder of your config repo. To create a new alert:

1. Open the example-alerts.yaml file in cluster/manifests
2. Uncomment the contents of the file.
3. Modify and add new alert definitions to the file. (See additional resources for more detailed information about Alertmanager's alert format and options.)
4. git commit and git push the changes to your config repoistory.

Flux will detect the change and add the new alerts into the cluster. Check that the new alert has been loaded by following view active alert definitions above.

Additional resources

• The prometheus alerting rule documentation describes alert definitions and their options in more detail.
• The prometheus operator alerting documentation describes the PrometheusRule CRD that we use to load the alert definitions.

Example alert

Here is one of the example alerts that will fire continuously, helping you check everything is working.

apiVersion: monitoring.coreos.com/v1

kind: PrometheusRule

metadata:

creationTimestamp: null

labels:

prometheus: example

role: alert-rules

name: prometheus-example-rules

spec:

groups:

- name: ./example.rules

rules:

# This alert will always fire and is good to quickly test that things are working.

- alert: ExampleAlert

expr: vector(1)