prometheus alertreceiver webhook2mail

Openshift alert receivers can only be managed by cluster admins in the secret alertmanager-main in the namespace openshift-monitoring.
paw2mail is a webservice that accepts alerts and sends them to an email address.

deprecated

So alert routing for user-defined is in Technology Preview.

In OpenShift Container Platform 4.10, a cluster administrator can enable alert routing for user-defined projects.

from enabling-alert-routing-for-user-defined-projects

So paw2mail is not needed anymore.

config

The receiver email adress is defined in label paw2mail:

apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: foo
spec:
  groups:
    - name: bar
      rules:
        - alert: foobar_is_bigger_42
          expr: 'example_count_total{item_type="/count"} > 42'
          labels:
            severity: Info
            paw2mail: jon@example.net

Setup

Needed environments

export smtp_from=cluster@example.net
export smtp_host=mail.example.net
export smtp_port=25

Optional

export smtp_user=clustermailer
export smtp_pass=xxxxxxxxxxxxx