Alertmanager

Checks Prometheus AlertManager for any firing alerts.

The following example transforms the list of alerts so that each alert becomes a single check result. Without the transform the health check will fail if any alerts are firing.

alert-manager-check.yaml
apiVersion: canaries.flanksource.com/v1
kind: Canary
metadata:
  name: alertmanager-check
spec:
  schedule: "*/5 * * * *"
  alertmanager:
    - url: alertmanager.monitoring.svc
      alerts:
        - .*
      ignore:
        - KubeScheduler.*
        - Watchdog
      transform:
        expr: |
          results.alerts.map(r, {
            'name': r.name + r.fingerprint,
            'namespace': 'namespace' in r.labels ? r.labels.namespace : '',
            'labels': r.labels,
            'icon': 'alert',
            'message': r.message,
            'description': r.message,
          }).toJSON()

Field	Description	Scheme	Required
`alerts`	A list of alert prefix names to include	`[]string`
`ignore`	A list of alert prefix names to exclude	`[]string`
`filters`	A map of label to value prefixes to find alerts on	`map[string]string`
`name`	Name of the check, must be unique within the canary	`string`	Yes
`description`	Description for the check	`string`
`icon`	Icon for overwriting default icon on the dashboard	`string`
`labels`	Labels for check	`map[string]string`
`test`	Evaluate whether a check is healthy	`Expression`
`display`	Expression to change the formatting of the display	`Expression`
`transform`	Transform data from a check into multiple individual checks	`Expression`
`metrics`	Metrics to export from	`[]Metrics`