server/monitoring/alertmanager.yaml

apiVersion: monitoring.coreos.com/v1
kind: Alertmanager
metadata:
  name: alertmanager
  namespace: monitoring
spec:
  replicas: 1
  alertmanagerConfiguration:
    name: alertmanagerconfig-ntfy-webhook
  storage:
    volumeClaimTemplate:
      apiVersion: v1
      kind: PersistentVolumeClaim
      spec:
        accessModes:
        - ReadWriteOnce
        resources:
          requests:
            storage: 10Mi
        storageClassName: ceph-block-ssd