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KB450245 – Configuring Alertmanager to send Emails

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  • This article will show proper syntax in order to allow emails to be sent from alert manager


  • A running Ceph Cluster with the ceph dashboard configured with ceph-ansible
  • Access to the cluster ansible-admin node
  • An email address, mail server name and port you wish to send the alerts to


  • Log in to the ansible admin node and edit “/etc/alertmanager/alertmanager.yml”
[root@osd1 ~]# vim /etc/alertmanager/alertmanager.yml
  resolve_timeout: 5m
  smtp_smarthost: emailserverhostname:port
  smtp_from: ''
  smtp_require_tls: true
  smtp_auth_username: ''
  smtp_auth_password: ''
  group_by: ['alertname']
  group_wait: 10s
  group_interval: 10s
  repeat_interval: 1h
  receiver: 'ceph-dashboard'
- name: 'ceph-dashboard'
  - url: 'http://hostname:8443/api/prometheus_receiver'
  - url: 'http://hostname:8443/api/prometheus_receiver'
  - url: 'http://hostname:8443/api/prometheus_receiver'
  - url: 'http://hostname:8443/api/prometheus_receiver'
   - to: ''

  • Restart the alert manager service:
[root@osd1 ~]# systemctl restart alertmanager


  • Check the status of alert manager to ensure the service is running:
[root@osd1 ~]# systemctl status alertmanager


  • If the alert manager service is failing you can check the logs for alert manager:
[root@osd1 ~]# docker logs alertmanager
  • Pay close attention to syntax in the alertmanager.yml file. It is very common for the service to fail due to a syntax error.
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