KB045245 – Configuring Alertmanager to send Emails

Last modified: April 9, 2021
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KB045245 – Configuring Alert Manager to send Emails

Scope/Description:

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

Prerequisites:

  • 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

Steps:

  • Log in to the ansible admin node and edit “/etc/alertmanager/alertmanager.yml”
[root@osd1 ~]# vim /etc/alertmanager/alertmanager.yml
global:
  resolve_timeout: 5m

  smtp_smarthost: 'emailserverhostname:port'

  smtp_from: 'fromemail@example.com'

  smtp_require_tls: false

route:
  group_by: ['alertname']
  group_wait: 10s
  group_interval: 10s
  repeat_interval: 1h
  receiver: 'ceph-dashboard'
receivers:
- name: 'ceph-dashboard'
  webhook_configs:
  - url: 'http://osd1:8443/api/prometheus_receiver'
  - url: 'http://osd2:8443/api/prometheus_receiver'
  - url: 'http://osd3:8443/api/prometheus_receiver'
  - url: 'http://osd4:8443/api/prometheus_receiver'
  email_configs:
   - to: 'exampleaddress@example.com'

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

Verification:

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

Troubleshooting:

  • 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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