production issue

[Anup Tripathi]

Hi Team,

i had alertmanger configured in my env now i have changed smtp server and now it's showing "Prometheus_Alertmanager_Notification_Failing" error. My alertmanager config is as below.

Please help what wrong i am doing

global:

smtp_smarthost: '########:587'

smtp_from: 'alertmanager@####.com'

smtp_require_tls: true

smtp_auth_username: '#######'

smtp_auth_password: '########'

[Brian Candler]

Look at alertmanager logs:  journalctl -eu alertmanager (if you are running alertmanager under systemd)

Look at the network traffic:  tcpdump -i <interface> -nn -s0 -vA tcp port 587

Could it be that your target host doesn't accept TLS?

Could it be that your target host has an invalid TLS certificate, or a cert which doesn't match the hostname in "########:587"? If you want to keep TLS but disable cert verification, then unfortunately there's no global smtp_tls_config; as far as I can see you have to set tls_config under the email_configs section of every individual receiver.

See:

https://github.com/prometheus/alertmanager/issues/1554

https://github.com/prometheus/alertmanager/pull/1528

https://prometheus.io/docs/alerting/latest/configuration/#email_config