Alertmanager prometheus, It doesn't sent mail alert

Question

First, I configure postfix null-client on server. It can send mail successfull I configure Alertmanager:

notification_config {
    name: "alert_test"
    email_config {
        email: "abc@gmail.com"
    }
}
aggregation_rule {
  repeat_rate_seconds: 3600
  notification_config_name: "alert_test"
}

And run command:

./alertmanager -notification.smtp.smarthost :25 -config.file alertmanager.conf

It display notice:

ERRO[0002] Error sending email notification: starttls failed: tls: either ServerName or InsecureSkipVerify must be specified in the tls.Config  file=notifier.go line=758

Can you help me to fix its?

score 3 · Answer 1 · edited Aug 09 '17 at 03:33

3

It looks like you're running into X.509 validation issues.

Disable the TLS requirement, which is turned on by default.

# The default SMTP TLS requirement.
[ smtp_require_tls: <bool> | default = true ]

edited Aug 09 '17 at 03:33

Nathan Tuggy

2,237
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answered Aug 09 '17 at 03:16

Christian Will

1,529
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This works for me on Kube-Prometheus stack : https://stackoverflow.com/questions/76677571/alertmanagerconfig-not-sending-alerts-to-email-receiver/76748834#76748834 – Golide Jul 23 '23 at 14:46

score 0 · Answer 2 · answered Dec 10 '15 at 15:13

0

Try setting the -notification.smtp.smarthost flag to localhost:25. The hostname is not inferred in this case.

answered Dec 10 '15 at 15:13

fabxc

66
2

I try, but it display "starttsl failed: x509" – annt Dec 10 '15 at 15:43

score 0 · Answer 3 · answered Dec 11 '15 at 05:00

After, I configure Postfix null-client and have account root@abc.com, I use this account to send mail successfull. When I use together with alermanager prometheus, and use command:

./alertmanager -notification.smtp.smarthost 127.0.0.1:25 -config.file alertmanager.conf

I don't receive mail alert and it has notice:

> ERRO[0001] Error sending email notification: starttls failed: x509:cannot validate certificate for 127.0.0.1 because it doesn't contain any IP SANs file=notifier.go line=761

How to fix error, thanks!

Alertmanager prometheus, It doesn't sent mail alert

3 Answers3