All of the sudden unable to send notifications to Teams Chan

[jnorie]

Hello All,
I am hoping for some assistance. For several days now, I have been unable to receive notifications into a few MS Teams channels that we use for monitoring. When this was working I was able to

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sudo tail /var/log/maillog

and see that it was sending the message to the appropriate email address for Teams. As of a few days ago, I dont even see that it's trying to send to this Teams email address.
Do any of you have any suggestions on what I can do to get this working again? I am not very well versed in linux so any help would be greatly appreciated.

[benjaminsmith]

Hi jnorie,

Thank you for joining the Nagios Community Forum. Glad to have you here.

It sounds like the Nagios process is not running. You can check this by with the following command.

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systemctl status nagios

When a notification is sent you will see an entry in both the nagios.log and the mail log. Check the nagios,log as well for outgoing notifications.

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tail -n 100 /usr/local/nagios/var/nagios.log

You should see an entry like:

[1618490021] HOST NOTIFICATION: nagiosadmin;192.168.1.1.;DOWN;xi_host_notification_handler;CRITICAL - 192.168.254.23: Host unreachable @ 192.168.23.112. rta nan, lost 10

The notification handler will be a different command for Nagios Core. If that's working, then it's likely an issue with your mail setup.

Let us know what you find out.

[mcapra]

There was a recent change with MS Teams webhooks:
https://office365itpros.com/2021/02/03/ ... bhook-url/

Connectors were supposed to be updated by April 11th. Is that around the time you started noticing this problem? If so you may just need to re-generate your webhook and update your Nagios Core event/notification handler.