Downtime Notifications Not Rendered in HTML Template (Checkmk 2.4.0p7)

Troubleshooting
,
1

CMK version:
Checkmk 2.4.0p7

OS version:
Checkmk Virtual Appliance 1.7.10

Error message:
No error message, but downtime notifications are rendered in plain text instead of using the new HTML template. Other notifications (e.g., service alerts) are rendered correctly in HTML.

Description of the issue:
I am using a single notification rule for all events without any custom adjustments. While most notifications are rendered correctly using the new HTML template, downtime notifications fall back to plain text formatting, making them harder to read.

Steps to reproduce:

  1. Configure a single notification rule for all events.
  2. Trigger a downtime notification.
  3. Observe that the downtime notification is rendered in plain text, while other notifications (e.g., service alerts) are rendered in HTML.

Screenshots:

Debug output:
I have not yet enabled debug logging, but I can provide logs if needed.

Question:
Is this a known issue with Checkmk 2.4.0p7 or the virtual appliance? Could this be a bug or a missing implementation in the new HTML template for downtime notifications?

2

I would think your downtime notification is a fallback notification and not generated from your normal notification rules.
Is in your system a fallback notification mail address set?

2 Likes
3

Hi Andreas,

Thank you for your quick response.

You were absolutely right, the issue was caused by a fallback notification mail being set in the system. After setting all Notifications for HTML Mail, downtime notifications are now rendered correctly using the HTML template, just like the other notifications.

I appreciate your help in pinpointing the cause of the problem.

Best regards,
Paul