I can't get a custom script to run as a notification

Troubleshooting
,
1

CMK version: 2.3.0
OS version: Ubuntu 22.04.5 LTS + Docker version 28.0.1

Hi!

I come from Nagios and wanted to migrate everything to checkmk, both at home and at work, but I’m having a problem with Telegram notifications.

I run checkmk in a Docker container with this configuration:

services:
  checkmk:
    image: checkmk/check-mk-raw:2.3.0-latest
    container_name: checkmk
    ports:
      - "8888:5000"
      - "8000:8000"
    volumes:
      - ./monitoring:/omd/sites
      - /etc/localtime:/etc/localtime:ro
    tmpfs:
      - /opt/omd/sites/cmk/tmp:uid=1000,gid=1000
    restart: unless-stopped
    tty: true
    stdin_open: true

I created a .sh script in cmk/local/share/check_mk/notifications/telegram_notification.sh and it appears in the list to create a new notification. The content of the script doesn’t matter because it never runs. I’ve tried curl, touch, echo > file, etc.

All file permissions and ownership are correct, and if I run the script from within the container with the cmk user it runs without problems.

I have created the new notification as you can see in the screenshot.

image
image959×922 124 KB

Now I hit “test notifications” and get this:

image
image1635×503 96.3 KB

I have also tried from “fake check results” in several services, and the script does not run either.

notify.log:

image
image1919×248 120 KB

What else could I review?

Thank you very much in advance.

2

Here you also only see a test of the notification rules. How does it look like with a real notification? You said that you tried a fake check result and this was also not working. With fake check result you need to consider the needed checks until you reach a hard state for the notification.

All the other settings should be correct.

3

Thanks for the reply. Now the script is running with real events, so I probably still don’t quite understand how checkmk works.