Alert Sound - Grafana v9.5.1

[brun0]

Hello everyone, how are you?

I would like some help from you regarding a problem I am trying to resolve. I am implementing the alert system to monitor grafana, but I would need to include the alert with a sound effect. While searching the forum I came across the following post:

Sound alerts on Grafana 9

Hello! I know grafana doesnt support sound alerts, I saw an script here in the forum, but doesnt work for me in the 9 lastest version of grafana. Does any here knows any 3rd party app to make it work? We have a tv with our panels but not always are looking at the screen, so we need a simple sound for the alerts so we can check what its happening. Hope anyone can helpme. thanks for any info!

I followed her step by step, but the sound is not coming out.

First of all, I would like to warn you that I’m not very familiar with webhook and Node-RED, I’m new to the subject and I’m gradually evolving.

Below is the flow model that I created in Node-RED, I configured the HTML (post) and read file nodes (Path from folder to the sound file). Remembering that Node-red is on top of a Linux server (Centos7) and Grafana is on top of another server, they are not on the same server.

Below is the structure set up in Node-RED:

prnt.sc/ YDH_s3pIgsNN

Grafana:

prnt.sc/ osRu0N3Oeo8p
prnt.sc/ 5vQ2ecPcdscV

The notification is being redirected to the correct place:

prnt.sc/ E_Sj6YqxX_LO

Debug Node-RED:

prnt.sc/ KpHH7yHEoJwv

That said, when the alert is generated in grafana the sound effect is not made. Can you tell me if there is any configuration missing on NODE-RED or Grafana that needs to be done? Thanks in advance.

[grant2]

Welcome @brun0 to the Grafana forum.

I cannot view your screenshots. Please post them as images to this thread.

Is this the flow you are trying to create?

Remember that the above flow should run on a PC that has a soundcard installed or is hooked up to a speaker, etc. The PC where Grafana is running will NOT play the sound. The PC where the above flow resides is the one that will generate the audio alert.

[brun0]

Hi, thanks for the welcome @grant2!

The print links are not opening because I needed to put “Space” between the URL, as it is not possible to place more than two links in the same topic.

Below are the images:

Below is the structure set up in Node-RED:

Grafana:

The notification is being redirected to the correct place:

Debug Node-RED:

In relation to what you commented, the current structure is as follows:

Grafana is on a Linux server (Ubuntu)
Node-RED is on a Linux server (Centos 7)

Therefore, will it not be possible for the audio to be reproduced?

[grant2]

What about your webhook screen? In my example, it says LenovoLinux, but in yours it would be the LinuxCentos7.

[brun0]

Follow the informations:

http in:

Change:

File:

Audio out:

Http response:

[grant2]

Hi @brun0

Your change node should be as follows:

Also, your Audio Out node looks like it might be missing some settings? Perhaps try something in there as well?

[grant2]

I went ahead and re-created the flow from Oct 2022 and tested it. It works fine and am posting it here:

[{"id":"b2d9e3976ee226d3","type":"tab","label":"Flow 1","disabled":false,"info":"","env":[]},{"id":"d8b323fb13f5550c","type":"http in","z":"b2d9e3976ee226d3","name":"","url":"/hello","method":"post","upload":false,"swaggerDoc":"","x":290,"y":120,"wires":[["25dc1bd898c8e90c","f997e540947e047b"]]},{"id":"25dc1bd898c8e90c","type":"http response","z":"b2d9e3976ee226d3","name":"","statusCode":"","headers":{},"x":1110,"y":120,"wires":[]},{"id":"f997e540947e047b","type":"change","z":"b2d9e3976ee226d3","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"payload.status","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":500,"y":180,"wires":[["cec42cc5597ed9f3"]]},{"id":"984d401542f7884e","type":"play audio","z":"b2d9e3976ee226d3","name":"","voice":"","x":1050,"y":180,"wires":[]},{"id":"cec42cc5597ed9f3","type":"file in","z":"b2d9e3976ee226d3","name":"","filename":"/home/grantpi/Music/StarWars3.wav","filenameType":"str","format":"","chunk":false,"sendError":false,"encoding":"none","allProps":false,"x":790,"y":180,"wires":[["984d401542f7884e"]]}]

[brun0]

Hi, @grant2!

Thanks for the help, it worked. I needed to change the audio out node to play audio. In this scenario, it is only possible to generate the audio if Node-red is open in the browser, right? And there is only this scenario, right?

Thank you for your help!

[grant2]

Awesome, glad it works. In fact, Node-RED does not need to be open in the browser for this to work, but it needs to be running on the PC. Whenever I install Node-RED on a new Pi or other Linux device, I configure it to automatically start upon boot via the command:

sudo systemctl enable nodered.service

[brun0]

I believe I need to leave Node-red and Grafana on the same VM for it to work this way then. I’ll try. Thank you for your help!

[grant2]

Perhaps. I do not have Grafana or Node-RED running on any VM’s so cannot comment as to how that affects the webhook delivery.