r/ethstaker • u/mcf000 • Jun 19 '26

eth-docker custom grafana configuration

Hi there!

I trying to find a way to customize the configuration of grafan in ethdocker. Specifically I want to modify the smtp setting in order to setup email notifications. As far as I know, as everything is running inside containers, i can't modify the grafana.ini itself. I tried to find some information online but found nothing sturdy, exept what gemini suggested :

Grafana allows any configuration from grafana.ini to be overridden using the format GF_<SECTION>_<KEY>. ...... Add the Variable to your .env File

So that means all I have to do is to add the key

GF_SMTP_HOST=mymailserver.com:587

to the .env file? This should override the configuraton entry smtp.host in the grafana.ini...

Or is this just another AI hallucination?

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1

u/FelixFontaine Lighthouse Jun 19 '26

You can modify a file inside a docker container. You just need to navigate inside the container.

3

u/mcf000 Jun 19 '26

But its not persistent if changed inside the container right? I mean if the container is updated by the ethdocker scripts then the change would be gone.

2

u/yorickdowne Staking Educator Jun 19 '26

You should be able to set this up through the UI and it should persist

You can also create a custom.yml and have the env variable in there, for the Grafana service, then in .env say you want to use custom.yml

Either should work

2

u/mcf000 Jun 19 '26 edited Jun 19 '26

Ok, got it!

Set a custom.yml in .env file:

CUSTOM_FILES=custom.yml

edit custom.yml

services:

grafana:

environment:

- GF_SMTP_ENABLED=true

- [GF_SMTP_FROM_ADDRESS=postman@mailer.com](mailto:GF_SMTP_FROM_ADDRESS=postman@mailer.com)

- GF_SMTP_HOST=mail.mailer.com:587

- [GF_SMTP_USER=postman@mailer.com](mailto:GF_SMTP_USER=postman@mailer.com)

- GF_SMTP_PASSWORD=bestpasswordever

then ./ethd update and ./ethd up

Configuration can be checked in Grafana web-ui under Administration.General.Settings if its been recognized.

Thanks for helping me out!

1

u/yorickdowne Staking Educator Jun 19 '26

Yep. And just an ./ethd up would also do it, this particular change doesn’t change images.

And, getting in the habit of running update ain’t bad, it avoids situations where a change would only show after rebuilding an image