Listen to when HA is about to stop (or restart)

Configuration
1

Hi folks,

Is there a way to know when Home Assistant is about to restart ?
e.g. If someone goes to Development Tools/YAML/Restart, is there a way to know (programmatically) that this options was triggered?

What I tried:

  • Listening to “homeassistant_stop” in nodered does not work as nodered is stoped before the event is raised.
  • Adding an automation triggered by “homeassistant” (event shutdown) also does not work and this automation is never triggered.

Thank you in advance

3

I am using this trigger successfully in automations. In my case I am sending rest_commands to put my wall tablets into maintenance mode while Home Assistant is restarting.

I have just successfully reproduced this with a very simple automation that just logs a message:

alias: Test shutdown
trigger:
  - platform: homeassistant
    event: shutdown
action:
  - service: system_log.write
    data:
      message: About to shut down
mode: single
4

And below a notification when system has started:

- id: system_startup
  alias: 'System Startup'
  trigger:
    platform: homeassistant
    event: start
  action:
  - service: notify.telegram_xxxx
    data:
      title: '✅ *System startup*'
      message: >
        Home Assistant has started.

        {{ now().strftime("%H:%M:%S") }}
1 Like
5

Thank you for your feedback. That is super strange, I tried to write a value into an input_text just for testing purposes and it was never written. I will give another try.

6

Same to me…
I have an automation on shutdown where it should set a binary input and then send me a notification thru Signal. The notification works fine, but the input is never set.

7

Humm, I am not crazy :slight_smile:
So trigger happens in parallel of the shutdown process and you can’t use other HA services as action.

8

It makes sense, however the notification service always works during the restart. I’he an automation to send me a notification (using Signal Messenger) during shutdown and during starting and it is rock solid on the notifications, but the service to set a helper, which I’d like to use to detect a start without a “controlled” restart, fails 100% of the time.

9

But just to make clear, I agree with your point… I just don’t understand why this is not the same for all services.