Server watchdog?

Configuration
1

I’m running HASS on my homeserver and use Pushbullet for notifications, both of which depend on a) my homeserver being online and b) my internet connection being up and running. Somehow I would like to know if either one is down. I’ve got a Raspberry Pi offsite that I could use, it’s online 24/7 too.

What is the best way to do this? I know there are several commercial services for this, such as Uptime Robot, but I would like something simple that I can run on my own computers and get a notification if anything goes offline. I’m thinking about setting up a VPN or a SSH tunnel for pinging/NMAP or having a cron job write a time and date to a textfile every five minutes, a file that could then be rsynced to the other computer and processed. If the last update is more than say 15 minutes old, trigger a notification.

Ideally I would like to show my remote RPi as one of my devices in my HA dashboard.

Any suggestions?

2

I use Nmap (device tracker) & glances for all my system monitoring and it works well.

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3

Are any of your devices offsite, ie not on the same router as the others? If so, how do you do it? SSH tunnel or VPN?

Edit: just found Glances’ website and the component.

4

I have one router connected to another router/gateway to create secondary network for most of my HA stuff. Everything is on-site.

5

Create script that send mqtt heartbeat message to remote pi.
You may also do nthis as cron task running every 5min(or whatever you want)

HA may do this with automations.

6

See here…

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