Running instances of Horizon on various servers for monitoring service

[sts-ryan-holton]

Hi,

This is a Q&A that I'd like some guidance with. My Laravel application is a website monitoring service that allows users to add their website URL, select a monitoring type and get noticed when their site appears down (doesn't return a 2XX code).

The application runs as one on a server on Digital Ocean. I run a separate managed Redis database as I also run Horizon.

I'd like to provide the user the option to have their website checked from a "secondary" location of their choice (from a pre-defined list) if an uptime check from their "primary" location fails.

The issue I've got, is I don't want to distribute the entire Laravel application onto multiple servers since it's just the HTTP client checks that make the requests and report back, so, how would I go about performing these uptime checks from other server locations?

How might you implement such feature whilst ensuring reliability and balancing cost?