Not wishing to duplicate T53497: Setup monitoring for Beta Cluster (tracking), we should implement some very basic alerting for Beta Cluster availability.
I've run https://uptime.theresnotime.io/status/beta-cluster for a few months now, and have it configured to "page" me via pushover (as does jenkins-watch for Beta deployment jobs going overdue) — I'm happy to continue running this, and could potentially have Beta alerts feed into AlertManager etc via a webhook?
Actionable from https://wikitech.wikimedia.org/wiki/Incidents/2022-08-16_Beta_Cluster_502#Actionables