Here’s a great guide from @/dev/null | Pumpkin’s Pool on how to set up alerting for your validator on Solana with PagerDuty and Watchtower: Notion – The all-in-one workspace for your notes, tasks, wikis, and databases.
Also, JPool is running a telegram bot Telegram: Contact @solana_thevalidators_bot. It supports only validators using sv-manage, but it will support all of the validators in the next version of sv-manage (https://svt.one/)
If you have any other great alerting tools you use, please add them to this thread!