At Cloudflare, we use Prometheus heavily. We have point-of-presense in more than 275+ number of cities and each point-of-presense have their own prometheus. All these prometheis send alerts to a central alertmanager. We have various integrations to route the alerts. We also route all the alerts to a datastore for alert analytics.
Monika works as an SRE in Observability team @Cloudflare. She is passionate about observability, k8s and databases. Outside of work, she tries to keep up to the energy of her toddler.