I want to understand more about why you think that pull doesn't scale. Borgmon at Google (the biggest scale ever) worked fine with a pull model, and as far as I

I want to understand more about why you think that pull doesn't scale. Borgmon at Google (the biggest scale ever) worked fine with a pull model, and as far as I know, the successor still pulls, too. A push model also has the problem that now the identity of each instance needs to be known by each instance itself, instead of only by the monitoring system via service discovery (which needs to know about what instances should exist and their identity anyways, otherwise how is it going to let you know that something is wrong?). We also have an FAQ in Prometheus about why we prefer pull: https://prometheus.io/docs/introduction/faq/#why-do-you-pull-rather-than-push https://prometheus.io/docs/introduction/faq/#why-do-you-pull...? In my experience, pulling is operationally much nicer than pushing, and I've worked with both. It also gives you somewhat less of an accidental DDoS exposure.