Installation in a regular system without Kubernetes? Right now I can install Grafana, Prometheus and Alertmanager in a regular Linux system using distribution packages, and just worry about those programs themselves. If I want to install OnCall, I need not only OnCall plus four other non-trivial dependencies that will still need configuration, management and troubleshooting. All for something that is going to deal with far less load than any of Grafana/Prometheus/Alertmanager. I honestly do not understand it.
The problem still stands of adding dependencies, extra complexity and configuration. I’m usually happy about Grafana/Prometheus deployments because the base installation is fairly simple and self-contained, but this looks like a bit of a mess.
