Modern organizations rely on robust monitoring stacks to maintain service uptime and ensure system health. Prometheus, Grafana, Alertmanager, and Pushgateway form a popular open-source stack for monitoring and alerting, but achieving high availability (HA) and fault tolerance is critical to their reliability. This podcast explores the challenges of maintaining HA and fault tolerance in Prometheus monitoring stacks, strategies to mitigate risks, and how AWS services and Business Compass LLC play a role in delivering resilient architectures.