https://blog.ajomathew.dev/tags/planned-maintenance/Recent content in Planned-Maintenance on Ajo MathewHugo -- gohugo.ioen-USTue, 25 Nov 2025 00:00:00 +0000https://blog.ajomathew.dev/posts/2025-11-25-a-practical-guide-to-handling-azure-alerts-during-planned-maintenance/Tue, 25 Nov 2025 00:00:00 +0000https://blog.ajomathew.dev/posts/2025-11-25-a-practical-guide-to-handling-azure-alerts-during-planned-maintenance/<h1 id="problem-description">Problem description</h1> <p>Availability alerts for VMs in a resource group were configured. During planned maintenance (for example, a VM reboot), the team receives VM availability notifications that are false positives. How can we avoid or resolve these false alarms?</p> <h1 id="approaches">Approaches</h1> <p>The alert in question uses VM availability metrics evaluated every 1 minute with a 5‑minute lookback window.</p> <h2 id="option-1--disable-the-alert-during-the-maintenance-window">Option 1 — Disable the alert during the maintenance window</h2> <ul> <li>When you stop the VM, disable the alert.</li> <li>When you start the VM, re-enable the alert.</li> </ul> <p>This is a simple approach but requires coordinating the start/stop process with alert management.</p>