Challenge
Production could not stop for patching; previous attempts caused Monday morning outages.
Approach
- Agreed maintenance window with operations manager.
- Snapshot VMs and documented rollback steps.
- Applied patches remotely with engineer on bridge line.
- Verification call with operations at 6am next business day.
Outcomes
- Patches applied with no production stoppage.
- Rollback plan not required; snapshots retained 14 days.
- Repeat quarterly windows added to annual plan.
