This draft turns a storage incident note into a troubleshooting pattern: reproduce the issue with a minimal PVC and pod, inspect the events and Longhorn volume state, and use that evidence to separate application problems from storage attachment problems.
This draft turns a real internal outage note into a cleaner incident write-up covering the forced Kubernetes upgrade, the storage failure that followed, the backup gap we ran into, and the operational changes that came out of it.
This draft captures the part of a Longhorn installation that usually matters most in practice: make sure the node dependencies are in place, enable iscsid, run the environment check script, fix the obvious blockers, and only then install the chart.