Harborvane Thoughtshttps://harborvane.io/thoughts/ Practical field notes on cloud infrastructure, Kubernetes, delivery, and operations.en-us The Kubernetes PDB Trap: Why Your Single-Pod PodDisruptionBudget Blocks Cluster Upgradeshttps://harborvane.io/thoughts/kubernetes-pdb-single-pod-trap/https://harborvane.io/thoughts/kubernetes-pdb-single-pod-trap/Wed, 04 Feb 2026 12:00:00 -0500Setting minAvailable: 1 with only one pod replica seems safe, until your cluster upgrades grind to a halt.