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cloud-engineering

Pod Disruption Budget

Pod Disruption Budget

Definition

A Pod Disruption Budget (PDB) limits the number of pods from a deployment or replica set that can be voluntarily disrupted simultaneously — during node drains, cluster upgrades, or maintenance. PDBs ensure that rolling maintenance operations don't take too many replicas offline at once, maintaining service availability.

They are essential for zero-downtime cluster upgrades.


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