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Device Plugins and Extended Resources

Pods can request CPU and memory, but what about a GPU, a high-speed NIC, or an FPGA? A device plugin is how a node advertises hardware beyond CPU/memory as an extended resource for pods to request and the scheduler to divvy up. This article stands up a real device plugin, captures the full gRPC flow it uses to register with kubelet and advertise devices, watches kubelet call Allocate when a pod runs, then uses the underlying mechanism to see the scheduler split it like CPU.