Scheduler Metrics

HAMi exposes scheduler metrics on the configured scheduler metrics endpoint. The allocation outcome metrics use only bounded label values:

Metric	Meaning
hami_scheduler_allocations_total	Successful device reservations recorded by the filter phase.
hami_scheduler_allocation_failures_total	Filter and bind allocation failures.
hami_scheduler_bind_rollbacks_total	Bind failures that release a reservation.

The labels are phase, device_type, and failure_reason. They never contain pod, namespace, node, UUID, or request identifiers. failure_reason uses this complete, fixed set:

Value	Meaning
none	The operation succeeded.
no_fit	No candidate node could satisfy the device request.
lookup	A required pod or node could not be read from the scheduler cache.
identity	The bind request did not match the current pod identity or target.
lock	Device reservation locking failed.
annotation_patch	A required pod annotation update failed.
bind	Another bind operation failed.
internal	Internal usage, scoring, discovery, or cleanup failed.

A successful filter reservation uses failure_reason="none"; bind failures are reported by the failure and rollback counters.