metrics

type Metrics struct {
	Registry *prometheus.Registry

	// VIP state: 0=withdrawn, 1=announced, 2=pessimized
	VIPState *prometheus.GaugeVec
	// VIP transitions counter
	VIPTransitions *prometheus.CounterVec
	// VIP last transition timestamp
	VIPLastTransition *prometheus.GaugeVec
	// VIP priority status (AS-path multiplier: 1=normal, N=prepend count)
	VIPPriority *prometheus.GaugeVec

	// Route state: per-peer per-VIP (1=advertised, 0=withdrawn)
	RouteState *prometheus.GaugeVec

	// Check counters by result (success/fail/stale)
	CheckTotal *prometheus.CounterVec
	// Checks absorbed by rise/fall (did not trigger state change)
	CheckAbsorbed *prometheus.CounterVec
	// Check duration histogram
	CheckDuration *prometheus.HistogramVec
	// Check last result (0=fail, 1=ok)
	CheckLastResult *prometheus.GaugeVec
	// Check timeout exceeded
	CheckTimeoutExceeded *prometheus.CounterVec
}