},
	[]string{"volume_plugin", "operation_name", "status", "migrated"},
)

var storageOperationEndToEndLatencyMetric = metrics.NewHistogramVec(
	&metrics.HistogramOpts{
		Name:           "volume_operation_total_seconds",
		Help:           "Storage operation end to end duration in seconds",
		Buckets:        []float64{.1, .25, .5, 1, 2.5, 5, 10, 15, 25, 50, 120, 300, 600},
		StabilityLevel: metrics.ALPHA,
	},

  2. if there's a transient error happened during "provisioning/deletion", i.e., a volume is still in-use while a deleteVolume has been called, original `storage_operation_duration_seconds` will NOT wait until a volume has been finally deleted before reporting an inaccurate latency metric. The newly implemented metric `volume_operation_total_seconds`, however, waits until a provisioning/deletion operation...