Need extra labels support for velero backup metrics

[nirmal20081028]

Hi Team,

Could you please let me know if there is a way to consume extra labels for velero_backup_last_successful_timestamp metric along with schedulename?

If there is no way, is there any possibility of supporting extra labels in the new Velero version?

[blackpiglet]

velero/pkg/metrics/metrics.go

Lines 101 to 108 in 804d73c

	backupLastSuccessfulTimestamp: prometheus.NewGaugeVec(
	prometheus.GaugeOpts{
	Namespace: metricNamespace,
	Name: backupLastSuccessfulTimestamp,
	Help: "Last time a backup ran successfully, Unix timestamp in seconds",
	},
	[]string{scheduleLabel},
	),

It is defined by the code, and there is no mechanism to customize the labels yet.