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Introduce metrics representing N+ license status #1102

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Introduce metrics representing N+ license status #1102

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84ad998
Introduce N+ license related metrics
defanator Aug 20, 2025
ff6c571
Merge branch 'main' into license_expiration_metric
pdabelf5 Aug 22, 2025
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45 changes: 36 additions & 9 deletions collector/nginx_plus.go
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Original file line number Diff line number Diff line change
Expand Up @@ -274,15 +274,19 @@ func NewNginxPlusCollector(nginxClient *plusclient.NginxClient, namespace string
nginxClient: nginxClient,
logger: logger,
totalMetrics: map[string]*prometheus.Desc{
"connections_accepted": newGlobalMetric(namespace, "connections_accepted", "Accepted client connections", constLabels),
"connections_dropped": newGlobalMetric(namespace, "connections_dropped", "Dropped client connections", constLabels),
"connections_active": newGlobalMetric(namespace, "connections_active", "Active client connections", constLabels),
"connections_idle": newGlobalMetric(namespace, "connections_idle", "Idle client connections", constLabels),
"http_requests_total": newGlobalMetric(namespace, "http_requests_total", "Total http requests", constLabels),
"http_requests_current": newGlobalMetric(namespace, "http_requests_current", "Current http requests", constLabels),
"ssl_handshakes": newGlobalMetric(namespace, "ssl_handshakes", "Successful SSL handshakes", constLabels),
"ssl_handshakes_failed": newGlobalMetric(namespace, "ssl_handshakes_failed", "Failed SSL handshakes", constLabels),
"ssl_session_reuses": newGlobalMetric(namespace, "ssl_session_reuses", "Session reuses during SSL handshake", constLabels),
"connections_accepted": newGlobalMetric(namespace, "connections_accepted", "Accepted client connections", constLabels),
"connections_dropped": newGlobalMetric(namespace, "connections_dropped", "Dropped client connections", constLabels),
"connections_active": newGlobalMetric(namespace, "connections_active", "Active client connections", constLabels),
"connections_idle": newGlobalMetric(namespace, "connections_idle", "Idle client connections", constLabels),
"http_requests_total": newGlobalMetric(namespace, "http_requests_total", "Total http requests", constLabels),
"http_requests_current": newGlobalMetric(namespace, "http_requests_current", "Current http requests", constLabels),
"ssl_handshakes": newGlobalMetric(namespace, "ssl_handshakes", "Successful SSL handshakes", constLabels),
"ssl_handshakes_failed": newGlobalMetric(namespace, "ssl_handshakes_failed", "Failed SSL handshakes", constLabels),
"ssl_session_reuses": newGlobalMetric(namespace, "ssl_session_reuses", "Session reuses during SSL handshake", constLabels),
"license_active_till": newGlobalMetric(namespace, "license_expiration_timestamp_seconds", "License expiration date (expressed as Unix Epoch Time)", constLabels),
"license_reporting_healthy": newGlobalMetric(namespace, "license_reporting_healthy", "Indicates whether the reporting state is still considered healthy despite recent failed attempts", constLabels),
"license_reporting_fails": newGlobalMetric(namespace, "license_reporting_fails_count", "Number of failed reporting attempts, reset each time the usage report is successfully sent", constLabels),
"license_reporting_grace_period": newGlobalMetric(namespace, "license_reporting_grace_period_seconds", "Number of seconds before traffic processing is stopped after unsuccessful report attempt", constLabels),
},
serverZoneMetrics: map[string]*prometheus.Desc{
"processing": newServerZoneMetric(namespace, "processing", "Client requests that are currently being processed", variableLabelNames.ServerZoneVariableLabelNames, constLabels),
Expand Down Expand Up @@ -654,6 +658,29 @@ func (c *NginxPlusCollector) Collect(ch chan<- prometheus.Metric) {
ch <- prometheus.MustNewConstMetric(c.totalMetrics["ssl_session_reuses"],
prometheus.CounterValue, float64(stats.SSL.SessionReuses))

license, err := c.nginxClient.GetNginxLicense(context.TODO())
if err != nil {
c.logger.Warn("error getting license information", "error", err.Error())
} else {
ch <- prometheus.MustNewConstMetric(c.totalMetrics["license_active_till"],
prometheus.GaugeValue, float64(license.ActiveTill))

if license.Reporting != nil {
if license.Reporting.Healthy {
ch <- prometheus.MustNewConstMetric(c.totalMetrics["license_reporting_healthy"],
prometheus.GaugeValue, float64(1))
} else {
ch <- prometheus.MustNewConstMetric(c.totalMetrics["license_reporting_healthy"],
prometheus.GaugeValue, float64(0))
}
ch <- prometheus.MustNewConstMetric(c.totalMetrics["license_reporting_fails"],
prometheus.GaugeValue, float64(license.Reporting.Fails))

ch <- prometheus.MustNewConstMetric(c.totalMetrics["license_reporting_grace_period"],
prometheus.GaugeValue, float64(license.Reporting.Grace))
}
}

for name, zone := range stats.ServerZones {
labelValues := []string{name}
varLabelValues := c.getServerZoneLabelValues(name)
Expand Down