Support organization units

ssl_exporter.go

@@ -56,6 +56,11 @@ var (
 		"Subject Alternative DNS Names",
 		[]string{"serial_no", "issuer_cn", "emails"}, nil,
 	)
+	subjectOrganizationUnits = prometheus.NewDesc(
+		prometheus.BuildFQName(namespace, "", "cert_subject_organization_units"),
+		"Subject Organization Units",
+		[]string{"serial_no", "issuer_cn", "subject_ou"}, nil,
+	)
 )
 
 type Exporter struct {
@@ -71,6 +76,7 @@ func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
 	ch <- subjectAlernativeDNSNames
 	ch <- subjectAlernativeIPs
 	ch <- subjectAlernativeEmailAddresses
+	ch <- subjectOrganizationUnits
 }
 
 func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
@@ -119,6 +125,7 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
 		subject_emails := cert.EmailAddresses
 		subject_ips := cert.IPAddresses
 		serial_no := cert.SerialNumber.String()
+		ous := cert.Subject.OrganizationalUnit
 
 		if !cert.NotAfter.IsZero() {
 			ch <- prometheus.MustNewConstMetric(
@@ -159,6 +166,12 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
 				subjectAlernativeIPs, prometheus.GaugeValue, 1, serial_no, issuer_cn, i,
 			)
 		}
+
+		if len(ous) > 0 {
+			ch <- prometheus.MustNewConstMetric(
+				subjectOrganizationUnits, prometheus.GaugeValue, 1, serial_no, issuer_cn, ","+strings.Join(ous, ",")+",",
+			)
+		}
 	}
 }