From 6136e08bbda2b5cd1acaf189961c9feec48e7ebd Mon Sep 17 00:00:00 2001
From: Valentin Doreau <v.doreau@e-durable.ch>
Date: Fri, 15 Nov 2024 16:47:30 +0100
Subject: [PATCH] feat: also export app-exporter version

---
 app_exporter.go | 3 +++
 apps/metrics.go | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/app_exporter.go b/app_exporter.go
index afb81fe..875c93f 100644
--- a/app_exporter.go
+++ b/app_exporter.go
@@ -55,6 +55,9 @@ func main() {
 }
 
 func RecordMetrics(m apps.Metrics) {
+	// export the app-exporter version
+	m.Version.With(prometheus.Labels{"version": VERSION})
+
 	for {
 		m.Reset()
 
diff --git a/apps/metrics.go b/apps/metrics.go
index 1e19230..8224695 100644
--- a/apps/metrics.go
+++ b/apps/metrics.go
@@ -14,6 +14,7 @@ type Metrics struct {
 	Odoo          prometheus.GaugeVec
 	Postgres      prometheus.GaugeVec
 	Vaultwarden   prometheus.GaugeVec
+	Version       prometheus.GaugeVec
 }
 
 func NewMetrics(reg prometheus.Registerer) *Metrics {
@@ -27,6 +28,7 @@ func NewMetrics(reg prometheus.Registerer) *Metrics {
 		Odoo:          *prometheus.NewGaugeVec(prometheus.GaugeOpts{Namespace: "app", Subsystem: "version", Name: "odoo", Help: ""}, []string{"version", "version_date"}),
 		Postgres:      *prometheus.NewGaugeVec(prometheus.GaugeOpts{Namespace: "app", Subsystem: "version", Name: "postgres", Help: ""}, []string{"version"}),
 		Vaultwarden:   *prometheus.NewGaugeVec(prometheus.GaugeOpts{Namespace: "app", Subsystem: "version", Name: "vaultwarden", Help: ""}, []string{"version"}),
+		Version:       *prometheus.NewGaugeVec(prometheus.GaugeOpts{Namespace: "appexporter", Name: "version", Help: "The version of this exporter"}, []string{"version"}),
 	}
 
 	reg.MustRegister(
@@ -39,6 +41,7 @@ func NewMetrics(reg prometheus.Registerer) *Metrics {
 		metrics.Odoo,
 		metrics.Postgres,
 		metrics.Vaultwarden,
+		metrics.Version,
 	)
 
 	return metrics
@@ -46,6 +49,8 @@ func NewMetrics(reg prometheus.Registerer) *Metrics {
 
 // Reset all metrics
 //
+// Reset all except app-exporter version
+//
 // This should be called on every loop iteration.
 func (m *Metrics) Reset() {
 	m.Cubebackup.Reset()