Add build version (and start date).

server/routes.go

@@ -1194,6 +1194,9 @@ func (s *Server) GenerateRoutes(rc *ollama.Registry) (http.Handler, error) {
 		slog.Warn(fmt.Sprintf("Metrics initialization failed with %s", err))
 	}
 	s.metrics = m
+	s.metrics.Start.Record(nil, time.Now().UnixMicro()/1e6, metric.WithAttributes(
+		attribute.String("version", version.Version),
+	))
 
 	r := gin.Default()
 	r.HandleMethodNotAllowed = true

telemetry/metrics.go

@@ -20,6 +20,7 @@ const (
 )
 
 type Metrics struct {
+	Start              metric.Int64Gauge
 	Requests           metric.Int64Counter
 	TotalDuration      metric.Float64Counter
 	LoadDuration       metric.Float64Counter
@@ -30,6 +31,12 @@ type Metrics struct {
 }
 
 func NewMetrics(meter metric.Meter) *Metrics {
+	build, _ := meter.Int64Gauge(
+		"ollama_build_info",
+		metric.WithDescription("Ollama start date (as Unixtime) and build version."),
+		metric.WithUnit("seconds"),
+	)
+
 	req, _ := meter.Int64Counter(
 		"http_requests_total",
 		metric.WithDescription("The total number of requests on the endpoints."),
@@ -73,6 +80,7 @@ func NewMetrics(meter metric.Meter) *Metrics {
 	)
 
 	return &Metrics{
+		Start:              build,
 		Requests:           req,
 		TotalDuration:      totalDuration,
 		LoadDuration:       loadDuration,