Initial QSfera import

Server/services/thumbnails/pkg/metrics/metrics.go

@@ -0,0 +1,67 @@
+package metrics
+
+import "github.com/prometheus/client_golang/prometheus"
+
+var (
+	// Namespace defines the namespace for the defines metrics.
+	Namespace = "qsfera"
+
+	// Subsystem defines the subsystem for the defines metrics.
+	Subsystem = "thumbnails"
+)
+
+// Metrics defines the available metrics of this service.
+type Metrics struct {
+	Counter   *prometheus.CounterVec
+	Latency   *prometheus.SummaryVec
+	Duration  *prometheus.HistogramVec
+	BuildInfo *prometheus.GaugeVec
+}
+
+// New initializes the available metrics.
+func New() *Metrics {
+	m := &Metrics{
+		Counter: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Namespace: Namespace,
+			Subsystem: Subsystem,
+			Name:      "getthumbnail_total",
+			Help:      "How many GetThumbnail requests processed",
+		}, []string{}),
+		Latency: prometheus.NewSummaryVec(prometheus.SummaryOpts{
+			Namespace: Namespace,
+			Subsystem: Subsystem,
+			Name:      "getthumbnail_latency_microseconds",
+			Help:      "GetThumbnail request latencies in microseconds",
+		}, []string{}),
+		Duration: prometheus.NewHistogramVec(prometheus.HistogramOpts{
+			Namespace: Namespace,
+			Subsystem: Subsystem,
+			Name:      "getthumbnail_duration_seconds",
+			Help:      "GetThumbnail method requests time in seconds",
+		}, []string{}),
+		BuildInfo: prometheus.NewGaugeVec(prometheus.GaugeOpts{
+			Namespace: Namespace,
+			Subsystem: Subsystem,
+			Name:      "build_info",
+			Help:      "Build information",
+		}, []string{"version"}),
+	}
+
+	_ = prometheus.Register(
+		m.Counter,
+	)
+
+	_ = prometheus.Register(
+		m.Latency,
+	)
+
+	_ = prometheus.Register(
+		m.Duration,
+	)
+
+	_ = prometheus.Register(
+		m.BuildInfo,
+	)
+
+	return m
+}