feat 在线人数埋点

app/prometheus.go

@@ -6,6 +6,8 @@ import (
 	"fmt"
 	"git.hlsq.asia/mmorpg/service-common/log"
 	"git.hlsq.asia/mmorpg/service-gateway/config"
+	"git.hlsq.asia/mmorpg/service-gateway/internal/global"
+	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"net/http"
 	"sync"
@@ -19,6 +21,13 @@ type ModulePrometheus struct {
 
 func (m *ModulePrometheus) init() error {
 	m.wg = &sync.WaitGroup{}
+
+	global.OnlineUsersGauge = prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "gateway_online_users_total",
+		Help: "Total number of online users in gateway",
+	})
+	prometheus.MustRegister(global.OnlineUsersGauge)
+
 	return nil
 }