metrics server added

config/config.go

@@ -5,6 +5,7 @@ import "runtime"
 type Config struct {
 	App     AppConfig
 	Rabbit  RabbitMQConfig
+	Metrics MetricsConfig
 }
 
 type AppConfig struct {
@@ -27,6 +28,12 @@ type RabbitMQConfig struct {
 	TaskResultQueue string
 }
 
+type MetricsConfig struct {
+	Host    string
+	Port    string
+	GinMode string
+}
+
 func New() *Config {
 	return &Config{
 		App: AppConfig{
@@ -48,5 +55,11 @@ func New() *Config {
 			TaskSourceQueue: getEnv("TASK_SOURCE_QUEUE", "task-publisher-mandarake"),
 			TaskResultQueue: getEnv("TASK_RESULT_QUEUE", "tasks-results"),
 		},
+
+		Metrics: MetricsConfig{
+			Host:    getEnv("METRICS_HOST", "0.0.0.0"),
+			Port:    getEnv("METRICS_PORT", "19080"),
+			GinMode: getEnv("METRICS_GIN_MODE", "dev"),
+		},
 	}
 }

internal/app/handler.go

@@ -3,9 +3,11 @@ package app
 import (
 	"context"
 	log "github.com/sirupsen/logrus"
+	"net"
 	"scrapper-mandarake/config"
 	"scrapper-mandarake/internal/scrapper"
 	"scrapper-mandarake/internal/tasks"
+	"scrapper-mandarake/pkg/router"
 	"time"
 )
 
@@ -14,6 +16,7 @@ const AppName string = "Mandarake parser"
 type App struct {
 	transport  tasks.TaskTransport
 	scrapper   scrapper.PriceScrapper
+	metricsSrv *router.Handler
 }
 
 func NewApp(cfg *config.Config) *App {
@@ -37,6 +40,11 @@ func NewApp(cfg *config.Config) *App {
 		TaskTimeout:      cfg.App.TaskTimeoutSeconds,
 	})
 
+	a.metricsSrv = router.NewHandler(router.Deps{
+		Addr:    net.JoinHostPort(cfg.Metrics.Host, cfg.Metrics.Port),
+		GinMode: cfg.Metrics.GinMode,
+	})
+
 	log.Infof("%v: %v", AppName, cfg.App.Mode)
 	return &a
 }
@@ -52,6 +60,13 @@ func (app *App) Run(ctx context.Context) error {
 		return err
 	}
 
+	//start metrics server
+	go func() {
+		if err := app.metricsSrv.Run(); err != nil {
+			log.Fatal(err)
+		}
+	}()
+
 	<-ctx.Done()
 	return app.Shutdown(ctx)
 }
@@ -63,6 +78,10 @@ func (app *App) Shutdown(ctx context.Context) error {
 
 	app.scrapper.Stop()
 
+	if err := app.metricsSrv.Shutdown(ctx); err != nil {
+		log.WithError(err).Error("Failed to shutdown server")
+	}
+
 	_ = ctx
 	return nil
 }

mandarake.env

@@ -14,3 +14,9 @@ RABBIT_LOGGING_ENABLED=false
 
 TASK_SOURCE_QUEUE=task-publisher-mandarake
 TASK_RESULT_QUEUE=tasks-results
+
+
+METRICS_HOST=0.0.0.0
+METRICS_PORT=19080
+METRICS_GIN_MODE=release
+

pkg/router/handler.go

@@ -0,0 +1,62 @@
+package router
+
+import (
+	"context"
+	"errors"
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+	ginprometheus "github.com/zsais/go-gin-prometheus"
+	"net/http"
+)
+
+type Handler struct {
+	srv *http.Server
+}
+
+type Deps struct {
+	Addr    string
+	GinMode string
+}
+
+const pkgLogHeader string = "Router |"
+
+func NewHandler(deps Deps) *Handler {
+	engine := gin.New()
+
+	if deps.GinMode == "release" {
+		gin.SetMode(gin.ReleaseMode)
+		err := engine.SetTrustedProxies([]string{"172.20.0.0/16"})
+		if err != nil {
+			log.WithError(err).Errorf("%v Set proxies failed", pkgLogHeader)
+			return nil
+		}
+	}
+
+	logGroup := engine.Group("")
+	logGroup.GET("/", func(c *gin.Context) { c.JSON(200, gin.H{"msg": "v2"}) })
+
+	p := ginprometheus.NewPrometheus("gin")
+	p.Use(engine)
+
+	srv := http.Server{
+		Addr:    deps.Addr,
+		Handler: engine,
+	}
+
+	return &Handler{
+		srv: &srv,
+	}
+}
+
+func (h *Handler) Run() error {
+	log.Infof("Starting server on %s", h.srv.Addr)
+	if err := h.srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+		log.WithError(err).Errorf("%v ListenAndServe failed", pkgLogHeader)
+		return err
+	}
+	return nil
+}
+
+func (h *Handler) Shutdown(ctx context.Context) error {
+	return h.srv.Shutdown(ctx)
+}