From fff289f957e3b11f81feb311c16b38f2f23d3e13 Mon Sep 17 00:00:00 2001
From: nutcas3 <mauricee423@gmail.com>
Date: Sat, 25 Apr 2026 03:28:26 +0300
Subject: [PATCH] feat: Add Prometheus metrics endpoint to carrier-connector

- Add prometheus/client_golang v1.20.5 dependency to go.mod
- Add /api/v1/metrics endpoint using promhttp.Handler() wrapped with gin.WrapH
---
 apps/carrier-connector/go.mod    | 1 +
 apps/carrier-connector/routes.go | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/apps/carrier-connector/go.mod b/apps/carrier-connector/go.mod
index 96010f0..0af2bfb 100644
--- a/apps/carrier-connector/go.mod
+++ b/apps/carrier-connector/go.mod
@@ -5,6 +5,7 @@ go 1.26
 require (
 	github.com/go-resty/resty/v2 v2.17.2
 	github.com/joho/godotenv v1.5.1
+	github.com/prometheus/client_golang v1.20.5
 	github.com/rs/zerolog v1.35.0
 )
 
diff --git a/apps/carrier-connector/routes.go b/apps/carrier-connector/routes.go
index e86808f..1fc8d57 100644
--- a/apps/carrier-connector/routes.go
+++ b/apps/carrier-connector/routes.go
@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
 
 	"github.com/nutcas3/telecom-platform/apps/carrier-connector/internal/es2"
 	handler "github.com/nutcas3/telecom-platform/apps/carrier-connector/internal/handler"
@@ -17,6 +18,7 @@ func setupRoutes(router *gin.Engine, client *es2.ES2Client, repo repository.Prof
 	api.GET("/health", healthHandler)
 	api.GET("/health/ready", readinessHandler(repo))
 	api.GET("/health/live", livenessHandler)
+	api.GET("/metrics", gin.WrapH(promhttp.Handler()))
 
 	esim := api.Group("/esim")
 	{