add telemetry (#6926)

* add telemetry

* fix go mod

* add default telemetry server url

* Update README.md

* replace with broker count instead of s3 count

* Update telemetry.pb.go

* github action to deploy

1 files changed, 111 insertions, 0 deletions

diff --git a/telemetry/server/main.go b/telemetry/server/main.go
new file mode 100644
index 000000000..6cbae05c7
--- /dev/null
+++ b/telemetry/server/main.go
@@ -0,0 +1,111 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"github.com/seaweedfs/seaweedfs/telemetry/server/api"
+	"github.com/seaweedfs/seaweedfs/telemetry/server/dashboard"
+	"github.com/seaweedfs/seaweedfs/telemetry/server/storage"
+)
+
+var (
+	port            = flag.Int("port", 8080, "HTTP server port")
+	enableCORS      = flag.Bool("cors", true, "Enable CORS for dashboard")
+	logRequests     = flag.Bool("log", true, "Log incoming requests")
+	enableDashboard = flag.Bool("dashboard", true, "Enable built-in dashboard (optional when using Grafana)")
+	cleanupInterval = flag.Duration("cleanup", 24*time.Hour, "Cleanup interval for old instances")
+	maxInstanceAge  = flag.Duration("max-age", 30*24*time.Hour, "Maximum age for instances before cleanup")
+)
+
+func main() {
+	flag.Parse()
+
+	// Create Prometheus storage instance
+	store := storage.NewPrometheusStorage()
+
+	// Start cleanup routine
+	go func() {
+		ticker := time.NewTicker(*cleanupInterval)
+		defer ticker.Stop()
+		for range ticker.C {
+			store.CleanupOldInstances(*maxInstanceAge)
+		}
+	}()
+
+	// Setup HTTP handlers
+	mux := http.NewServeMux()
+
+	// Prometheus metrics endpoint
+	mux.Handle("/metrics", promhttp.Handler())
+
+	// API endpoints
+	apiHandler := api.NewHandler(store)
+	mux.HandleFunc("/api/collect", corsMiddleware(logMiddleware(apiHandler.CollectTelemetry)))
+	mux.HandleFunc("/api/stats", corsMiddleware(logMiddleware(apiHandler.GetStats)))
+	mux.HandleFunc("/api/instances", corsMiddleware(logMiddleware(apiHandler.GetInstances)))
+	mux.HandleFunc("/api/metrics", corsMiddleware(logMiddleware(apiHandler.GetMetrics)))
+
+	// Dashboard (optional)
+	if *enableDashboard {
+		dashboardHandler := dashboard.NewHandler()
+		mux.HandleFunc("/", corsMiddleware(dashboardHandler.ServeIndex))
+		mux.HandleFunc("/dashboard", corsMiddleware(dashboardHandler.ServeIndex))
+		mux.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("./static"))))
+	}
+
+	// Health check
+	mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]string{
+			"status": "ok",
+			"time":   time.Now().UTC().Format(time.RFC3339),
+		})
+	})
+
+	addr := fmt.Sprintf(":%d", *port)
+	log.Printf("Starting telemetry server on %s", addr)
+	log.Printf("Prometheus metrics: http://localhost%s/metrics", addr)
+	if *enableDashboard {
+		log.Printf("Dashboard: http://localhost%s/dashboard", addr)
+	}
+	log.Printf("Cleanup interval: %v, Max instance age: %v", *cleanupInterval, *maxInstanceAge)
+
+	if err := http.ListenAndServe(addr, mux); err != nil {
+		log.Fatalf("Server failed: %v", err)
+	}
+}
+
+func corsMiddleware(next http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if *enableCORS {
+			w.Header().Set("Access-Control-Allow-Origin", "*")
+			w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
+			w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+		}
+
+		if r.Method == "OPTIONS" {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+
+		next(w, r)
+	}
+}
+
+func logMiddleware(next http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if *logRequests {
+			start := time.Now()
+			next(w, r)
+			log.Printf("%s %s %s %v", r.Method, r.URL.Path, r.RemoteAddr, time.Since(start))
+		} else {
+			next(w, r)
+		}
+	}
+}