监控网页实现

backend/internal/monitor/metrics.go

@@ -0,0 +1,55 @@
+package monitor
+
+import (
+	"runtime"
+	"sync/atomic"
+	"time"
+)
+
+var startedAt = time.Now()
+
+var totalRequests uint64
+var totalErrors uint64
+
+type Snapshot struct {
+	UptimeSeconds int64   `json:"uptime_seconds"`
+	Goroutines    int     `json:"goroutines"`
+	MemoryAllocMB float64 `json:"memory_alloc_mb"`
+	MemorySysMB   float64 `json:"memory_sys_mb"`
+	CPUCores      int     `json:"cpu_cores"`
+	DiskTotalGB   float64 `json:"disk_total_gb"`
+	DiskFreeGB    float64 `json:"disk_free_gb"`
+	RequestsTotal uint64  `json:"requests_total"`
+	ErrorsTotal   uint64  `json:"errors_total"`
+}
+
+func IncrementRequestCount() {
+	atomic.AddUint64(&totalRequests, 1)
+}
+
+func IncrementErrorCount() {
+	atomic.AddUint64(&totalErrors, 1)
+}
+
+func GetSnapshot() Snapshot {
+	var mem runtime.MemStats
+	runtime.ReadMemStats(&mem)
+
+	diskTotal, diskFree := getDiskSpaceGB()
+
+	return Snapshot{
+		UptimeSeconds: int64(time.Since(startedAt).Seconds()),
+		Goroutines:    runtime.NumGoroutine(),
+		MemoryAllocMB: bytesToMB(mem.Alloc),
+		MemorySysMB:   bytesToMB(mem.Sys),
+		CPUCores:      runtime.NumCPU(),
+		DiskTotalGB:   diskTotal,
+		DiskFreeGB:    diskFree,
+		RequestsTotal: atomic.LoadUint64(&totalRequests),
+		ErrorsTotal:   atomic.LoadUint64(&totalErrors),
+	}
+}
+
+func bytesToMB(v uint64) float64 {
+	return float64(v) / 1024.0 / 1024.0
+}