Initial Proxmox dashboard with host and guest metrics

storage.go

@@ -0,0 +1,29 @@
+package main
+
+import "syscall"
+
+type StorageMetrics struct {
+	Mountpoint   string  `json:"mountpoint"`
+	TotalBytes   uint64  `json:"totalBytes"`
+	UsedBytes    uint64  `json:"usedBytes"`
+	FreeBytes    uint64  `json:"freeBytes"`
+	UsagePercent float64 `json:"usagePercent"`
+}
+
+func readStorageMetrics(path string) (StorageMetrics, error) {
+	var stat syscall.Statfs_t
+	if err := syscall.Statfs(path, &stat); err != nil {
+		return StorageMetrics{}, err
+	}
+	total := stat.Blocks * uint64(stat.Bsize)
+	free := stat.Bavail * uint64(stat.Bsize)
+	used := total - free
+	var percent float64
+	if total > 0 {
+		percent = float64(used) / float64(total) * 100
+	}
+	return StorageMetrics{
+		Mountpoint: path, TotalBytes: total, UsedBytes: used,
+		FreeBytes: free, UsagePercent: percent,
+	}, nil
+}