自动检测本地数据库磁盘是否已满，如果已满，则不再写入访问日志

internal/db/utils/disk.go

@@ -0,0 +1,73 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package dbutils
+
+import (
+	"github.com/TeaOSLab/EdgeAPI/internal/goman"
+	"github.com/go-sql-driver/mysql"
+	"github.com/iwind/TeaGo/dbs"
+	"golang.org/x/sys/unix"
+	"time"
+)
+
+const minFreeSpaceGB = 3
+
+var HasFreeSpace = true
+var IsLocalDatabase = false
+var LocalDatabaseDataDir = ""
+
+func init() {
+	var ticker = time.NewTicker(5 * time.Minute)
+
+	dbs.OnReadyDone(func() {
+		goman.New(func() {
+			for range ticker.C {
+				HasFreeSpace = CheckHasFreeSpace()
+			}
+		})
+	})
+}
+
+// CheckHasFreeSpace 检查当前数据库是否有剩余空间
+func CheckHasFreeSpace() bool {
+	db, _ := dbs.Default()
+	if db == nil {
+		return false
+	}
+
+	config, _ := db.Config()
+	if config == nil {
+		return false
+	}
+
+	dsnConfig, _ := mysql.ParseDSN(config.Dsn)
+	if dsnConfig == nil {
+		return false
+	}
+
+	if IsLocalAddr(dsnConfig.Addr) {
+		IsLocalDatabase = true
+
+		// only for local database
+		one, err := db.FindOne("SHOW VARIABLES WHERE variable_name='datadir'")
+		if err != nil || len(one) == 0 {
+			return true
+		}
+
+		var dir = one.GetString("Value")
+		if len(dir) == 0 {
+			return true
+		}
+		LocalDatabaseDataDir = dir
+
+		var stat unix.Statfs_t
+		err = unix.Statfs(dir, &stat)
+		if err != nil {
+			return true
+		}
+
+		var availableSpace = (stat.Bavail * uint64(stat.Bsize)) / (1 << 30) // GB
+		return availableSpace > minFreeSpaceGB
+	}
+	return true
+}