enhancement: clean up the raft log when the remaining space is insuff…

…icient; limit size of raft logs and rotate

Signed-off-by: wenjia322 <[email protected]>

util/log/log.go

@@ -281,9 +281,14 @@ func InitLog(dir, module string, level Level, rotate *LogRotate) (*Log, error) {
 			return nil, fmt.Errorf("[InitLog] stats disk space: %s",
 				err.Error())
 		}
-		minRatio := float64(fs.Blocks*uint64(fs.
-			Bsize)) * DefaultHeadRatio / 1024 / 1024
+		var minRatio float64
+		if float64(fs.Bavail*uint64(fs.Bsize)) < float64(fs.Blocks*uint64(fs.Bsize))*DefaultHeadRatio {
+			minRatio = float64(fs.Bavail*uint64(fs.Bsize)) * DefaultHeadRatio / 1024 / 1024
+		} else {
+			minRatio = float64(fs.Blocks*uint64(fs.Bsize)) * DefaultHeadRatio / 1024 / 1024
+		}
 		rotate.SetHeadRoomMb(int64(math.Min(minRatio, DefaultHeadRoom)))
+
 		minRollingSize := int64(fs.Bavail * uint64(fs.Bsize) / uint64(len(levelPrefixes)))
 		if minRollingSize < DefaultMinRollingSize {
 			minRollingSize = DefaultMinRollingSize

util/log/rotate.go

@@ -17,7 +17,7 @@ package log
 const (
 	// DefaultRollingSize Specifies at what size to roll the output log at
 	// Units: byte
-	DefaultRollingSize    = 20 * 1024 * 1024 * 1024
+	DefaultRollingSize    = 5 * 1024 * 1024 * 1024
 	DefaultMinRollingSize = 200 * 1024 * 1024
 	// DefaultHeadRoom The tolerance for the log space limit (in megabytes)
 	DefaultHeadRoom = 50 * 1024