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90 lines
2.5 KiB
90 lines
2.5 KiB
package util
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import (
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"errors"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"strconv"
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"strings"
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)
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// MinFreeSpaceType is the type of MinFreeSpace.
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type MinFreeSpaceType int
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const (
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// AsPercent set the MinFreeSpaceType to a percentage value from 0 to 100.
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AsPercent MinFreeSpaceType = iota
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// AsBytes set the MinFreeSpaceType to a absolute value bytes.
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AsBytes
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)
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// MinFreeSpace is type that defines the limit for the minimum free space.
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type MinFreeSpace struct {
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Type MinFreeSpaceType
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Bytes uint64
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Percent float32
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Raw string
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}
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// IsLow tells whether the free space is low or not.
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func (s MinFreeSpace) IsLow(freeBytes uint64, freePercent float32) (yes bool, desc string) {
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switch s.Type {
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case AsPercent:
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yes = freePercent < s.Percent
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op := IfElse(yes, "<", ">=")
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return yes, fmt.Sprintf("disk free %.2f%% %s required %.2f%%", freePercent, op, s.Percent)
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case AsBytes:
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yes = freeBytes < s.Bytes
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op := IfElse(yes, "<", ">=")
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return yes, fmt.Sprintf("disk free %s %s required %s",
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BytesToHumanReadable(freeBytes), op, BytesToHumanReadable(s.Bytes))
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}
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return false, ""
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}
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// String returns a string representation of MinFreeSpace.
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func (s MinFreeSpace) String() string {
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switch s.Type {
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case AsPercent:
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return fmt.Sprintf("%.2f%%", s.Percent)
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default:
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return s.Raw
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}
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}
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// MustParseMinFreeSpace parses comma-separated argument for min free space setting.
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// minFreeSpace has the high priority than minFreeSpacePercent if it is set.
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func MustParseMinFreeSpace(minFreeSpace string, minFreeSpacePercent string) (spaces []MinFreeSpace) {
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ss := strings.Split(EmptyTo(minFreeSpace, minFreeSpacePercent), ",")
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for _, freeString := range ss {
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if vv, e := ParseMinFreeSpace(freeString); e == nil {
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spaces = append(spaces, *vv)
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} else {
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glog.Fatalf("The value specified in -minFreeSpace not a valid value %s", freeString)
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}
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}
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return spaces
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}
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var ErrMinFreeSpaceBadValue = errors.New("minFreeSpace is invalid")
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// ParseMinFreeSpace parses min free space expression s as percentage like 1,10 or human readable size like 10G
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func ParseMinFreeSpace(s string) (*MinFreeSpace, error) {
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if percent, e := strconv.ParseFloat(s, 32); e == nil {
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if percent < 0 || percent > 100 {
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return nil, ErrMinFreeSpaceBadValue
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}
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return &MinFreeSpace{Type: AsPercent, Percent: float32(percent), Raw: s}, nil
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}
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if directSize, e := ParseBytes(s); e == nil {
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if directSize <= 100 {
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return nil, ErrMinFreeSpaceBadValue
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}
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return &MinFreeSpace{Type: AsBytes, Bytes: directSize, Raw: s}, nil
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}
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return nil, ErrMinFreeSpaceBadValue
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}
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