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util.go
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util.go
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package util
import (
"crypto/sha512"
"encoding/hex"
"fmt"
"io"
"os"
"os/exec"
"regexp"
"strings"
"syscall"
"time"
"github.com/google/uuid"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.uber.org/multierr"
"k8s.io/apimachinery/pkg/util/validation"
"github.com/longhorn/go-common-libs/proc"
)
func RoundUp(num, base uint64) uint64 {
if num <= 0 {
return base
}
r := num % base
if r == 0 {
return num
}
return num - r + base
}
const (
EngineRandomIDLenth = 8
EngineSuffix = "-e"
)
func GetVolumeNameFromEngineName(engineName string) string {
reg := regexp.MustCompile(fmt.Sprintf(`([^"]*)%s-[A-Za-z0-9]{%d,%d}$`, EngineSuffix, EngineRandomIDLenth, EngineRandomIDLenth))
return reg.ReplaceAllString(engineName, "${1}")
}
func BytesToMiB(bytes uint64) uint64 {
return bytes / 1024 / 1024
}
func RemovePrefix(path, prefix string) string {
if strings.HasPrefix(path, prefix) {
return strings.TrimPrefix(path, prefix)
}
return path
}
func UUID() string {
return uuid.New().String()
}
func IsSPDKTargetProcessRunning() (bool, error) {
cmd := exec.Command("pgrep", "-f", "spdk_tgt")
if _, err := cmd.Output(); err != nil {
if exitErr, ok := err.(*exec.ExitError); ok {
status, ok := exitErr.Sys().(syscall.WaitStatus)
if ok {
exitCode := status.ExitStatus()
if exitCode == 1 {
return false, nil
}
}
}
return false, errors.Wrap(err, "failed to check spdk_tgt process")
}
return true, nil
}
func StartSPDKTgtDaemon() error {
cmd := exec.Command("spdk_tgt")
cmd.SysProcAttr = &syscall.SysProcAttr{
Setsid: true,
}
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Start()
if err != nil {
return fmt.Errorf("failed to start spdk_tgt daemon: %w", err)
}
return nil
}
func StopSPDKTgtDaemon(timeout time.Duration) error {
processes, err := proc.FindProcessByCmdline("spdk_tgt")
if err != nil {
return errors.Wrap(err, "failed to find spdk_tgt")
}
var errs error
for _, process := range processes {
if err := process.Signal(syscall.SIGTERM); err != nil {
errs = multierr.Append(errs, errors.Wrapf(err, "failed to send SIGTERM to spdk_tgt %v", process.Pid))
} else {
done := make(chan error, 1)
go func() {
_, err := process.Wait()
done <- err
close(done)
}()
select {
case <-time.After(timeout):
logrus.Warnf("spdk_tgt %v failed to exit in time, sending SIGKILL", process.Pid)
err = process.Signal(syscall.SIGKILL)
if err != nil {
errs = multierr.Append(errs, errors.Wrapf(err, "failed to send SIGKILL to spdk_tgt %v", process.Pid))
}
case err := <-done:
if err != nil {
errs = multierr.Append(errs, errors.Wrapf(err, "spdk_tgt %v exited with error", process.Pid))
} else {
logrus.Infof("spdk_tgt %v exited successfully", process.Pid)
}
}
}
}
return errs
}
func GetFileChunkChecksum(filePath string, start, size int64) (string, error) {
f, err := os.Open(filePath)
if err != nil {
return "", err
}
defer f.Close()
if _, err = f.Seek(start, 0); err != nil {
return "", err
}
h := sha512.New()
if _, err := io.CopyN(h, f, size); err != nil {
return "", err
}
return hex.EncodeToString(h.Sum(nil)), nil
}
func ParseLabels(labels []string) (map[string]string, error) {
result := map[string]string{}
for _, label := range labels {
kv := strings.SplitN(label, "=", 2)
if len(kv) != 2 {
return nil, fmt.Errorf("invalid label not in <key>=<value> format %v", label)
}
key := kv[0]
value := kv[1]
if errList := validation.IsQualifiedName(key); len(errList) > 0 {
return nil, fmt.Errorf("invalid key %v for label: %v", key, errList[0])
}
// We don't need to validate the Label value since we're allowing for any form of data to be stored, similar
// to Kubernetes Annotations. Of course, we should make sure it isn't empty.
if value == "" {
return nil, fmt.Errorf("invalid empty value for label with key %v", key)
}
result[key] = value
}
return result, nil
}
func Now() string {
return time.Now().UTC().Format(time.RFC3339)
}
func UnescapeURL(url string) string {
// Deal with escape in url inputted from bash
result := strings.Replace(url, "\\u0026", "&", 1)
result = strings.Replace(result, "u0026", "&", 1)
result = strings.TrimLeft(result, "\"'")
result = strings.TrimRight(result, "\"'")
return result
}
func CombineErrors(errorList ...error) (retErr error) {
for _, err := range errorList {
if err != nil {
if retErr != nil {
retErr = fmt.Errorf("%v, %v", retErr, err)
} else {
retErr = err
}
}
}
return retErr
}
func Min(x, y uint64) uint64 {
if x < y {
return x
}
return y
}
type ReplicaError struct {
Address string
Message string
}
func NewReplicaError(address string, err error) ReplicaError {
return ReplicaError{
Address: address,
Message: err.Error(),
}
}
func (e ReplicaError) Error() string {
return fmt.Sprintf("%v: %v", e.Address, e.Message)
}
type TaskError struct {
ReplicaErrors []ReplicaError
}
func NewTaskError(res ...ReplicaError) *TaskError {
return &TaskError{
ReplicaErrors: append([]ReplicaError{}, res...),
}
}
func (t *TaskError) Error() string {
var errs []string
for _, re := range t.ReplicaErrors {
errs = append(errs, re.Error())
}
if errs == nil {
return "Unknown"
}
if len(errs) == 1 {
return errs[0]
}
return strings.Join(errs, "; ")
}
func (t *TaskError) Append(re ReplicaError) {
t.ReplicaErrors = append(t.ReplicaErrors, re)
}
func (t *TaskError) HasError() bool {
return len(t.ReplicaErrors) != 0
}