@@ -9,6 +9,7 @@ import (

 	"os"

 	"path/filepath"

 	"strconv"

+	"strings"

 )

 // PIDFile is a file used to store the process ID of a running process.

@@ -17,9 +18,10 @@ type PIDFile struct {

 }

 func checkPIDFileAlreadyExists(path string) error {

-	if pidString, err := ioutil.ReadFile(path); err == nil {

-		if pid, err := strconv.Atoi(string(pidString)); err == nil {

-			if _, err := os.Stat(filepath.Join("/proc", string(pid))); err == nil {

+	if pidByte, err := ioutil.ReadFile(path); err == nil {

+		pidString := strings.TrimSpace(string(pidByte))

+		if pid, err := strconv.Atoi(pidString); err == nil {

+			if _, err := os.Stat(filepath.Join("/proc", strconv.Itoa(pid))); err == nil {

 				return fmt.Errorf("pid file found, ensure docker is not running or delete %s", path)

 			}

 		}