save snaphots to tmp dir (#1662)

pkg/config/init.go

@@ -22,10 +22,12 @@ import (
 
 var RootDir string
 var KanikoDir string
+var TempDir string
 var IgnoreListPath string
 
 func init() {
 	RootDir = constants.RootDir
 	KanikoDir = constants.KanikoDir
+	TempDir = constants.TempDir
 	IgnoreListPath = constants.IgnoreListPath
 }

pkg/constants/constants.go

@@ -23,6 +23,9 @@ const (
 	//KanikoDir is the path to the Kaniko directory
 	KanikoDir = "/kaniko"
 
+	// TempDir is the path to the temp directory
+	TempDir = "/kaniko/tmp"
+
 	IgnoreListPath = "/proc/self/mountinfo"
 
 	Author = "kaniko"

pkg/snapshot/snapshot.go

@@ -61,7 +61,7 @@ func (s *Snapshotter) Key() (string, error) {
 // TakeSnapshot takes a snapshot of the specified files, avoiding directories in the ignorelist, and creates
 // a tarball of the changed files. Return contents of the tarball, and whether or not any files were changed
 func (s *Snapshotter) TakeSnapshot(files []string, shdCheckDelete bool) (string, error) {
-	f, err := ioutil.TempFile(config.KanikoDir, "")
+	f, err := ioutil.TempFile(config.TempDir, "")
 	if err != nil {
 		return "", err
 	}
@@ -143,7 +143,7 @@ func (s *Snapshotter) TakeSnapshotFS() (string, error) {
 
 func (s *Snapshotter) getSnashotPathPrefix() string {
 	if snapshotPathPrefix == "" {
-		return config.KanikoDir
+		return config.TempDir
 	}
 	return snapshotPathPrefix
 }