Add a new flag to cleanup the filesystem at the end

README.md

@@ -317,6 +317,10 @@ If `--destination=gcr.io/kaniko-project/test`, then cached layers will be stored
 
 _This flag must be used in conjunction with the `--cache=true` flag._
 
+#### --cleanup
+
+Set this flag to cleanup the filesystem at the end, leaving a clean kaniko container (if you want to build multiple images in the same container, using the debug kaniko image)
+
 ### Debug Image
 
 The kaniko executor image is based off of scratch and doesn't contain a shell.

cmd/executor/cmd/root.go

@@ -97,6 +97,7 @@ func addKanikoOptionsFlags(cmd *cobra.Command) {
 	RootCmd.PersistentFlags().BoolVarP(&opts.NoPush, "no-push", "", false, "Do not push the image to the registry")
 	RootCmd.PersistentFlags().StringVarP(&opts.CacheRepo, "cache-repo", "", "", "Specify a repository to use as a cache, otherwise one will be inferred from the destination provided")
 	RootCmd.PersistentFlags().BoolVarP(&opts.Cache, "cache", "", false, "Use cache when building image")
+	RootCmd.PersistentFlags().BoolVarP(&opts.Cleanup, "cleanup", "", false, "Clean the filesystem at the end")
 }
 
 // addHiddenFlags marks certain flags as hidden from the executor help text

pkg/config/options.go

@@ -33,4 +33,5 @@ type KanikoOptions struct {
 	Reproducible   bool
 	NoPush         bool
 	Cache          bool
+	Cleanup        bool
 }

pkg/executor/build.go

@@ -264,6 +264,11 @@ func DoBuild(opts *config.KanikoOptions) (v1.Image, error) {
 					return nil, err
 				}
 			}
+			if opts.Cleanup {
+				if err = util.DeleteFilesystem(); err != nil {
+					return nil, err
+				}
+			}
 			return sourceImage, nil
 		}
 		if stage.SaveStage {