Add support for insecure docker registry (#131)

* Add support for insecure docker registry

Using --insecure-skip-tls-verify

Fixes #110

* Apply formatting

cmd/executor/cmd/root.go

@@ -32,13 +32,14 @@ import (
 )
 
 var (
-	dockerfilePath string
-	destination    string
-	srcContext     string
-	snapshotMode   string
-	bucket         string
-	logLevel       string
-	force          bool
+	dockerfilePath              string
+	destination                 string
+	srcContext                  string
+	snapshotMode                string
+	bucket                      string
+	dockerInsecureSkipTLSVerify bool
+	logLevel                    string
+	force                       bool
 )
 
 func init() {
@@ -47,6 +48,7 @@ func init() {
 	RootCmd.PersistentFlags().StringVarP(&bucket, "bucket", "b", "", "Name of the GCS bucket from which to access build context as tarball.")
 	RootCmd.PersistentFlags().StringVarP(&destination, "destination", "d", "", "Registry the final image should be pushed to (ex: gcr.io/test/example:latest)")
 	RootCmd.PersistentFlags().StringVarP(&snapshotMode, "snapshotMode", "", "full", "Set this flag to change the file attributes inspected during snapshotting")
+	RootCmd.PersistentFlags().BoolVarP(&dockerInsecureSkipTLSVerify, "insecure-skip-tls-verify", "", false, "Push to insecure registry ignoring TLS verify")
 	RootCmd.PersistentFlags().StringVarP(&logLevel, "verbosity", "v", constants.DefaultLogLevel, "Log level (debug, info, warn, error, fatal, panic")
 	RootCmd.PersistentFlags().BoolVarP(&force, "force", "", false, "Force building outside of a container")
 }
@@ -70,7 +72,7 @@ var RootCmd = &cobra.Command{
 			}
 			logrus.Warn("kaniko is being run outside of a container. This can have dangerous effects on your system")
 		}
-		if err := executor.DoBuild(dockerfilePath, srcContext, destination, snapshotMode); err != nil {
+		if err := executor.DoBuild(dockerfilePath, srcContext, destination, snapshotMode, dockerInsecureSkipTLSVerify); err != nil {
 			logrus.Error(err)
 			os.Exit(1)
 		}