Merge pull request #520 from rhatdan/slave

Change mount point propogation to default to slave

configs/config.go

@@ -37,6 +37,9 @@ type Config struct {
 	// bind mounts are writtable.
 	Readonlyfs bool `json:"readonlyfs"`
 
+	// Privatefs will mount the container's rootfs as private where mount points from the parent will not propogate
+	Privatefs bool `json:"privatefs"`
+
 	// Mounts specify additional source and destination paths that will be mounted inside the container's
 	// rootfs and mount namespace if specified
 	Mounts []*Mount `json:"mounts"`

rootfs_linux.go

@@ -248,9 +248,9 @@ func mknodDevice(dest string, node *configs.Device) error {
 }
 
 func prepareRoot(config *configs.Config) error {
-	flag := syscall.MS_PRIVATE | syscall.MS_REC
-	if config.NoPivotRoot {
-		flag = syscall.MS_SLAVE | syscall.MS_REC
+	flag := syscall.MS_SLAVE | syscall.MS_REC
+	if config.Privatefs {
+		flag = syscall.MS_PRIVATE | syscall.MS_REC
 	}
 	if err := syscall.Mount("", "/", "", uintptr(flag), ""); err != nil {
 		return err