Mount self again inside the container

pkg/selfcontain/container.go

@@ -17,15 +17,21 @@ import (
 
 type Container struct {
 	config    *Config
+	self      string
 	container libcontainer.Container
 	process   libcontainer.Process
 }
 
 // Containerize the current process by runnig the current binary inside a container
 func New(config *Config) (*Container, error) {
+	// Resolve self from the host
+	self, err := os.Executable()
+	if err != nil {
+		return nil, err
+	}
 	// Prepare a libcontainer factory using the init path and args
 	factoryConfig := func(f *libcontainer.LinuxFactory) error {
-		f.InitPath = "/proc/self/exe"
+		f.InitPath = self
 		f.InitArgs = []string{os.Args[0], argInit}
 		return nil
 	}
@@ -34,6 +40,7 @@ func New(config *Config) (*Container, error) {
 		return nil, err
 	}
 	// Create and wrap the libcontainer instance
+	config.Mounts[self] = self
 	containerConfig, err := config.toLibcontainer()
 	if err != nil {
 		return nil, err
@@ -44,13 +51,14 @@ func New(config *Config) (*Container, error) {
 	}
 	return &Container{
 		config:    config,
+		self:      self,
 		container: container,
 	}, nil
 }
 
 func (c *Container) Start(args []string) error {
 	process := libcontainer.Process{
-		Args:   append([]string{"/proc/self/exe"}, args...),
+		Args:   append([]string{c.self}, args...),
 		Stdin:  os.Stdin,
 		Stdout: os.Stdout,
 		Stderr: os.Stderr,