Ejemplo n.º 1
0
// Init is the init process that first runs inside a new namespace to setup mounts, users, networking,
// and other options required for the new container.
func (ns *linuxNs) Init(container *libcontainer.Container, uncleanRootfs, console string, syncPipe *SyncPipe, args []string) error {
	rootfs, err := utils.ResolveRootfs(uncleanRootfs)
	if err != nil {
		return err
	}

	// We always read this as it is a way to sync with the parent as well
	context, err := syncPipe.ReadFromParent()
	if err != nil {
		syncPipe.Close()
		return err
	}
	syncPipe.Close()

	if console != "" {
		slave, err := system.OpenTerminal(console, syscall.O_RDWR)
		if err != nil {
			return fmt.Errorf("open terminal %s", err)
		}
		if err := dupSlave(slave); err != nil {
			return fmt.Errorf("dup2 slave %s", err)
		}
	}
	if _, err := system.Setsid(); err != nil {
		return fmt.Errorf("setsid %s", err)
	}
	if console != "" {
		if err := system.Setctty(); err != nil {
			return fmt.Errorf("setctty %s", err)
		}
	}
	// this is our best effort to let the process know that the parent has died and that it
	// should it should act on it how it sees fit
	if err := system.ParentDeathSignal(uintptr(syscall.SIGTERM)); err != nil {
		return fmt.Errorf("parent death signal %s", err)
	}
	if err := setupNewMountNamespace(rootfs, container.Mounts, console, container.ReadonlyFs, container.NoPivotRoot); err != nil {
		return fmt.Errorf("setup mount namespace %s", err)
	}
	if err := setupNetwork(container, context); err != nil {
		return fmt.Errorf("setup networking %s", err)
	}
	if err := system.Sethostname(container.Hostname); err != nil {
		return fmt.Errorf("sethostname %s", err)
	}
	if err := finalizeNamespace(container); err != nil {
		return fmt.Errorf("finalize namespace %s", err)
	}

	if err := apparmor.ApplyProfile(os.Getpid(), container.Context["apparmor_profile"]); err != nil {
		return err
	}
	return system.Execv(args[0], args[0:], container.Env)
}
Ejemplo n.º 2
0
// Init is the init process that first runs inside a new namespace to setup mounts, users, networking,
// and other options required for the new container.
func (ns *linuxNs) Init(container *libcontainer.Container, uncleanRootfs, console string, syncPipe *SyncPipe, args []string) error {
	rootfs, err := utils.ResolveRootfs(uncleanRootfs)
	if err != nil {
		return err
	}

	// We always read this as it is a way to sync with the parent as well
	context, err := syncPipe.ReadFromParent()
	if err != nil {
		syncPipe.Close()
		return err
	}
	syncPipe.Close()

	if console != "" {
		// close pipes so that we can replace it with the pty
		closeStdPipes()
		slave, err := system.OpenTerminal(console, syscall.O_RDWR)
		if err != nil {
			return fmt.Errorf("open terminal %s", err)
		}
		if err := dupSlave(slave); err != nil {
			return fmt.Errorf("dup2 slave %s", err)
		}
	}
	if _, err := system.Setsid(); err != nil {
		return fmt.Errorf("setsid %s", err)
	}
	if console != "" {
		if err := system.Setctty(); err != nil {
			return fmt.Errorf("setctty %s", err)
		}
	}

	/*
		if err := system.ParentDeathSignal(); err != nil {
			return fmt.Errorf("parent death signal %s", err)
		}
	*/
	if err := setupNewMountNamespace(rootfs, console, container.ReadonlyFs); err != nil {
		return fmt.Errorf("setup mount namespace %s", err)
	}
	if err := setupNetwork(container, context); err != nil {
		return fmt.Errorf("setup networking %s", err)
	}
	if err := system.Sethostname(container.Hostname); err != nil {
		return fmt.Errorf("sethostname %s", err)
	}
	if err := finalizeNamespace(container); err != nil {
		return fmt.Errorf("finalize namespace %s", err)
	}
	return system.Execv(args[0], args[0:], container.Env)
}
Ejemplo n.º 3
0
func OpenAndDup(consolePath string) error {
	slave, err := system.OpenTerminal(consolePath, syscall.O_RDWR)
	if err != nil {
		return fmt.Errorf("open terminal %s", err)
	}
	if err := system.Dup2(slave.Fd(), 0); err != nil {
		return err
	}
	if err := system.Dup2(slave.Fd(), 1); err != nil {
		return err
	}
	return system.Dup2(slave.Fd(), 2)
}
Ejemplo n.º 4
0
// Init is the init process that first runs inside a new namespace to setup mounts, users, networking,
// and other options required for the new container.
func (ns *linuxNs) Init(container *libcontainer.Container, uncleanRootfs, console string, syncPipe *SyncPipe, args []string) error {
	rootfs, err := utils.ResolveRootfs(uncleanRootfs)
	if err != nil {
		return err
	}

	// We always read this as it is a way to sync with the parent as well
	ns.logger.Printf("reading from sync pipe fd %d\n", syncPipe.child.Fd())
	context, err := syncPipe.ReadFromParent()
	if err != nil {
		syncPipe.Close()
		return err
	}
	ns.logger.Println("received context from parent")
	syncPipe.Close()

	if console != "" {
		ns.logger.Printf("setting up %s as console\n", console)
		slave, err := system.OpenTerminal(console, syscall.O_RDWR)
		if err != nil {
			return fmt.Errorf("open terminal %s", err)
		}
		if err := dupSlave(slave); err != nil {
			return fmt.Errorf("dup2 slave %s", err)
		}
	}
	if _, err := system.Setsid(); err != nil {
		return fmt.Errorf("setsid %s", err)
	}
	if console != "" {
		if err := system.Setctty(); err != nil {
			return fmt.Errorf("setctty %s", err)
		}
	}
	// this is our best effort to let the process know that the parent has died and that it
	// should it should act on it how it sees fit
	if err := system.ParentDeathSignal(uintptr(syscall.SIGTERM)); err != nil {
		return fmt.Errorf("parent death signal %s", err)
	}
	ns.logger.Println("setup mount namespace")
	if err := setupNewMountNamespace(rootfs, container.Mounts, console, container.ReadonlyFs, container.NoPivotRoot, container.Context["mount_label"]); err != nil {
		return fmt.Errorf("setup mount namespace %s", err)
	}
	if err := setupNetwork(container, context); err != nil {
		return fmt.Errorf("setup networking %s", err)
	}
	if err := system.Sethostname(container.Hostname); err != nil {
		return fmt.Errorf("sethostname %s", err)
	}
	if err := finalizeNamespace(container); err != nil {
		return fmt.Errorf("finalize namespace %s", err)
	}

	if profile := container.Context["apparmor_profile"]; profile != "" {
		ns.logger.Printf("setting apparmor profile %s\n", profile)
		if err := apparmor.ApplyProfile(os.Getpid(), profile); err != nil {
			return err
		}
	}
	runtime.LockOSThread()
	if err := label.SetProcessLabel(container.Context["process_label"]); err != nil {
		return fmt.Errorf("SetProcessLabel label %s", err)
	}
	ns.logger.Printf("execing %s\n", args[0])
	return system.Execv(args[0], args[0:], container.Env)
}