// ConfigureTaskDir creates the necessary directory structure for a proper
// chroot. cleanTaskDir should be called after.
func (e *LinuxExecutor) ConfigureTaskDir(taskName string, alloc *allocdir.AllocDir) error {
e.taskName = taskName
e.allocDir = alloc.AllocDir
taskDir, ok := alloc.TaskDirs[taskName]
if !ok {
fmt.Errorf("Couldn't find task directory for task %v", taskName)
}
e.taskDir = taskDir
if err := alloc.MountSharedDir(taskName); err != nil {
return err
}
// Embed ourselves if this is a test. This needs to be done so the test
// binary is inside the chroot.
if isTest(&e.cmd) {
bin := e.cmd.Args[0]
alloc.Embed(taskName, map[string]string{bin: bin})
}
if err := alloc.Embed(taskName, chrootEnv); err != nil {
return err
}
// Mount dev
dev := filepath.Join(taskDir, "dev")
if !e.pathExists(dev) {
if err := os.Mkdir(dev, 0777); err != nil {
return fmt.Errorf("Mkdir(%v) failed: %v", dev, err)
}
if err := syscall.Mount("", dev, "devtmpfs", syscall.MS_RDONLY, ""); err != nil {
return fmt.Errorf("Couldn't mount /dev to %v: %v", dev, err)
}
}
// Mount proc
proc := filepath.Join(taskDir, "proc")
if !e.pathExists(proc) {
if err := os.Mkdir(proc, 0777); err != nil {
return fmt.Errorf("Mkdir(%v) failed: %v", proc, err)
}
if err := syscall.Mount("", proc, "proc", syscall.MS_RDONLY, ""); err != nil {
return fmt.Errorf("Couldn't mount /proc to %v: %v", proc, err)
}
}
// Set the tasks AllocDir environment variable.
env, err := environment.ParseFromList(e.cmd.Env)
if err != nil {
return err
}
env.SetAllocDir(filepath.Join("/", allocdir.SharedAllocName))
env.SetTaskLocalDir(filepath.Join("/", allocdir.TaskLocal))
e.cmd.Env = env.List()
return nil
}
func (e *LinuxExecutor) ConfigureTaskDir(taskName string, alloc *allocdir.AllocDir) error {
e.taskName = taskName
taskDir, ok := alloc.TaskDirs[taskName]
if !ok {
fmt.Errorf("Couldn't find task directory for task %v", taskName)
}
e.taskDir = taskDir
if err := alloc.MountSharedDir(taskName); err != nil {
return err
}
if err := alloc.Embed(taskName, chrootEnv); err != nil {
return err
}
// Mount dev
dev := filepath.Join(taskDir, "dev")
if err := os.Mkdir(dev, 0777); err != nil {
return fmt.Errorf("Mkdir(%v) failed: %v", dev, err)
}
if err := syscall.Mount("", dev, "devtmpfs", syscall.MS_RDONLY, ""); err != nil {
return fmt.Errorf("Couldn't mount /dev to %v: %v", dev, err)
}
// Mount proc
proc := filepath.Join(taskDir, "proc")
if err := os.Mkdir(proc, 0777); err != nil {
return fmt.Errorf("Mkdir(%v) failed: %v", proc, err)
}
if err := syscall.Mount("", proc, "proc", syscall.MS_RDONLY, ""); err != nil {
return fmt.Errorf("Couldn't mount /proc to %v: %v", proc, err)
}
// Set the tasks AllocDir environment variable.
env, err := environment.ParseFromList(e.Cmd.Env)
if err != nil {
return err
}
env.SetAllocDir(filepath.Join("/", allocdir.SharedAllocName))
env.SetTaskLocalDir(filepath.Join("/", allocdir.TaskLocal))
e.Cmd.Env = env.List()
e.alloc = alloc
e.mounts = true
return nil
}