Function getPersistentVolumePath

src/slave/paths.cpp:699–722

string getPersistentVolumePath(
    const string& workDir,
    const string& role,
    const string& persistenceId)
{
  // Role names might contain literal `/` if the role is part of a
  // role hierarchy. Since `/` is not allowed in a directory name
  // under Linux, we could either represent such sub-roles with
  // sub-directories, or encode the `/` with some other identifier.
  // To clearly distinguish artifacts in a volume from subroles we
  // choose to encode `/` in role names as ` ` (literal space) as
  // opposed to using subdirectories. Whitespace is not allowed as
  // part of a role name. Also, practically all modern filesystems can
  // use ` ` in filenames. There are some limitations in auxilary
  // tooling which are not relevant here, e.g., many shell constructs
  // require quotes around filesnames containing ` `; containers using
  // persistent volumes would not see the ` ` as the role-related part
  // of the path would not be part of a mapping into the container
  // sandbox.
  string serializableRole = strings::replace(role, "/", " ");

  return path::join(
      workDir, "volumes", "roles", serializableRole, persistenceId);
}


string getPersistentVolumePath(