Function validateUniquePersistenceID

src/master/validation.cpp:914–935

Validates the uniqueness of the persistence IDs used in the given resources. They need to be unique per role on each slave.

// Validates the uniqueness of the persistence IDs used in the given
// resources. They need to be unique per role on each slave.
Option<Error> validateUniquePersistenceID(
    const Resources& resources)
{
  hashmap<string, hashset<string>> persistenceIds;

  // Check duplicated persistence ID within the given resources.
  Resources volumes = resources.persistentVolumes();

  foreach (const Resource& volume, volumes) {
    const string& role = Resources::reservationRole(volume);
    const string& id = volume.disk().persistence().id();

    if (persistenceIds.contains(role) &&
        persistenceIds[role].contains(id)) {
      return Error("Persistence ID '" + id + "' is not unique");
    }

    persistenceIds[role].insert(id);
  }

  return None();
}


// Validates that revocable and non-revocable