How to use

generateRandomPassword

method

in

com.cloud.server.ManagementService

public String getPassword() {
  if (Strings.isNullOrEmpty(password)) {
    password = _mgr.generateRandomPassword();
  }
  return password;
}

@DB
protected void updateSystemvmPassword() {
  String userid = System.getProperty("user.name");
  if (!userid.startsWith("cloud")) {
    return;
  }
  if (!Boolean.valueOf(_configDao.getValue("system.vm.random.password"))) {
    return;
  }
  String already = _configDao.getValue("system.vm.password");
  if (already == null) {
    TransactionLegacy txn = TransactionLegacy.currentTxn();
    try {
      String rpassword = _mgrService.generateRandomPassword();
      String wSql = "INSERT INTO `cloud`.`configuration` (category, instance, component, name, value, description) "
      + "VALUES ('Secure','DEFAULT', 'management-server','system.vm.password', ?,'randmon password generated each management server starts for system vm')";
      PreparedStatement stmt = txn.prepareAutoCloseStatement(wSql);
      stmt.setString(1, DBEncryptionUtil.encrypt(rpassword));
      stmt.executeUpdate();
      s_logger.info("Updated systemvm password in database");
    } catch (SQLException e) {
      s_logger.error("Cannot retrieve systemvm password", e);
    }
  }
}

  @Override
  public void execute() throws ResourceUnavailableException, InsufficientCapacityException{
    password = _mgr.generateRandomPassword();
    CallContext.current().setEventDetails("Vm Id: "+getId());
    UserVm result = _userVmService.resetVMPassword(this, password);
    if (result != null){
      UserVmResponse response = _responseGenerator.createUserVmResponse(ResponseView.Full, "virtualmachine", result).get(0);
      response.setResponseName(getCommandName());
      setResponseObject(response);
    } else {
      throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to reset vm password");
    }
  }
}

  @Override
  public void execute() throws ResourceUnavailableException, InsufficientCapacityException {
    password = _mgr.generateRandomPassword();
    CallContext.current().setEventDetails("Vm Id: " + getId());
    UserVm result = _userVmService.resetVMPassword(this, password);
    if (result != null){
      UserVmResponse response = _responseGenerator.createUserVmResponse(ResponseView.Restricted, "virtualmachine", result).get(0);
      response.setResponseName(getCommandName());
      setResponseObject(response);
    } else {
      throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to reset vm password");
    }
  }
}

  password = DBEncryptionUtil.decrypt(vm.getDetail("password"));
} else {
  password = _mgr.generateRandomPassword();
  vm.setPassword(password);

String sshPublicKey = s.getPublicKey();
if (template != null && template.isEnablePassword()) {
  password = _mgr.generateRandomPassword();

password = _mgr.generateRandomPassword();
boolean result = resetVMPasswordInternal(vmId, password);
if (!result) {

@Override
public void execute() throws ResourceUnavailableException, InsufficientCapacityException {
  password = _mgr.generateRandomPassword();
  CallContext.current().setEventDetails("Vm Id: " + getId());
  final UserVm result = _userVmService.resetVMPassword(this, password);
  if (result != null) {
    final UserVmResponse response = _responseGenerator.createUserVmResponse(ResponseView.Restricted, "virtualmachine", result).get(0);
    response.setResponseName(getCommandName());
    setResponseObject(response);
  } else {
    throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to reset vm password");
  }
}

  @Override
  public void execute() throws ResourceUnavailableException, InsufficientCapacityException {
    password = _mgr.generateRandomPassword();
    CallContext.current().setEventDetails("Vm Id: " + getId());
    final UserVm result = _userVmService.resetVMPassword(this, password);
    if (result != null) {
      final UserVmResponse response = _responseGenerator.createUserVmResponse(ResponseView.Full, "virtualmachine", result).get(0);
      response.setResponseName(getCommandName());
      setResponseObject(response);
    } else {
      throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to reset vm password");
    }
  }
}