illuminate/database 库如何设置数据库连接超时时间

用illuminate/database做数据库连接，DB::connection('db')->getPdo(), 当ip不存在或连不上等情况，超时需要等待的时间过长

查了不是pdo的说明，经测试，以下方法设置超时时间

1. mysql

   $config = [
       'driver' => 'mysql',
       'host' => $this->host,
       'port' => $this->port,
       'username' => $this->username,
       'password' => $this->password,
       'database' => $this->database,
       'charset' => $this->encoded,
       'prefix' => '',
       'strict' => false,
       'engine' => null,
       'options' => [
           // mysql连接3s超时设置
           \PDO::ATTR_TIMEOUT => 3
       ]
   ];

2. oracle的oci8（用的是yajra/laravel-oci8）

   $config = [
       'driver'        => 'oracle',
       'tns'           => "(DESCRIPTION =
   (CONNECT_TIMEOUT=1)(RETRY_COUNT=1)
   (ADDRESS = (PROTOCOL = TCP)(HOST = $this->host)(PORT = $this->port))
   (CONNECT_DATA =
   (SERVER = DEDICATED)
   (SERVICE_NAME = $this->service_name)
   )
   )",
       'host'          => $this->host,
       'port'          => $this->port,
       'database'      => $this->mode,
       'username'      => $this->username,
       'password'      => $this->password,
       'charset'       => $this->encoded,
       'prefix'        => '',
       'prefix_schema' => '',
   ];

3mssql找到解决方案，不但是不知道怎么通过laravel 的 connection配置
https://stackoverrun.com/cn/q/9972324

目前临时解决方案，根据调试源码得出的偏方

$config = [
    'driver' => 'sqlsrv',
    'host' => $this->host,
    'port' => $this->port,
    'username' => $this->username,
    'password' => $this->password,
    // 附在database，加入超时限制
    'database' => $this->database . ';LoginTimeout=2',
    'charset' => $this->encoded,
    'prefix' => '',
];

各位猿友有没有知道更好的解决方案，提点一下