AWS Amazon Server：cURL错误无法解析主机

Question

I've been using a fanless ubuntu server for a couple of months and been transferred my Laravel API Passport to different servers like Ubuntu and for development Windows.

The current version of my api is working fine on these servers. Not until when I transferred the laravel project to my AWS Amazon server and getting the error like this

{
"message": "cURL error 6: Could not resolve host: api-a.mydomain.comoauth (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)",
"exception": "GuzzleHttp\\Exception\\ConnectException",
"file": "/var/www/html/api_tk_a/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php",
"line": 185,
"trace": [
{
   ....some line of multiple errors
}
]

}

I tried to add some line of code to my etc/hosts file

like this

52.***.***.205 api-a.mydomain.com 52.***.***.205 api-b.mydomain.com

or

127.0.0.1 api-a.mydomain.com 127.0.0.1 api-b.mydomain.com

tried also my inet addr:171.*.**.** to put on my hosts file still getting the same error

I have 2 different api that's why there's a and b

But nothing of these works.

Can anyone point out the reason why I'm getting this error.

Some thread says this has nothing to do with the Guzzle but clearly states to the IP and DNS. But I can't find a good way to figure this out.

UPDATE

My .env file has something like this

APP_NAME=Laravel
APP_ENV=local
APP_KEY=base64:1AEVUl5JHMzLkhxU7MDlDHtfZ6KB9UybjzUxLaYp9vg=
APP_DEBUG=true
APP_URL=http://localhost

I tried to put the APP_URL as https://api-a.mydomain.com still not working..

API CODE This code is working fine

$http = new Client;
        $response = $http->post(url('oauth/token'), [
            'form_params' => [
            'grant_type' => 'password',
            'client_id' => '2',
            'client_secret' => '8mEsN0RZkljKZlbiJFfnNKahcbcOVkoQVG7C2Xwl',
            'username' => $user->email,
            'password' => $request->password,
            'scope' => '',
            ],
        ]);

This is my routes/api.php

use Illuminate\Http\Request;
Route::post('/login','Auth\Api\AuthController@login');

EC2 Ping

Answer 1

I found a solution:

I used $http->post('https://api-a.mydomain.com' . '/oauth/token', [

Laravel passport trying to get oauth/token. Guzzle keeps hanging, also on other Guzzle calls