SQLSTATE[HY000] [2002] Connection refused

I’ve an App of a Docker Laravel installation that communicate with two Vue.js apps via mySql database. When I call the query from the frontend apps I get in console the following error:

{"errors":[{"message":"Internal server error","extensions":{"category":"internal"},"locations":[{"line":2,"column":3}],"path":["clients"]}],"extensions":{"lighthouse_subscriptions":{"version":2,"channel":null}}}

Checking the laravel.log on the DigitalOcean App I see this error:

[2022-11-19 08:12:40] production.ERROR: SQLSTATE[HY000] [2002] Connection refused (SQL: select * from `users` where `user_type` like CLIENT) {"exception":"[object] (Illuminate\\Database\\QueryException(code: 2002): SQLSTATE[HY000] [2002] Connection refused (SQL: select * from `users` where `user_type` like CLIENT) at /workspace/vendor/laravel/framework/src/Illuminate/Database/Connection.php:759)

My App settings has the App Spec variables like that

    scope: RUN_TIME
    value: xxxxx
  - key: DB_PORT
    scope: RUN_TIME
    value: "3306"
  - key: DB_HOST
    scope: RUN_TIME
  - key: DB_USERNAME
    scope: RUN_TIME
    value: xxxxxxx
  - key: DB_PASSWORD
    scope: RUN_TIME
    value: xxxxxxx

on the Laravel side, the config/database.php

'mysql' => [
            'driver' => 'mysql',
            'url' => env('DATABASE_URL'),
            'host' => env('DB_HOST', ''),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'xxxxxx'),
            'username' => env('DB_USERNAME', 'xxxxxx'),
            'password' => env('DB_PASSWORD', 'xxxxxx'),
            'unix_socket' => env('DB_SOCKET', ''),
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'prefix_indexes' => true,
            'strict' => true,
            'engine' => null,
            'options' => extension_loaded('pdo_mysql') ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
            ]) : [],

on the Vue.js side

const apolloClient = new ApolloClient({
  link: ApolloLink.from([
      uri: 'DigitalOcenAppURI/graphql',

I wonder where is the problem. Maybe mysql is not installed on the DigitalOcean app??

Thank you for the help

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Bobby Iliev
Site Moderator
Site Moderator badge
November 21, 2022

Hi there,

I would recommend not running MySQL inside the App Platform itself, as the storage there is ephemeral storage. This means that you will lose your data every time you deploy a new version of your app.

What you could do is to use a Managed MySQL database and configure your environment variables so that your Laravel app connects to the managed database cluster and persists your data correctly.

You can follow the steps here on how to deploy Laravel to the App Platform:

Hope that this helps!