“数据库主机数组为空."在AWS Elastic Beanstalk上部署Laravel项目之后 [英] "Database hosts array is empty." after deploying Laravel project on AWS Elastic Beanstalk

问题描述

我使用Elastic Beanstalk将项目部署到了​​一个AWS EC2实例.我使用了本教程

I deployed my project to an AWS EC2 instance using Elastic Beanstalk. I used this tutorial https://www.youtube.com/watch?v=ISVaMijczKc as a reference while deploying. I am following everything as it is in the tutorial but I ended up with an error.

数据库主机数组为空.(SQL:从*中选择* resource_categories )

以下是我的代码.

database.php

<?php

define('RDS_HOSTNAME', $_SERVER['RED_HOSTNAME']);
define('RDS_USERNAME', $_SERVER['RED_USERNAME']);
define('RDS_PASSWORD', $_SERVER['RED_PASSWORD']);
define('RDS_DB_NAME', $_SERVER['RED_DB_NAME']);

return [

    'default' => env('DB_CONNECTION', 'mysql'),

    'connections' => [

        'sqlite' => [
            'driver' => 'sqlite',
            'database' => env('DB_DATABASE', database_path('database.sqlite')),
            'prefix' => '',
            'foreign_key_constraints' => env('DB_FOREIGN_KEYS', true),
        ],

        'mysql' => [
            'driver' => 'mysql',
            'host' => RDS_HOSTNAME,
            'port' => env('DB_PORT', '3306'),
            'database' => RDS_DB_NAME,
            'username' => RDS_USERNAME,
            'password' => RDS_PASSWORD,
            'unix_socket' => env('DB_SOCKET', ''),
            'charset' => 'utf8',
            'collation' => 'utf8_unicode_ci',
            'prefix' => '',
            'prefix_indexes' => true,
            'strict' => false,
            'engine' => null,
            'options' => extension_loaded('pdo_mysql') ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
            ]) : [],
        ],

        'pgsql' => [
            'driver' => 'pgsql',
            'host' => env('DB_HOST', '127.0.0.1'),
            'port' => env('DB_PORT', '5432'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'charset' => 'utf8',
            'prefix' => '',
            'prefix_indexes' => true,
            'schema' => 'public',
            'sslmode' => 'prefer',
        ],

        'sqlsrv' => [
            'driver' => 'sqlsrv',
            'host' => env('DB_HOST', 'localhost'),
            'port' => env('DB_PORT', '1433'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'charset' => 'utf8',
            'prefix' => '',
            'prefix_indexes' => true,
        ],
    ],

    'migrations' => 'migrations',

    'redis' => [

        'client' => env('REDIS_CLIENT', 'predis'),

        'options' => [
            'cluster' => env('REDIS_CLUSTER', 'predis'),
        ],

        'default' => [
            'host' => env('REDIS_HOST', '127.0.0.1'),
            'password' => env('REDIS_PASSWORD', null),
            'port' => env('REDIS_PORT', 6379),
            'database' => env('REDIS_DB', 0),
        ],

        'cache' => [
            'host' => env('REDIS_HOST', '127.0.0.1'),
            'password' => env('REDIS_PASSWORD', null),
            'port' => env('REDIS_PORT', 6379),
            'database' => env('REDIS_CACHE_DB', 1),
        ],

    ],

];

.ENV

.ENV

APP_NAME="MyProject"
APP_ENV=development
APP_KEY=base64:FlVBd61BUEzVx6ACa6OOn3Jrp4z+VRpug+F1K1ZeJOs=
APP_DEBUG=true
APP_URL=http://localhost

LOG_CHANNEL=stack

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=myDB
DB_USERNAME=root
DB_PASSWORD=

推荐答案

我遇到了类似问题，MarkB帮助了我.SSH进入实例时，必须遵循一个特定的步骤.

I've gone through a similar problem and MarkB helped me. There's a specific procedure you must follow when you SSH into the instance.

如果您运行

export

您会看到在Linux shell中没有名为RDS_HOSTNAME的变量，这就是为什么您会收到该错误.

you can see that there's no variable named RDS_HOSTNAME in that Linux shell and that's why you're getting that error.

如果您运行

/opt/elasticbeanstalk/bin/get-config environment

您可以看到带有属性列表的对象，包括该RDS_HOSTNAME.

you can see an object with the list of properties, including that RDS_HOSTNAME.

如果您运行

/opt/elasticbeanstalk/bin/get-config environment -k RDS_USERNAME

您将获得与该特定属性关联的值.该值需要保存在变量中并导出，以便其他命令可以识别它.

you get the value associated with that particular property. This value needs to be saved in a variable and exported so that other commands can recognize it.

如果您运行

export RDS_USERNAME="value"

然后在您运行时

export

您会看到它现在可用.

现在，如果您运行所需的命令，则该命令可能会起作用(您可能需要对RDS_USERNAME，RDS_PASSWORD和RDS_DB_NAME重复此操作).

Now if you run the command you wanted it's likely gonna work (you might need to repeat this for RDS_USERNAME, RDS_PASSWORD and RDS_DB_NAME).

注意:如果这样不起作用，那么您的问题可能类似于此问题a>.

Note: if that didn't work, then your problem might be similar to this one.

这篇关于“数据库主机数组为空."在AWS Elastic Beanstalk上部署Laravel项目之后的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！