SQLSTATE[HY000] [2002] php_network_getaddresses: g

问题:

i download from https://github.com/luciddreamz/laravel laravel for openshift then upload over my repository over github . this code for connect to database not work. the problem is that load variable from .env file that locate in root of project

for solve this problem change.env

# local environment only
#   for production, see .openshift/.env

APP_ENV=APPLICATION_ENV
APP_DEBUG=true
APP_URL=OPENSHIFT_APP_DNS
APP_KEY=OPENSHIFT_SECRET_TOKEN

DB_DRIVER=mysql
DB_HOST=OPENSHIFT_MYSQL_DB_HOST
DB_PORT=OPENSHIFT_MYSQL_DB_PORT
DB_DATABASE=OPENSHIFT_APP_NAME
DB_USERNAME=OPENSHIFT_MYSQL_DB_USERNAME 
DB_PASSWORD=OPENSHIFT_MYSQL_DB_PASSWORD

CACHE_DRIVER=apc
SESSION_DRIVER=file

my error :SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known

createConnection('mysql:host=OPENSHIFT_MYSQL_DB_HOST;port=OPENSHIFT_MYSQL_DB_PORT;dbname=OPENSHIFT_APP_NAME', 
array('driver' => 'mysql', 
      'host' => 'OPENSHIFT_MYSQL_DB_HOST', 
      'port' => 'OPENSHIFT_MYSQL_DB_PORT', 
      'database' => 'OPENSHIFT_APP_NAME', 
      'username' => 'OPENSHIFT_MYSQL_DB_USERNAME', 
      'password' => 'OPENSHIFT_MYSQL_DB_PASSWORD', 
      'charset' => 'utf8',  
      'collation' => 'utf8_unicode_ci', 
      'prefix' => '', 
      'strict' => false, 
      'name' => 'mysql'), 
array('0', '2', '0', false, '0')) in MySqlConnector.php line 20

回答1:

First line of the error message describes the error type: "PDOException". The next line displays PDO::errorInfo, i.e:

1. SQLSTATE error code (a five characters alphanumeric identifier defined in the ANSI SQL standard).
2. Driver-specific error code.
3. Driver-specific error message.

• "HY000" is a general server error (see Server Error Codes and Messages in MySQL docs).
• "2002" is MySQL Client Error Code meaning "Can't connect to local MySQL server through socket" (see (Client Error Codes and Messages in MySQL docs).
• The driver specific error code and message ("php_network_getaddresses: getaddrinfo failed: Name or service not known") tell you that PDO is not able to resolve the host name.

The stack trace you attached, line 3, reveals that you did not specify the database connection parameters in the configuration file. The error show up when you test on local, right? You need to update /.env with the actual database connection parameters.

回答2:

Check your DB_HOST on your .env file

DB_HOST=http://localhost/ --> DB_HOST=localhost

---

php artisan config:clear it will help you, clear cached config

回答3:

It looks like you did not add a MySQL database to your application, OR you added it after you installed laravel. In that case, you need to stop & start (not restart) your application so that it will pick up your environment variables. (rhc app stop , rhc app start ). If you did not add a database yet, you will need to add one of the mysql cartridges, and then stop & start your application using the previously shown commands.

回答4:

I was having the same problem and everyone was talking about this is related to DNS configuration, which make sense, since your container maybe isn't knowing how to resolve the name of the domain where your database is.

I guess your can configure that at the moment you start your container, but I think it's better to config this once and for all.

I'm using Windows 10 and in this case docker's gui give us some facilities.

Just right click on docker's icon in the tray bar and select "Settings" item.

Then, on the Docker's window, select the "Network" section and change the DNS option from "Automatic" to "Fixed" and hit "Apply". Docker will restart itself after that. I putted the Google's DNS (8.8.8.8) and it worked fine to me.

Hope it helps.

回答5:

I'm using Laravel with Docker. I solved this problem by changing the value of DB_HOST from localhost to mysql.

DB_HOST=mysql

回答6:

We're using symfony with doctrine and we are in the process of automating deployment. I got this error when I simply hadn't provided the correct db creds in parameters.yml (I was running doctrine:migrations:migrate)

This thread has sent me on a bit of a wild goose chase, so I'm leaving this here so others might not have to.

回答7:

Just as on FYI to others suddenly experiencing this on an otherwise (previously) working Laravel installation:

My Laravel environment is on a Ubuntu VirtualBox hosted on a Win-10 laptop.

I used my phone to share Internet via USB and suddenly started experiencing this issue. I changed to using the phone as wireless hotspot and the issue went away. This is a nameserver/networking issue and is not specific to Laravel or MySQL.

回答8:

In my case, everything was set up correctly, but my Docker infrastructure needed more RAM. I'm using Docker for Mac, where default RAM was around 1 GB, and as MySQL uses around 1.5Gb of RAM ( and probably was crashing ??? ), changing the Docker RAM utilization level to 3-4 Gb solved the issue.