Laravel 数据库读写分离

config/database.php

...
'mysql' => [
    'driver'    => 'mysql',
    'host'      => env('DB_HOST', 'localhost'),
    'database'  => env('DB_DATABASE', 'forge'),
    'username'  => env('DB_USERNAME', 'forge'),
    'password'  => env('DB_PASSWORD', ''),
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
    'strict'    => false,
    'engine'    => null,
],
/* test master/slave */
'laravel_test_ms'=>array(
    'read'=>array(
        'host'      => '10.0.13.46',
        'username'  => 'laravel_reader',
        'password'  => 'qwerqwer123',
    ),
    'write'=>array(
        'host'      => '10.0.13.46',
        'username'  => 'laravel_writer',
        'password'  => '1qaz1qaz123',
    ),
    'driver'    => 'mysql',
    'database'  => 'laravel',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
    'strict'    => false,
    'engine'    => null,
),
/* 多数据库连接-读写分离-手动 */
'laravel_reader'=>array(
    'driver'    => 'mysql',
    'host'      => '10.0.13.46',
    'database'  => 'laravel',
    'username'  => 'laravel_reader',
    'password'  => 'qwerqwer123',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
    'strict'    => false,
    'engine'    => null,
),
'laravel_writer'=>array(
    'driver'    => 'mysql',
    'host'      => '10.0.13.46',
    'database'  => 'laravel',
    'username'  => 'laravel_writer',
    'password'  => '1qaz1qaz123',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
    'strict'    => false,
    'engine'    => null,
),
...

app/Http/routes.php

Route::get('tongji/info', 'TongjiController@info');
Route::get('tongji/multi', 'TongjiController@multi');
Route::get('tongji/ms', 'TongjiController@ms');

app/Http/Controllers/TongjiController.php

<?php
namespace App\Http\Controllers;
use App\Tongji;
class TongjiController extends Controller
{

	/**
	 * 多数据库连接-读写分离-手动
	 * @access	public
	 * @author	zhaoyingnan	2016-09-18 17:05
	 * @return	mix
	 * @note
	 **/
	public function multi()
	{
		return Tongji::mMultiDBConfTest(2);
	}
	/**
	 * 框架自动读写分离
	 * @access	public
	 * @author	zhaoyingnan	2016-09-18 17:53
	 * @param	int			$iVar
	 * @return	mix
	 * @note
	 **/
	public function ms()
	{
		return Tongji::mMasterSlaveTest(1);
	}
}
?>

app/Tongji.php

<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
#use Illuminate\Support\Facades\DB;
use DB;
class Tongji extends Model
{
    /**
     * 1.读写分离-多数据库连接(database.php)-手动
     * @access  public
     * @author  zhaoyingnan 2016-09-18 17:00
     * @param   int         $iType
     * @return  mix
     * @note
     **/
    static function mMultiDBConfTest($iType = 1)
    {
        # 数据库权限设置
        # grant select on laravel.* to laravel_reader@'%' identified by 'qwerqwer123';
        # grant select,insert,update,delete on laravel.* to laravel_writer@'%' identified by '1qaz1qaz123';
        # flush privileges;
        if($iType == 1)
        {
            # reader
            return DB::connection('laravel_reader')->select('select * from student limit 1');
        }
        else
        {
            # writer
            return DB::connection('laravel_writer')->update('update student set `age`=:age where id=:id', array('age'=>22, 'id'=>1));
        }
    }
    /**
     * 2.读写分离-框架自动
     * @access  public
     * @author  zhaoyingnan 2016-09-18 17:41
     * @param   int         $iType
     * @return  mix
     * @note
     **/
    static function mMasterSlaveTest($iType = 1)
    {
        if($iType == 1)
        {
            # reader
            return DB::connection('laravel_test_ms')->select('select * from student limit 1');
        }
        else
        {
            # writer
            return DB::connection('laravel_test_ms')->update('update student set `age`=:age where id=:id', array('age'=>20, 'id'=>3));
        }
    }
}
?>