本篇文章给大家带来的内容是关于laravel学习：主从读写分离配置的实现，有一定的参考价值，有需要的朋友可以参考一下，希望对你有所帮助。
在db的连接工厂中找到以下代码
.../vendor/laravel/framework/src/illuminate/database/connectors/connectionfactory.php
/**
* Get the read configuration for a read / write connection.
*
* @param array $config
* @return array
*/
protected function getReadConfig(array $config)
{
$readConfig = $this->getReadWriteConfig($config, 'read');
return $this->mergeReadWriteConfig($config, $readConfig);
}
/**
* Get a read / write level configuration.
*
* @param array $config
* @param string $type
* @return array
*/
protected function getReadWriteConfig(array $config, $type)
{
if (isset($config[$type][0])) {
return $config[$type][array_rand($config[$type])];
}
return $config[$type];
}
/**
* Merge a configuration for a read / write connection.
*
* @param array $config
* @param array $merge
* @return array
*/
protected function mergeReadWriteConfig(array $config, array $merge)
{
return array_except(array_merge($config, $merge), ['read', 'write']);
}工厂类通过随机获取读DB配置来进行读取操作，由此可推出DB的配置应该如下
'mysql' => [
'write' => [
'host' => '192.168.1.180',
],
'read' => [
['host' => '192.168.1.182'],
['host' => '192.168.1.179'],
],
'driver' => 'mysql',
'database' => 'database',
'username' => 'root',
'password' => '',
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
]加强版，支持多主多从，支持独立用户名和密码，配置如下
'mysql' => [
'write' => [
[
'host' => '192.168.1.180',
'username' => '',
'password' => '',
],
],
'read' => [
[
'host' => '192.168.1.182',
'username' => '',
'password' => '',
],
[
'host' => '192.168.1.179',
'username' => '',
'password' => '',
],
],
'driver' => 'mysql',
'database' => 'database',
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
]验证
开启MySQL的general-log，通过tail -f的方式监控log变化来确定配置是否生效
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