配置范例
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'mysql' => [ 'driver' => 'mysql', 'write' => [ 'host' => '192.168.1.180', ], 'read' => [ ['host' => '192.168.1.182'], ['host' => '192.168.1.179'], ], ... ] |
或
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'mysql' => [ 'driver' => 'mysql', 'write' => [ 'host' => '192.168.1.180', ], 'read' => [ 'host' => ［ '192.168.1.182', '192.168.1.179' ], ], ... ] |
扩展配置范例
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'mysql' => [ 'driver' => 'mysql', 'write' => [ 'host' => '192.168.1.180', 'username' => 'write', 'password' => 'write', ], 'read' => [ [ 'host' => '192.168.1.182', 'username' => 'read1', 'password' => 'read1', ], [ 'host' => '192.168.1.179', 'username' => 'read2', 'password' => 'read2', ], ], ... ] |
或者
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'mysql' => [ 'driver' => 'mysql', 'write' => [ 'host' => '192.168.1.180', 'username' => 'write', 'password' => 'write', ], 'read' => [ 'host' => ［ '192.168.1.179', '192.168.1.182', ], 'username' => 'read', 'password' => 'read', ], ... ] |
公司数据库架构为一主多从，从库访问地址为唯一地址，该处方便负载均衡及扩展从库。所以最终线上采用的配置
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'mysql' => [ 'driver' => 'mysql', 'write' => [ 'host' => '192.168.1.180', 'username' => 'write', 'password' => 'write', ], 'read' => [ 'host' => '192.168.1.179' 'username' => 'read', 'password' => 'read', ], ... ] |
代码分析
授人以鱼不如授人以渔，之所以配置如此灵活的原因，以及如何查找到这些配置方式。主要通过查找代码，分析代码；相关代码都在下面粘出，这里就不做解释了，代码能说明一切；
路径：vendor/laravel/framework/src/Illuminate/Database/Connectors/ConnectionFactory.php
代码：
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class ConnectionFactory{ ... /** * Get the read configuration for a read / write connection. * * @param array $config * @return array */ protected function getReadConfig(array $config) { $readConfig = $this->getReadWriteConfig($config, 'read'); if (isset($readConfig['host']) && is_array($readConfig['host'])) { $readConfig['host'] = count($readConfig['host']) > 1 ? $readConfig['host'][array_rand($readConfig['host'])] : $readConfig['host'][0]; } 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 $merge) { return Arr::except(array_merge($config, $merge), ['read', 'write']); } ...} class Arr{ ... /** * Get all of the given array except for a specified array of items. * * @param array $array * @param array|string $keys * @return array */ public static function except($array, $keys) { static::forget($array, $keys); return $array; } ... /** * Remove one or many array items from a given array using "dot" notation. * * @param array $array * @param array|string $keys * @return void */ public static function forget(&$array, $keys) { $original = &$array; $keys = (array) $keys; if (count($keys) === 0) { return; } foreach ($keys as $key) { $parts = explode('.', $key); while (count($parts) > 1) { $part = array_shift($parts); if (isset($array[$part]) && is_array($array[$part])) { $array = &$array[$part]; } else { $parts = []; } } unset($array[array_shift($parts)]); // clean up after each pass $array = &$original; } } ...} |
以上这篇Laravel数据库读写分离配置的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：http://blog.onlywan.cc/14847498744910.html
