Php Laravel multiple memcached:故障转移不起作用

我有两个memcached服务器。我设置了以下配置，我的期望是，即使两台服务器中的一台停机，我的PHP应用程序也可以使用AliveMemcached。但它没有起作用。执行Memcached的get（）方法时出现“未添加Memcached服务器”错误

我正在使用最新版本的memcached服务器和客户端

memcached 1.4.25-2ubuntu1
php-memcached version 3.0.0b1
libmemcached version 1.0.18

你有什么想法吗

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编辑1

“未添加Memcached服务器”错误来自此处

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编辑2

我发现Memcached:：XXX选项是整数值。因此，选项值不会传递给服务器。我解决了这个问题，但结果没有改变

'options' => array('10', '1', '2', true, '1')

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编辑3

这里记录了Laravel的缓存示例设置

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编辑4

我尝试在没有Laravel的情况下使用PHP，然后我发现当两台服务器中的一台死机时，getVersion（）返回null

<?php

$m = new Memcached();

$m->addServer('127.0.0.1', 11211);
$m->addServer('127.0.0.1', 11212);

$status = $m->getVersion();

if ($status == null){
  echo "null";
} else {
  echo "not null";
}

* when both the two servers are alive

// not null
// $status = array('127.0.0.1:11211' => '1.4.25', '127.0.0.1:11212' => '1.4.14')

* when one of the two server is dead

// null
// $status = null

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我为此苦苦挣扎了几天，终于找到了解决办法

安装起来很容易：

composer需要fingo/laravel缓存回退

将提供程序
Fingo\LaravelCacheFallback\CacheFallbackServiceProvider:：class
添加到'config/app.php'中`

默认回退顺序为：redis、memcached、数据库、cookie、文件、数组。如果需要更改回退顺序，请发布供应商：
php artisan供应商：publish--provider=“Fingo\LaravelCacheFallback\CacheFallbackService provider”

我正在将Laravel 5.2与PhP7一起使用，对库的要求是：
php:~5.6 | ~7.0，illumb/cache:~5.1

LE：我已经实现了一种不同的方法来从一个Memcached服务器故障切换到另一个Memcached服务器，如果它们都关闭了，那么它将故障切换到“文件”驱动程序

config/cache.php：

'memcached' => [
        'driver'  => 'memcached',
        // To use the options we need to install the PHP driver: sudo yum install php-memcached
        'options' => [
            Memcached::OPT_CONNECT_TIMEOUT => 3,
            Memcached::OPT_DISTRIBUTION => Memcached::DISTRIBUTION_CONSISTENT,
            Memcached::OPT_SERVER_FAILURE_LIMIT => 2,
            Memcached::OPT_REMOVE_FAILED_SERVERS  => true,
            Memcached::OPT_RETRY_TIMEOUT => 1,
        ],
        'servers' => [
            [
                'host' => 'xxx.xxx.xxx.xxx',
                'port' => 11211,
                'weight' => 90,
            ],
        ]
    ],

    'memcached249' => [
        'driver'  => 'memcached',
        // To use the options we need to install the PHP driver: sudo yum install php-memcached
        'options' => [
            Memcached::OPT_CONNECT_TIMEOUT => 3,
            Memcached::OPT_DISTRIBUTION => Memcached::DISTRIBUTION_CONSISTENT,
            Memcached::OPT_SERVER_FAILURE_LIMIT => 2,
            Memcached::OPT_REMOVE_FAILED_SERVERS  => true,
            Memcached::OPT_RETRY_TIMEOUT => 1,
        ],
        'servers' => [
            [
                'host' => 'xxx.xxx.xxx.xxx',
                'port' => 11211,
                'weight' => 100,
            ],
        ]
    ],

config/cache_fallback.php


唯一的问题是，如果第一个memcached服务器停机，它会降低整个系统的速度（但至少不会破坏主服务器）。希望这有帮助：）

'memcached' => [
        'driver'  => 'memcached',
        // To use the options we need to install the PHP driver: sudo yum install php-memcached
        'options' => [
            Memcached::OPT_CONNECT_TIMEOUT => 3,
            Memcached::OPT_DISTRIBUTION => Memcached::DISTRIBUTION_CONSISTENT,
            Memcached::OPT_SERVER_FAILURE_LIMIT => 2,
            Memcached::OPT_REMOVE_FAILED_SERVERS  => true,
            Memcached::OPT_RETRY_TIMEOUT => 1,
        ],
        'servers' => [
            [
                'host' => 'xxx.xxx.xxx.xxx',
                'port' => 11211,
                'weight' => 90,
            ],
        ]
    ],

    'memcached249' => [
        'driver'  => 'memcached',
        // To use the options we need to install the PHP driver: sudo yum install php-memcached
        'options' => [
            Memcached::OPT_CONNECT_TIMEOUT => 3,
            Memcached::OPT_DISTRIBUTION => Memcached::DISTRIBUTION_CONSISTENT,
            Memcached::OPT_SERVER_FAILURE_LIMIT => 2,
            Memcached::OPT_REMOVE_FAILED_SERVERS  => true,
            Memcached::OPT_RETRY_TIMEOUT => 1,
        ],
        'servers' => [
            [
                'host' => 'xxx.xxx.xxx.xxx',
                'port' => 11211,
                'weight' => 100,
            ],
        ]
    ],

return [
    'fallback_order' => [
        'memcached',
        'memcached249',
        'file',
    ]
];