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Home Backend Development PHP Tutorial 如何使两台ECS通过memcache共享session

如何使两台ECS通过memcache共享session

Jun 06, 2016 pm 08:14 PM
linux memcached php

大家好,我现在有两台阿里云ECS,都在北京区,还有一个阿里云的云数据库Memcache版。
我现在想实现共享同一域名下的session,这样我通过负载均衡随机分配到这两台服务器上,只要登录其中一台服务器即可共享登录。

然后,我是通过修改php.ini来实现把session存储到memcache上的,这些都ok了,但是现在发现一个问题是两台服务器的session并不是同步的,这是为什么呢?

服务器A:info.php

<?php
    session_start();
    $sn = session_id();
    echo $sn."\n";
    echo '<pre class="brush:php;toolbar:false">';
    var_dump($_SESSION);
    echo '
Copy after login
Copy after login
'; echo "\n The A"

服务器B:info.php

<?php
    session_start();
    $sn = session_id();
    echo $sn."\n";
    echo '<pre class="brush:php;toolbar:false">';
    $_SESSION['1'] = 'abc';
    var_dump($_SESSION);
    echo '
Copy after login
Copy after login
'; echo "\n The B" ?>

打印结果是:服务器A

<code>jck9tkdggk9drukfnu571hbjj5
array(0) {
}
 The A</code>
Copy after login
Copy after login

服务器B

<code>jck9tkdggk9drukfnu571hbjj5
array(1) {
  [1]=>
  string(3) "abc"
}
 The B</code>
Copy after login
Copy after login

这是为什么呢?通过memcache的命令行得知,php已经将session存入memcache了。

求解答,谢谢。

回复内容:

大家好,我现在有两台阿里云ECS,都在北京区,还有一个阿里云的云数据库Memcache版。
我现在想实现共享同一域名下的session,这样我通过负载均衡随机分配到这两台服务器上,只要登录其中一台服务器即可共享登录。

然后,我是通过修改php.ini来实现把session存储到memcache上的,这些都ok了,但是现在发现一个问题是两台服务器的session并不是同步的,这是为什么呢?

服务器A:info.php

<?php
    session_start();
    $sn = session_id();
    echo $sn."\n";
    echo '<pre class="brush:php;toolbar:false">';
    var_dump($_SESSION);
    echo '
Copy after login
Copy after login
'; echo "\n The A"

服务器B:info.php

<?php
    session_start();
    $sn = session_id();
    echo $sn."\n";
    echo '<pre class="brush:php;toolbar:false">';
    $_SESSION['1'] = 'abc';
    var_dump($_SESSION);
    echo '
Copy after login
Copy after login
'; echo "\n The B" ?>

打印结果是:服务器A

<code>jck9tkdggk9drukfnu571hbjj5
array(0) {
}
 The A</code>
Copy after login
Copy after login

服务器B

<code>jck9tkdggk9drukfnu571hbjj5
array(1) {
  [1]=>
  string(3) "abc"
}
 The B</code>
Copy after login
Copy after login

这是为什么呢?通过memcache的命令行得知,php已经将session存入memcache了。

求解答,谢谢。

session 跟 cookie 的关系要理清楚
前提是基于同一个域,获取相同的cookie,继而获取相同的sessionid,获取相同的session内容,共享session

你的例子中,打印的服务器A的结果中的id ,跟服务器B的结果中的id, jck9tkdggk9drukfnu571hbjj5,是相同的? 还是你修饰过例子 ?

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