如何使两台ECS通过memcache共享session
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 '
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 '
打印结果是:服务器A
<code>jck9tkdggk9drukfnu571hbjj5 array(0) { } The A</code>
服务器B
<code>jck9tkdggk9drukfnu571hbjj5 array(1) { [1]=> string(3) "abc" } The B</code>
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 '
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 '
打印结果是:服务器A
<code>jck9tkdggk9drukfnu571hbjj5 array(0) { } The A</code>
服务器B
<code>jck9tkdggk9drukfnu571hbjj5 array(1) { [1]=> string(3) "abc" } The B</code>
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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