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A detailed discussion of PHP distributed deployment

小云云
小云云Original
2018-01-25 14:14:006798browse

In this article, we will share with you PHP distributed deployment, hoping that everyone will have a clearer idea about PHP distributed deployment.

In ordinary Web development, the common mode is that after the user logs in, the login status information is stored in the Session, some of the user's commonly used hot data is stored in the file cache, and the attachment information uploaded by the user is stored in a certain location of the Web server. on a directory. This method is very convenient to use and fully capable for general Web applications. But for high-concurrency enterprise-level websites, it cannot handle it. Web clusters need to be used to achieve load balancing.

After deploying using the Web cluster method, the first thing to adjust is the user status information and attachment information. User status can no longer be saved to the Session, the cache cannot use the file cache of the local Web server, and attachments cannot be saved on the Web server. Because it is necessary to ensure that the status of each web server in the cluster is completely consistent. Therefore, user status, cache, etc. need to be saved to a dedicated cache server, such as Memcache. Attachments need to be saved to cloud storage, such as Qiniu Cloud Storage, Alibaba Cloud Storage, Tencent Cloud Storage, etc.

This article takes the ThinkPHP development framework as an example to explain how to set up and save Session, cache, etc. to the Memcache cache server.

Download the cached Memcache processing class and place it in the Thinkphp\Extend\Driver\Cache directory; download the Session Memcache processing class and place it in the Thinkphp\Extend\Driver\Session directory. As shown in the figure below:




# Modify the configuration file, adjust the Session and cache, All are recorded on the Memcache server. Open ThinkPHP\Conf\convention.PHP and add configuration items:




##[ php]

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  1. ##/* Memcache cache settings */

  2. 'MEMCACHE_HOST'

    => '192.168.202.20',

  3. ##'MEMCACHE_PORT'
  4.                                                                                                                ## Modify the data cache to Memcache:



    [php] view plain copy


    1. ##'DATA_CACHE_TYPE'   => 'Memcache' ,

    ## Modify Session to Memcache:





    ##[php]

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      ##'SESSION_TYPE'
    1.     => 'Memcache' ,

    As shown below:



    Because there are many types of cloud storage, attachments are stored on cloud storage, so I won’t go into details. Just parameterize the SDK provided by each cloud storage. After the above modifications, the Web server can be deployed in a distributed manner.


    ## Attachment 1: CacheMemcache.class.php



    [php]

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    1. // +----------------------------------------------------------------------  

    2. // | ThinkPHP [ WE CAN DO IT JUST THINK IT ]  

    3. // +----------------------------------------------------------------------  

    4. // | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.  

    5. // +----------------------------------------------------------------------  

    6. // | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )  

    7. // +----------------------------------------------------------------------  

    8. // | Author: liu21st   

    9. // +----------------------------------------------------------------------  

    10.   

    11. defined('THINK_PATH') or exit ();

    12. ##/**

    13. ## * Memcache cache driver

    14. * @category Extend

    15. ## * @package Extend

    16. * @subpackage Driver.Cache

    17. ## * @author liu21st
    18. */
    19. ##class
    20. CacheMemcache

      extends Cache {

    21. /**
    22. * Architectural function
    23. ## * @param array $options Cache parameters

    24. * @access public

    25.      */  

    26.     function __construct($options=array()) {  

    27.         if ( !extension_loaded('memcache') ) {  

    28.             throw_exception(L('_NOT_SUPPERT_').':memcache');  

    29.         }  

    30.   

    31.         $options = array_merge(array (  

    32.             'host'        =>  C('MEMCACHE_HOST') ? C('MEMCACHE_HOST') : '127.0.0.1',  

    33.             'port'        =>  C('MEMCACHE_PORT') ? C('MEMCACHE_PORT') : 11211,  

    34.             'timeout'     =>  C('DATA_CACHE_TIMEOUT') ? C('DATA_CACHE_TIMEOUT') : false,  

    35.             'persistent'  =>  false,  

    36.         ),$options);  

    37.   

    38.         $this->options      =   $options;  

    39.         $this->options['expire'] =  isset($options['expire'])?  $options['expire']  :   C('DATA_CACHE_TIME');  

    40.         $this->options['prefix'] =  isset($options['prefix'])?  $options['prefix']  :   C('DATA_CACHE_PREFIX');          

    41.         $this->options['length'] =  isset($options['length'])?  $options['length']  :   0;          

    42.         $func               =   $options['persistent'] ? 'pconnect' : 'connect';  

    43.         $this->handler      =   new Memcache;  

    44.         $options['timeout'] === false ?  

    45.             $this->handler->$func($options['host'], $options['port ']) :

    46. ##                                                                                ##$func($options['host'], $options['port'], $options[' timeout']); ## }

    47. /**

    48. ## * Read cache

    49. ## * @access public

    50. * @param string $name cache variable name

    51. ## * @return mixed

    52. ## */

    53. ##public

      function get( $name) {

      ## N(
    54. 'cache_read'
    55. ,1 ; handler->get($this->options['prefix'

    56. ].
    57. $name ); ## } #                                                                                              

    58. # * @access public

    59. * @param string $name Cache variable name

    60. ## * @param mixed $value Stored data

  5.      * @param integer $expire  有效时间(秒) 

  6.      * @return boolen 

  7.      */  

  8.     public function set($name$value$expire = null) {  

  9.         N('cache_write',1);  

  10.         if(is_null($expire)) {  

  11.             $expire  =  $this->options['expire'];  

  12.         }  

  13.         $name   =   $this->options['prefix'].$name;  

  14.         if($this->handler->set($name$value, 0, $expire)) {  

  15.             if($this->options['length']>0) {  

  16.                 // 记录缓存队列  

  17.                 $this->queue($name);  

  18.             }  

  19.             return true;  

  20.         }  

  21.         return false;  

  22.     }  

  23.   

  24.     /**

  25. ## * Delete cache

  26. * @access public

  27. ## * @param string $name cache variable name

  28. * @return boolen

  29. ##*/

      

  30.     
  31. public

     function rm($name$ttl = false) {  

  32.         
  33. $name

       =   $this->options['prefix'].$name;  

  34.         return $ttl === false ?  

  35.             $this->handler->delete($name) :  

  36.             $this->handler->delete($name$ttl);  

  37.     }  

  38.   

  39.     /**

  40. * clear cache

  41. * @access public

  42. # * @return boolen

  43. */  

  44.     public function clear() {  

  45.         return $this->handler->flush();  

  46.     }  

  47. }  

  附件2:SessionMemcache.class.php




[php] view plain copy


  1. // +----------------------------------------------------------------------  

  2. // |   

  3. // +----------------------------------------------------------------------  

  4. // | Copyright (c) 2013-   

  5. // +----------------------------------------------------------------------  

  6. // | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )  

  7. // +-------------------------------- -------------------------------------

  8. ##// | Author: richievoe

  9. ##// +----------------------------------- ----------------------------------

  10. ##​
  11. /**

  12. ## * Customize Memcache to save session
  13. */
  14. ## Class SessionMemcache{

  15. ##//memcache object

  16. private

  17. $mem; #//SESSION valid time

  18. ##private

  19. $expire

    ; ##//Externally called functions

  20.     public function execute(){  

  21.         session_set_save_handler(  

  22.             array(&$this,'open'),   

  23.             array(&$this,'close'),   

  24.             array(&$this,'read'),   

  25.             array(&$this,'write'),   

  26.              array(&$this,'destroy'),                                                        ,

    'gc'
  27. )

    #                                                              ## } } ##   //Connect memcached and initialize some data

  28. public

  29. function
  30. open($ path,$name

  31. ){
  32. ##            $this ->expire = C('SESSION_EXPIRE') ? C('SESSION_EXPIRE') :ini_get

    (
  33. 'session.gc_maxlifetime'

    );

  34. ##                                                                                                                   #              return $this

    ->mem->connect(C(
  35. 'MEMCACHE_HOST'

    ), C('MEMCACHE_PORT')); }    

    //Close memcache server
  36.  

  37. public function

    close(){
  38. ##                                                                                                                                            }  

  39. ##    

    //Read data   public

  40. function read(

  41. $id
  42. ){

  43.         $id = C('SESSION_PREFIX').$id;  

  44.         $data = $this->mem->get($id);  

  45.         return $data ? $data :'';  

  46.     }  

  47.     //存入数据  

  48.     public function write($id,$data){  

  49.         $id = C('SESSION_PREFIX').$id;  

  50.         //$data = addslashes($data);  

  51.         return $this->mem->set($id,$data,0,$this->expire);  

  52.     }  

  53.     //销毁数据  

  54.     public function destroy($id){  

  55.         $id = C('SESSION_PREFIX').$id;  

  56.              return $this->mem->delete ($id);

  57. ## }

  58. //Garbage destruction

  59. ## public function gc(){

  60. # true; ## }

  61. }

  62. ?>

  63. #Related recommendations:

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