CODEWITHSUNDEEP
websocketmod-proxyapache2.4
Does
Does

Reputation: 589

Cannot load modules/mod_proxy_wstunnel.so into server

Recently I need integrate a websocket server with apache2，and I find that apache2.4 has supported websocket with the module : mod_proxy_wstunnel. http://httpd.apache.org/docs/2.4/mod/mod_proxy_wstunnel.html

I compiled them by myself, but encountered a problem :

httpd: Syntax error on line 122 of /usr/local/apache2/conf/httpd.conf: Cannot load modules/mod_proxy_wstunnel.so into server: /usr/local/apache2/modules/mod_proxy_wstunnel.so: undefined symbol: ap_proxy_release_connection

My steps are:

  1. Download source code.
    • php7 github.com/php/php-src/releases/tag/php-7.0.10
    • apache2.4 github.com/apache/httpd/releases/tag/2.4.23
  2. Copy to my workspace and tar，say /home
    • shell> tar -xjf php-7.0.10.tar.bz2
    • shell> tar -xjf httpd-2.4.23.tar.bz2
  3. Install gcc : yum install gcc
  4. Compile apache
    • down apr：apr-1.5.2.tar.gz apr-util-1.5.4.tar.gz
    • copy to /httpd-2.4.23/srclib
      tar -zvf apr-1.5.2.tar.gz tar -zvf apr-util-1.5.4.tar.gz
    • Modify the files name:
      apr-1.5.2 as apr
      apr-util-1.5.4 as apr-util
    • Install pcre
      yum install pcre-devel
    • ./configure --enable-so --enable-http --enable-proxy --enable-proxy-http --with-included-apr --enable-proxy-wstunnel
    • make && make install
    • set apache server ip：
      shell> vi /usr/local/apache2/conf/httpd.conf ServerName 127.0.0.1
  5. Compile php
    • libxml2:
      yum install libxml2-devel
    • mkdir /usr/local/php7
    • ./configure --prefix=/usr/local/php7 --with-mysqli --enable-mysqlnd --with-mysql-sock=/var/lib/mysql/mysql.sock --with-apxs2=/usr/local/apache2/bin/apxs
    • make && make install
    • cp -v ./php.ini-production /usr/local/php7/lib/php.ini
    • configure httpd.conf
      shell> vi /usr/local/apache2/conf/httpd.conf
      <FilesMatch \.php$> SetHandler application/x-httpd-php </FilesMatch>
  6. enalbe mod_proxy_wstunnel shell> vi /usr/local/apache2/conf/httpd.conf
    LoadModule proxy_wstunnel_module modules/mod_proxy_wstunnel.so

Above is my steps. Then I try to start my apache2 :

/usr/local/apache2/bin/apachectl start

Got the following errors:

httpd: Syntax error on line 122 of /usr/local/apache2/conf/httpd.conf: Cannot load modules/mod_proxy_wstunnel.so into server: /usr/local/apache2/modules/mod_proxy_wstunnel.so: undefined symbol: ap_proxy_release_connection

I have google it , but can't find some helpful info.

Upvotes: 4

Views: 6852

Answers (1)

Unbeliever
Unbeliever

Reputation: 336

You need to load mod_proxy as well as mod_proxy_wstunnel. If you load an underlying proxy module (http/fcgi/ajp/wstunnel) without mod_proxy you will get this error.

So check your configuration and make sure you have a LoadModule directive for mod_proxy as well as mod_proxy_wstunnel.

You can also use the output of apachectl -M to check the modules Apache is loading.

Upvotes: 5

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