Configuring Apache HTTP Server V2.0

This topic describes how to change configuration settings for Apache HTTP Server Version 2.0.

Before you begin

Apache HTTP Server v2.0 is different from IBM® HTTP Server (powered by Apache). Apache HTTP Server is not supported on IBM i. For details on configuring IBM HTTP Server (Powered by Apache), see Configuring IBM HTTP Server powered by Apache 2.x.

When you install the Web server plug-ins for WebSphere® Application Server on a non-IBM i system, the Plug-ins installation wizard configures the Web server.

This topic describes how to configure the Apache HTTP Server Version 2.0 Web server. Other procedures in Editing Web server configuration files describe configuring other supported Web servers.

Avoid trouble:
  • If you are using an Apache HTTP Server that supports 64-bit addressing, you must use the 64-bit CD provided with the WebSphere Application Server product to install the Apache Web server plug-in binaries. If you use the 32-bit CD, you will receive an error message indicating that the plug-in binaries did not load.
  • If you are using an Apache HTTP Server that supports 32-bit addressing, you must use the 32-bit CD provided with the WebSphere Application Server product to install the Apache Web server plug-in binaries. If you use the 64-bit CD, you will receive an error message indicating that the plug-in binaries did not load.
A sample error message follows:
httpd: Syntax error on line XXX of /home/apache/conf/httpd.conf: Cannot 
load /home/apache/Plugins/mod_was_ap20_http.sl into server: Invalid argument
gotcha

The plug-in was tested with the threaded worker multi-processing module (MPM) on all platforms except Windows®. The plug-in was tested with the default threaded MPM on Windows.

The plug-in works with the Apache 2 prefork MPM but works best with the worker MPM. The plug-in maintains connection pools to backend WebSphere Application Servers and uses in-memory caching. These plug-in functions perform most efficiently when Apache 2.0 is configured to use a single child process with the ThreadsPerChild value equal to the MaxClients value. The plug-in can be used with the prefork MPM or the worker MPM that is configured with multiple child processes, but at reduced efficiency.

Compatibility Statement The plug-in works with versions of the Apache HTTP Server that claim full binary compatibility with Apache 2.0.47 and later, which are built with compilers and compiler options that are compatible with those used to build the plug-in.

About this task

Perform the step that configures Apache 2.0 for your operating system.

Examples and messages are shown on more than one line for clarity. Place each directive in a Web server configuration file on one line.

Local file path means a file path to the plugin-cfg.xml file on an Application Server that is on the same machine as the Web server. Remote file path means the file path to the plugin-cfg.xml file when the Application Server is on a remote machine.

The Plug-ins installation wizard installs a dummy plugin-cfg.xml file during installation, but this file requires periodic propagation from the real file on the Application Server machine.

The node_name in the following Application Server local file paths is web_server_name_node for a stand-alone Application Server

The name of the Web server definition in the following steps is webserver1.

Procedure

Results

This procedure results in reconfiguring the Apache 2.0 Web server.

What to do next

The mod_was_ap20_http plug-in module requires the GSKIT Secure Sockets Layer (SSL) encryption library if the plug-in is configured to support encrypted connections to back-end WebSphere Application Servers.

The Plug-ins installation wizard installs the GSKIT SSL encryption library at the required level if it is not installed. If you manually copy the plug-in to a new machine, you might not have the required GSKIT libraries for encrypting back-end connections.

After configuring a Web server, you can install applications on it. See the Applications section of the information center for more information.




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Last updated: Oct 20, 2010 9:57:58 PM CDT
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