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catalyst::manual::deployment(3pm) [debian man page]

Catalyst::Manual::Deployment(3pm)			User Contributed Perl Documentation			 Catalyst::Manual::Deployment(3pm)

Catalyst::Manual::Deployment - Deploying Catalyst DEPLOYMENT OPTIONS
Catalyst applications are most often deployed as a FastCGI or mod_perl application (with FastCGI being the recommended option). However, as Catalyst is based on the PSGI specification, any web handler implementing that specification can be used to run Catalyst applications. This documentation most thoroughly covers the normal and traditional deployment options, but will mention alternate methods of deployment, and we welcome additional documentation from people deploying Catalyst in non-standard environments. Deployment in a shared hosting environment Almost all shared hosting environments involve deploying Catalyst as a FastCGI application on Apache. You will usually want to have a set of libraries specific to your application installed on your shared host. Full details of deploying Catalyst in a shared hosting environment are at Catalyst::Manual::Deployment::SharedHosting. FastCGI FastCGI is the most common Catalyst deployment option. It is documented generally in Catalyst::Manual::Deployment::FastCGI, and there are specific instructions for using FastCGI with common web servers below: Apache Catalyst::Manual::Deployment::Apache::FastCGI nginx Catalyst::Manual::Deployment::nginx::FastCGI lighttpd Catalyst::Manual::Deployment::lighttpd::FastCGI Microsoft IIS Catalyst::Manual::Deployment::IIS::FastCGI mod_perl Traditionally a common deployment option for dedicated applications, mod_perl has some advantages and disadvantages over FastCGI. Use of mod_perl is documented in Catalyst::Manual::Deployment::Apache::mod_perl. Development Server It is possible to deploy the Catalyst development server behind a reverse proxy. This may work well for small-scale applications which are in an early development phase, but which you want to be able to show to people. See Catalyst::Manual::Deployment::DevelopmentServer. PSGI Catalyst can be deployed with any PSGI-compliant handler. See Catalyst::PSGI for more information; a list of possible deployment servers are shown below: Starman Starman is a high-performance Perl server implementation, which is designed to be used directly (rather than behind a reverse proxy). It includes HTTP/1.1 support, chunked requests and responses, keep-alive, and pipeline requests. Starlet Starlet is a standalone HTTP/1.0 server with keepaXXalive support which is suitable for running HTTP application servers behind a reverse proxy. Twiggy Twiggy is a high-performance asynchronous web server. It can be used in conjunction with Catalyst, but there are a number of caveats which mean that it is not suitable for most deployments. Chef <LChef|> is an open-source systems integration framework built specifically for automating cloud computing deployments. A Cookbooks demonstrating how to deploy a Catalyst application using Chef is available at <> and <>. AUTHORS
Catalyst Contributors, see COPYRIGHT
This library is free software. You can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2012-01-20 Catalyst::Manual::Deployment(3pm)

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Catalyst::Manual::Deployment::Apache::mod_perl(3pm)	User Contributed Perl Documentation    Catalyst::Manual::Deployment::Apache::mod_perl(3pm)

Catalyst::Manual::Deployment::Apache::mod_perl - Deploying Catalyst with mod_perl mod_perl Deployment The recommended method of deploying Catalyst applications is FastCGI. In many cases, mod_perl is not the best solution, but we'll list some pros and cons so you can decide for yourself. Pros Speed mod_perl is fast, and your entire app will be loaded in memory within each Apache process. Shared memory for multiple apps If you need to run several Catalyst apps on the same server, mod_perl will share the memory for common modules. Cons Memory usage Since your application is fully loaded in memory, every Apache process will be rather large. This means a large Apache process will be tied up while serving static files, large files, or dealing with slow clients. For this reason, it is best to run a two-tiered web architecture with a lightweight frontend server passing dynamic requests to a large backend mod_perl server. Reloading Any changes made to the code of your app require a full restart of Apache. Catalyst does not support Apache::Reload or StatINC. This is another good reason to run a frontend web server where you can set up an "ErrorDocument 502" page to report that your app is down for maintenance. Cannot run multiple versions of the same app It is not possible to run two different versions of the same application in the same Apache instance because the namespaces will collide. Cannot run different versions of libraries If you have two different applications which run on the same machine, and each application needs a different versions of a library, the only way to do this is to have per-vhost perl interpreters (with different library paths). This is entirely possible, but nullifies all the memory sharing benefits that you get from having multiple applications sharing the same interpreter. Setup Now that we have that out of the way, let's talk about setting up mod_perl to run a Catalyst app. 2. Install Apache with mod_perl Both Apache 1.3 and Apache 2 are supported, although Apache 2 is highly recommended. With Apache 2, make sure you are using the prefork MPM and not the worker MPM. The reason for this is that many Perl modules are not thread-safe and may have problems running within the threaded worker environment. Catalyst is thread-safe however, so if you know what you're doing, you may be able to run using worker. In Debian, the following commands should get you going. apt-get install apache2-mpm-prefork apt-get install libapache2-mod-perl2 3. Configure your application Every Catalyst application will automagically become a mod_perl handler when run within mod_perl. This makes the configuration extremely easy. Here is a basic Apache 2 configuration. PerlSwitches -I/var/www/MyApp/lib PerlModule MyApp <Location /> SetHandler modperl PerlResponseHandler MyApp </Location> The most important line here is "PerlModule MyApp". This causes mod_perl to preload your entire application into shared memory, including all of your controller, model, and view classes and configuration. If you have -Debug mode enabled, you will see the startup output scroll by when you first start Apache. Also, there have been reports that the block above should instead be (but this has not been confirmed): <Perl> use lib '/var/www/MyApp/lib'; use MyApp; </Perl> <Location /> SetHandler modperl PerlResponseHandler MyApp </Location> For an example Apache 1.3 configuration, please see the documentation for Catalyst::Engine::Apache::MP13. Test It That's it, your app is now a full-fledged mod_perl application! Try it out by going to Other Options Non-root location You may not always want to run your app at the root of your server or virtual host. In this case, it's a simple change to run at any non- root location of your choice. <Location /myapp> SetHandler modperl PerlResponseHandler MyApp </Location> When running this way, it is best to make use of the "uri_for" method in Catalyst for constructing correct links. Static file handling Static files can be served directly by Apache for a performance boost. DocumentRoot /var/www/MyApp/root <Location /static> SetHandler default-handler </Location> This will let all files within root/static be handled directly by Apache. In a two-tiered setup, the frontend server should handle static files. The configuration to do this on the frontend will vary. Note the path of the application needs to be stated explicitly in the web server configuration for this recipes. AUTHORS
Catalyst Contributors, see COPYRIGHT
This library is free software. You can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2012-01-20 Catalyst::Manual::Deployment::Apache::mod_perl(3pm)
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