images-using-images-s2i-perl-configuration.adoc

Configuring source-to-image for Perl

The Perl image supports a number of environment variables which can be set to control the configuration and behavior of the Perl runtime.

To set these environment variables as part of your image, you can place them into a .s2i/environment file inside your source code repository, or define them in the environment section of the build configuration’s sourceStrategy definition.

You can also set environment variables to be used with an existing image when creating new applications, or by updating environment variables for existing objects such as deployment configurations.

Note	Environment variables that control build behavior must be set as part of the source-to-image (S2I) build configuration or in the .s2i/environment file to make them available to the build steps.

Table 1. Perl Environment Variables

Variable name	Description
ENABLE_CPAN_TEST	When set to true, this variable installs all the cpan modules and runs their tests. By default, the testing of the modules is disabled.
CPAN_MIRROR	This variable specifies a mirror URL which cpanminus uses to install dependencies. By default, this URL is not specified.
PERL_APACHE2_RELOAD	Set this to true to enable automatic reloading of modified Perl modules. By default, automatic reloading is disabled.
HTTPD_START_SERVERS	The StartServers directive sets the number of child server processes created on startup. Default is 8.
HTTPD_MAX_REQUEST_WORKERS	Number of simultaneous requests that will be handled by Apache. The default is 256, but it will be automatically lowered if memory is limited.