Perl 5.24 Docker image

This container image includes Perl 5.24 as a S2I base image for your Perl 5.24 applications. Users can choose between RHEL and CentOS based builder images. The RHEL image is available in the Red Hat Container Catalog as registry.access.redhat.com/rhscl/perl-524-rhel7. The CentOS image is then available on Docker Hub as centos/perl-524-centos7. The resulting image can be run using Docker.

Description

Perl 5.24 available as docker container is a base platform for building and running various Perl 5.24 applications and frameworks. Perl is a high-level programming language with roots in C, sed, awk and shell scripting. Perl is good at handling processes and files, and is especially good at handling text. Perl’s hallmarks are practicality and efficiency. While it is used to do a lot of different things, Perl’s most common applications are system administration utilities and web programming.

Usage

To build a simple perl-sample-app application, using standalone S2I and then run the resulting image with Docker execute:

• For RHEL based image

   $ s2i build https://github.com/sclorg/s2i-perl-container.git --context-dir=5.24/test/sample-test-app/ rhscl/perl-524-rhel7 perl-sample-app
   $ docker run -p 8080:8080 perl-sample-app
  

• For CentOS based image

   $ s2i build https://github.com/sclorg/s2i-perl-container.git --context-dir=5.24/test/sample-test-app/ centos/perl-524-centos7 perl-sample-app
   $ docker run -p 8080:8080 perl-sample-app
  

Accessing the application:

$ curl 127.0.0.1:8080

Environment variables

To set environment variables, you can place them as a key value pair into a .s2i/environment file inside your source code repository.

• ENABLE_CPAN_TEST

  Allow the installation of all specified cpan packages and the running of their tests. The default value is false.

• CPAN_MIRROR

  This variable specifies a mirror URL which will used by cpanminus to install dependencies. By default the URL is not specified.

• PERL_APACHE2_RELOAD

  Set this to “true” to enable automatic reloading of modified Perl modules.

• 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.

• PSGI_FILE

  Override PSGI application detection.

  If the PSGI_FILE variable is set to empty value, no PSGI application will be detected and mod_perl not be reconfigured.

  If the PSGI_FILE variable is set and non-empty, it will define path to the PSGI application file. No detection will be used.

  If the PSGI_FILE variable does not exist, autodetection will be used: If exactly one ./*.psgi file exists, mod_perl will be configured to execute that file.

• PSGI_URI_PATH

  This variable overrides location URI path that is handled path the PSGI application. Default value is “/”.

See also

Dockerfile and other sources are available on https://github.com/sclorg/s2i-perl-container. In that repository you also can find another versions of Perl environment Dockerfiles. Dockerfile for CentOS is called Dockerfile, Dockerfile for RHEL is called Dockerfile.rhel7.