Chapter 4. Specifics of Individual Software Collections

Red Hat Developer Toolset is designed for developers working on the Red Hat Enterprise Linux platform. Red Hat Developer Toolset provides current versions of the GNU Compiler Collection, GNU Debugger, and other development, debugging, and performance monitoring tools. Similarly to other Software Collections, an additional set of tools is installed into the /opt/ directory. These tools are enabled by the user on demand using the supplied scl utility. Similarly to other Software Collections, these do not replace the Red Hat Enterprise Linux system versions of these tools, nor will they be used in preference to those system versions unless explicitly invoked using the scl utility.

For an overview of features, refer to the Main Features section of the Red Hat Developer Toolset Release Notes.

For a complete list of components, see the Red Hat Developer Toolset Components table in the Red Hat Developer Toolset User Guide.

Note that since Red Hat Developer Toolset 3.1, Red Hat Developer Toolset requires the rh-java-common Software Collection.

The rh-eclipse46 Software Collection, available for Red Hat Enterprise Linux 7, includes Eclipse 4.6.1, which is based on the Eclipse Foundation's Neon release train. This integrated development environment was previously available as a part of Red Hat Developer Toolset. Note that the rh-eclipse46 Software Collection requires the rh-java-common Collection.

Eclipse is a powerful development environment that provides tools for each phase of the development process. It integrates a variety of disparate tools into a unified environment to create a rich development experience, provides a fully configurable user interface, and features a pluggable architecture that allows for an extension in a variety of ways. For instance, the Valgrind plug-in allows programmers to perform memory profiling, otherwise performed on the command line, through the Eclipse user interface.

Eclipse provides a graphical development environment alternative to traditional interaction with command line tools and as such, it is a welcome alternative to developers who do not want to use the command line interface. The traditional, mostly command line-based Linux tools suite (such as gcc or gdb) and Eclipse offer two distinct approaches to programming.

Note that if you intend to develop applications for Red Hat JBoss Middleware or require support for OpenShift Tools, it is recommended that you use Red Hat JBoss Developer Studio.

yum install rh-eclipse46

scl enable rh-eclipse46 eclipse

The rh-thermostat16 Software Collection provides a monitoring and instrumentation tool for the OpenJDK HotSpot JVM, with support for monitoring multiple JVM instances. The system is made up of two components: an Agent, which collects data, and a Client, which allows users to visualize collected data. These components communicate via a storage layer: either directly via MongoDB or indirectly via a Web layer for increased security. A pluggable agent and GUI framework allows for collection and visualization of performance data beyond what is included out of the box.

To install the rh-thermostat16 collection, type the following command as root:

yum install rh-thermostat16

Note that the rh-thermostat16 Software Collection requires the rh-java-common Collection.

To enable the rh-thermostat16 collection, type the following command at a shell prompt:

scl enable rh-thermostat16 bash

For more information, refer to the Thermostat User Guide. In order to deploy Thermostat securely, see the Configuration and Administration Guide.

Red Hat Software Collections 2.3 adds the rh-ruby23 Software Collection together with the rh-ror42 Collection.

To install Ruby on Rails 4.2, type the following command as root:

yum install rh-ror42

Installing any package from the rh-ror42 Software Collection automatically pulls in rh-ruby23 and rh-nodejs4 as dependencies.

The rh-nodejs4 Collection is used by certain gems in an asset pipeline to post-process web resources, for example, sass or coffee-script source files. To run the rails s command without requiring rh-nodejs4, disable the coffee-rails and uglifier gems in the Gemfile.

The Ruby on Rails Collection can be enabled by the following command, which will automatically enable rh-ruby23:

scl enable rh-ror42 bash

The rh-ruby23 and rh-ror42 Software Collections are supported together.

To install the rh-mongodb32 collection, type the following command as root:

yum install rh-mongodb32

Note that the rh-mongodb32 Software Collection requires the rh-java-common Collection.

To run the MongoDB shell utility, type the following command:

scl enable rh-mongodb32 'mongo'

If you are using Red Hat Enterprise Linux 6, the following instructions apply to your system.

To start the MongoDB daemon, type the following command as root:

service rh-mongodb32-mongod start

To start the MongoDB daemon on boot, type this command as root:

chkconfig rh-mongodb32-mongod on

To start the MongoDB sharding server, type this command as root:

service rh-mongodb32-mongos start

To start the MongoDB sharding server on boot, type the following command as root:

chkconfig rh-mongodb32-mongos on

Note that the MongoDB sharding server does not work unless the user starts at least one configuration server and specifies it in the mongos.conf file.

When using Red Hat Enterprise Linux 7, the following commands are applicable.

To start the MongoDB daemon, type the following command as root:

systemctl start rh-mongodb32-mongod.service

To start the MongoDB daemon on boot, type this command as root:

systemctl enable rh-mongodb32-mongod.service

To start the MongoDB sharding server, type the following command as root:

systemctl start rh-mongodb32-mongos.service

To start the MongoDB sharding server on boot, type this command as root:

systemctl enable rh-mongodb32-mongos.service

Note that the MongoDB sharding server does not work unless the user starts at least one configuration server and specifies it in the mongos.conf file.

Git is a distributed revision control system with a decentralized architecture. As opposed to centralized version control systems with a client-server model, Git ensures that each working copy of a Git repository is an exact copy with complete revision history. This not only allows you to work on and contribute to projects without the need to have permission to push your changes to their official repositories, but also makes it possible for you to work with no network connection. For detailed information, see the Git chapter in the Red Hat Enterprise Linux 7 Developer Guide.

The rh-maven33 Software Collection provides a software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project's build, reporting, and documentation from a central piece of information.

To install the rh-maven33 Collection, type the following command as root:

yum install rh-maven33

To enable this collection, type the following command at a shell prompt:

scl enable rh-maven33 bash

Global Maven settings, such as remote repositories or mirrors, can be customized by editing the /opt/rh/rh-maven33/root/etc/maven/settings.xml file.

For more information about using Maven, refer to the Maven documentation. Usage of plug-ins is described in this section; to find documentation regarding individual plug-ins, see the index of plug-ins.

The rh-passenger40 Software Collection provides Phusion Passenger, a web and application server designed to be fast, robust and lightweight.

The rh-passenger40 Collection supports multiple versions of Ruby, particularly the ruby193, ruby200, and rh-ruby22 Software Collections together with Ruby on Rails using the ror40 or rh-ror41 Collections. Prior to using Passenger with any of the Ruby Software Collections, install the corresponding package from the rh-passenger40 Collection: the rh-passenger-ruby193, rh-passenger-ruby200, or rh-passenger-ruby22 package.

The rh-passenger40 Software Collection can also be used with Apache httpd from the httpd24 Software Collection. To do so, install the rh-passenger40-mod_passenger package. Refer to the default configuration file /opt/rh/httpd24/root/etc/httpd/conf.d/passenger.conf for an example of Apache httpd configuration, which shows how to use multiple Ruby versions in a single Apache httpd instance.

Additionally, the rh-passenger40 Software Collection can be used with the nginx 1.6 web server from the nginx16 Software Collection. To use nginx 1.6 with rh-passenger40, you can run Passenger in Standalone mode using the following command in the web appplication's directory:

scl enable nginx16 rh-passenger40 'passenger start'

Alternatively, edit the nginx16 configuration files as described in the upstream Passenger documentation.