Manage and access HPC application environments.

Flight Environment provides access to common package environments for managing HPC applications and libraries. Multiple environments can be managed with the ability to switch between them as required.

Flight Environment is available as part of the Flight User Suite. This is the easiest method for installing Flight Environment and all its dependencies. It is documented in the OpenFlight Documentation.

While manual installation is not normally required or recommended, if you're not using Enterprise Linux or want to set things up yourself directly from the repository, you can do so by following the steps below.

Flight Environment is developed and tested with Ruby version 2.7.1 and bundler 2.1.4. Other versions may work but currently are not officially supported.

The following will install from source using git. The master branch is the current development version and may not be appropriate for a production installation. Instead a tagged version should be checked out.

git clone https://github.com/alces-flight/flight-env.git
cd flight-env
git checkout <tag>
bundle install

Use the script located at bin/flenv to execute the tool.

Making changes to the default configuration is optional and can be achieved by creating a config.yml file in the etc/ subdirectory of the tool. A config.yml.ex file is distributed which outlines all the configuration values available:

• global_depot_path - This setting defines where global ecosystems should be installed, it is recommended that this be somewhere accessible by all users on the system (defaults to /opt/flight/var/lib/env)
• global_build_cache_path - This setting defines where global ecosystems are built (the location of build logs, dependencies and other information on the build) (defaults to /opt/flight/var/cache/env/build)

A brief usage guide is given below. More details can be found by running bin/flenv --help. If Flight Environment was installed via the OpenFlight package repos, you can read more detailed usage instructions by running flight howto show flight env.

Display the range of available software ecosystems using the avail command.

Create an ecosystem with the create command, providing the argument of an ecosystem from the list above.

Activate an ecosystem using the activate command, this will expose the ecosystem's commands to the shell. Exit the ecosystem using the deactivate command.

Show the configured ecosystems using the list command.

Remove an ecosystem using the purge command.

See the help command for further details and information about other commands. Further information and examples of the env command are available in the OpenFlight documentation.

Fork the project. Make your feature addition or bug fix. Send a pull request. Bonus points for topic branches.

Read CONTRIBUTING.md for more details.

Eclipse Public License 2.0, see LICENSE.txt for details.

Copyright (C) 2019-present Alces Flight Ltd.

This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0 which is available at https://www.eclipse.org/legal/epl-2.0, or alternative license terms made available by Alces Flight Ltd - please direct inquiries about licensing to licensing@alces-flight.com.

Flight Environment is distributed in the hope that it will be useful, but WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the Eclipse Public License 2.0 for more details.