README
¶
Apptainer
- Documentation
- Support
- Community Meetings / Minutes / Roadmap
- Project License
- Guidelines for Contributing
- Code of Conduct
- Citation
What is Apptainer?
Apptainer is an open source container platform designed to be simple, fast, and secure. Many container platforms are available, but Apptainer is designed for ease-of-use on shared systems and in high performance computing (HPC) environments. It features:
- An immutable single-file container image format, supporting cryptographic signatures and encryption.
- Integration over isolation by default. Easily make use of GPUs, high speed networks, parallel filesystems on a cluster or server.
- Mobility of compute. The single file SIF container format is easy to transport and share.
- A simple, effective security model. You are the same user inside a container as outside, and cannot gain additional privilege on the host system by default.
Apptainer is open source software, distributed under the BSD License.
Apptainer was formerly known as Singularity and is now a part of the Linux Foundation. When migrating from Singularity see the admin migration documentation and user compatibility documentation.
Check out talks about Apptainer and some use cases of Apptainer on our website.
Getting Started with Apptainer
To install Apptainer from source, see the installation instructions. For other installation options, see our guide.
System administrators can learn how to configure Apptainer, and get an overview of its architecture and security features in the administrator guide.
For users, see the user guide for details on how to run and build containers with Apptainer.
Contributing to Apptainer
Community contributions are always greatly appreciated. To start developing Apptainer, check out the guidelines for contributing.
Please note we have a code of conduct. Please follow it in all your interactions with the project members and users.
Our roadmap, other documents, and user/developer meeting information can be found in the apptainer community page.
We also welcome contributions to our user guide and admin guide.
Support
To get help with Apptainer, check out the Apptainer Help web page.
Go Version Compatibility
Apptainer aims to maintain support for the two most recent stable versions of Go. This corresponds to the Go Release Maintenance Policy and Security Policy, ensuring critical bug fixes and security patches are available for all supported language versions.
Citing Apptainer
Apptainer can be cited using its former name Singularity.
The Singularity software may be cited using our Zenodo DOI 10.5281/zenodo.1310023:
Singularity Developers (2021) Singularity. 10.5281/zenodo.1310023 https://doi.org/10.5281/zenodo.1310023
This is an 'all versions' DOI for referencing Singularity in a manner that is not version-specific. You may wish to reference the particular version of Singularity used in your work. Zenodo creates a unique DOI for each release, and these can be found in the 'Versions' sidebar on the Zenodo record page.
Please also consider citing the original publication describing Singularity:
Kurtzer GM, Sochat V, Bauer MW (2017) Singularity: Scientific containers for mobility of compute. PLoS ONE 12(5): e0177459. https://doi.org/10.1371/journal.pone.0177459
License
Unless otherwise noted, this project is licensed under a 3-clause BSD license found in the license file.
Directories
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| Path | Synopsis |
|---|---|
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cmd
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dist
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internal/testhelper
Package testhelper contains a collection of test helper functions that are specific to the way E2E tests are executed.
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Package testhelper contains a collection of test helper functions that are specific to the way E2E tests are executed. |
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push
Package push tests only test the oras transport (and a invalid transport) against a local registry
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Package push tests only test the oras transport (and a invalid transport) against a local registry |
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examples
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internal
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pkg/build/apps
Package apps [apps-plugin] provides the functions which are necessary for adding SCI-F apps support to Singularity 3.0.0.
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Package apps [apps-plugin] provides the functions which are necessary for adding SCI-F apps support to Singularity 3.0.0. |
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pkg/build/oci
Package oci provides transparent caching of oci-like refs
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Package oci provides transparent caching of oci-like refs |
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pkg/cache
Package cache provides support for caching SIF, OCI, SHUB images and any OCI layers used to build them
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Package cache provides support for caching SIF, OCI, SHUB images and any OCI layers used to build them |
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pkg/syecl
Package syecl implements the loading and management of the container execution control list feature.
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Package syecl implements the loading and management of the container execution control list feature. |
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pkg/util/bin
Package bin provides access to external binaries
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Package bin provides access to external binaries |
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pkg/util/interactive
Package interactive implements all the functions to interactively interact with users
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Package interactive implements all the functions to interactively interact with users |
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pkg
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image
Package image provides underlying data types for Apptainer image formats.
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Package image provides underlying data types for Apptainer image formats. |
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syfs
Package syfs provides functions to access apptainer's file system layout.
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Package syfs provides functions to access apptainer's file system layout. |
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sylog
Package sylog implements a basic logger for Apptainer Go code to log messages in the same format as apptainer_message() from C code
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Package sylog implements a basic logger for Apptainer Go code to log messages in the same format as apptainer_message() from C code |
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sypgp
Package sypgp implements the openpgp integration into the apptainer project.
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Package sypgp implements the openpgp integration into the apptainer project. |
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expand-env is a simple program that reads stdin, replaces all occurrences of @VAR@ by the corresponding value of VAR in the current environment, and writes the result to stdout.
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expand-env is a simple program that reads stdin, replaces all occurrences of @VAR@ by the corresponding value of VAR in the current environment, and writes the result to stdout. |