Admin Guide

Welcome to the Apptainer Admin Guide!

This guide aims to cover installation instructions, configuration detail, and other topics important to system administrators working with Apptainer.

See the user guide for more information about how to use Apptainer.

• Admin Quickstart
  • Architecture of Apptainer
  • Apptainer Security
  • Installation from Source
  • Configuration
  • Test Apptainer
• Installing Apptainer
  • Installation on Linux
  • Installation on Windows or Mac
• Migrating from Singularity
• Configuration files
  • apptainer.conf
  • cgroups.toml
  • ecl.toml
  • GPU Library Configuration
  • capability.json
  • seccomp-profiles
  • remote.yaml
  • dmtcp-conf.yaml
• User Namespaces & Fakeroot
  • User Namespace Requirements
  • Unprivileged Installations
  • –userns option
  • Fakeroot feature
• Security in Apptainer
  • Security Policy
  • Background
  • Setuid & User Namespaces
  • Runtime & User Privilege Model
  • Singularity Image Format (SIF)
  • Configuration & Runtime Options
• Appendix
• License