Host requirements

These are guidelines for whether a machine can run Nornir. They are not measured installer checks. Production dataset size, scratch disk, and GPU class are in Production envelope.

Pyre on Windows

  • 64-bit Windows.

  • A GPU and driver that can open an OpenGL window.

  • The Windows installer does not need Python, Git, or CUDA. It does not include CuPy. See Installing Pyre on Windows.

  • A developer build needs Python 3.13+ and the host virtual environment venv/pyre314. See Pyre development.

Headless pipeline on a workstation

  • 64-bit operating system. Development has focused on Windows; Docker images are Linux.

  • Python 3.13+ for a host install of nornir-build.

  • Plan on about 2 GB of RAM per CPU core you will keep busy. That is a sizing guideline, not a startup check. Heavy pipelines sometimes need closer to 3 GB per core; see Production envelope.

Docker hosts

  • Servers: Ubuntu 24.04 or 26.04 with Docker Engine, the compose v2 plugin, PowerShell 7, and cifs-utils; bootstrap-ubuntu.sh installs them. Workstations: Docker Desktop with WSL2 and PowerShell 7.

  • The CIFS kernel module when the build container mounts NAS shares.

  • nornir:prod is CPU-only and does not need a GPU.

  • nornir:dev and nornir:cupy need an NVIDIA driver on the host (and the NVIDIA container toolkit on Linux) and a GPU with compute capability 7.5 or newer (Turing and later). The image does not need a GPU at build time; pass --gpus all (or the launcher’s GPU switch) at run time.

  • Container images use Python 3.14 and do not ship Pyre.

  • Tile I/O on CIFS needs a raised open-file limit. Launchers set nofile to 65536. Confirm with ulimit -n inside the container.

Host layout, launchers, and every container role are in Deployment and configuration.