Multi-screen (Multi-GPU) XFCE Settings

deploy-desktop-environment.sh

#!/bin/bash
# Copyright (c) 2023 Ho Kim ([email protected]). All rights reserved.

# Prehibit errors
set -e -o pipefail
# Verbose
set -x

# Configure command-line arguments
SCREEN=$1

# Set local variables
DESKTOP_HOME="${HOME}/desktop/${SCREEN}"

# Install nvidia-ctk and generate NVIDIA GPU CDI
sudo dnf install -y nvidia-container-toolkit-base
mkdir -p /etc/cdi
nvidia-ctk cdi generate --device-name-strategy=type-index --format=json >/etc/cdi/nvidia.json 2>/dev/null

# Create a container-wise home directory
mkdir -p "${DESKTOP_HOME}"

# Build a desktop environment image
docker build --tag desktop .

# Spawn a desktop environment per screen
podman run -d --privileged \
    --device nvidia.com/gpu=all \
    --env "DISPLAY=:0.${SCREEN}" \
    --name "desktop-${SCREEN}" \
    --net host \
    --restart unless-stopped \
    --volume "${DESKTOP_HOME}:/root:rw" \
    --volume /tmp/.ICE-unix:/tmp/.ICE-unix:rw \
    --volume /tmp/.X11-unix:/tmp/.X11-unix:rw \
    --volume /var/lib/dbus/machine-id:/var/lib/dbus/machine-id:ro \
    --user $(id -u) \
    --group-add $(id -g) \
    desktop

# Finished!
exec echo "OK!"

Dockerfile

# Copyright (c) 2023 Ho Kim ([email protected]). All rights reserved.

# Configure environment variables
ARG ROCKYLINUX_VERSION="8"

# Be ready for serving
FROM "quay.io/rockylinux/rockylinux:${ROCKYLINUX_VERSION}" as base

# Install desktop environment dependencies
RUN dnf install -y \
    epel-release \
    && dnf install -y \
    dbus-x11 \
    file-roller \
    mesa-dri-drivers \
    sqlite \
    Thunar thunar-archive-plugin thunar-volman \
    xfce4-appfinder xfce4-notifyd xfce4-panel xfce4-pulseaudio-plugin \
    xfce4-session xfce4-settings xfce4-terminal \
    xfconf xfdesktop xfwm4 \
    # Cleanup
    && dnf clean all \
    && rm -rf /var/cache /var/log/dnf* /var/log/yum.*

# Execute xfce4-session after init
ENTRYPOINT [ "/usr/bin/env" ]
CMD [ "bash", "-c", "sleep 1; xfce4-session" ]

xorg.conf.example

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    Screen      1  "Screen1" Below "Screen0"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/input/mice"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "NVIDIA TITAN V"
    BusID          "PCI:115:0:0"
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "NVIDIA TITAN V"
    BusID          "PCI:166:0:0"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection