jailmaker/templates/docker/config

startup=0
gpu_passthrough_intel=0
gpu_passthrough_nvidia=0
# Turning off seccomp filtering improves performance at the expense of security
seccomp=1

# Use macvlan networking to provide an isolated network namespace,
# so docker can manage firewall rules
# Alternatively use --network-macvlan=eno1 instead of --network-bridge
# Ensure to change eno1/br1 to the interface name you want to use
# You may want to add additional options here, e.g. bind mounts
systemd_nspawn_user_args=--network-bridge=br1
    --resolv-conf=bind-host
    --system-call-filter='add_key keyctl bpf'

# Script to run on the HOST before starting the jail
# Load kernel module and config kernel settings required for docker
pre_start_hook=#!/usr/bin/bash
    set -euo pipefail
    echo 'PRE_START_HOOK'
    echo 1 > /proc/sys/net/ipv4/ip_forward
    modprobe br_netfilter
    echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
    echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables

# Only used while creating the jail
distro=debian
release=bookworm

# Install docker inside the jail:
# https://docs.docker.com/engine/install/debian/#install-using-the-repository
# Will also install the NVIDIA Container Toolkit if gpu_passthrough_nvidia=1 during initial setup
# https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html
initial_setup=#!/usr/bin/bash
    set -euo pipefail

    apt-get update && apt-get -y install ca-certificates curl
    install -m 0755 -d /etc/apt/keyrings
    curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
    chmod a+r /etc/apt/keyrings/docker.asc

    echo \
    "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
    $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
    tee /etc/apt/sources.list.d/docker.list > /dev/null
    
    apt-get update
    apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
    
    # The /usr/bin/nvidia-smi will be present when gpu_passthrough_nvidia=1
    if [ -f /usr/bin/nvidia-smi ]; then
        curl -fsSL https://nvidia.github.io/libnvidia-container/gpgkey -o /etc/apt/keyrings/nvidia.asc
        chmod a+r /etc/apt/keyrings/nvidia.asc
        curl -s -L https://nvidia.github.io/libnvidia-container/stable/deb/nvidia-container-toolkit.list | \
        sed 's#deb https://#deb [signed-by=/etc/apt/keyrings/nvidia.asc] https://#g' | \
        tee /etc/apt/sources.list.d/nvidia-container-toolkit.list

        apt-get update
        apt-get install -y nvidia-container-toolkit

        nvidia-ctk runtime configure --runtime=docker
        systemctl restart docker
    fi

    docker info

# You generally will not need to change the options below
systemd_run_default_args=--property=KillMode=mixed
    --property=Type=notify
    --property=RestartForceExitStatus=133
    --property=SuccessExitStatus=133
    --property=Delegate=yes
    --property=TasksMax=infinity
    --collect
    --setenv=SYSTEMD_NSPAWN_LOCK=0

systemd_nspawn_default_args=--keep-unit
    --quiet
    --boot
    --bind-ro=/sys/module
    --inaccessible=/sys/module/apparmor