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#! /bin/bash # # Copyright (c) 2017, 2018 NVIDIA CORPORATION. # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA set -eu # NVIDIA_VISIBLE_DEVICES="" *or* NVIDIA_VISIBLE_DEVICES="void" # GPU support was explicitly disabled, exit early. if [ -z "${NVIDIA_VISIBLE_DEVICES-x}" ] || [ "${NVIDIA_VISIBLE_DEVICES:-}" = "void" ]; then exit 0 fi # https://github.com/nvidia/nvidia-container-runtime#cuda_version if [ -n "${CUDA_VERSION:-}" ] && [ -z "${NVIDIA_REQUIRE_CUDA:-}" ]; then # Legacy CUDA image: default to all devices and all driver capabilities. if [ -z "${NVIDIA_VISIBLE_DEVICES+x}" ]; then NVIDIA_VISIBLE_DEVICES="all" fi if [ -z "${NVIDIA_DRIVER_CAPABILITIES:-}" ]; then NVIDIA_DRIVER_CAPABILITIES="all" fi if [[ "${CUDA_VERSION}" =~ ^[0-9]+\.[0-9]+ ]]; then NVIDIA_REQUIRE_CUDA="cuda>=${BASH_REMATCH[0]}" fi else # NVIDIA_VISIBLE_DEVICES unset and it's not a legacy CUDA image. # This is not a GPU image, exit early. if [ -z "${NVIDIA_VISIBLE_DEVICES+x}" ]; then exit 0 fi fi export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin if ! command -v nvidia-container-cli >/dev/null; then echo "ERROR: Missing tool nvidia-container-cli, see https://github.com/NVIDIA/libnvidia-container" >&2 exit 1 fi in_userns() { [ -e /proc/self/uid_map ] || { echo no; return; } while read line; do fields=$(echo $line | awk '{ print $1 " " $2 " " $3 }') [ "$fields" = "0 0 4294967295" ] && { echo no; return; } || true echo $fields | grep -q " 0 1$" && { echo userns-root; return; } || true done < /proc/self/uid_map if [ -e /proc/1/uid_map ]; then if [ "$(cat /proc/self/uid_map)" = "$(cat /proc/1/uid_map)" ]; then echo userns-root return fi fi echo yes } get_ldconfig() { command -v "ldconfig.real" || command -v "ldconfig" return $? } capability_to_cli() { case "$1" in compute) echo "--compute";; compat32) echo "--compat32";; display) echo "--display";; graphics) echo "--graphics";; utility) echo "--utility";; video) echo "--video";; *) exit 1;; esac return } # Same behavior as strconv.ParseBool in golang parse_bool() { case "$1" in 1|t|T|TRUE|true|True) echo "true";; 0|f|F|FALSE|false|False) echo "false";; *) exit 1;; esac return } usage() { cat <<EOF nvidia-container-cli hook for LXC Special arguments: [ -h | --help ]: Print this help message and exit. Optional arguments: [ --no-load-kmods ]: Do not try to load the NVIDIA kernel modules. [ --disable-require ]: Disable all the constraints of the form NVIDIA_REQUIRE_*. [ --debug <path> ]: The path to the log file. [ --ldcache <path> ]: The path to the host system's DSO cache. [ --root <path> ]: The path to the driver root directory. [ --ldconfig <path> ]: The path to the ldconfig binary, use a '@' prefix for a host path. EOF return 0 } options=$(getopt -o h -l help,no-load-kmods,disable-require,debug:,ldcache:,root:,ldconfig: -- "$@") if [ $? -ne 0 ]; then usage exit 1 fi eval set -- "$options" CLI_LOAD_KMODS="true" CLI_DISABLE_REQUIRE="false" CLI_DEBUG= CLI_LDCACHE= CLI_ROOT= CLI_LDCONFIG= while :; do case "$1" in --help) usage && exit 1;; --no-load-kmods) CLI_LOAD_KMODS="false"; shift 1;; --disable-require) CLI_DISABLE_REQUIRE="true"; shift 1;; --debug) CLI_DEBUG=$2; shift 2;; --ldcache) CLI_LDCACHE=$2; shift 2;; --root) CLI_ROOT=$2; shift 2;; --ldconfig) CLI_LDCONFIG=$2; shift 2;; --) shift 1; break;; *) break;; esac done HOOK_SECTION= HOOK_TYPE= case "${LXC_HOOK_VERSION:-0}" in 0) HOOK_SECTION="${2:-}"; HOOK_TYPE="${3:-}";; 1) HOOK_SECTION="${LXC_HOOK_SECTION:-}"; HOOK_TYPE="${LXC_HOOK_TYPE:-}";; *) echo "ERROR: Unsupported hook version: ${LXC_HOOK_VERSION}." >&2; exit 1;; esac if [ "${HOOK_SECTION}" != "lxc" ]; then echo "ERROR: Not running through LXC." >&2 exit 1 fi if [ "${HOOK_TYPE}" != "mount" ]; then echo "ERROR: This hook must be used as a \"mount\" hook." >&2 exit 1 fi USERNS=$(in_userns) if [ "${USERNS}" != "yes" ]; then # This is a limitation of libnvidia-container. echo "FIXME: This hook currently only works in unprivileged mode." >&2 exit 1 fi if [ "${USERNS}" = "yes" ]; then CLI_LOAD_KMODS="false" if ! grep -q nvidia_uvm /proc/modules; then echo "WARN: Kernel module nvidia_uvm is not loaded, nvidia-container-cli might fail. Make sure the NVIDIA device driver is installed and loaded." >&2 fi fi # https://github.com/nvidia/nvidia-container-runtime#nvidia_disable_require if [ -n "${NVIDIA_DISABLE_REQUIRE:-}" ]; then if [ "$(parse_bool "${NVIDIA_DISABLE_REQUIRE}")" = "true" ]; then CLI_DISABLE_REQUIRE="true" fi fi if [ -z "${CLI_DEBUG}" ]; then if [ "${LXC_LOG_LEVEL}" = "DEBUG" ] || [ "${LXC_LOG_LEVEL}" = "TRACE" ]; then rootfs_path="${LXC_ROOTFS_PATH#*:}" hookdir="${rootfs_path/%rootfs/hook}" if mkdir -p "${hookdir}"; then CLI_DEBUG="${hookdir}/nvidia.log" fi fi fi # A '@' prefix means a host path. if [ -z "${CLI_LDCONFIG}" ]; then if host_ldconfig=$(get_ldconfig); then CLI_LDCONFIG="@${host_ldconfig}" fi fi # https://github.com/nvidia/nvidia-container-runtime#nvidia_visible_devices CLI_DEVICES="${NVIDIA_VISIBLE_DEVICES}" # https://github.com/nvidia/nvidia-container-runtime#nvidia_driver_capabilities CLI_CAPABILITIES= if [ -n "${NVIDIA_DRIVER_CAPABILITIES:-}" ]; then CLI_CAPABILITIES="${NVIDIA_DRIVER_CAPABILITIES//,/ }" fi if [ "${CLI_CAPABILITIES}" = "all" ]; then CLI_CAPABILITIES="compute compat32 display graphics utility video" fi if [ -z "${CLI_CAPABILITIES}" ]; then CLI_CAPABILITIES="utility" fi global_args=() configure_args=() if [ -n "${CLI_DEBUG}" ]; then echo "INFO: Writing nvidia-container-cli log at ${CLI_DEBUG}." >&2 global_args+=("--debug=${CLI_DEBUG}") fi if [ "${CLI_LOAD_KMODS}" = "true" ]; then global_args+=(--load-kmods) fi if [ "${USERNS}" = "yes" ]; then global_args+=(--user) configure_args+=(--no-cgroups) fi if [ -n "${CLI_LDCACHE}" ]; then global_args+=(--ldcache="${CLI_LDCACHE}") fi if [ -n "${CLI_ROOT}" ]; then global_args+=(--root="${CLI_ROOT}") fi if [ -n "${CLI_LDCONFIG}" ]; then configure_args+=(--ldconfig="${CLI_LDCONFIG}") fi if [ -n "${CLI_DEVICES}" ] && [ "${CLI_DEVICES}" != "none" ]; then configure_args+=(--device="${CLI_DEVICES}") fi for cap in ${CLI_CAPABILITIES}; do if arg=$(capability_to_cli "${cap}"); then configure_args+=("${arg}") else echo "ERROR: Unknown driver capability \"${cap}\"." >&2 exit 1 fi done # https://github.com/nvidia/nvidia-container-runtime#nvidia_require_ if [ "${CLI_DISABLE_REQUIRE}" = "false" ]; then for req in $(compgen -e "NVIDIA_REQUIRE_"); do configure_args+=("--require=${!req}") done fi if [ -d "/sys/kernel/security/apparmor" ]; then # Try to transition to the unconfined AppArmor profile. echo "changeprofile unconfined" > /proc/self/attr/current || true fi set -x exec nvidia-container-cli ${global_args[@]} configure "${configure_args[@]}" "${LXC_ROOTFS_MOUNT}"