Add additional args and don't install docker
This commit is contained in:
Jip-Hop
parent
ab9f5d93a8
commit
0eb93b0f4e
369
jlmkr.sh
369
jlmkr.sh
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@ -11,7 +11,6 @@ LXC_CACHE_PATH="${LXC_DIR_PATH}/cache"
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LXC_DOWNLOAD_SCRIPT_PATH="${LXC_DIR_PATH}/lxc-download.sh"
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ARCH="$(dpkg --print-architecture)"
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JAILS_DIR_PATH='jails'
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START_JAIL=0
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JAIL_NAME=
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JAIL_PATH=
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DISTRO=
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@ -26,6 +25,12 @@ Usage: ./${SCRIPT_NAME} COMMAND [ARG...]
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TODO: complete writing usage
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"
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fail() {
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echo -e "$1" >&2 && exit 1
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}
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[[ $UID -ne 0 ]] && echo "${USAGE}" && fail "Run this script as root..."
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err() {
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# https://unix.stackexchange.com/a/504829/477308
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echo 'Error occurred:'
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@ -45,19 +50,11 @@ cleanup() {
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# Trap errors and cleanup on exit
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trap 'err $LINENO' ERR && trap cleanup EXIT
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fail() {
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echo -e "$1" >&2 && exit 1
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}
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stat_chmod() {
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# Only run chmod if mode is different from current mode
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if [[ "$(stat -c%a "${2}")" -ne "${1}" ]]; then chmod "${1}" "${2}"; fi
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}
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validate_download_script() {
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echo "6cca2eda73c7358c232fecb4e750b3bf0afa9636efb5de6a9517b7df78be12a4 ${LXC_DOWNLOAD_SCRIPT_PATH}" | sha256sum --check >/dev/null
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}
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read_name() {
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local jail_name
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local jail_path
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@ -91,6 +88,10 @@ read_name() {
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done
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}
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validate_download_script() {
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echo "6cca2eda73c7358c232fecb4e750b3bf0afa9636efb5de6a9517b7df78be12a4 ${LXC_DOWNLOAD_SCRIPT_PATH}" | sha256sum --check >/dev/null
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}
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run_jail() (
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# Create a sub-shell to source the conf file
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@ -133,163 +134,243 @@ run_jail() (
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fi
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)
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[[ $UID -ne 0 ]] && echo "${USAGE}" && fail "Run this script as root..."
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# Properly escape value of variable so it can be echoed to a bash file
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escape() {
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local tmp
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tmp="${1}"
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tmp="$(declare -p tmp)"
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tmp="${tmp#*=}"
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echo "${tmp}"
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}
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read -p "Create a new jail? [Y/n] " -n 1 -r REPLY && echo
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# Enter accepts default (yes)
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# https://stackoverflow.com/a/1885534
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! [[ "${REPLY}" =~ ^([Yy]|)$ ]] && echo "${USAGE}" && exit
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create_jail() {
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[[ "$(basename "${SCRIPT_DIR_PATH}")" != 'jailmaker' ]] && fail "${SCRIPT_NAME} needs to create files.
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read -p "Create a new jail? [Y/n] " -n 1 -r REPLY && echo
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# Enter accepts default (yes)
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# https://stackoverflow.com/a/1885534
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! [[ "${REPLY}" =~ ^([Yy]|)$ ]] && echo "${USAGE}" && exit
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[[ "$(basename "${SCRIPT_DIR_PATH}")" != 'jailmaker' ]] && fail "${SCRIPT_NAME} needs to create files.
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Currently it can't decide if it's safe to create files in:
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${SCRIPT_DIR_PATH}
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Please create a dedicated directory called 'jailmaker', store ${SCRIPT_NAME} there and try again."
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read -p "Start the jail when installation is complete? [Y/n] " -n 1 -r REPLY && echo
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# Enter accepts default (yes)
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[[ "${REPLY}" =~ ^([Yy]|)$ ]] && START_JAIL=1
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if [[ $(findmnt --target . --output TARGET --noheadings --first-only) != /mnt/* ]]; then
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echo "${SCRIPT_NAME} should be on a pool mounted under /mnt (it currently isn't)."
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echo "Storing it on the boot-pool means losing all jails when updating TrueNAS."
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echo "If you continue, jails will be stored under:"
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echo "${SCRIPT_DIR_PATH}"
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read -p "Do you wish to ignore this warning and continue? [y/N] " -n 1 -r REPLY && echo
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# Enter accepts default (no)
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! [[ "${REPLY}" =~ ^[Yy]$ ]] && exit
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fi
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if [[ $(findmnt --target . --output TARGET --noheadings --first-only) != /mnt/* ]]; then
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echo "${SCRIPT_NAME} should be on a pool mounted under /mnt (it currently isn't)."
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echo "Storing it on the boot-pool means losing all jails when updating TrueNAS."
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echo "If you continue, jails will be stored under:"
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echo "${SCRIPT_DIR_PATH}"
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read -p "Do you wish to ignore this warning and continue? [y/N] " -n 1 -r REPLY && echo
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cd "${SCRIPT_DIR_PATH}" || fail "Could not change working directory to ${SCRIPT_DIR_PATH}..."
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# Set appropriate permissions (if not already set) for this file, since it's executed as root
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stat_chmod 700 "${SCRIPT_NAME}"
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# Create the lxc dirs if nonexistent
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mkdir -p "${LXC_DIR_PATH}"
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stat_chmod 700 "${LXC_DIR_PATH}"
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mkdir -p "${LXC_CACHE_PATH}"
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stat_chmod 700 "${LXC_CACHE_PATH}"
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# Create the dir where to store the jails
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mkdir -p "${JAILS_DIR_PATH}"
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stat_chmod 700 "${JAILS_DIR_PATH}"
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# Fetch the lxc download script if not present locally (or hash doesn't match)
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if ! validate_download_script; then
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curl -fSL
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https://raw.githubusercontent.com/Jip-Hop/lxc/58520263041b6864cadad96278848f9b8ce78ee9/templates/lxc-download.in -o "${LXC_DOWNLOAD_SCRIPT_PATH}"
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# Validate after download to prevent executing arbritrary code as root
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validate_download_script || fail 'Abort! Downloaded script has unexpected contents.'
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fi
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stat_chmod 700 "${LXC_DOWNLOAD_SCRIPT_PATH}"
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read -p "Install the recommended distro (Debian 11)? [Y/n] " -n 1 -r REPLY && echo
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if [[ "${REPLY}" =~ ^([Yy]|)$ ]]; then
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DISTRO='debian'
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RELEASE='bullseye'
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else
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echo
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echo "ADVANCED USAGE"
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echo "You may now choose from a list which distro to install."
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echo "Not all of them will work with ${SCRIPT_NAME} (these images are made for LXC)."
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echo "Distros based on systemd probably work (e.g. Ubuntu, Arch Linux and Rocky Linux)."
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echo "Others (Alpine, Devuan, Void Linux) probably won't."
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echo
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read -p "Press any key to continue: " -n 1 -r REPLY && echo
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LXC_CACHE_PATH=${LXC_CACHE_PATH} "${LXC_DOWNLOAD_SCRIPT_PATH}" --list --arch="${ARCH}" || :
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echo "Choose from the DIST column."
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read -e -r -p "Distribution: " DISTRO && echo
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echo "Choose from the RELEASE column (or ARCH if RELEASE is empty)."
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read -e -r -p "Release: " RELEASE && echo
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fi
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read_name
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echo "${SCRIPT_NAME} will not install docker for you."
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echo "But it can configure the jail with the capabilities required to run docker."
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echo "You can turn DOCKER_COMPATIBLE mode on/off post-install."
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echo
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read -p "Make jail docker compatible right now? [y/N] " -n 1 -r REPLY && echo
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# Enter accepts default (no)
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! [[ "${REPLY}" =~ ^[Yy]$ ]] && exit
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fi
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if ! [[ "${REPLY}" =~ ^[Yy]$ ]]; then DOCKER_COMPATIBLE=0; else DOCKER_COMPATIBLE=1; fi
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cd "${SCRIPT_DIR_PATH}" || fail "Could not change working directory to ${SCRIPT_DIR_PATH}..."
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read -p "Give access to the GPU inside the jail? [y/N] " -n 1 -r REPLY && echo
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# Enter accepts default (no)
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if ! [[ "${REPLY}" =~ ^[Yy]$ ]]; then GPU_PASSTHROUGH=0; else GPU_PASSTHROUGH=1; fi
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# Set appropriate permissions (if not already set) for this file, since it's executed as root
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stat_chmod 700 "${SCRIPT_NAME}"
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# TODO: ask for bind mounts (and warn if trying to mount a parent directory of the jailmaker dir?)
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# TODO: ask for network setup (host, macvlan, bridge, physical nic)
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# TODO: ask for additional flags (to bind mount etc.)
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echo "You may pass additional systemd-nspawn flags."
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echo "For example to mount directories inside the jail you may add:"
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echo "--bind=/mnt/a/readwrite/directory --bind-ro=/mnt/a/readonly/directory"
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echo
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echo "WARNING: double check the syntax:"
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echo "https://manpages.debian.org/bullseye/systemd-container/systemd-nspawn.1.en.html"
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echo "With incorrect flags the jail may not start."
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echo "It's possible to correct/add/remove flags post-install."
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echo
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read -e -r -p "Additional flags: " SYSTEMD_NSPAWN_USER_ARGS_STRING && echo
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# Backslashes and colons need to be escaped for systemd-nspawn by the user:
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# e.g. to bind mount a file called:
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# weird chars :?\"
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# the corresponding command would be:
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# --bind-ro='/mnt/data/weird chars \:?\\"'
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local systemd_nspawn_user_args
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eval "$(echo "${SYSTEMD_NSPAWN_USER_ARGS_STRING}" | xargs bash -c 'declare -a systemd_nspawn_user_args=("$@"); declare -p systemd_nspawn_user_args' --)"
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# https://superuser.com/a/1529316/1268213
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# https://superuser.com/a/1627765
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# Create directory for rootfs
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JAIL_ROOTFS_NAME='rootfs'
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JAIL_ROOTFS_PATH="${JAIL_PATH}/${JAIL_ROOTFS_NAME}"
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mkdir -p "${JAIL_ROOTFS_PATH}"
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# Create the lxc dirs if nonexistent
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mkdir -p "${LXC_DIR_PATH}"
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stat_chmod 700 "${LXC_DIR_PATH}"
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mkdir -p "${LXC_CACHE_PATH}"
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stat_chmod 700 "${LXC_CACHE_PATH}"
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JAIL_CONFIG_NAME='config'
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JAIL_CONFIG_PATH="${JAIL_PATH}/${JAIL_CONFIG_NAME}"
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# LXC download script needs to write to this file during install
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# but we don't need it so we will remove it later
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touch "${JAIL_CONFIG_PATH}"
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# Create the dir where to store the jails
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mkdir -p "${JAILS_DIR_PATH}"
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stat_chmod 700 "${JAILS_DIR_PATH}"
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echo
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LXC_CACHE_PATH=${LXC_CACHE_PATH} "${LXC_DOWNLOAD_SCRIPT_PATH}" \
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--name="${JAIL_NAME}" --path="${JAIL_PATH}" --rootfs="${JAIL_ROOTFS_PATH}" \
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--arch="${ARCH}" --dist="${DISTRO}" --release="${RELEASE}" ||
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fail "Aborted creating rootfs..."
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echo
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# Fetch the lxc download script if not present locally (or hash doesn't match)
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if ! validate_download_script; then
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curl -fSL https://raw.githubusercontent.com/lxc/lxc/58520263041b6864cadad96278848f9b8ce78ee9/templates/lxc-download.in -o "${LXC_DOWNLOAD_SCRIPT_PATH}"
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# Validate after download to prevent executing arbritrary code as root
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validate_download_script || fail 'Abort! Downloaded script has unexpected contents.'
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fi
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if [[ "$(basename "$(readlink -f "${JAIL_ROOTFS_PATH}/sbin/init")")" != systemd ]]; then
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echo "Chosen distro appears not to use systemd..."
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echo
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echo "You probably won't get a shell with:"
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echo "machinectl shell ${JAIL_NAME}"
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echo
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echo "You may get a shell with this command:"
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# About nsenter:
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# https://github.com/systemd/systemd/issues/12785#issuecomment-503019081
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# https://github.com/systemd/systemd/issues/3144
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# shellcheck disable=SC2016
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echo 'nsenter -t $(machinectl show '"${JAIL_NAME}"' -p Leader --value) -a /bin/sh -l'
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echo
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echo "Using this distro with ${SCRIPT_NAME} is not recommended."
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echo
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read -p "Abort creating jail? [Y/n] " -n 1 -r REPLY && echo
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# Enter accepts default (yes)
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[[ "${REPLY}" =~ ^([Yy]|)$ ]] && exit
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fi
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stat_chmod 700 "${LXC_DOWNLOAD_SCRIPT_PATH}"
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# Remove file we no longer need
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rm -f "${JAIL_CONFIG_PATH}"
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# Config which systemd handles for us
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rm -f "${JAIL_ROOTFS_PATH}/etc/machine-id"
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rm -f "${JAIL_ROOTFS_PATH}/etc/resolv.conf"
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rm -f "${JAIL_ROOTFS_PATH}/etc/resolv.conf"
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# https://github.com/systemd/systemd/issues/852
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printf 'pts/%d\n' $(seq 0 10) >"${JAIL_ROOTFS_PATH}/etc/securetty"
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read_name
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JAIL_CONFIG_NAME='start.sh'
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JAIL_CONFIG_PATH="${JAIL_PATH}/${JAIL_CONFIG_NAME}"
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# Create directory for rootfs
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JAIL_ROOTFS_PATH="${JAIL_PATH}/rootfs"
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mkdir -p "${JAIL_ROOTFS_PATH}"
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local systemd_run_additional_args systemd_nspawn_additional_args
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systemd_run_additional_args="--unit='${SYSTEMD_RUN_UNIT_NAME}' --description='jailmaker ${JAIL_NAME}'"
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systemd_nspawn_additional_args="--machine='${JAIL_NAME}' --directory='./${JAIL_ROOTFS_NAME}'"
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for i in "${systemd_nspawn_user_args[@]}"; do systemd_nspawn_additional_args+=" $(escape "$i")"; done
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echo "You may choose which distro to install (Ubuntu, CentOS, Alpine etc.)"
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echo "Or you may install the recommended distro: Debian 11."
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read -p "Install Debian 11? [Y/n] " -n 1 -r REPLY && echo
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if [[ "${REPLY}" =~ ^([Yy]|)$ ]]; then
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DISTRO='debian'
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RELEASE='bullseye'
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fi
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cat <<-EOF >"${JAIL_CONFIG_PATH}"
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#!/bin/bash
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# This file will be sourced in a a bash sub-shell by ${SCRIPT_NAME}
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# The start function will be called to start the jail
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# You can change the settings below and/or add custom code
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set -eEuo pipefail
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# Move into the directory where this script is stored (commands are relative to this directory)
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cd "\$(dirname "\${BASH_SOURCE[0]}")" || exit
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JAIL_CONFIG_NAME='config'
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JAIL_CONFIG_PATH="${JAIL_PATH}/${JAIL_CONFIG_NAME}"
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# LXC download script needs to write to this file during install
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# but we don't need it so we will remove it later
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touch "${JAIL_CONFIG_PATH}"
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# Set RUN_DOCKER=1 to automatically add additional arguments required to properly run docker inside the jail
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RUN_DOCKER=${DOCKER_COMPATIBLE}
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# Set GPU_PASSTHROUGH=1 to automatically add additional arguments to access the GPU inside the jail
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GPU_PASSTHROUGH=${GPU_PASSTHROUGH}
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LXC_CACHE_PATH=${LXC_CACHE_PATH} "${LXC_DOWNLOAD_SCRIPT_PATH}" \
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--name="${JAIL_NAME}" --path="${JAIL_PATH}" --rootfs="${JAIL_ROOTFS_PATH}" \
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--arch="${ARCH}" --dist="${DISTRO}" --release="${RELEASE}" ||
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fail "Aborted creating rootfs..."
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echo
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# You may add additional args to the two arrays below
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# These args will be passed to systemd-run and systemd-nspawn in the start function
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SYSTEMD_RUN_ADDITIONAL_ARGS=(${systemd_run_additional_args})
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SYSTEMD_NSPAWN_ADDITIONAL_ARGS=(${systemd_nspawn_additional_args})
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# Remove file we no longer need
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rm -f "${JAIL_CONFIG_PATH}"
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# Config which systemd handles for us
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rm -f "${JAIL_ROOTFS_PATH}/etc/machine-id"
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rm -f "${JAIL_ROOTFS_PATH}/etc/resolv.conf"
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rm -f "${JAIL_ROOTFS_PATH}/etc/resolv.conf"
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# https://github.com/systemd/systemd/issues/852
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# printf 'pts/%d\n' $(seq 0 10) >"${JAIL_ROOTFS_PATH}/etc/securetty"
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start(){
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# Use mostly default settings for systemd-nspawn but with systemd-run instead of a service file
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# https://github.com/systemd/systemd/blob/main/units/systemd-nspawn%40.service.in
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systemd-run --property=KillMode=mixed --property=Type=notify --property=RestartForceExitStatus=133 \\
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--property=SuccessExitStatus=133 --property=Delegate=yes --property=TasksMax=16384 --same-dir \\
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--collect --setenv=SYSTEMD_NSPAWN_LOCK=0 \\
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"\${SYSTEMD_RUN_ADDITIONAL_ARGS[@]}" \\
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-- \\
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systemd-nspawn --keep-unit --quiet --boot \\
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"\${SYSTEMD_NSPAWN_ADDITIONAL_ARGS[@]}"
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}
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read -p "Give access to the GPU inside the jail? [y/N] " -n 1 -r REPLY && echo
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# Enter accepts default (no)
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if ! [[ "${REPLY}" =~ ^[Yy]$ ]]; then GPU_PASSTHROUGH=0; else GPU_PASSTHROUGH=1; fi
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# Call the start function if this script is executed directly (not sourced)
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# https://stackoverflow.com/a/28776166
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(return 0 2>/dev/null) || {
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echo 'This script was called directly, not sourced.'
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echo 'The jail will now start...'
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echo 'But the RUN_DOCKER and GPU_PASSTHROUGH settings are not considered.'
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echo 'For this to work, start the jail from ${SCRIPT_NAME}.'
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start
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}
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EOF
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# TODO: ask for additional flags (to bind mount etc.)
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# TODO: ask for network setup (host, macvlan, bridge, physical nic)
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echo "FROM CONF"
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cat "${JAIL_CONFIG_PATH}"
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chmod 700 "${JAIL_CONFIG_PATH}"
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read -p "Install Docker inside the jail? [y/N] " -n 1 -r REPLY && echo
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# Enter accepts default (no)
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if ! [[ "${REPLY}" =~ ^[Yy]$ ]]; then INSTALL_DOCKER=0; else INSTALL_DOCKER=1; fi
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if [[ "${INSTALL_DOCKER}" -eq 1 ]]; then
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DOCKER_INSTALL_SCRIPT_NAME='get-docker.sh'
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DOCKER_INSTALL_SCRIPT_PATH="${JAIL_ROOTFS_PATH}/${DOCKER_INSTALL_SCRIPT_NAME}"
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curl -fsSL https://get.docker.com -o "${DOCKER_INSTALL_SCRIPT_PATH}"
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chmod +x "${DOCKER_INSTALL_SCRIPT_PATH}"
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echo "Running docker install script..."
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systemd-nspawn -q -D "${JAIL_ROOTFS_PATH}" "./${DOCKER_INSTALL_SCRIPT_NAME}"
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rm "${DOCKER_INSTALL_SCRIPT_PATH}"
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# TODO: also install nvidia-docker2 if GPU_PASSTHROUGH=1 and nvidia GPU is present
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fi
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echo "Done creating the jail."
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DONE=1
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echo
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read -p "Start the jail now? [Y/n] " -n 1 -r REPLY && echo
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# Enter accepts default (yes)
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if [[ "${REPLY}" =~ ^([Yy]|)$ ]]; then
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run_jail "${JAIL_CONFIG_PATH}"
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else
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echo 'Skipped starting jail.'
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fi
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}
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JAIL_CONFIG_NAME='start.sh'
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JAIL_CONFIG_PATH="${JAIL_PATH}/${JAIL_CONFIG_NAME}"
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create_jail
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cat <<-EOF >"${JAIL_CONFIG_PATH}"
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#!/bin/bash
|
||||
# This file will be sourced in a a bash sub-shell by ${SCRIPT_NAME}.
|
||||
# The start function will be called to start the jail.
|
||||
# You can change the settings below and/or add custom code.
|
||||
set -eEuo pipefail
|
||||
|
||||
# Set RUN_DOCKER=1 to automatically add additional arguments required to properly run docker inside the jail
|
||||
RUN_DOCKER=${INSTALL_DOCKER}
|
||||
# Set GPU_PASSTHROUGH=1 to automatically add additional arguments to access the GPU inside the jail
|
||||
GPU_PASSTHROUGH=${GPU_PASSTHROUGH}
|
||||
|
||||
# You may add additional args to the two arrays below.
|
||||
# These args will be passed to systemd-run and systemd-nspawn in the start function.
|
||||
SYSTEMD_RUN_ADDITIONAL_ARGS=()
|
||||
SYSTEMD_NSPAWN_ADDITIONAL_ARGS=()
|
||||
|
||||
start(){
|
||||
systemd-run --property=KillMode=mixed --property=Type=notify --property=RestartForceExitStatus=133 \
|
||||
--property=SuccessExitStatus=133 --property=Delegate=yes --property=TasksMax=16384 --same-dir \
|
||||
--collect \
|
||||
--setenv=SYSTEMD_NSPAWN_LOCK=0 \
|
||||
--unit='${SYSTEMD_RUN_UNIT_NAME}' \
|
||||
--description='jailmaker ${JAIL_NAME}' \
|
||||
"\${SYSTEMD_RUN_ADDITIONAL_ARGS[@]}" \
|
||||
-- \
|
||||
systemd-nspawn --keep-unit --quiet --boot \
|
||||
--machine='${JAIL_NAME}' \
|
||||
--directory='./${JAIL_ROOTFS_PATH}' \
|
||||
"\${SYSTEMD_NSPAWN_ADDITIONAL_ARGS[@]}"
|
||||
}
|
||||
|
||||
# Call the start function if this script is executed directly (not sourced)
|
||||
# https://stackoverflow.com/a/28776166
|
||||
(return 0 2>/dev/null) || {
|
||||
echo 'This script was called directly, not sourced.'
|
||||
echo 'The jail will now start...'
|
||||
echo 'But the RUN_DOCKER and GPU_PASSTHROUGH settings are not considered.'
|
||||
echo 'For this to work, start the jail from ${SCRIPT_NAME}.'
|
||||
start
|
||||
}
|
||||
EOF
|
||||
|
||||
echo "FROM CONF"
|
||||
cat "${JAIL_CONFIG_PATH}"
|
||||
chmod 700 "${JAIL_CONFIG_PATH}"
|
||||
|
||||
echo $START_JAIL
|
||||
if [[ "${START_JAIL}" -eq 1 ]]; then run_jail "${JAIL_CONFIG_PATH}"; else echo "Skip running jail"; fi
|
||||
|
||||
DONE=1
|
||||
# TODO document
|
||||
# machinectl shell
|
||||
# If that doesn't work try
|
||||
# machinectl login
|
||||
# But since there's no root password set, that won't work either
|
||||
# So you'd have to get a shell via
|
||||
# nsenter -t $(machinectl show alpine -p Leader --value) -a /bin/sh -l
|
||||
# Then set a root password via passwd
|
||||
# Then you may login via
|
||||
# machinectl login
|
||||
# TODO: recommend ssh ;)
|
||||
# TODO: create a jlmkr shell command to try the above in case machinectl shell doesn't work
|
||||
|
|
|
|||
Loading…
Reference in New Issue