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libremiami-search/utils/lxc.sh

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#!/usr/bin/env bash
# -*- coding: utf-8; mode: sh indent-tabs-mode: nil -*-
# SPDX-License-Identifier: AGPL-3.0-or-later
# shellcheck source=utils/lib.sh
source "$(dirname "${BASH_SOURCE[0]}")/lib.sh"
source_dot_config
# load environment of the LXC suite
LXC_ENV="${LXC_ENV:-${REPO_ROOT}/utils/lxc-searx.env}"
source "$LXC_ENV"
lxc_set_suite_env
# ----------------------------------------------------------------------------
# config
# ----------------------------------------------------------------------------
#
# read also:
# - https://lxd.readthedocs.io/en/latest/
LXC_HOST_PREFIX="${LXC_HOST_PREFIX:-test}"
# where all folders from HOST are mounted
LXC_SHARE_FOLDER="/share"
LXC_REPO_ROOT="${LXC_SHARE_FOLDER}/$(basename "${REPO_ROOT}")"
ubu1604_boilerplate="
export DEBIAN_FRONTEND=noninteractive
apt-get update -y
apt-get upgrade -y
apt-get install -y git curl wget
"
ubu1804_boilerplate="$ubu1604_boilerplate"
ubu1904_boilerplate="$ubu1804_boilerplate"
ubu1910_boilerplate="$ubu1904_boilerplate"
# shellcheck disable=SC2034
ubu2004_boilerplate="
$ubu1910_boilerplate
echo 'Set disable_coredump false' >> /etc/sudo.conf
"
# shellcheck disable=SC2034
archlinux_boilerplate="
pacman -Syu --noconfirm
pacman -S --noconfirm git curl wget sudo
echo 'Set disable_coredump false' >> /etc/sudo.conf
"
# shellcheck disable=SC2034
fedora31_boilerplate="
dnf update -y
dnf install -y git curl wget hostname
echo 'Set disable_coredump false' >> /etc/sudo.conf
"
REMOTE_IMAGES=()
CONTAINERS=()
LOCAL_IMAGES=()
for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
REMOTE_IMAGES=("${REMOTE_IMAGES[@]}" "${LXC_SUITE[i]}")
CONTAINERS=("${CONTAINERS[@]}" "${LXC_HOST_PREFIX}-${LXC_SUITE[i+1]}")
LOCAL_IMAGES=("${LOCAL_IMAGES[@]}" "${LXC_SUITE[i+1]}")
done
HOST_USER="${SUDO_USER:-$USER}"
HOST_USER_ID=$(id -u "${HOST_USER}")
HOST_GROUP_ID=$(id -g "${HOST_USER}")
# ----------------------------------------------------------------------------
usage() {
# ----------------------------------------------------------------------------
_cmd="$(basename "$0")"
cat <<EOF
usage::
$_cmd build [containers]
$_cmd copy [images]
$_cmd remove [containers|<name>|images|subordinate]
$_cmd add [subordinate]
$_cmd [start|stop] [containers|<name>]
$_cmd show [info|config|suite|images]
$_cmd cmd [--|<name>] ...
$_cmd install [suite]
build
:containers: build & launch all LXC containers of the suite
copy:
:images: copy remote images of the suite into local storage
remove
:containers: delete all 'containers' or only <container-name>
:images: delete local images of the suite
add / remove
:subordinate: LXD permission to map ${HOST_USER}'s user/group id through
start/stop
:containers: start/stop all 'containers' from the suite
:<name>: start/stop conatiner <name> from suite
show
:info: show info of all the containers from LXC suite
:config: show config of all the containers from the LXC suite
:suite: show services of all the containers from the LXC suite
:images: show information of local images
cmd
-- run command ... in all containers of the LXC suite
:<name>: run command ... in container <name>
install
:suite: install LXC suite, includes morty & filtron
Images of the LXC suite:
$(echo " ${LOCAL_IMAGES[*]}" | $FMT)
Containers of the LXC suite:
$(echo " ${CONTAINERS[*]}" | $FMT)
EOF
[ -n "${1+x}" ] && err_msg "$1"
}
lxd_info() {
cat <<EOF
LXD is needed, to install run::
snap install lxd
lxd init --auto
EOF
}
main() {
local exit_val
local _usage="unknown or missing $1 command $2"
# don't check prerequisite when in recursion
if [[ ! $1 == __* ]]; then
! required_commands lxc && lxd_info && exit 42
[[ -z $LXC_SUITE ]] && err_msg "missing LXC_SUITE" && exit 42
fi
case $1 in
--source-only) ;;
-h|--help) usage; exit 0;;
build)
sudo_or_exit
case $2 in
''|containers) build_instances ;;
*) usage "$_usage"; exit 42;;
esac
;;
copy)
case $2 in
''|images) lxc_copy_images_localy;;
*) usage "$_usage"; exit 42;;
esac
;;
remove)
sudo_or_exit
case $2 in
''|containers) remove_instances ;;
images) lxc_delete_images_localy ;;
subordinate) echo; del_subordinate_ids ;;
${LXC_HOST_PREFIX}-*)
if ask_yn "Do you really want to delete conatiner $2"; then
lxc_delete_container "$2"
fi
;;
*) usage "unknown (or mising) container <name> $2"; exit 42;;
esac
;;
add)
sudo_or_exit
case $2 in
subordinate) echo; add_subordinate_ids ;;
*) usage "$_usage"; exit 42;;
esac
;;
start|stop)
sudo_or_exit
case $2 in
''|containers) lxc_cmd "$1" ;;
${LXC_HOST_PREFIX}-*)
info_msg "lxc $1 $2"
lxc "$1" "$2" | prefix_stdout "[${_BBlue}${i}${_creset}] "
;;
*) usage "ukknown or missing container <name> $2"; exit 42;;
esac
;;
show)
sudo_or_exit
case $2 in
suite) show_suite ;;
images) show_images ;;
config)
rst_title "container configurations"
echo
lxc list "$LXC_HOST_PREFIX-"
echo
lxc_cmd config show
;;
info)
rst_title "container info"
echo
lxc_cmd info
;;
*) usage "$_usage"; exit 42;;
esac
;;
__show)
case $2 in
suite) lxc_suite_info ;;
esac
;;
cmd)
sudo_or_exit
shift
case $1 in
--)
shift
for name in "${CONTAINERS[@]}"; do
lxc_exec_cmd "${name}" "$@"
done
;;
${LXC_HOST_PREFIX}-*)
local name=$1
shift
lxc_exec_cmd "${name}" "$@"
;;
*) usage "unknown <name>: $1"; exit 42
;;
esac
;;
install)
sudo_or_exit
case $2 in
suite) install_suite ;;
*) usage "$_usage"; exit 42 ;;
esac
;;
__install)
case $2 in
suite) lxc_suite_install ;;
esac
;;
doc)
echo
echo ".. generic utils/lxc.sh documentation"
;;
-*) usage "unknown option $1"; exit 42;;
*) usage "unknown or missing command $1"; exit 42;;
esac
}
build_instances() {
rst_title "Build LXC instances"
echo
add_subordinate_ids
lxc_copy_images_localy
echo
rst_title "build containers" section
echo
lxc_init_containers
lxc_config_containers
lxc_boilerplate_containers
echo
lxc list "$LXC_HOST_PREFIX"
}
remove_instances() {
rst_title "Remove LXC instances"
rst_para "existing containers matching ${_BGreen}$LXC_HOST_PREFIX-*${_creset}"
echo
lxc list "$LXC_HOST_PREFIX-"
echo -en "\\n${_BRed}LXC containers to delete::${_creset}\\n\\n ${CONTAINERS[*]}\\n" | $FMT
if ask_yn "Do you really want to delete these conatiners"; then
for i in "${CONTAINERS[@]}"; do
lxc_delete_container "$i"
done
fi
echo
lxc list "$LXC_HOST_PREFIX-"
}
# images
# ------
lxc_copy_images_localy() {
rst_title "copy images" section
echo
for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
if lxc_image_exists "local:${LXC_SUITE[i+1]}"; then
info_msg "image ${LXC_SUITE[i]} already copied --> ${LXC_SUITE[i+1]}"
else
info_msg "copy image locally ${LXC_SUITE[i]} --> ${LXC_SUITE[i+1]}"
lxc image copy "${LXC_SUITE[i]}" local: \
--alias "${LXC_SUITE[i+1]}" | prefix_stdout
fi
done
# lxc image list local: && wait_key
}
lxc_delete_images_localy() {
rst_title "Delete LXC images"
rst_para "local existing images"
echo
lxc image list local:
echo -en "\\n${_BRed}LXC images to delete::${_creset}\\n\\n ${LOCAL_IMAGES[*]}\\n"
if ask_yn "Do you really want to delete these images"; then
for i in "${LOCAL_IMAGES[@]}"; do
lxc_delete_local_image "$i"
done
fi
echo
lxc image list local:
}
show_images(){
rst_title "local images"
echo
lxc image list local:
echo -en "\\n${_Green}LXC suite images::${_creset}\\n\\n ${LOCAL_IMAGES[*]}\\n"
wait_key
for i in "${LOCAL_IMAGES[@]}"; do
if lxc_image_exists "$i"; then
info_msg "lxc image info ${_BBlue}${i}${_creset}"
lxc image info "$i" | prefix_stdout "[${_BBlue}${i}${_creset}] "
else
warn_msg "image ${_BBlue}$i${_creset} does not yet exists"
fi
done
}
# container
# ---------
show_suite(){
rst_title "LXC suite ($LXC_HOST_PREFIX-*)"
echo
lxc list "$LXC_HOST_PREFIX-"
echo
for i in "${CONTAINERS[@]}"; do
if ! lxc_exists "$i"; then
warn_msg "container ${_BBlue}$i${_creset} does not yet exists"
else
lxc exec -t "${i}" -- "${LXC_REPO_ROOT}/utils/lxc.sh" __show suite \
| prefix_stdout "[${_BBlue}${i}${_creset}] "
fi
done
}
install_suite() {
for i in "${CONTAINERS[@]}"; do
if ! lxc_exists "$i"; then
warn_msg "container ${_BBlue}$i${_creset} does not yet exists"
else
info_msg "[${_BBlue}${i}${_creset}] ${_BGreen}${LXC_REPO_ROOT}/utils/lxc.sh install suite${_creset}"
lxc exec -t "${i}" -- "${LXC_REPO_ROOT}/utils/lxc.sh" __install suite \
| prefix_stdout "[${_BBlue}${i}${_creset}] "
fi
done
}
lxc_cmd() {
for i in "${CONTAINERS[@]}"; do
if ! lxc_exists "$i"; then
warn_msg "container ${_BBlue}$i${_creset} does not yet exists"
else
info_msg "lxc $* $i"
lxc "$@" "$i" | prefix_stdout "[${_BBlue}${i}${_creset}] "
echo
fi
done
}
lxc_exec_cmd() {
local name="$1"
shift
exit_val=
info_msg "[${_BBlue}${name}${_creset}] ${_BGreen}${*}${_creset}"
lxc exec "${name}" -- "$@"
exit_val=$?
if [[ $exit_val -ne 0 ]]; then
warn_msg "[${_BBlue}${i}${_creset}] exit code (${_BRed}${exit_val}${_creset}) from ${_BGreen}${*}${_creset}"
else
info_msg "[${_BBlue}${i}${_creset}] exit code (${exit_val}) from ${_BGreen}${*}${_creset}"
fi
echo
}
lxc_init_containers() {
local image_name
local container_name
for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
image_name="${LXC_SUITE[i+1]}"
container_name="${LXC_HOST_PREFIX}-${image_name}"
if lxc info "${container_name}" &>/dev/null; then
info_msg "container '${container_name}' already exists"
else
info_msg "create conatiner instance: ${container_name}"
lxc init "local:${image_name}" "${container_name}"
fi
done
}
lxc_config_containers() {
for i in "${CONTAINERS[@]}"; do
info_msg "[${_BBlue}${i}${_creset}] configure container ..."
info_msg "[${_BBlue}${i}${_creset}] map uid/gid from host to container"
# https://lxd.readthedocs.io/en/latest/userns-idmap/#custom-idmaps
echo -e -n "uid $HOST_USER_ID 1000\\ngid $HOST_GROUP_ID 1000"\
| lxc config set "$i" raw.idmap -
info_msg "[${_BBlue}${i}${_creset}] share ${REPO_ROOT} (repo_share) from HOST into container"
# https://lxd.readthedocs.io/en/latest/instances/#type-disk
lxc config device add "$i" repo_share disk \
source="${REPO_ROOT}" \
path="${LXC_REPO_ROOT}" &>/dev/null
# lxc config show "$i" && wait_key
done
}
lxc_boilerplate_containers() {
local image_name
local container_name
local boilerplate_script
for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
image_name="${LXC_SUITE[i+1]}"
container_name="${LXC_HOST_PREFIX}-${image_name}"
boilerplate_script="${image_name}_boilerplate"
boilerplate_script="${!boilerplate_script}"
info_msg "[${_BBlue}${container_name}${_creset}] install boilerplate"
if lxc start -q "${container_name}" &>/dev/null; then
sleep 5 # guest needs some time to come up and get an IP
fi
if [[ -n "${boilerplate_script}" ]]; then
echo "${boilerplate_script}" \
| lxc exec "${container_name}" -- bash \
| prefix_stdout "[${_BBlue}${container_name}${_creset}] "
else
err_msg "[${_BBlue}${container_name}${_creset}] no boilerplate for image '${image_name}'"
fi
done
}
# subordinates
# ------------
#
# see man: subgid(5), subuid(5), https://lxd.readthedocs.io/en/latest/userns-idmap
#
# E.g. in the HOST you have uid=1001(user) and/or gid=1001(user) ::
#
# root:1001:1
#
# in the CONTAINER::
#
# config:
# raw.idmap: |
# uid 1001 1000
# gid 1001 1000
add_subordinate_ids() {
if grep "root:${HOST_USER_ID}:1" /etc/subuid -qs; then
info_msg "lxd already has permission to map ${HOST_USER_ID}'s user/group id through"
else
info_msg "add lxd permission to map ${HOST_USER_ID}'s user/group id through"
usermod --add-subuids "${HOST_USER_ID}-${HOST_USER_ID}" \
--add-subgids "${HOST_GROUP_ID}-${HOST_GROUP_ID}" root
fi
}
del_subordinate_ids() {
local out
local exit_val
if grep "root:${HOST_USER_ID}:1" /etc/subuid -qs; then
# TODO: root user is always in use by process 1, how can we remove subordinates?
info_msg "remove lxd permission to map ${HOST_USER_ID}'s user/group id through"
out=$(usermod --del-subuids "${HOST_USER_ID}-${HOST_USER_ID}" --del-subgids "${HOST_GROUP_ID}-${HOST_GROUP_ID}" root 2>&1)
exit_val=$?
if [ $exit_val -ne 0 ]; then
err_msg "$out"
fi
else
info_msg "lxd does not have permission to map ${HOST_USER_ID}'s user/group id through"
fi
}
# ----------------------------------------------------------------------------
main "$@"
# ----------------------------------------------------------------------------
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