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searxng/utils/lxc.sh
Alexandre Flament 76cbfbbdda reference docs.searxng.org
2022-01-02 21:18:29 +01:00

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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
# shellcheck source=utils/brand.env
source "${REPO_ROOT}/utils/brand.env"
# load environment of the LXC suite
LXC_ENV="${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="${LXC_HOST_PREFIX:-test}"
# Location in the container where all folders from HOST are mounted
LXC_SHARE_FOLDER="/share"
LXC_REPO_ROOT="${LXC_SHARE_FOLDER}/$(basename "${REPO_ROOT}")"
ubu1804_boilerplate="
export DEBIAN_FRONTEND=noninteractive
apt-get update -y
apt-get upgrade -y
apt-get install -y git curl wget
"
ubu1904_boilerplate="$ubu1804_boilerplate"
# shellcheck disable=SC2034
ubu2004_boilerplate="
$ubu1904_boilerplate
echo 'Set disable_coredump false' >> /etc/sudo.conf
"
# shellcheck disable=SC2034
ubu2010_boilerplate="$ubu1904_boilerplate"
# shellcheck disable=SC2034
archlinux_boilerplate="
pacman --noprogressbar -Syu --noconfirm
pacman --noprogressbar -S --noconfirm inetutils git curl wget sudo
echo 'Set disable_coredump false' >> /etc/sudo.conf
"
# shellcheck disable=SC2034
fedora33_boilerplate="
dnf update -y
dnf install -y git curl wget hostname
echo 'Set disable_coredump false' >> /etc/sudo.conf
"
# shellcheck disable=SC2034
centos7_boilerplate="
yum update -y
yum install -y git curl wget hostname sudo which
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|<name>]
$_cmd copy [images]
$_cmd remove [containers|<name>|images]
$_cmd [start|stop] [containers|<name>]
$_cmd show [images|suite|info|config [<name>]]
$_cmd cmd [--|<name>] '...'
$_cmd install [suite|base [<name>]]
build
:containers: build, launch all containers and 'install base' packages
:<name>: build, launch container <name> and 'install base' packages
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
start/stop
:containers: start/stop all 'containers' from the suite
:<name>: start/stop container <name> from suite
show
:info: show info of all (or <name>) containers from LXC suite
:config: show config of all (or <name>) containers from the LXC suite
:suite: show services of all (or <name>) containers from the LXC suite
:images: show information of local images
cmd
use single qoutes to evaluate in container's bash, e.g.: 'echo \$(hostname)'
-- run command '...' in all containers of the LXC suite
:<name>: run command '...' in container <name>
install
:base: prepare LXC; install basic packages
:suite: install LXC ${LXC_SUITE_NAME} suite into all (or <name>) containers
EOF
usage_containers
[ -n "${1+x}" ] && err_msg "$1"
}
usage_containers() {
lxc_suite_install_info
[ -n "${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 == __* ]] && [[ ! $1 == --help ]]; then
if ! in_container; then
! required_commands lxc && lxd_info && exit 42
fi
[[ -z $LXC_SUITE ]] && err_msg "missing LXC_SUITE" && exit 42
fi
case $1 in
--getenv) var="$2"; echo "${!var}"; exit 0;;
-h|--help) usage; exit 0;;
build)
sudo_or_exit
case $2 in
${LXC_HOST_PREFIX}-*) build_container "$2" ;;
''|--|containers) build_all_containers ;;
*) usage "$_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_containers ;;
images) lxc_delete_images_localy ;;
${LXC_HOST_PREFIX}-*)
! lxc_exists "$2" && warn_msg "container not yet exists: $2" && exit 0
if ask_yn "Do you really want to delete container $2"; then
lxc_delete_container "$2"
fi
;;
*) usage "uknown or missing container <name> $2"; exit 42;;
esac
;;
start|stop)
sudo_or_exit
case $2 in
''|--|containers) lxc_cmd "$1" ;;
${LXC_HOST_PREFIX}-*)
! lxc_exists "$2" && usage_containers "unknown container: $2" && exit 42
info_msg "lxc $1 $2"
lxc "$1" "$2" | prefix_stdout "[${_BBlue}${i}${_creset}] "
;;
*) usage "uknown or missing container <name> $2"; exit 42;;
esac
;;
show)
sudo_or_exit
case $2 in
suite)
case $3 in
${LXC_HOST_PREFIX}-*)
lxc exec -t "$3" -- "${LXC_REPO_ROOT}/utils/lxc.sh" __show suite \
| prefix_stdout "[${_BBlue}$3${_creset}] "
;;
*) show_suite;;
esac
;;
images) show_images ;;
config)
case $3 in
${LXC_HOST_PREFIX}-*)
! lxc_exists "$3" && usage_containers "unknown container: $3" && exit 42
lxc config show "$3" | prefix_stdout "[${_BBlue}${3}${_creset}] "
;;
*)
rst_title "container configurations"
echo
lxc list "$LXC_HOST_PREFIX-"
echo
lxc_cmd config show
;;
esac
;;
info)
case $3 in
${LXC_HOST_PREFIX}-*)
! lxc_exists "$3" && usage_containers "unknown container: $3" && exit 42
lxc info "$3" | prefix_stdout "[${_BBlue}${3}${_creset}] "
;;
*)
rst_title "container info"
echo
lxc_cmd info
;;
esac
;;
*) usage "$_usage"; exit 42;;
esac
;;
__show)
# wrapped show commands, called once in each container
case $2 in
suite) lxc_suite_info ;;
esac
;;
cmd)
sudo_or_exit
shift
case $1 in
--) shift; lxc_exec "$@" ;;
${LXC_HOST_PREFIX}-*)
! lxc_exists "$1" && usage_containers "unknown container: $1" && exit 42
local name=$1
shift
lxc_exec_cmd "${name}" "$@"
;;
*) usage_containers "unknown container: $1" && exit 42
esac
;;
install)
sudo_or_exit
case $2 in
suite|base)
case $3 in
${LXC_HOST_PREFIX}-*)
! lxc_exists "$3" && usage_containers "unknown container: $3" && exit 42
lxc_exec_cmd "$3" "${LXC_REPO_ROOT}/utils/lxc.sh" __install "$2"
;;
''|--) lxc_exec "${LXC_REPO_ROOT}/utils/lxc.sh" __install "$2" ;;
*) usage_containers "unknown container: $3" && exit 42
esac
;;
*) usage "$_usage"; exit 42 ;;
esac
;;
__install)
# wrapped install commands, called once in each container
# shellcheck disable=SC2119
case $2 in
suite) lxc_suite_install ;;
base) FORCE_TIMEOUT=0 lxc_install_base_packages ;;
esac
;;
doc)
echo
echo ".. generic utils/lxc.sh documentation"
;;
-*) usage "unknown option $1"; exit 42;;
*) usage "unknown or missing command $1"; exit 42;;
esac
}
build_all_containers() {
rst_title "Build all LXC containers of suite"
echo
usage_containers
lxc_copy_images_localy
lxc_init_all_containers
lxc_config_all_containers
lxc_boilerplate_all_containers
rst_title "install LXC base packages" section
echo
lxc_exec "${LXC_REPO_ROOT}/utils/lxc.sh" __install base
echo
lxc list "$LXC_HOST_PREFIX"
}
build_container() {
rst_title "Build container $1"
local remote_image
local container
local image
local boilerplate_script
for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
if [ "${LXC_HOST_PREFIX}-${LXC_SUITE[i+1]}" = "$1" ]; then
remote_image="${LXC_SUITE[i]}"
container="${LXC_HOST_PREFIX}-${LXC_SUITE[i+1]}"
image="${LXC_SUITE[i+1]}"
boilerplate_script="${image}_boilerplate"
boilerplate_script="${!boilerplate_script}"
break
fi
done
echo
if [ -z "$container" ]; then
err_msg "container $1 unknown"
usage_containers
return 42
fi
lxc_image_copy "${remote_image}" "${image}"
rst_title "init container" section
lxc_init_container "${image}" "${container}"
rst_title "configure container" section
lxc_config_container "${container}"
rst_title "run LXC boilerplate scripts" section
lxc_install_boilerplate "${container}" "$boilerplate_script"
echo
rst_title "install LXC base packages" section
lxc_exec_cmd "${container}" "${LXC_REPO_ROOT}/utils/lxc.sh" __install base \
| prefix_stdout "[${_BBlue}${container}${_creset}] "
echo
lxc list "$container"
}
remove_containers() {
rst_title "Remove all LXC containers of suite"
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
local default=Ny
[[ $FORCE_TIMEOUT = 0 ]] && default=Yn
if ask_yn "Do you really want to delete these containers" $default; then
for i in "${CONTAINERS[@]}"; do
lxc_delete_container "$i"
done
fi
echo
lxc list "$LXC_HOST_PREFIX-"
}
# images
# ------
lxc_copy_images_localy() {
rst_title "copy images" section
for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
lxc_image_copy "${LXC_SUITE[i]}" "${LXC_SUITE[i+1]}"
done
# lxc image list local: && wait_key
}
lxc_delete_images_localy() {
rst_title "Delete LXC images"
rst_para "local existing images"
echo
lxc image list local:
echo -en "\\n${_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
for i in $(lxc image list --format csv | grep '^,' | sed 's/,\([^,]*\).*$/\1/'); do
if ask_yn "Image $i has no alias, do you want to delete the image?" Yn; then
lxc_delete_local_image "$i"
fi
done
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}] "
echo
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}] "
fi
done
}
lxc_exec_cmd() {
local name="$1"
shift
exit_val=
info_msg "[${_BBlue}${name}${_creset}] ${_BGreen}${*}${_creset}"
lxc exec -t --cwd "${LXC_REPO_ROOT}" "${name}" -- bash -c "$*"
exit_val=$?
if [[ $exit_val -ne 0 ]]; then
warn_msg "[${_BBlue}${name}${_creset}] exit code (${_BRed}${exit_val}${_creset}) from ${_BGreen}${*}${_creset}"
else
info_msg "[${_BBlue}${name}${_creset}] exit code (${exit_val}) from ${_BGreen}${*}${_creset}"
fi
}
lxc_exec() {
for i in "${CONTAINERS[@]}"; do
if ! lxc_exists "$i"; then
warn_msg "container ${_BBlue}$i${_creset} does not yet exists"
else
lxc_exec_cmd "${i}" "$@" | prefix_stdout "[${_BBlue}${i}${_creset}] "
fi
done
}
lxc_init_all_containers() {
rst_title "init all containers" section
local image_name
local container_name
for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
lxc_init_container "${LXC_SUITE[i+1]}" "${LXC_HOST_PREFIX}-${LXC_SUITE[i+1]}"
done
}
lxc_config_all_containers() {
rst_title "configure all containers" section
for i in "${CONTAINERS[@]}"; do
lxc_config_container "${i}"
done
}
lxc_config_container() {
info_msg "[${_BBlue}$1${_creset}] configure container ..."
info_msg "[${_BBlue}$1${_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 0\\ngid $HOST_GROUP_ID 0"\
| lxc config set "$1" raw.idmap -
info_msg "[${_BBlue}$1${_creset}] share ${REPO_ROOT} (repo_share) from HOST into container"
# https://lxd.readthedocs.io/en/latest/instances/#type-disk
lxc config device add "$1" repo_share disk \
source="${REPO_ROOT}" \
path="${LXC_REPO_ROOT}" &>/dev/null
# lxc config show "$1" && wait_key
}
lxc_boilerplate_all_containers() {
rst_title "run LXC boilerplate scripts" section
local boilerplate_script
local image_name
for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
image_name="${LXC_SUITE[i+1]}"
boilerplate_script="${image_name}_boilerplate"
boilerplate_script="${!boilerplate_script}"
lxc_install_boilerplate "${LXC_HOST_PREFIX}-${image_name}" "$boilerplate_script"
if [[ -z "${boilerplate_script}" ]]; then
err_msg "[${_BBlue}${container_name}${_creset}] no boilerplate for image '${image_name}'"
fi
done
}
lxc_install_boilerplate() {
# usage: lxc_install_boilerplate <container-name> <string: shell commands ..>
#
# usage: lxc_install_boilerplate searx-archlinux "${archlinux_boilerplate}"
local container_name="$1"
local boilerplate_script="$2"
info_msg "[${_BBlue}${container_name}${_creset}] init .."
if lxc start -q "${container_name}" &>/dev/null; then
sleep 5 # guest needs some time to come up and get an IP
fi
if ! check_connectivity "${container_name}"; then
die 42 "Container ${container_name} has no internet connectivity!"
fi
lxc_init_container_env "${container_name}"
info_msg "[${_BBlue}${container_name}${_creset}] install /.lxcenv.mk .."
cat <<EOF | lxc exec "${container_name}" -- bash | prefix_stdout "[${_BBlue}${container_name}${_creset}] "
rm -f "/.lxcenv.mk"
ln -s "${LXC_REPO_ROOT}/utils/makefile.lxc" "/.lxcenv.mk"
ls -l "/.lxcenv.mk"
EOF
info_msg "[${_BBlue}${container_name}${_creset}] run LXC boilerplate scripts .."
if lxc start -q "${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}] "
fi
}
check_connectivity() {
local ret_val=0
info_msg "check internet connectivity ..."
if ! lxc exec "${1}" -- ping -c 1 8.8.8.8 &>/dev/null; then
ret_val=1
err_msg "no internet connectivity!"
info_msg "Most often the connectivity is blocked by a docker installation:"
info_msg "Whenever docker is started (reboot) it sets the iptables policy "
info_msg "for the FORWARD chain to DROP, see:"
info_msg " https://docs.searxng.org/utils/lxc.sh.html#internet-connectivity-docker"
iptables-save | grep ":FORWARD"
fi
return $ret_val
}
# ----------------------------------------------------------------------------
main "$@"
# ----------------------------------------------------------------------------
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