LXC: tooling box - add HOST shares and commandline to containers (WIP)
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser
parent
e6bf2038c3
commit
0b2b325552
152
utils/lxc.sh
152
utils/lxc.sh
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@ -9,6 +9,9 @@ source_dot_config
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# ----------------------------------------------------------------------------
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# config
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# ----------------------------------------------------------------------------
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#
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# read also:
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# - https://lxd.readthedocs.io/en/latest/
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# name of https://images.linuxcontainers.org
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LINUXCONTAINERS_ORG_NAME="${LINUXCONTAINERS_ORG_NAME:-images}"
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@ -17,10 +20,11 @@ HOST_PREFIX="${HOST_PREFIX:-searx}"
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TEST_IMAGES=(
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"$LINUXCONTAINERS_ORG_NAME:ubuntu/18.04" "ubu1804"
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"$LINUXCONTAINERS_ORG_NAME:ubuntu/19.04" "ubu1904"
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"$LINUXCONTAINERS_ORG_NAME:archlinux" "archlinux"
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# TODO: installation of searx & filtron not yet implemented ..
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#
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#"$LINUXCONTAINERS_ORG_NAME:archlinux" "archlinux"
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#"$LINUXCONTAINERS_ORG_NAME:fedora/31" "fedora31"
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#"ubuntu-minimal:18.04" "ubu1804"
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#"ubuntu-minimal:19.10" "ubu1910"
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)
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REMOTE_IMAGES=()
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@ -31,6 +35,10 @@ for ((i=0; i<${#TEST_IMAGES[@]}; i+=2)); do
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LOCAL_IMAGES=("${LOCAL_IMAGES[@]}" "${TEST_IMAGES[i+1]}")
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done
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HOST_USER="${SUDO_USER:-$USER}"
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HOST_USER_ID=$(id -u "${HOST_USER}")
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HOST_GROUP_ID=$(id -g "${HOST_USER}")
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# ----------------------------------------------------------------------------
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usage() {
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# ----------------------------------------------------------------------------
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@ -39,13 +47,25 @@ usage() {
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usage::
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$(basename "$0") build [hosts]
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$(basename "$0") delete [hosts]
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$(basename "$0") build [containers]
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$(basename "$0") delete [containers|subordinate]
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$(basename "$0") [start|stop] [containers]
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$(basename "$0") inspect [info|config]
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$(basename "$0") cmd ...
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build / delete
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build and/or delete all LXC hosts
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:containers: build and delete all LXC containers
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add / delete
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:subordinate: lxd permission to map ${HOST_USER}'s user/group id through
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start/stop
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:containers: start/stop of all containers
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inspect
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:info: show info of all containers
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:config: show config of all containers
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cmd ...
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run commandline ... in all containers
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all LXC hosts:
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all LXC containers:
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${LOCAL_IMAGES[@]}
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EOF
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@ -53,7 +73,6 @@ EOF
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}
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main() {
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rst_title "LXC tooling box" part
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required_commands lxc || exit
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@ -66,15 +85,43 @@ main() {
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build)
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sudo_or_exit
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case $2 in
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hosts) build_instances ;;
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containers) build_instances ;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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delete)
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sudo_or_exit
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case $2 in
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hosts) delete_instances ;;
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containers) delete_instances ;;
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subordinate) echo; del_subordinate_ids ;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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add)
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sudo_or_exit
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case $2 in
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subordinate) echo; add_subordinate_ids ;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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start|stop)
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sudo_or_exit
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case $2 in
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containers) lxc_cmd "$1" ;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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inspect)
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sudo_or_exit
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case $2 in
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config) lxc_cmd config show;;
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info) lxc_cmd info;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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cmd)
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sudo_or_exit
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shift
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for i in "${LOCAL_IMAGES[@]}"; do
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info_msg "lxc exec ${_BBlue}${HOST_PREFIX}-${i}${_creset} -- ${_BGreen}${*}${_creset}"
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lxc exec "${HOST_PREFIX}-${i}" -- "$@"
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done
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;;
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*)
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usage "unknown or missing command $1"; exit 42;;
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esac
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@ -83,19 +130,25 @@ main() {
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build_instances() {
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rst_title "Build LXC instances"
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lxc_copy_images_localy
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#lxc image list local: && wait_key
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lxc_init_containers
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err_msg "WIP / sorry, not implemented yet :o"
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lxc_config_containers
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lxc list "$HOST_PREFIX"
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}
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delete_instances() {
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rst_title "Delete LXC instances"
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echo -en "\\nLXC hosts(s)::\\n\\n ${LOCAL_IMAGES[*]}\\n" | $FMT
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echo -en "\\nLXC containers(s)::\\n\\n ${LOCAL_IMAGES[*]}\\n" | $FMT
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if ask_yn "Do you really want to delete all images"; then
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lxc_delete_containers
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fi
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# lxc list "$HOST_PREFIX"
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# lxc image list local: && wait_key
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}
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# images
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# ------
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lxc_copy_images_localy() {
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echo
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for ((i=0; i<${#TEST_IMAGES[@]}; i+=2)); do
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@ -107,7 +160,6 @@ lxc_copy_images_localy() {
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--alias "${TEST_IMAGES[i+1]}" prefix_stdout
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fi
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done
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#lxc image list local:
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}
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lxc_delete_images_localy() {
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@ -119,6 +171,17 @@ lxc_delete_images_localy() {
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#lxc image list local:
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}
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# container
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# ---------
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lxc_cmd() {
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echo
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for i in "${LOCAL_IMAGES[@]}"; do
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info_msg "lxc $* $HOST_PREFIX-$i"
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lxc "$@" "$HOST_PREFIX-$i"
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done
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}
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lxc_init_containers() {
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echo
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for i in "${LOCAL_IMAGES[@]}"; do
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@ -129,7 +192,25 @@ lxc_init_containers() {
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lxc init "local:$i" "$HOST_PREFIX-$i"
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fi
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done
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#lxc list "$HOST_PREFIX"
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}
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lxc_config_containers() {
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echo
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for i in "${LOCAL_IMAGES[@]}"; do
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info_msg "map uid/gid from host to conatiner: $HOST_PREFIX-$i"
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# https://lxd.readthedocs.io/en/latest/userns-idmap/#custom-idmaps
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echo -e -n "uid $HOST_USER_ID 1000\\ngid $HOST_GROUP_ID 1000"\
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| lxc config set "$HOST_PREFIX-$i" raw.idmap -
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info_msg "share ${REPO_ROOT} (repo_share) from HOST into container: $HOST_PREFIX-$i"
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# https://lxd.readthedocs.io/en/latest/instances/#type-disk
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lxc config device add "$HOST_PREFIX-$i" repo_share disk \
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source="${REPO_ROOT}" \
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path="/share/$(basename "${REPO_ROOT}")"
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# lxc config show "$HOST_PREFIX-$i" && wait_key
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done
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}
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lxc_delete_containers() {
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@ -143,7 +224,46 @@ lxc_delete_containers() {
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warn_msg "instance '$HOST_PREFIX-$i' does not exist / can't delete :o"
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fi
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done
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#lxc list "$HOST_PREFIX"
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}
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# subordinates
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# ------------
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#
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# see man: subgid(5), subuid(5), https://lxd.readthedocs.io/en/latest/userns-idmap
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#
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# E.g. in the HOST you have uid=1001(user) and/or gid=1001(user) ::
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#
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# root:1001:1
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#
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# in the CONTAINER::
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#
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# config:
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# raw.idmap: |
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# uid 1001 1000
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# gid 1001 1000
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add_subordinate_ids() {
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if grep "root:${HOST_USER_ID}:1" /etc/subuid -qs; then
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info_msg "lxd already has permission to map ${HOST_USER_ID}'s user/group id through"
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else
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info_msg "add lxd permission to map ${HOST_USER_ID}'s user/group id through"
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usermod --add-subuids "${HOST_USER_ID}-${HOST_USER_ID}" \
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--add-subgids "${HOST_GROUP_ID}-${HOST_GROUP_ID}" root
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fi
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}
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del_subordinate_ids() {
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local out
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if grep "root:${HOST_USER_ID}:1" /etc/subuid -qs; then
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# TODO: root user is always in use by process 1, how can we remove subordinates?
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info_msg "remove lxd permission to map ${HOST_USER_ID}'s user/group id through"
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out=$(usermod --del-subuids "${HOST_USER_ID}-${HOST_USER_ID}" --del-subgids "${HOST_GROUP_ID}-${HOST_GROUP_ID}" root 2>&1)
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if [ ! -z $? ]; then
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err_msg "$out"
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fi
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else
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info_msg "lxd does not have permission to map ${HOST_USER_ID}'s user/group id through"
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fi
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}
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