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LXC: fixed raw.idmap & removed obsolete uid/gid subordinate
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser
parent
e7f69b63f1
commit
d48c7bf678
67
utils/lxc.sh
67
utils/lxc.sh
@ -78,11 +78,10 @@ usage::
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$_cmd build [containers]
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$_cmd copy [images]
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$_cmd remove [containers|<name>|images|subordinate]
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$_cmd add [subordinate]
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$_cmd remove [containers|<name>|images]
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$_cmd [start|stop] [containers|<name>]
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$_cmd show [info|config|suite|images]
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$_cmd cmd [--|<name>] ...
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$_cmd cmd [--|<name>] '...'
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$_cmd install [suite]
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build
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@ -92,8 +91,6 @@ copy:
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remove
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:containers: delete all 'containers' or only <container-name>
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:images: delete local images of the suite
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add / remove
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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 all 'containers' from the suite
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:<name>: start/stop conatiner <name> from suite
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@ -103,8 +100,9 @@ show
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:suite: show services of all the containers from the LXC suite
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:images: show information of local images
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cmd
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-- run command ... in all containers of the LXC suite
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:<name>: run command ... in container <name>
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use single qoutes to evaluate in container's bash, e.g. 'echo $(hostname)'
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-- run command '...' in all containers of the LXC suite
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:<name>: run command '...' in container <name>
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install
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:suite: install LXC suite, includes morty & filtron
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@ -176,7 +174,6 @@ main() {
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case $2 in
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''|containers) remove_instances ;;
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images) lxc_delete_images_localy ;;
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subordinate) echo; del_subordinate_ids ;;
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${LXC_HOST_PREFIX}-*)
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! lxc_exists "$2" && usage_containers "unknown container: $2" && exit 42
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if ask_yn "Do you really want to delete conatiner $2"; then
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@ -186,13 +183,6 @@ main() {
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*) usage "uknown or missing container <name> $2"; exit 42;;
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esac
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;;
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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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;;
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start|stop)
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sudo_or_exit
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case $2 in
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@ -274,7 +264,6 @@ main() {
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build_instances() {
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rst_title "Build LXC instances"
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echo
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add_subordinate_ids
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lxc_copy_images_localy
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echo
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rst_title "build containers" section
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@ -400,7 +389,7 @@ lxc_exec_cmd() {
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shift
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exit_val=
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info_msg "[${_BBlue}${name}${_creset}] ${_BGreen}${*}${_creset}"
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lxc exec --cwd "${LXC_REPO_ROOT}" "${name}" -- "$@"
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lxc exec --cwd "${LXC_REPO_ROOT}" "${name}" -- bash -c "$*"
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exit_val=$?
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if [[ $exit_val -ne 0 ]]; then
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warn_msg "[${_BBlue}${name}${_creset}] exit code (${_BRed}${exit_val}${_creset}) from ${_BGreen}${*}${_creset}"
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@ -435,7 +424,7 @@ lxc_config_containers() {
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info_msg "[${_BBlue}${i}${_creset}] map uid/gid from host to container"
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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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echo -e -n "uid $HOST_USER_ID 0\\ngid $HOST_GROUP_ID 0"\
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| lxc config set "$i" raw.idmap -
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info_msg "[${_BBlue}${i}${_creset}] share ${REPO_ROOT} (repo_share) from HOST into container"
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@ -475,48 +464,6 @@ lxc_boilerplate_containers() {
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done
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}
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# subordinates
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# ------------
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#
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# see man: subgid(5), subuid(5), https://lxd.readthedocs.io/en/latest/userns-idmap
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#
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# E.g. in the HOST you have uid=1001(user) and/or gid=1001(user) ::
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#
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# root:1001:1
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#
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# in the CONTAINER::
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#
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# config:
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# raw.idmap: |
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# uid 1001 1000
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# gid 1001 1000
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add_subordinate_ids() {
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if grep "root:${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}-${HOST_GROUP_ID}" root
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fi
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}
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del_subordinate_ids() {
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local out
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local exit_val
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if grep "root:${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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exit_val=$?
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if [ $exit_val -ne 0 ]; then
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err_msg "$out"
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fi
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else
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info_msg "lxd does not have permission to map ${HOST_USER_ID}'s user/group id through"
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fi
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}
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# ----------------------------------------------------------------------------
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main "$@"
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