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#!/bin/bash
## required vars
# TMPDIR=/tmp/virt/<CURRENT_USER>/<PID>/
# USER_CONTAINER_CONFIG
# NETSHARE_DIR
# vars
BIND_MOUNT_FILE="$CONFDIR/container_meta.json"
# TODO: Maybe make this an array to support spaces
BIND_MOUNT_STRING=""
VOLUME_MOUNT_INFO=""
function cleanup_container_mount()
{
for directory in "$VOLUME_MOUNT_INFO"; do
umount "$directory/dnbd3.fuse"
find $directory -delete
done
}
function prepare_container_mount()
{
local image_uuid="$BIND_MOUNT_SOURCE"
local openslx_config="/opt/openslx/config"
local data_container_dir="${CONFDIR}/${image_uuid}"
local data_container_metadata="${data_container_dir}/metadata"
local data_container_mount_info="${data_container_dir}/mount_info"
mkdir -p "$data_container_dir"
echo "MOUNT_TARGET=${BIND_MOUNT_TARGET}" > "${data_container_mount_info}"
echo "MOUNT_OPTION=${BIND_MOUNT_OPTION}" >> "${data_container_mount_info}"
# get SLX_PXE_SERVER_IP (sat ip)
source "$openslx_config"
curl --silent ${SLX_PXE_SERVER_IP}/vmchooser/lecture/${image_uuid}/imagemeta --output "$data_container_metadata"
retval=$?
[ "$retval" != "0" ] && writelog "+ request for data container metadata not successful" && return $retval
if [[ -z "$VOLUME_MOUNT_INFO" ]]; then
VOLUME_MOUNT_INFO+="${data_container_dir}"
else
VOLUME_MOUNT_INFO+=" ${data_container_dir}"
fi
}
function prepare_default_mount()
{
# USER_HOME is selected
if [[ "$BIND_MOUNT_SOURCE" == "USER_HOME" ]]; then
if [[ -d "$HOME/PERSISTENT" ]]; then
BIND_MOUNT_STRING+=" --mount type=bind,source=$HOME/PERSISTENT,target=$BIND_MOUNT_TARGET"
else
# user has no PERSISTENT, maybe this is a demo user just mount $HOME
BIND_MOUNT_STRING+=" --mount type=bind,source=$HOME,target=$BIND_MOUNT_TARGET"
fi
# If USER_TMP is used, create a locaten for client user and bind mount into container
elif [[ "$BIND_MOUNT_SOURCE" == "USER_TMP" ]]; then
# DOCKER_TMP created and cleand in opt/openslx/pam/hooks/auth-final-exec.d/30-add-to-docker.sh
DOCKER_TMP="/tmp/docker"
DOCKER_USER_TMP="$DOCKER_TMP/$(id -un)"
[ ! -e $DOCKER_USER_TMP ] && mkdir -p $DOCKER_USER_TMP && chmod 0700 $DOCKER_USER_TMP
BIND_MOUNT_STRING+=" --mount type=bind,source=$DOCKER_USER_TMP,target=$BIND_MOUNT_TARGET"
elif [[ -z "${NETSHARE_DIR[$BIND_MOUNT_SOURCE]}" ]]; then
writelog "+ no bind mount mapping for letter $BIND_MOUNT_SOURCE found!"
continue
else
BIND_MOUNT_STRING+=" --mount type=bind,\\\"source=${NETSHARE_DIR[$BIND_MOUNT_SOURCE]}\\\",target=$BIND_MOUN T_TARGET"
fi
}
BIND_MOUNT_COUNT="$( cat "$BIND_MOUNT_FILE" | jq '.bind_mount_config | length' )"
for (( index=0; index < "$BIND_MOUNT_COUNT"; index++ )); do
BIND_MOUNT_INFO="$( jq .bind_mount_config["$index"] "$BIND_MOUNT_FILE" )"
# expecting source to be a MOUNT_LETTER, wich must replaced with the directory
MOUNT_TYPE="$( jq -r .mount_type <<< "$BIND_MOUNT_INFO" )"
BIND_MOUNT_SOURCE="$( jq -r .source <<< "$BIND_MOUNT_INFO" )"
BIND_MOUNT_TARGET="$( jq -r .target <<< "$BIND_MOUNT_INFO" )"
BIND_MOUNT_OPTION="$( jq -r .options <<< "$BIND_MOUNT_INFO" )"
if [[ -z "$BIND_MOUNT_SOURCE" || -z "$BIND_MOUNT_TARGET" ]]; then
writelog "+ no proper bind mount option provided!"
continue
fi
if [[ -z "$MOUNT_TYPE" || "$MOUNT_TYPE" == "DEFAULT" ]]; then
writelog "+ prepare bind mount option with SOURCE=$BIND_MOUNT_SOURCE (label) and target=$BIND_MOUNT_TARGET"
prepare_default_mount
continue
elif [[ "$MOUNT_TYPE" == "CONTAINER_IMAGE" ]]; then
writelog "+ prepare docker volume"
prepare_container_mount
fi
if [[ -n "$VOLUME_MOUNT_INFO" ]]; then
add_cleanup cleanup_gio_mount
fi
done
if [[ -n "${BIND_MOUNT_STRING}" ]]; then
writelog "+ write final CONTAINER_BIND_MOUNT_STRING ${BIND_MOUNT_STRING} in config ${USER_CONTAINER_CONFIG}"
echo "CONTAINER_BIND_MOUNT_STRING=\"${BIND_MOUNT_STRING}\"" >> ${USER_CONTAINER_CONFIG}
fi
if [[ -n "${VOLUME_MOUNT_INFO}" ]]; then
writelog "+ write VOLUME_MOUNT_INFO=${VOLUME_MOUNT_INFO} in config"
echo "VOLUME_MOUNT_INFO=\"${VOLUME_MOUNT_INFO}\"" >> ${USER_CONTAINER_CONFIG}
fi
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