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#!/bin/bash
########################################################
# Include: Detect, whether runvirt runs in legacy mode #
########################################################
## Functions ##
# Legacy mode: As runvirt has been before.
# New mode: uuid in xml _and_ vmx given via http.
download_metadata() {
local EXTRA_ERROR=
local DOWNLOADED_VMX="$CONFDIR/vmx"
declare -rg TMPCONFIG="$CONFDIR/vmx_modified"
# Run hooks
if run_hooks "download" "$CONFDIR"; then
writelog "Metadata download handled via hook."
else
# No hooks found
writelog "Downloading metadata via default method."
download_metadata_default
fi
if ! [ -s "$DOWNLOADED_VMX" ]; then
# Seems we are in legacy mode, which is no longer supported. Warn user and exit
EXIT_TYPE="user" EXIT_REASON="msg.vm.no-metadata
Die Metadaten der Lehrumgebung konnten nicht vom bwLehrpool-Satelliten
heruntergeladen werden, oder sind leer. Bitte versuchen Sie es in wenigen Minuten erneut
und wenden Sie sich an den Support, wenn das Problem bestehen bleibt.
$EXTRA_ERROR" cleanexit 1
fi
if ! cp "$DOWNLOADED_VMX" "$TMPCONFIG"; then
EXIT_TYPE="user" EXIT_REASON="msg.vm.copy-metadata
Die Metadaten der Lehrumgebung konnten nicht umkopiert werden.
Wenden Sie sich an den Support, wenn das Problem bestehen bleibt.
$EXTRA_ERROR" cleanexit 1
fi
if [ -s "$CONFDIR/config.inc" ]; then
$( safesource "$CONFDIR/config.inc" )
notempty DMSD_IMAGE_PATH && SRC_IMG_RELATIVE="$DMSD_IMAGE_PATH"
fi
# Validate metadata from XML, now that it has potentially been augmented
readonly SRC_IMG_RELATIVE
if isempty SRC_IMG_ABSOLUTE SRC_IMG_RELATIVE; then
writelog "Error parsing XML: Neither relative nor absolute path for image found!"
EXIT_TYPE="user" EXIT_REASON="Konnte keinen Pfad zur ausgewählten virtuellen Maschine ermitteln!" cleanexit 1
fi
if isempty SRC_IMG_ABSOLUTE && notempty VMSTORE_PATH; then
SRC_IMG_ABSOLUTE="${VMSTORE_PATH}/${SRC_IMG_RELATIVE}"
fi
readonly SRC_IMG_ABSOLUTE
declare -rg IMG_BASENAME=$(basename "$SRC_IMG_ABSOLUTE")
notempty VM_DISPLAYNAME || VM_DISPLAYNAME="${IMG_BASENAME}"
readonly VM_DISPLAYNAME
# Define VM_CLEANNAME since VM_DISPLAYNAME can be long and contain weird characters
declare -rg VM_CLEANNAME=$(echo "${VM_DISPLAYNAME:0:32}" | sed -r 's/[^0-9a-zA-Z_\-\.]+/_/g')
#
return 0
}
download_metadata_default() {
local TRIES WLOG TMPFILE RET ERRCODE CMDLINE
local cow_token argx
# Sanity checks
if ! check_dep curl; then
writelog "Could not find 'curl' in PATH: $PATH"
EXIT_TYPE="internal" EXIT_REASON="Fehlendes Dienstprogramm 'curl'!" cleanexit 1
fi
# Admin-mode (Edit-Mode)
argx=
if is_on "$VMCHOOSER_ADMIN_MODE"; then
cow_token=$( cat "/run/user/$( id -u )/cow-token" )
if isempty cow_token; then
writelog "No cow token found in edit mode"
EXIT_TYPE=user EXIT_REASON="Admin-Modus aktiviert, aber kein cow-token vorgefunden." cleanexit 1
fi
argx="?cow-user=$cow_token"
fi
# Try new unified .tar.gz way
TMPFILE="$TMPDIR/metadata.tgz"
WLOG="$TMPDIR/curl-metadata.log"
CMDLINE=
curl --help | grep -q -- --retry-connrefused && CMDLINE="--retry-connrefused"
curl -L -o "$TMPFILE" -w '\nretval:%{http_code}\n' --retry 3 $CMDLINE --max-time 8 --retry-max-time 15 \
"${url_lecture_metadata}${argx}" &> "$WLOG"
ERRCODE=$( awk -F: '{ if ($1 == "retval") print $2 }' "$WLOG" )
RET=$?
if [ "$RET" = 0 ] && [ -n "$ERRCODE" ] && [ "$ERRCODE" -ge 200 ] && [ "$ERRCODE" -lt 300 ]; then
# Success, see if data is usable
if tar -C "$CONFDIR" -x -f "$TMPFILE" && [ -s "$DOWNLOADED_VMX" ]; then
rm -rf -- "$TMPFILE"
return 0
fi
writelog "Extracting metadata.tgz failed. Cannot start VM."
else
writelog "Downloading metadata.tgz failed (RET=$RET, HTTP=$ERRCODE). Cannot start VM.
$( cat $WLOG )"
#
fi
}
## Main ##
call_post_source download_metadata
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