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#!/bin/bash
# Needs full bash
. /opt/openslx/config
[ -z "${SLX_STAGE4}" ] && { echo "SLX_STAGE4 is not set in /opt/openslx/config." && exit 1; }
MOUNTPOINT="/opt/openslx/mnt/stage4"
mkdir -p "$MOUNTPOINT"
if [[ "$SLX_STAGE4" == dnbd3* ]]; then
# dnbd3 it is
if [ -z "${SLX_DNBD3_SERVERS}${SLX_DNBD3_PRIO_SERVERS}" ]; then
slxlog --echo "mount-stage4" "dnbd3 stage4 configured, but SLX_DNBD3(_PRIO)_SERVERS empty or not set in /opt/openslx/config."
exit 1
fi
# Determine revision
if [ -z "$SLX_STAGE4_RID" ] || echo "$SLX_STAGE4_RID" | grep -v -q -E "^[0-9]+$"; then
SLX_STAGE4_RID="0"
fi
# Randomize list
SERVERS=$(for SERVER in $SLX_DNBD3_SERVERS; do echo "$RANDOM $SERVER"; done | sort -u | sed -r 's/^[0-9]+ //')
IMAGE=$(echo $SLX_STAGE4 | awk '{printf $2}')
[ -e /var/run/dnbd3.socket ] || sleep 2 # Ugly, service should only start when dnbd3 daemon is up and running
RET=1337
for SRV in $SLX_DNBD3_PRIO_SERVERS $SERVERS; do
echo "Requesting $IMAGE from $SRV"
dnbd3=$(dnbd3-client -h "$SRV" -i "$IMAGE" -r "$SLX_STAGE4_RID")
RET=$?
[ "$RET" -eq "0" ] && break
echo "... didn't work ($RET)"
sleep 1
done
if [ "$RET" -ne "0" ]; then
slxlog --echo "mount-stage4" "Could not get stage4 via dnbd3 ($IMAGE : $SLX_STAGE4_RID) ($SLX_DNBD3_PRIO_SERVERS / $SERVERS)"
exit $RET
fi
echo "Mounting $dnbd3 to $MOUNTPOINT"
if ! mount -t squashfs -o ro "$dnbd3" "$MOUNTPOINT"; then
slxlog --echo "mount-stage4" "Could not mount stage4 from '$dnbd3' to '$MOUNTPOINT' ($SRV, $IMAGE)"
exit 1
fi
else
# Try nfs
echo "Mounting ${SLX_STAGE4} to $MOUNTPOINT"
if ! mount -t nfs -o ro,async,nolock,vers=3 "$SLX_STAGE4" "$MOUNTPOINT"; then
slxlog --echo "mount-stage4" "Could not mount stage4 from '$SLX_STAGE4' to '$MOUNTPOINT'"
exit 1
fi
fi
echo "Appending $MOUNTPOINT to /"
if mount -o "remount,append:$MOUNTPOINT=ro" /; then
# addons can trigger ldconfig, hence
# make sure no ldconfig is running before copying the real ld cache
while ps aux|grep -v grep|grep -q ldconfig; do
sleep 1
done
cp -r "${MOUNTPOINT}/"etc/ld.* /etc/ || echo "Could not really copy full blown ldconfig from stage4 to live system"
else
slxlog --echo "mount-stage4" "Could not append mounted stage4 at '$MOUNTPOINT' to aufs at /"
exit 1
fi
sleep 2
# dbus reload needed eg. for gnome etc. and perhaps other service files which stage4 needs:
systemctl reload dbus.service
exit 0
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