Adding the patch of Jeroen Hoeckx conc. the added support for DRBD de…

…vices

usr/share/rear/CHANGES

@@ -1,5 +1,7 @@
 Version 1.9.0  - not released
 ---------------------------
+2010-12-15	GD	* add DRBD support patch of Dag/Jeroen (sponsored by Belgian Federal Police #3124341)
+			* doc/configuration-examples.txt added for the beginners.
 2010-12-14	GD	* lib/network-functions.sh: added my_ipcalc replacement for ipcalc (only standard in RHEL/Fedora)
 			* minor fixes in skel/default/bin/dhclient-script
 			* skel/default/etc/scripts/system-setup.d/58-start-dhclient.sh loop over valid interfaces

usr/share/rear/prep/GNU/Linux/29_include_drbd.sh

@@ -0,0 +1,9 @@
+# Include DRBD tools if it's running on the system
+
+if lsmod | grep -q drbd ; then
+    REQUIRED_PROGS=("${REQUIRED_PROGS[@]}" drbdadm drbdsetup drbdmeta)
+    COPY_AS_IS=( "${COPY_AS_IS[@]}" /etc/drbd.* )
+    Log "Including DRBD tools."
+
+    # note that filesystems on DRBD might have to be excluded from the backup
+fi

usr/share/rear/recreate/GNU/Linux/22_create_drbd_configuration.sh

@@ -0,0 +1,31 @@
+# Recreate the DRBD configuration if needed
+# This covers the case of LVM on DRBD, where the DRBD is on physical partitions
+# or on software raid.
+
+# NOTE: "drbdadm -s /bin/drdbsetup" might be needed for some versions of DRBD
+
+if [ -e /etc/drbd.conf ] ; then
+    Log "Restoring DRBD configuration."
+
+    modprobe drbd
+    if [ $? -ne 0 ] ; then
+        LogPrint "Failed to load DRBD module, please configure DRBD manually."
+    fi
+
+    mkdir -p /var/lib/drbd
+
+    # LVM on DRBD
+    # Recreate devices
+    drbdadm create-md all
+
+    # Only attach, do not start synchronization
+    drbdadm attach all
+    drbdadm -- --overwrite-data-of-peer primary all
+    if [ $? -ne 0 ] ; then
+        LogPrint "Failed to restore DRBD configuration, please configure DRBD manually."
+    fi
+
+    ## DRBD on LVM would look like:
+    # drbdadm create-md all
+    # drbdadm up all
+fi