1 files changed, 83 insertions, 0 deletions
diff --git a/etc/nextcloudpi-config.d/nc-snapshot.sh b/etc/nextcloudpi-config.d/nc-snapshot.sh
new file mode 100644
index 00000000..5df87e18
--- /dev/null
+++ b/etc/nextcloudpi-config.d/nc-snapshot.sh
@@ -0,0 +1,83 @@
+#!/bin/bash
+# Nextcloud BTRFS snapshots
+#
+# Copyleft 2017 by Ignacio Nunez Hernanz <nacho _a_t_ ownyourbits _d_o_t_ com>
+# GPL licensed (see end of file) * Use at your own risk!
+#
+# Usage:
+# 
+#   ./installer.sh nc-snapshot.sh <IP> (<img>)
+#
+# See installer.sh instructions for details
+#
+# More at https://ownyourbits.com/2017/02/13/nextcloud-ready-raspberry-pi-image/
+#
+
+LIMIT_=4
+DESCRIPTION="Create BTRFS snapshot of the datadir"
+
+INFO="Snapshots take up very little space because only the differences from one 
+to the next are saved. This requires the datadir to be in a BTRFS filesystem"
+
+BASEDIR=/var/www
+
+configure()
+{
+  local DATADIR
+  DATADIR=$( cd "$BASEDIR"/nextcloud; sudo -u www-data php occ config:system:get datadirectory ) || {
+    echo -e "Error reading data directory. Is NextCloud running and configured?";
+    return 1;
+  }
+  local SNAPSHOT=${DATADIR}_$( date +"%F" )
+
+  # file system check
+  [[ "$( stat -fc%T "$DATADIR" )" != "btrfs" ]] && {
+    echo "The datadir is not in a BTRFS filesystem"
+    return 1
+  }
+  local DESTDIR="$( dirname "$DATADIR" )"
+
+  # do it
+  sudo -u www-data php "$BASEDIR"/nextcloud/occ maintenance:mode --on
+
+  [[ -d "$SNAPSHOT" ]] && {
+    btrfs subvolume delete "$SNAPSHOT" &>/dev/null
+    rm -rf "$SNAPSHOT"                 &>/dev/null
+  }
+  btrfs subvolume snapshot -r "$DATADIR" "$SNAPSHOT" || return 1
+
+  # prune older backups
+  [[ $LIMIT_ != 0 ]] && {
+
+    local SNAPS=( $( btrfs subvolume list -s --sort=gen "$DESTDIR" | awk '{ print $14 }' ) )
+    cd "$DESTDIR" || return 1
+    [[ ${#SNAPS[@]} -gt $LIMIT_ ]] && \
+      echo "Pruning old snapshots..." && \
+      for (( i=0; i < $(( ${#SNAPS[@]} - LIMIT_ )); i++ ));do 
+        btrfs subvolume delete "${SNAPS[$i]}"
+      done
+  }
+
+  sudo -u www-data php "$BASEDIR"/nextcloud/occ maintenance:mode --off
+  echo -e "snapshot $SNAPSHOT generated"
+}
+
+install() { :; }
+
+# License
+#
+# This script is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This script is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this script; if not, write to the
+# Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+# Boston, MA  02111-1307  USA
+