1 files changed, 75 insertions, 0 deletions

diff --git a/systemd-zfs-partition-backup.sh b/systemd-zfs-partition-backup.sh
new file mode 100755
index 0000000..91acdfc
--- /dev/null
+++ b/systemd-zfs-partition-backup.sh
@@ -0,0 +1,75 @@
+#!/usr/bin/bash
+logger "================================================================================"
+
+# BACKUP_NAME=$ID_SERIAL-part$ID_PART_ENTRY_NUMBER
+BACKUP_NAME=$(echo $1 | sed -e 's/\\x2d/-/g')
+MOUNT_TARGET=/media/$BACKUP_NAME
+
+function fail() {
+    logger -s -t "$0" "Backup '$1' -> '$2' failed."
+    sudo -u max beep -f 40 -l 500
+    # sudo -u max beep -f 523 -l 150 -n -f 54 -l 600
+}
+
+function start() {
+    DEVNAME=$(echo $1 | sed 's/-/\\x2d/')
+    systemctl restart media-$DEVNAME.automount
+
+    logger -t "$0" "Backup '$1' -> '$2' started."
+    sudo -u max beep -f 147 -l 120 -n -f 294 -l 200 -n -f 831
+}
+
+function stop() {
+    DEVNAME=$(echo $1 | sed 's/-/\\x2d/')
+    systemctl stop media-$DEVNAME.automount
+
+    logger -t "$0" "Backup '$1' -> '$2' finished."
+    sudo -u max beep -f 831 -l 120 -n -f 294 -l 200 -n -f 147
+}
+
+function zfs_snapshot() {
+    zfs diff $LAST_SNAPSHOT > $ZFS_PATH/backup-differences.txt
+    zfs snap media-backup/$BACKUP_NAME@$(date +%Y-%m-%d--%H-%M)
+    echo "Here comes a list of changes since your last backup: $LAST_SNAPSHOT" | mailx -A typesafe -a $ZFS_PATH/backup-differences.txt -s 'Backup overview' max@entwicklerseite.de
+}
+
+start $1
+
+if ! findmnt $MOUNT_TARGET; then
+    logger "$MOUNT_TARGET is not mounted. Cannot back it up."
+    exit 0
+fi
+
+logger ">> Inspecting $BACKUP_NAME"
+ZFS_PATH=$(zfs get mountpoint -H -o value media-backup/$BACKUP_NAME) || fail "$MOUNT_TARGET" "(no zfs dataset found)"
+ZFS_MOUNTPATH=$(findmnt -no source $ZFS_PATH)                        || fail "$ZFS_PATH (not mounted)" "(no association)"
+LAST_SNAPSHOT=$(zfs list -t snap -o name -s creation media-backup/$BACKUP_NAME | tail -n1)
+
+
+# Make sure, that we are really writing where a mountpoint is
+if [ "$ZFS_PATH" == "/$ZFS_MOUNTPATH" ]; then
+    sudo -u max beep -f 831
+    logger "We can start $MOUNT_TARGET -> $ZFS_PATH"
+    rsync -ahoi -x --delete --info=all \
+        "/media/$BACKUP_NAME/"      \
+        "$ZFS_PATH"                 \
+        2>&1 | tee $ZFS_PATH/backup-report.txt && zfs_snapshot
+
+else
+    fail $ZFS_PATH $ZFS_MOUNTPATH
+    exit 1
+fi
+
+
+
+stop $1
+
+# sleep a second so that /dev/disk/by-id/*-part become available
+# sleep 1
+
+# DISK=$(readlink -f /dev/disk/by-id/$ID_BUS-$ID_SERIAL)
+# if ! [ -e "$DISK" ]; then
+#     fail
+#     logger "$DISK: Disk not there :("
+#     exit 1
+# fi