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#!/usr/bin/env bash
## Configs ##
ZFSSNAPSHOTNAME="duplicacy"
mountSnapshots () {
mkdir -p "/mnt/$ZFSSNAPSHOTNAME"
mount -t zfs "$ZFSSNAPSHOTBASE@$ZFSSNAPSHOTNAME" "/mnt/$ZFSSNAPSHOTNAME"
while read -r line
do
MOUNTPATH=$(echo "$line" | sed "s/$ESCAPEDZFSSNAPSHOTBASE\///" | sed "s/@$ZFSSNAPSHOTNAME//")
if [ -d "/mnt/$ZFSSNAPSHOTNAME/$MOUNTPATH" ]; then
mount -t zfs "$line" "/mnt/$ZFSSNAPSHOTNAME/$MOUNTPATH"
fi
done < <(zfs list -t snapshot | grep "$ZFSSNAPSHOTNAME" | grep "$ZFSSNAPSHOTBASE" | grep -v "$ZFSSNAPSHOTBASE/\." | grep -o "$ZFSSNAPSHOTBASE/[0-9,a-z,A-Z,/,[:space:]]*@$ZFSSNAPSHOTNAME" | sed 's/[[:space:]]*$//')
}
unmountSnapshots () {
while read -r line
do
MOUNTPATH=$(echo "$line" | sed "s/$ESCAPEDZFSSNAPSHOTBASE\///" | sed "s/@$ZFSSNAPSHOTNAME//")
if [ -d "/mnt/$ZFSSNAPSHOTNAME/$MOUNTPATH" ]; then
umount "/mnt/$ZFSSNAPSHOTNAME/$MOUNTPATH"
fi
done < <(zfs list -t snapshot | grep "$ZFSSNAPSHOTNAME" | grep "$ZFSSNAPSHOTBASE" | grep -v "$ZFSSNAPSHOTBASE/\." | grep -o "$ZFSSNAPSHOTBASE/[0-9,a-z,A-Z,/,[:space:]]*@$ZFSSNAPSHOTNAME" | sed 's/[[:space:]]*$//' | tail -r)
umount "/mnt/$ZFSSNAPSHOTNAME"
rmdir "/mnt/$ZFSSNAPSHOTNAME"
}
exitCleanup () {
trap SIGINT
cd "/"
unmountSnapshots
zfs destroy -r "$ZFSSNAPSHOTBASE@$ZFSSNAPSHOTNAME"
rm $PIDFILE
exit
}
createPIDFile () {
if [ -f $PIDFILE ]
then
PID=$(cat $PIDFILE)
ps -p $PID > /dev/null 2>&1
if [ $? -eq 0 ]
then
echo "Process already running"
exit 1
else
## Process not found assume not running
echo $$ > $PIDFILE
if [ $? -ne 0 ]
then
echo "Could not create PID file"
exit 1
fi
fi
else
echo $$ > $PIDFILE
if [ $? -ne 0 ]
then
echo "Could not create PID file"
exit 1
fi
fi
}
if [ $# -eq 1 ]
then
BASENAME=$(basename $1)
RUNNAME="$ZFSSNAPSHOTNAME-$BASENAME"
ZFSSNAPSHOTBASE=$(zfs list | grep "$BASENAME" | grep -v "$BASENAME/" | awk '{print $1}')
ESCAPEDZFSSNAPSHOTBASE=$(echo "$ZFSSNAPSHOTBASE" | sed 's/\//\\\//')
PIDFILE=/var/lock/$RUNNAME.pid
ISOTIME=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
YEAR=$(date -u +"%Y")
createPIDFile
zfs snapshot -r "$ZFSSNAPSHOTBASE@$ZFSSNAPSHOTNAME"
trap "exitCleanup" INT
mountSnapshots
# Do tha backup dance!
cd "/mnt/$ZFSSNAPSHOTNAME"
duplicacy -log backup -threads 10 -stats >> "/var/log/$RUNNAME.log"
cd "/"
unmountSnapshots
zfs destroy -r "$ZFSSNAPSHOTBASE@$ZFSSNAPSHOTNAME"
rm $PIDFILE
else
echo "Argument should be: path remote"
fi
@ilium007
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ilium007 commented Nov 2, 2019

Where is the 'remote' part of the script? I see no reference to $2 from the command line incantation.

@cnrd
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cnrd commented Nov 2, 2019

It shouldn't be there, it's a copy paste error from when adapted the script from an rclone version of the same.

You can just supply the path.

@cnrd
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cnrd commented Nov 2, 2019

No you can just ignore the second parameter

@ilium007
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ilium007 commented Nov 2, 2019

No you can just ignore the second parameter

How does it know where to send the backups?

root@freenas:~ # ./duplicacy_freebsd_x64_2.2.3 backup --help
NAME:
   duplicacy backup - Save a snapshot of the repository to the storage

USAGE:
   duplicacy backup [command options]

OPTIONS:
   -hash                        detect file differences by hash (rather than size and timestamp)
   -t <tag>                     assign a tag to the backup
   -stats                       show statistics during and after backup
   -threads <n>                 number of uploading threads
   -limit-rate <kB/s>           the maximum upload rate (in kilobytes/sec)
   -dry-run                     dry run for testing, don't backup anything. Use with -stats and -d
   -vss                         enable the Volume Shadow Copy service (Windows and macOS using APFS only)
   -vss-timeout <timeout>       the timeout in seconds to wait for the Volume Shadow Copy operation to complete
   -storage <storage name>      backup to the specified storage instead of the default one
   -enum-only                   enumerate the repository recursively and then exit

root@freenas:~ #

I don't see where the '-storage' option has been defined.

@ilium007
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ilium007 commented Nov 3, 2019

After reading the docs again I am assuming I do an 'init' in the root of the data to be backed up and the .duplicity directory is then available from within the ZFS snapshot. The preferences file would then have the storage URL and other metadata to allow the backup to run.

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