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Backup nested zfs volumes to Backblaze with duplicacy
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| #! /usr/bin/env bash | |
| function tryUpload() { | |
| (duplicacy backup -limit-rate 820 -threads 8 -stats) && | |
| (duplicacy prune -exclusive -keep 360:360 -keep 30:180 -keep 7:30 -keep 1:7) | |
| return $? | |
| } | |
| date | |
| ( | |
| # Wait for lock on /var/lock/.myscript.exclusivelock (fd 200) for 10 seconds | |
| flock -x -w 10 200 | |
| if [ $? -eq 0 ]; then | |
| # exit on error | |
| set -euo pipefail | |
| if [ -z "$(zfs list -r -t snapshot -o name -H -S name tank/backups | grep tank/backups@snap1)" ]; then | |
| zfs snapshot -r tank/backups@snap1 | |
| zfs list -r -t snapshot -o name -H -S name tank/backups | sed -r 's/^(tank\/backups)(.*)(@snap1$)/\1\2\3 tank\/backups\/.backup-dup\2/' | xargs --max-args=2 zfs clone -o readonly=on | |
| echo "snapshot & clone created" | |
| else | |
| echo "Previous backup was interrupted (power loss or shutdown), trying to resume backup" | |
| fi | |
| cd /mnt/disk0/backups/.backup-dup | |
| retry=0 | |
| maxRetries=38 | |
| retryInterval=60 | |
| until [ ${retry} -ge ${maxRetries} ] | |
| do | |
| tryUpload && break | |
| retry=$[${retry}+1] | |
| echo "Retrying B2 upload [${retry}/${maxRetries}] in ${retryInterval}(s) " | |
| sleep ${retryInterval} | |
| done | |
| if [ ${retry} -ge ${maxRetries} ]; then | |
| echo "Failed after ${maxRetries} attempts !" | |
| date | |
| exit 1 | |
| fi | |
| cd /mnt/disk0/backups | |
| zfs destroy -r tank/backups/.backup-dup | |
| zfs destroy -r tank/backups@snap1 | |
| echo "snapshot & clone destroyed" | |
| date | |
| exit 0 | |
| else | |
| echo "backup-dup_B2 is already running" | |
| exit 1 | |
| fi | |
| ) 200>/var/lock/backup-dup_B2.exclusivelock |
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