My Docker Volume Backup 1.0

Written over QTS 4.4.2

Settings file - DockerVolumeBackupSettings.json

Code (Javascript):

1. {
2.    "Docker":{
3.     "Emby":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/emby_config/_data/BACKUP/",
4.     "Portainer":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/portainer/",
5.     "Qbittorrent":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/qbit/",
6.     "Radarr":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/radarr/_data/Backups/",
7.     "Sonarr":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/sonarr/_data/Backups/",
8.     "Lidarr":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/lidarr/_data/Backups/",
9.     "Jackett":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/jackett/",
10.     "SmokePing_Data":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/smokeping_data/",
11.     "SmokePing_Config":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/smokeping_config/",
12.     "JDownloader":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/jdownloader_config/",
13.     "NetBootXYZ_Config":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/netbootxyz_config/",
14.     "NextCloud_config":"/share/CACHEDEV1_DATA/Container/container-station-data/lib/docker/volumes/nextcloud_config/"
15. },
16.     "BackupLocation":"/share/CACHEDEV2_DATA/DATA2/export/DockerVolumes/",
17.     "BackupsToKeep":"7",
18.     "Compression7z":"-mx=9",
19.     "Archiver":"/usr/local/sbin/7z"
20. }

Script - DockerVolumeBackup.sh (do not forget to chmod +x DockerVolumeBackup.sh !)

Code (Bash):

1. #!/usr/bin/env bash
2. #expand PATH VARIABLE .. just in case
3. PATH=$PATH:/usr/local/sbin/
4. command -v jq >/dev/null 2>&1 || { echo "I require jq but it's not installed.  Aborting." >&2; exit 1; }
5.  
6. #get current date in file name friendly format
7. cdate=$(date +%Y-%m-%d_%H-%M)
8.  
9. #Settings for backup
10. JSON="/share/CACHEDEV2_DATA/DATA2/autoruns/DockerVolumeBackupSettings.json"
11. # check if file exists
12. if [ ! -f $JSON ]; then
13. echo "Cannot locate file with settings data ! Aborting !" >&2;
14. exit 1;
15. fi
16.  
17. compression_level=$(jq -r '.Compression7z' $JSON)
18. archiver=$(jq -r '.Archiver' $JSON)
19.  
20. # set backup location
21. BACKUP_LOCATION=$(jq -r '.BackupLocation' $JSON)
22. # get all dockers to backup from JSON
23. DOCKERS=$(jq -r '.Docker | keys[] as $k | "\($k)"' $JSON)
24. # convert to bash array
25. array=($DOCKERS)
26. # loop over array and do magic
27. for i in ${array[@]}; do
28. DOCKER_NAME="$i"
29. DOCKER_PATH=$(jq -r ".Docker.$i" $JSON)
30. # build command to execute
31. CMD="$archiver a $compression_level $BACKUP_LOCATION$cdate"_"$DOCKER_NAME.7z $DOCKER_PATH"
32. echo "Executing -> "$CMD
33. #execute it ?
34. eval $CMD
35. done
36. #keep last X backups
37. BACKUPS_TO_KEEP=$(jq -r '.BackupsToKeep' $JSON)
38. echo "Keeping last $BACKUPS_TO_KEEP backups in $BACKUP_LOCATION..."
39. find $BACKUP_LOCATION -type f -mtime +$BACKUPS_TO_KEEP -delete

Add to qnap's crontab line (example):
0 4 * * * /share/CACHEDEV2_DATA/DATA2/autoruns/DockerVolumeBackup.sh 1>/dev/null 2>&1 and do not forget to reload crontab service afterwards !