Docker Backup Scripts

Simple shell scripts for backing up Docker-related data and pruning old backups.

Files

• docker-backup.sh - create backups
• dockerbackup_prune.sh - prune old backups
• containers.txt - list of containers or backup targets
• .env.example - example environment file

Reqirements

docker-compose

BACKUPS: Example use docker-backup.sh

Configure the backup script, docker-backup.sh Set up your list of containers in container.txt . The script assumes each container is in a subdirectory of one main docker directory

Edit the location of where you want docker backups stored in docker-backup.sh (default is "/dockerbackups") or use

./docker-backup.sh -s /home/me/mycontainers

It will recurse though the directories if they are listed in containers.txt . It will run docker-compose to take down the container, pull a new version if there is one, then bring the container back up. Then it will create a timestamped archive of each container in the backup directory, under a directory with that container name.

Usage:  ./docker-backup.sh [-f containers_list_file] [-s source_base_dir] [-t] [-v] [-h]

Flags:
 -t          Test (dry run; no backups performed)
 -v          Verbose (debug logging to stderr)
 -f FILE     File containing list of container names
             Default: '$containersfile'
 -s DIR      Base directory containing container/project folders
             Default: '$SOURCE_BASE_DIR'
 -h          Show this help

PRUNE and REMOTE BACKUP dockerbackup_prune.sh

Set up the env file using the example. cp .env.example .env

You don't need to worry about the rclone info (backups to google drive) it you won't be using that. It will just backup up the file locally. Feel free to adjust for other remote backup systems.

If you run .dockerbackup_prune.sh it will prune the number of backup archives that are already there (based on your prune numbers), make a .zst archive of all container backups then finally uploades to google drive and deletes the large archive (if that's what you set). Then it will prune the number of archive files for each

local archive only (no pruning) ./dockerbackup_prune.sh

local archive + real prune, keep new archive locally. Default prune is 5 archives) ./dockerbackup_prune.sh --apply

local archive + upload + prune dry-run (no actual prune), keep new archive locally (default location is /tmp) ./dockerbackup_prune.sh --rclone

full remote archive, google drive upload + real prune (default 5) + delete new local archive ./dockerbackup_prune.sh --rclone --apply

Full remote workflow with actual prune leaving 3 archives of each container and final full archive delete. Specify location of docker archives, final archive dir and remote google drive folder.

Usage: $0 [--apply] [--quiet] [--dry-run] [--keep N] [--root PATH] [--source PATH] [--outdir PATH] [--remote PATH]

Flags:
  --rclone       Enable rclone upload flow
  --apply        Actually delete pruned files; with --rclone also delete the new local archive
  --quiet        Minimal console output (no live progress)
  --dry-run      Simulate everything (no backup, no upload, no deletes)
  --keep N       Keep newest N .zst files per subfolder (default ${KEEP_COUNT})
  --root PATH    Root folder to prune (default ${PRUNE_ROOT})
  --source PATH  Folder to archive (default ${SOURCE_DIR})
  --outdir PATH  Where to write the .zst (default ${OUT_DIR})
  --remote PATH  rclone destination (default ${RCLONE_REMOTE})