dockerbackup

A simple shell script to back up Docker containers, images, and volumes.

Usage

./dockerbackup.sh /path/to/backup/directory [--include_images] [--exclude_containers <c1,c2>] [--exclude_images <i1,i2>] [--exclude_volumes <v1,v2>]

• /path/to/backup/directory: The directory where the backup files will be stored. This is a required argument.
• [--include_images]: An optional argument to include Docker images in the backup.
• [--exclude_containers <c1,c2>]: An optional argument to exclude a comma-separated list of containers from the backup.
• [--exclude_images <i1,i2>]: An optional argument to exclude a comma-separated list of images from the backup.
• [--exclude_volumes <v1,v2>]: An optional argument to exclude a comma-separated list of volumes from the backup.

What it backs up

• Docker Containers: Exports all containers (both running and stopped) as .tar files.
• Docker Images: If the --include_images flag is provided, it saves all Docker images as .tar files.
• Docker Volumes: Backs up all Docker volumes as .tar.gz files.

Prerequisites

• Docker must be installed and running on the system where you run the script.
• The script uses the busybox image to back up volumes. If you don't have it, Docker will pull it automatically.

Additional notes

• Ensure your save path is included in a cloud backup to ensure offsite backup of the files.
• Use crontab for automated backups. It will currently overwrite the last backup file, so it only retains the most recent backup. I have an incremental cloud backup system in place that handles changes over time for me.