Skip to content

Latest commit

 

History

History
56 lines (44 loc) · 1.7 KB

README.md

File metadata and controls

56 lines (44 loc) · 1.7 KB

docker-backup-script

Description

This Bash script performs automatic backups of Docker configuration files and environment variables for all running containers. The backups are stored in the /backup/docker directory, and backups older than 30 days are automatically deleted.

Requirements

  • Docker installed and running on the system.
  • red5d/docker-autocompose image available for exporting Docker Compose files.
  • Access to /var/run/docker.sock to interact with the Docker daemon.

Installation

  1. Copy the script into a file, e.g., backup_docker.sh.
  2. Ensure the script is executable: 
    chmod +x backup_docker.sh
  3. Run the script manually or add it to crontab for automatic execution: 
    crontab -e
    Add the following line to schedule daily execution at midnight: 
    0 0 * * * /path/to/backup_docker.sh

Usage

Run the script manually:

./backup_docker.sh

Upon execution, the script performs the following steps:

  1. Checks and creates the backup directory if it does not exist.
  2. For each running container:
    • Exports its Docker Compose definition to a YAML file.
    • Saves environment variables to a text file.
  3. Creates a tar.gz archive of all backup files.
  4. Deletes backups older than 30 days.

Configuration

To modify:

  • Backup directory, update the BACKUP_DIR variable.
  • Retention period for old backups, update the RETENTION_DAYS variable.

Notes

  • This script does not back up Docker volumes or stored data inside containers, only configuration files and environment variables.
  • For full data backup, consider using docker save or other tools.

Author

Martin Hasin matoH12

License

MIT License