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.
- Docker installed and running on the system.
red5d/docker-autocomposeimage available for exporting Docker Compose files.- Access to
/var/run/docker.sockto interact with the Docker daemon.
- Copy the script into a file, e.g.,
backup_docker.sh. - Ensure the script is executable:
chmod +x backup_docker.sh
- Run the script manually or add it to crontab for automatic execution:
Add the following line to schedule daily execution at midnight:
crontab -e
0 0 * * * /path/to/backup_docker.sh
Run the script manually:
./backup_docker.shUpon execution, the script performs the following steps:
- Checks and creates the backup directory if it does not exist.
- For each running container:
- Exports its Docker Compose definition to a YAML file.
- Saves environment variables to a text file.
- Creates a tar.gz archive of all backup files.
- Deletes backups older than 30 days.
To modify:
- Backup directory, update the
BACKUP_DIRvariable. - Retention period for old backups, update the
RETENTION_DAYSvariable.
- 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 saveor other tools.
Martin Hasin matoH12
MIT License