Backup a running cluster
docker cluster backup [OPTIONS] cluster
| Option | Default | Description | 
|---|---|---|
| --env,-e | Set environment variables | |
| --file | backup.tar.gz | Cluster backup filename | 
| --passphrase | Cluster backup passphrase | |
| --dry-run | Skip provisioning resources | |
| --log-level | warn | Set the logging level (“trace”|”debug”|”info”|”warn”|”error”|”fatal”) |