Add gpBackMan — a backup management utility for Apache Cloudberry (Incubating) Backup.

[woblerr]

This PR adds gpBackMan, a utility for managing backups created by gpbackup. The tool provides an open-source alternative to the proprietary gpbackup_manager, addressing the need discussed in apache/cloudberry#1555

gpBackMan is based on the original gpbackman project (woblerr/gpbackman#39) and has been adapted for integration into the cloudberry-backup repository.

Motivation

The Apache Cloudberry community has expressed interest in having a backup management tool similar to gpbackup_manager, which is proprietary and not available in the open-source offering. gpBackMan fills this gap by providing essential backup management capabilities that work with the gpbackup_history.db SQLite history database format.

Features

gpBackMan provides the following functionality:

• backup-info — display information about existing backups;
• report-info — display the backup report for a specific backup;
• backup-delete — delete a specific existing backup from local storage or using storage plugins;
• backup-clean — delete all existing backups older than (or newer than) a specified time condition;
• history-clean — clean deleted backups from the history database;

Both local storage and storage plugin-based backups are supported.

Related links

Discussion: apache/cloudberry#1555 — Availability of GPBackup_Manager in CB2.0
Issue: woblerr/gpbackman#39 — Support for Apache Cloudberry
Original project: gpbackman

[tuhaihe]

Hi @woblerr thanks for your great work!

A license question needs your confirmation here: do you still want to keep these files under the original MIT license, or adopt the Apache license? (MIT files are allowed to be introduced in ASF projects.)

[WARNING] Files with unapproved licenses:
  end_to_end/gpbackman_test.go
  gpbackman.go
  gpbackman/cmd/constants.go
  gpbackman/cmd/interfaces.go
  gpbackman/cmd/backup_info.go
  gpbackman/cmd/backup_clean.go
  gpbackman/cmd/cmd_suite_test.go
  gpbackman/cmd/report_info.go
  gpbackman/cmd/wrappers_test.go
  gpbackman/cmd/history_clean.go
  gpbackman/cmd/root.go
  gpbackman/cmd/backup_delete.go
  gpbackman/cmd/wrappers.go
  gpbackman/README.md
  gpbackman/COMMANDS.md
  gpbackman/gpbckpconfig/utils_db.go
  gpbackman/gpbckpconfig/struct.go
  gpbackman/gpbckpconfig/utils_test.go
  gpbackman/gpbckpconfig/cluster.go

Once you confirm, I can help with it.

[woblerr]

@tuhaihe
I agree to switch these files to the Apache 2.0 license.
It keeps licensing consistent across the entire cloudberry-backup repository.

The original gpbackman project will remain under MIT.
I plan to continue developing features there first and then port them to upstream (if these features will be useful for both projects), so the MIT → Apache 2.0 direction stays clean.

Is it acceptable for you?