Graylog MongoDB Restore

Overview

Restores the Graylog MongoDB database from the most recent backup archive created by the graylog_mongodb_backup role. Drops and replaces the existing graylog database. Configuration is fully managed by the graylog_install role and is not restored from backup — only the MongoDB data (inputs, pipelines, streams, dashboards, settings) is restored.

What This Role Does

1. Finds the most recent backup archive on the Synology NAS
2. Prompts for confirmation before proceeding
3. Stops graylog-server
4. Copies the archive to a local staging directory and extracts it
5. Runs mongorestore --drop to replace the existing database contents
6. Removes the local staging directory after restore completes
7. Restarts graylog-server

Role Variables

Variable	Description
graylog_mongodb_restore_syno_mount_point	Synology NAS path containing backup archives
graylog_mongodb_restore_mongodb_host	MongoDB host
graylog_mongodb_restore_mongodb_port	MongoDB port
graylog_mongodb_restore_mongodb_db	MongoDB database name
graylog_mongodb_restore_local_tmp	Local staging directory (auto-deleted after restore)

Notes

• Always picks the most recent backup archive from the NAS
• Prompts for confirmation before proceeding
• Uses mongorestore --drop to replace the existing database contents
• graylog-server is stopped during restore, then restarted
• MongoDB itself remains running during the restore
• The local staging directory is automatically removed after restore
• Restore to the same Graylog version as the backup to avoid compatibility issues