Domain backup and rename
Added in Samba version: v4.9
Samba backups provide a way to recover your Samba network, in the unlikely event that a catastrophic failure of the domain occurs. For more details on the different types of Samba backups and how to use them, see Back up and Restoring a Samba AD DC.
One of the backup options involves renaming the domain (see Domain rename tool). Note that this works completely differently to the Windows tool for renaming domains, i.e. rendom. Windows renames each DC one at a time in situ. Whereas the Samba approach is to take a renamed copy of the domain, and start re-adding DCs again from scratch.
How to configure it
samba-tool domain backup set of commands to create a backup-file. There are three flavours of backup to choose from: online, offline, and rename. Then use
samba-tool domain backup restore to restore the backup-file. Generally, you'll need to run the backup/restore commands as root. See Back up and Restoring a Samba AD DC for more details.
Known issues and limitations
The most important concept to grasp is you're taking a backup of your entire domain, not an individual DC. So restoring the domain is essentially completely replacing the existing domain DCs.
You can't restore the domain to the default install location (i.e. /usr/local/samba). You have to specify a new DC during the restore, i.e. one that is not already in the domain. See our recommended strategy for how to deal work around these problems.
See bug #13621 in Samba bugzilla for current issues in v4.9.0.
How to test it
make test TESTS=blah
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Where the code is located
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