Add a warm standby

A warm standby is a second machine that keeps following the control root’s state, so the install’s records survive if the root’s machine is lost.

1. Pick a machine that has already joined your install.
2. Open Machines and find Standby.
3. Under Machine, choose it, press Make it the standby, then Yes, make it the standby.

The standby’s row shows whether it is up to date. To undo, press Stop being the standby, then Yes, stop it.

Known limits

• Taking over is done on the standby with your passphrase; it is not a button in the console yet.
• After a switch, only the machine that took over reaches the new root.