Keep a cloned VM updated to be used as a spare VM

[oknet]

How can I keep automatically updated, daily, a stopped VM clone from a running VM (I don't care of data inconsistency, it's a PBX) in order to manual start the clone in case of main VM crash ?
I used to do it with GhettoVCB in ESXi (for who knows it ...)

 

[Matthias.]

Run a daily clone. Although you might as well create a backup instead, that's not really the intended use of clones.

 

[Falk R.]

When you have multiple Nodes, use ZFS Replication.

 

[oknet]

As you understand , the need is to start an immediately working machine in case of failure or mess-up of the corrent one.
So a clone seems a practic way.
Glad to know if there are right (but relatively easy ) solutions.
I’ll look into build a script for clone rotation to avoid cloning latest corrupted machine….