Ovirt hosted engine misunderstandings?

Question

linux

Hello.
Decide to deploy a cluster at the enterprise and collect all the virtual machines there, which are now lying around somewhere.
Since we can say that there is no budget...
The configuration will be small, 3 nodes + a separate NFS storage.
Question actually on Hosted Engine.
The topic is not quite disclosed, what will happen if the host with the Engine falls out? Engine independently migrates to another host (restarts like virtual machines restart when their host is down) and in principle everything will be transparent? Or how does this even happen?
And I didn’t quite understand about installing new nodes with the option with Hosted Engine ...

Answer 1

If a host with an engine goes down, hosted-engine will profensit it on other hosts and bring the engine back up on another host. When the engine rises, it will see the fallen host and will raise HA-enabled virtual machines on it on other hosts. Everything that ran on other hosts will continue to work. A crashed engine does not mean a system shutdown.
New nodes are installed regularly, but they will not participate in the HA algorithm for the hosted engine without hosted-engine run. Thus, you can control on which hosts the engine can be understood and which cannot

Answer 2

Nothing migrates anywhere, in fact, if the kernel falls off, everything will work further? moreover, you can steer the cluster even from virsh, even from virtmanager. If you need a fault-tolerant head, I advise you to make a hot standby.